Entries |
Document | Title | Date |
20080198927 | Weighted prediction video encoding - A method of encoding a source picture using at least two reference pictures by dividing the source picture into regions based on a predetermined criterion and dividing the reference pictures into corresponding regions using the predetermined criterion. At least luminance values for the source picture are obtained by weighting and offsetting luminance values of at least one of the regions of at least one of the reference pictures by an average luminance difference between the region of the reference picture and the corresponding region of the source picture. The weighted and offset luminance values from the at least two reference pictures are averaged or summed to predict luminance values of the source picture. | 08-21-2008 |
20080198928 | INFORMATION PROCESSING APPARATUS AND INTER-PREDICTION MODE DETERMINING METHOD - According to one embodiment, an information processing apparatus includes an inter-prediction unit which generates a prediction signal, a transformation unit which orthogonal transform a prediction residual signal between the prediction signal and a picture signal of the macro block, and an inter-prediction mode determining unit which determines a combination of an inter-prediction mode used by the inter-prediction unit and DCT used by the transformation unit for each macro block. The inter-prediction mode determining unit includes a first selection unit which selects a preset number of inter-prediction modes from plural types of inter-prediction mode with a specified type of DCT, and a second selection unit which selects a combination of one inter-prediction mode and one DCT from the preset number of inter-prediction modes selected by the first selection unit and the plural types of DCT. | 08-21-2008 |
20080205519 | Displayport CE system control functionality - An improved method and apparatus is disclosed for communicating control information between components of an audio/video system. Processing and control logic is implemented to transfer a plurality of data streams on predetermined channels of a digital video interface. A first data stream contains video data received by a video interface receiver, where it is used to generate an image on a digital display. A second data stream contains control data, which is similarly received by the video interface receiver, and is used to control source devices coupled to the digital display. | 08-28-2008 |
20080205520 | Method of coding a video signal - The invention relates to methods and apparatuses for encoding and decoding of a video sequence. In connection with encoding/decoding a video sequence it is desirable to increase the video quality without having to increase the bit-rate for the encoded video too much, thereby still providing a bit-efficient representation of the video. If multiple descriptions of the video sequence is used the invention improves the video quality without any increase of the bit-rate. According to the invention, this is achieved by using two or more coding units for encoding the same video sequence, wherein the encoding units perform their encoding operations displaced in time in relation to each other. Correspondingly, two or more decoding units are used for decoding the same video sequence, wherein the decoding units perform their decoding operations displaced in time in relation to each other. | 08-28-2008 |
20080212674 | METHOD AND APPARATUS FOR VIDEO DECODING AND DE-INTERLACING - A method for video decoding in a video decoding/de-interlacing display apparatus that utilizes a storage device having four frame buffers is provided. The method includes following steps: (a) decoding video data of a next picture; (b) if the next picture is a B picture, buffering the decoded video data of the next picture into a frame buffer of the storage device not stored with a reference picture nor a present display picture nor a previous display picture; and (c) if step (b) is not applicable, buffering the decoded video data of the next picture into a frame buffer of the storage device stored with the previous display picture. | 09-04-2008 |
20080219348 | DATA EMBEDDING APPARATUS, DATA EXTRACTING APPARATUS, DATA EMBEDDING METHOD, AND DATA EXTRACTING METHOD - A data embedding apparatus including: a selecting unit for selecting, based upon the second data, a prediction system of calculating a prediction value with respect to data to be processed within the first data; a predicting unit for calculating the prediction value of the data to be processed by the prediction system selected by the selecting unit; a difference calculating unit for calculating a prediction error of the data to be processed by employing the prediction value; and a prediction error calculating unit for outputting the coded data, in which the predicting unit includes: a 0-embedding time predicting unit for performing prediction when a bit value of the second data is “0”; a 1-embedding time predicting unit for performing prediction when the bit value of the second data is “1”; and an embedding end time predicting unit for performing prediction when embedding of the second data is accomplished. | 09-11-2008 |
20080225946 | Error Concealment Technique Using Weighted Prediction - A decoder ( | 09-18-2008 |
20080225947 | QUANTIZATION FOR HYBRID VIDEO CODING - Method for coding a video signal using hybrid coding, comprising: reducing temporal redundancy by block based motion compensated prediction in order to establish a prediction error signal; performing quantization samples of the prediction error signal or on coefficients resulting from a transformation of the prediction error signal into the frequency domain to obtain quantized values, representing quantized samples or quantized coefficients respectively; calculating a quantization efficiency for the quantized values; calculating a zero efficiency for a quantization, when the quantized values are set to zero; selecting the higher efficiency; and maintaining the quantized values or setting quantized values to zero, for further proceeding, depending on the selected efficiency. | 09-18-2008 |
20080225948 | Method of Data Reuse for Motion Estimation - A so-called inter-macroblock parallelism is proposed for motion estimation. First, pixel data of one of the consecutive candidate blocks in an overlapped region of search windows of current blocks in a reference frame including reference blocks corresponding to the current blocks are read and transferred to a plurality of processing element (PE) arrays in parallel. The plurality of PE arrays are used to determine the match situation of the current blocks and the reference blocks. Then, the above process is repeated for the rest of the candidate blocks in sequence. For example, if there are four current blocks CB | 09-18-2008 |
20080225949 | VIDEO ENCODING METHOD, VIDEO DECODING METHOD, VIDEO ENCODING APPARATUS, VIDEO DECODING APPARATUS, VIDEO ENCODING PROGRAM, AND VIDEO DECODING PROGRAM - A video processing system is provided with video encoding apparatus | 09-18-2008 |
20080232467 | Image Decoding Method - There is provided an image decoding method for decoding a picture to be decoded by referencing an appropriate picture even when random access reproduction is performed. The method includes: a first storage step (S | 09-25-2008 |
20080232468 | METHOD AND APPARATUS FOR ADAPTIVE GOP STRUCTURE DETERMINATION - A video encoder, determining a Group of Picture (GOP) structure and a method thereof. The video encoder comprises an input frame buffer, an I-frame module and a P-frame module. The input frame buffer receives and stores input frames. The I-frame module coupled to the input frame buffer identifies an I-frame based on a correlation between two consecutive input frames to obtain the GOP size. The P-frame module coupled to the input frame buffer and the I-frame module, determines P-frames in the GOP having the GOP size based on the GOP rate. | 09-25-2008 |
20080232469 | Rate Control for a Multimedia Compression and Encoding System - A rate controller for allocating a bit budget for video frames to be encoded is disclosed. The rate controller of the present invention considers many different factors when determining the frame bit budget including: desired video quality, target bit rate, frame type (intra-frame or inter-frame), frame duration, intra-frame frequency, frame complexity, intra-block frequency within an intra-frame, buffer overflow, buffer underflow, and the encoded video frame quality for a possible second pass. | 09-25-2008 |
20080232470 | Method of Scalable Video Coding and the Codec Using the Same - Since joint scalable video coding (JSVC) adopts a scheme in which numbers are assigned to all of the pictures according to the order in which the pictures are displayed, it is difficult to detect a drop (or loss) of a key picture and thus it is difficult to effectively take action against an error caused by the loss of the key picture. The present invention provides a coding method of detecting a loss of a key picture by numbering key pictures in JSVC in which predictive (P) pictures have a closed-loop structure and of effectively taking action against an error in the case of a loss of a key picture, and a codec using the coding method. The SVC method includes performing encoding while assigning a number to a key picture of an upper layer and performing decoding with respect to the number-encoded current key picture of the upper layer using data of a decoded image of a picture of a lower layer that is temporally matched with the current key picture of the upper layer when a loss of a key picture between the number-encoded current key picture of the upper layer and a previous key picture that is number-encoded prior to the current key picture is detected. Therefore, it is possible to effectively take action against to an error caused by a loss of a key picture by detecting the loss of a key picture during decoding by encoding using numbering of key pictures in JSVC in which closed-loop coding is performed by consecutively predicting key pictures. Moreover, it is possible to minimize degradation in image quality by concealing an error caused by an incorrect reference by using data of a decoded image of a corresponding picture of a lower base layer when a key picture of an upper layer is lost in an environment where transmission of the lower base layer is guaranteed with a video stream having a multi-layered structure. | 09-25-2008 |
20080240238 | INTRA PREDICTION SYSTEM OF VIDEO ENCODER AND VIDEO DECODER - There is provided an intra prediction system having high prediction performance and satisfactory encoding efficiency in a pattern image in which pixel value is periodically changed and a pattern image in which pixel value has a constant change tendency like gradation effect. A frequency component extraction unit allows a pixel value of an encoded MB to be made one-dimensional for one-dimensional orthogonal conversion. A frequency component-considering prediction value calculation unit receives, as inputs, a pixel value of an encoded adjacent MB and an alternating current frequency component output to create an orthogonal conversion coefficient. The orthogonal conversion coefficient then is subjected inverted orthogonal conversion (IDCT) to generate a prediction value p(i). A prediction direction determination unit selects and outputs a prediction value p′ (i) in a prediction direction having the highest encoding efficiency among a conventional prediction value calculation unit and a prediction value calculation unit according to the present invention. | 10-02-2008 |
20080240239 | METHODS AND APPARATUS TO SELECTIVELY REDUCE STREAMING BANDWIDTH CONSUMPTION - Methods and apparatus to selectively transmit compressed data based upon whether a image movement threshold has been met. In one embodiment, edge map frames are transmitted during periods of camera movement. Edge maps generated from a video stream are processed to identify the periods of camera movement. | 10-02-2008 |
20080247463 | LONG TERM REFERENCE FRAME MANAGEMENT WITH ERROR FEEDBACK FOR COMPRESSED VIDEO COMMUNICATION - An apparatus, software encoded in tangible media, and a method at an encoder. The method includes sending compressed video data including a reference frame message to create a long term reference frame to a plurality of decoders at one or more destination points, receiving feedback from the decoders indicative of whether or not the decoders successfully received the reference frame message, and in the case that the received feedback is such that at least one of the decoders did not successfully receive the reference frame message or does not have the indicated recent frame, repeating sending a reference frame message to create the long term reference frame. Using the method can replaces I-frame error recovery with long term reference frames, even in the case where the reference frame management messages are lost to at least one decoder. | 10-09-2008 |
20080247464 | METHOD AND APPARATUS FOR ENCODING AND DECODING BASED ON INTRA PREDICTION USING DIFFERENTIAL EQUATION - Provided are a method and apparatus for encoding and decoding an image based on intra prediction. The image encoding method comprises determining boundary values of a differential equation that is to be used to intra-predict a current block based on pixel values of pre-encoded pixels adjacent to the current block, predicting the current block using the differential equation and the boundary values and encoding the current block based on the prediction block of the current block. | 10-09-2008 |
20080253451 | Methods for real-time monitoring time reference in decoding systems - A method for real-time monitoring time related information in a bitstream by employing a prediction model is disclosed. When a bitstream is inputted to an decoding system, the bitstream having a series of embedded time references is decoded; a current time reference of the bitstream is sequentially supplied to a prediction model in real-time to generate an estimate time reference; determine whether the next time reference is valid based on the estimate time reference; and if the next time reference is determined as invalid, the frame associated with the next time reference is dropped from the bitstream, or the next time reference is corrected. Consequently, the timing of the bitstream is constantly monitored to prevent errors caused by incorrect timing information carried by the bitstream. | 10-16-2008 |
20080253452 | Video Encoder Using a Refresh Map - The present invention relates to a video encoder (ENC) for encoding frames (FR) of a video signal before transmission, said video encoder (ENC) including an encoding decision unit (EDU) for deciding which kind of coding will be used for each data of said frame (FR) in an encoding unit (ENU). Said video encoder (ENC) further implements a freshness map calculation unit (FMCU) for calculating, throughout the time, for each data of said frame (FR), a corresponding freshness value (FV) taking into account Intra and Inter prediction mechanisms, independently from a calculation of a distortion. Said freshness value (FV) express on which degree encoded data (ED) are relying on previously transmitted data and said freshness value (FV) is used by said encoding decision unit (EDU). | 10-16-2008 |
20080253453 | MOVING PICTURE DISPLAY APPARATUS - A moving picture display apparatus is for displaying, on a liquid crystal panel or the like, moving picture data generated by encoding according to a predictive encoding method. In parallel with picture decoding processing, the moving picture display apparatus finds minimum values and a maximum values of YUV data of a picture being decoded, and when the picture is being displayed, performs backlight control based on an upper bound value of RGB data found from YUV data of the picture. | 10-16-2008 |
20080260026 | Moving-picture coding apparatus, method and program - Decoded is a first stream carrying moving-picture signals coded with a first coding scheme with a first intra-picture coding and an inter-picture coding technique, thus generating decoded moving-picture data. Picture-type information on each frame or field picture of the decoded moving-picture data is generated. The picture-type information indicates a first picture type or a second picture type. The first picture type is for each picture coded with the first intra-picture coding technique whereas the second picture type is for each picture coded with the inter-picture coding technique. The decoded moving-picture data is encoded with a second coding scheme with a second intra-picture coding technique, thus generating a second stream. Auxiliary information areas are created in the second stream. Each auxiliary information area is accessible in relation to each picture of the decoded moving-picture data. The picture-type information is inserted into the auxiliary information areas. | 10-23-2008 |
20080260027 | MODE UNIFORMITY SIGNALING FOR INTRA-CODING - Techniques for efficiently signaling one or more prediction modes for blocks in a macroblock. A mode uniformity indicator is provided for each macroblock to indicate whether all blocks in the macroblock are to be predicted using the same prediction mode. In an embodiment, an encoder signals a mode uniformity indicator and a prediction mode. In another embodiment, a decoder receives a mode uniformity indicator and a prediction mode, and predicts at least two blocks of the macroblock using the prediction mode if the mode uniformity indicator is true. | 10-23-2008 |
20080267286 | Image Encoding Device and Method - An image encoding device includes a prediction processing unit which performs prediction processing on m components among N components which constitute a quantized block; a first Coded Block Pattern (CBP) judging unit which judges whether or not (N−m) components include a non-zero component in a first operation mode, and whether or not (N−n) components include a non-zero component in a second operation mode; a second CBP judging unit which judges whether or not the m components on which the prediction processing has been performed include a non-zero component in the first operation mode, and whether or not n components include a non-zero component in the second operation mode; and a CBP generating unit which generates a CBP code indicating whether or not all the components of the block are 0 components based on the judgments made by the first and second judging units. | 10-30-2008 |
20080267287 | SYSTEM AND METHOD FOR IMPLEMENTING FAST TUNE-IN WITH INTRA-CODED REDUNDANT PICTURES - A system and method by which instantaneous decoding refresh (IDR)/intra pictures that enable one to tune in or randomly access a media stream are included within a “normal” bitstream as redundant coded pictures. In various embodiments, each intra picture for tune-in is provided as a redundant coded picture, in addition to the corresponding primary inter-coded picture. | 10-30-2008 |
20080267288 | METHOD, APPARATUS, AND SYSTEM FOR ENHANCING ROBUSTNESS OF PREDICTIVE VIDEO CODECS USING A SIDE-CHANNEL BASED ON DISTRIBUTED SOURCE CODING TECHNIQUES - A method, apparatus, and system for providing distributed source coding techniques that improve data coding performance, such as video data coding, when channel errors or losses occur. Errors in the reconstruction of the data is eliminated or reduced by sending extra information. Correlation between a predicted sequence and an original sequence can be used to design codebooks and find the cosets required to represent the original image. This information may be sent over another channel, or a secondary channel. | 10-30-2008 |
20080267289 | Method And Device For Performing Interpolation In Scalable Video Coding - An interpolating method and a device for interpolating in grade video compression are disclosed. They apply mutual independent accurate interpolation filters to the luminance component and the chroma component, in which, their tap coefficients are mutual independent and the filters can be symmetric or not. And the interpolating result is used in interpolating in scalable video coding for a good effect. The increment of the compression efficiency and the reduction of the complexity can be realized. The interpolating method can be executed in the interpolating device. | 10-30-2008 |
20080273595 | APPARATUS AND RELATED METHOD FOR PROCESSING MACROBLOCK UNITS BY UTILIZING BUFFER DEVICES HAVING DIFFERENT DATA ACCESSING SPEEDS - A method for processing a plurality of macroblock units in a video image is disclosed. The method includes: performing a specific video processing operation upon at least a first macroblock unit; storing information of the first macroblock unit in a first buffer device; storing the information of the first macroblock unit read from the first buffer device into a second buffer device, wherein a data accessing speed of the second buffer device is faster than a data accessing speed of the first buffer device; and performing the specific video processing operation upon a second macroblock unit in the plurality of macroblock units according to the information of the first macroblock unit stored in the second buffer device. | 11-06-2008 |
20080285648 | Efficient Video Decoding Accelerator - The present invention relates to a decoding apparatus and method for decoding compressed video data having a plurality of video frames with a plurality of blocks, wherein the video frames are split in a first predetermined direction into at least two stripes whose width does not exceed a hardware prediction line size. Then, coefficient prediction is performed on one of the at least two stripes to provide a predictor in a second predetermined direction for at least one other of the at least two stripes, the second predetermined direction being perpendicular to the first predetermined direction. Additionally, fake blocks are generated to be inserted into the at least one other of said at least two stripes in order to initialize prediction in the second predetermined direction. Thereby, hardware accelerators with fixed processing width can be used in a more flexible manner. | 11-20-2008 |
20080291997 | Method of Encoding and Decoding Video Signals - Disclosed herein is a method of encoding video signals. The method includes creating a bit stream of a first layer by encoding the video signals, and creating a bit stream of a second layer by encoding the video signals based on the first layer. When residual data, corresponding to an image difference, within the first layer, is up-sampled and used for the encoding of the second layer, the residual data is up-sampled for each block that is predicted based on motion compensation. | 11-27-2008 |
20080291998 | VIDEO CODING APPARATUS, VIDEO CODING METHOD, AND VIDEO DECODING APPARATUS - The video coding apparatus of the present invention for reducing pulsing artifacts includes: a correlation calculation unit which calculates a correlation value indicating a correlation degree of correlation between: a first block; and a second block or a third block. The first block including pixels included in a first original picture in an original picture sequence of original pictures, the second block including pixels included in a second original picture which precedes the first original picture, and the third block being obtained by coding and reconstructing the second block. The video coding apparatus includes a correlation judgment unit which judges whether the correlation value exceeds a first threshold, and judge that the correlation is high when the correlation value exceeds the first threshold; and a blending unit which blends the first block and the third block when the correlation judgment unit judges that the correlation is high. | 11-27-2008 |
20080304565 | REDUCING THE NETWORK LOAD OF EVENT-TRIGGERED VIDEO - In one embodiment, a method for reducing the network load of an event-triggered video system comprising transmitting a first ‘play’ indication by a controlling process over a data network, to an appropriately configured video encoding process, transmitting first video data by the encoding process in response to receiving the first ‘play’ indication, the first video data being transmitted over the data network through a communication channel established over the data network between the encoding process and a recording process and receiving the first video data by the recording process. | 12-11-2008 |
20080304566 | Method for Decoding Video Signal Encoded Through Inter-Layer Prediction - A method for decoding a video signal encoded through inter-layer prediction is provided. When encoded bitstreams of first and second layers are received and decoded into a video signal, pictures of the first layer are predicted from pictures of the second layer. It is determined whether or not inter-layer prediction is constrained under the condition that a target block in the first layer has been coded in an intra mode through prediction from a picture of the second layer. An operation for checking a flag “intra_base_flag” indicating whether or not image data of the target block has been coded into difference data with reference to residual data, coded in an intra mode, of a corresponding block of a different layer is skipped if it is determined that inter-layer prediction is constrained. This eliminates the need for an encoder to transmit the flag under the same condition. | 12-11-2008 |
20080310506 | Joint Spatio-Temporal Prediction for Video Coding - Systems and methods are described for joint spatio-temporal prediction (JSTP) during video coding. A given block of pixels is simultaneously predicted via inter frame prediction and intra frame prediction. The joint spatio-temporal prediction provides a new JSTP coding mode besides inter and intra modes in coding schemata such as the H.264/AVC video coding standard. In one implementation, subband decomposition obtains a high-pass component of inter frame prediction of a block and a low-pass component of intra frame prediction of the same block. The high-pass component of the inter prediction and the low-pass component of the intra prediction are combined to produce the joint spatio-temporal prediction. In one implementation, a difference between the original block and the JSTP prediction is coded in a bitstream to represent the block. | 12-18-2008 |
20080310507 | ADAPTIVE CODING OF VIDEO BLOCK PREDICTION MODE - This disclosure describes techniques for coding of header information of video blocks. In particular, the techniques of this disclosure select one of a plurality of prediction modes for use in generating a prediction block of a video block of a coding unit, the plurality of prediction modes including unidirectional prediction modes and multi-directional prediction modes that combine at least two unidirectional prediction modes. An encoding device encodes the prediction mode of the current video block based on prediction modes of one or more previously encoded video blocks of the coding unit. Likewise, a decoding unit receives encoded video data of a video block of a coding unit and decodes the encoded video data to identify one of a plurality of prediction modes for use in generating a prediction block of the video block based on prediction modes of one or more previously decoded video blocks of the coding unit. | 12-18-2008 |
20080317125 | Bit Stream Recording Medium, Video Encoder, and Video Decoder - A conventional coding method has a problem that for frame-by-frame reverse playback, data must be once decoded in a forward direction and thus a larger volume of data must be processed and a larger volume of memory is required. | 12-25-2008 |
20080317126 | Methods and Apparatus For Parallel Implementations of 4:4:4 Coding - There are provided methods and apparatus for parallel implementations of 4:4:4 coding. A video encoder for encoding video signal data for an image block includes an encoder ( | 12-25-2008 |
20090010329 | Encoding Device, Encoding Method, and Computer Program for Encoding - A closed GOP is arranged at a plurality of positions in a video data string ( | 01-08-2009 |
20090010330 | Method and Apparatus for Adaptive Weight Selection for Motion Compensated Prediction - There are provided a method and apparatus for adaptive weight selection for motion compensated prediction. The apparatus includes an encoder for encoding a picture by deriving a set of weighting parameters, selecting at least one weighting parameter in the set based upon a selection criteria, and applying the selected at least one weighting parameter to a reference picture used to encode the picture. | 01-08-2009 |
20090010331 | Method and Apparatus for Decoding/Encoding a Video Signal - A method of decoding a video signal is disclosed. The present invention includes decoding a bit stream of a first layer, obtaining a flag information indicating whether inter-layer prediction is carried out on a current block of a second layer, obtaining at least one offset information indicating a position difference between an up-sampled picture of the first layer used for the inter-layer prediction and a current picture of the second layer based on the flag information, and up-sampling a reference picture of the first layer using at least the one offset information. | 01-08-2009 |
20090010332 | Method and Apparatus for Decoding/Encoding a Video Signal - A method of decoding a current layer using inter-layer prediction is disclosed. The present invention includes obtaining a first flag information indicating whether a current block of the current layer is coded using the inter-layer prediction, obtaining a quality identification information identifying a quality of the current block, obtaining a second flag information based on the first flag information and the quality identification information, the second flag information indicating whether a reference block is included in a specific slice of a reference layer, and decoding the current block based on the second flag information. | 01-08-2009 |
20090016434 | DEVICE AND METHOD FOR SCALABLY ENCODING AND DECODING AN IMAGE DATA STREAM, A SIGNAL, COMPUTER PROGRAM AND AN ADAPTATION MODULE FOR A CORRESPONDING IMAGE QUALITY - A method is provided for encoding a sequence of images generating a data stream in the form of a structure of embedded data layers of n successive levels each of which corresponds to the predetermined resolution of said images. Said method comprises an encoding stage, which encodes at least one of said layers of an n+1 level by prediction on the basis of said level n layer and encodes each data layer of the level n in the form of a base sub-stream and, optionally, in the form of at least one enhancement sub-stream enabling to obtain at least one version of the enhanced quality of said images. The method also encodes, for at least one data layer of the n level, at least one single sub-stream enabling to reconstruct the version of said images at said level n resolution with a quality higher than said enhanced qualities, wherein said single sub-steam of the level n layer is not used during the prediction encoding of the layers of a level other than the level n. | 01-15-2009 |
20090016435 | REPLACEMENT OF FRAME DATA IN A VIDEO STREAM SIGNAL - An apparatus processes a video stream signal. The video stream signal represents a succession of frames, comprising a plurality of dependent frames that each provide for prediction of visual content using selectable ones of a preceding and following anchor frame that precede and follow the plurality of frames respectively. When a shortage of transmission bandwidth occurs, the apparatus generates a processed version of the video stream signal wherein a bit-rate alteration is performed starting from one of the dependent frames before an end of said plurality. Said alteration is executed by substituting a standard prediction from the following anchor frame at least for data in the video stream signal that encodes a region in said one of the dependent frames. The bit rate alteration is accompanied by a switch to a mode in which the processing circuit substitutes a standard prediction from the following anchor frame in all following dependent frames that follow said one of the dependent frames until the following anchor frame, for data in the video stream signal that encodes the region in said following dependent frames. In an embodiment interlacing is killed for the replaced regions. | 01-15-2009 |
20090022220 | METHOD AND APPARATUS FOR ENHANCED VIDEO CODING - Standard video compression techniques apply motion-compensated prediction combined with transform coding of the prediction error. In the context of prediction with fractional-pel motion vector resolution it was shown, that aliasing components contained in an image signal are limiting the prediction efficiency obtained by motion compensation. In order to consider aliasing, quantization and motion estimation errors, camera noise, etc., we analytically developed a two dimensional (2D) non-separable interpolation filter, which is independently calculated for each frame by minimizing the prediction error energy. For every fractional-pel position to be interpolated, an individual set of 2D filter coefficients is determined. Since transmitting filter coefficients as side information results in an additional bit rate, which is almost constant for different image resolutions and total bit rates, the loss in coding gain increases when total bit rates sink. Therefore, we developed an algorithm, which regards the non-separable two-dimensional filter as a polyphase filter. For each frame, predicting the interpolation filter impulse response through evaluation of the polyphase filter, we only have to encode the prediction error of the filter coefficients. | 01-22-2009 |
20090022221 | METHOD FOR VIDEO LAYERED CODING, DEVICE FOR CODING AND DECODING IN INTERLACED MODE - A video layered coding or decoding method in an interlaced mode, including: dividing a frame of a current layer into fields after interlacing; determining a field in the current layer at the same time point as a frame in an upper layer according to a corresponding relation on a time axis; and predicting the frame in the upper layer through the corresponding field at the same time point, so as to realize inter-layer predictive coding or decoding. | 01-22-2009 |
20090022222 | METHOD AND DEVICE FOR MULTI-VIEW ENCODING/DECODING USING DISPARITY VECTOR - A method of obtaining a disparity vector and its encoding/decoding in the multi-view coding process is disclosed. The present invention includes essentially: determining a disparity vector between two views during the multi-view image coding, and computing a disparity vector between the other two views according to the disparity vector between the two views and the known relative location information between each of the views. Thereafter, the disparity vector is used for multi-view encoding/decoding. The present invention further makes use of the correlation between the disparity vector and depth information of the spatial vector on one hand, and on the other hand makes use of the direct relationship between the disparity vector and the location of each of the cameras. It is experimentally proved that the disparity vector between several views can be accurately computed during the multi-view coding, thereby improving the performance of multi-view coding. | 01-22-2009 |
20090028240 | Encoder, Decoder, Method for Encoding/Decoding, Computer Readable Media and Computer Program Elements - An encoder for encoding a first digital signal representative for a first channel and a second digital signal representative for a second channel is described. The encoder comprises cascaded intra-channel prediction elements for compressing the first digital signal and the second digital signal based on intra-channel correlation and an inter-channel prediction element for compressing the first digital signal and the second digital signal based on inter-channel correlation. | 01-29-2009 |
20090028241 | Device and method of coding moving image and device and method of decoding moving image - In the intra-screen predictive coding according to the H.264/AVC, adjacent encoded pixels are used to perform prediction of a target block, so that the prediction needs to be performed by referencing spatially-separate pixels. As such, the prediction accuracy is not always sufficient. | 01-29-2009 |
20090028242 | IMAGE DATA TRANSMITTING APPARATUS AND METHOD AND IMAGE DATA REPRODUCING APPARATUS AND METHOD - An image data transmitting apparatus and an image data transmitting method are provided which can distribute streaming moving images at a transfer rate in accordance with a transmission band with degradation in image quality being mitigated even at the time of congestion. A priority determining section | 01-29-2009 |
20090034615 | DECODING DEVICE AND DECODING METHOD - According to one embodiment, a decoding device, includes an input unit configured to input a moving image stream wherein each image is encoded in macro-blocks of n×n pixels to be generated by being divided in a matrix shape, a detection unit configured to analyze information of a slice composed of more than one macro-block included in the moving image stream input from the input unit and detects inter-macro-blocks in the slice, two or more decoding units configured to decode the moving image stream in macro-blocks, and a control unit configured to make the decoding unit decode intra-macro-blocks in the slice after making the two or more decoding units decode in parallel the inter-macro-blocks in the slice detected by the detection unit. | 02-05-2009 |
20090034616 | PICTURE CODING METHOD AND PICTURE DECODING METHOD - The method includes the following units: a coefficient number detecting unit ( | 02-05-2009 |
20090041120 | Luma and Chroma Encoding Using a Common Predictor - There are provided video encoders, video decoders, and corresponding methods. A video encoder for encoding video signal data for an image block includes an encoder for encoding all color components of the video signal data using a common predictor. A video decoder for decoding video signal data for an image block includes a decoder for decoding all color components of the video signal data using a common predictor. Additionally, an apparatus and method for encoding and decoding signal data for an image block includes an encoder and decoder for encoding/decoding color components of the video signal data without applying a residual color transform thereto. Furthermore, a video encoder and decoder for encoding/decoding video signal data for an image block includes an encoder and decoder for encoding/decoding the video signal data using unique predictors for each of color components of the video signal data. | 02-12-2009 |
20090041121 | Method and apparatus for encoding video data, and method and apparatus for decoding video data - Scalable video coding based on H.264/AVC uses motion compensation, which results in motion vectors and residual pictures. To optimize the encoding of the residual pictures of the enhancement-layer, they can be predicted from the base-layer. This requires complex encoders and decoders. Simplified residual prediction techniques are provided that focus on reducing the encoding and decoding complexity of the spatial scalable enhancement-layer with optimized coding efficiency. The method for encoding video data containing high-pass frames and low-pass frames comprises the steps of encoding the low-pass frames, wherein residual prediction may be used, splitting the high-pass frames into two interleaving frame groups, encoding the frames of the first of said frame groups, wherein residual prediction may be used, and encoding the frames of the second of the frame groups using an encoding method without residual prediction. | 02-12-2009 |
20090041122 | IMAGE CODING APPARATUS, IMAGE CODING METHOD AND IMAGE CODING PROGRAM - The image coding apparatus is provided to realize image coding with little calculation quantity and through rate distortion optimization thereby maintaining a favorable image quality. The image coding apparatus includes a processing unit that conducts frequency transform and quantization on a block in a predetermined manner for a plurality of coding modes, each mode having a different coding process, a cost calculating unit that calculates a predictive coded quantity and coding distortion in a coding mode using a result of the quantization conducted by the processing unit and a residue to obtain a cost regarding the coding mode, a minimum coding cost selecting unit that selects a minimum coding cost among the coding costs calculated for respective coding modes, and a coding unit that conducts coding on the blocks in a coding mode associated with the minimum coding cost selected by the minimum coding cost selecting unit. | 02-12-2009 |
20090046781 | MOVING IMAGE CODING APPARATUS AND MOVING IMAGE DECODING APPARATUS - A macro block size determining unit | 02-19-2009 |
20090052528 | Method and Apparatus for Encoding/Decoding Video Signal Using Block Prediction Information - This invention relates to a method and apparatus for encoding video signals using prediction information of an intra mode block of a sub-layer and decoding the encoded video data accordingly. The method encodes a video signal in a scalable MCTF scheme to output a bit stream of an enhanced layer, and simultaneously encodes the video signal using a pre-determined method to output a bit stream of a base layer. When the video signal is encoded in the MCTF schemes, an image block included in an arbitrary frame of the video signal is coded as an intra mode using pixels adjacent to the image block, in the basis of prediction information of the corresponding block coded as the intra mode, the corresponding block being included in a bit stream of the base layer and corresponding to the image block. | 02-26-2009 |
20090052529 | Method and Apparatus for Providing Reduced Resolution Update Mode for Multi-View Video Coding - There are provided a method and apparatus for illumination and color compensation for multi-view video coding. A video encoder includes an encoder ( | 02-26-2009 |
20090052530 | IMAGE DATA COMPRESSION DEVICE, COMPRESSING METHOD, IMAGE DATA DECOMPRESSION DEVICE, DECOMPRESSING METHOD, AND RECORDING MEDIUM - A quantizer quantizes a “prediction error” as a difference value between a pixel X to be compressed and a prediction value X′. A variable-length encoder inputs a quantization number obtained from a quantization table of the quantizer, and outputs a variable-length code (compressed code). A prediction value candidate calculation module calculates candidates 1 through k for a prediction value on the basis of peripheral pixels A, C, and B, and transmits them to a multiplexer (MPX). A prediction value determination module determines a prediction value among the candidates 1 through k for a prediction value on the basis of an intermediate value correspondence table and an intermediate value—image format correspondence table depending on an image format, and transmits a control signal to the multiplexer (MPX). The multiplexer (MPX) outputs one of the candidates 1 through k for a prediction value as a prediction value X′. | 02-26-2009 |
20090052531 | VIDEO CODING - A video encoder using inter-frame differential coding has a store ( | 02-26-2009 |
20090060034 | Method and apparatus for scalably encoding and decoding video signal - In one embodiment, the method includes predicting at least a portion of a current image in a current layer based on at least a residual coded portion of a base image in a base layer, a reference image, shift information for samples in the predicted current image, and offset information indicating a position offset between at least one boundary pixel of the reference image and at least one boundary pixel of the current image. The residual coded portion represents difference pixel data. | 03-05-2009 |
20090060035 | TEMPORAL SCALABILITY FOR LOW DELAY SCALABLE VIDEO CODING - A method of processing video information which includes receiving encoded video information including an encoded base layer frame and encoded enhanced layer frames for providing temporal scalability, decoding the encoded video information in display order, and using a decoded first enhanced layer frame as a reference frame for decoding a second enhanced layer frame for forward prediction. Processing the video information in display order and using a decoded enhanced layer frame as a reference frame for processing another enhanced layer frame for forward prediction reduces coding latency for achieving temporal scalability for low delay scalable video coding. The coding memory space may also be reduced as compared to bidirectional prediction coding since the number of reference frames used for coding may be reduced. | 03-05-2009 |
20090060036 | Coding Apparatus, Coding Method, Decoding Apparatus, and Decoding Method - A coding apparatus includes: a storage section that stores information for coding an image area to be currently coded in a direct prediction mode that predicts motion information of an image area to be coded by referring to motion information of a previously coded image area; a deriving section that derives motion information of the image area in the direct prediction mode by referring to the information stored in the storage section; a selecting section that selects a prediction mode for coding the image area to be coded, in accordance with the motion information derived by the deriving section; and a determining section that determines information necessary for the deriving section to derive motion information of an uncoded image area, from coding information applied in the prediction mode selected by the selecting section to the image area to be coded, and stores only information determined necessary into the storage section. | 03-05-2009 |
20090060037 | METHOD AND SYSTEM FOR DETERMINING PREDICTION MODE PARAMETER - For determining a prediction mode parameter, a macroblock of an image is divided into a plurality of blocks; most prediction mode parameters corresponding to a plurality of first blocks along a left most edge of the macroblock are determined; most prediction mode parameters corresponding to a plurality of second blocks along a top most edge of the macroblock are determined; and the most prediction mode parameters of the first and second blocks are stored into a buffer allocated with designated position for the plurality of blocks. | 03-05-2009 |
20090060038 | Encoding device and encoding method and decoding device and decoding method - An encoding device including a calculation result storage unit adapted to store information based on a result of a difference calculation of the differential encoding along with information on a referenced picture used for the differential calculation a determination unit determining from the information on the referenced picture stored in the calculation result storage unit whether the difference calculation has been performed on the picture to be referred used for the difference calculation of a picture which undergoes the image compression, as a reference target of the difference calculation and a differential encoding unit reading from the calculation result storage unit the information on the result of the difference calculation corresponding to the picture to be referred and performs the differential encoding based on a determination by the determination unit that the difference calculation has been performed, as the reference target, on the picture to be referred. | 03-05-2009 |
20090067495 | RATE DISTORTION OPTIMIZATION FOR INTER MODE GENERATION FOR ERROR RESILIENT VIDEO CODING - Optimal selection of an inter mode is provided for video data being encoded to achieve enhanced error resilience when the video data is decoded. End to end distortion cost from encoder to decoder for inter mode selection is determined based on residue energy and quantization error. Using the distortion cost function based on residue energy and quantization error, and an optimal Lagrangian parameter, the optimal inter mode is selected for use during encoding for maximum error resilience. The optimal Lagrangian parameter can be set to be proportional to an error-free Lagrangian parameter with a scale factor determined by packet loss rate. | 03-12-2009 |
20090074060 | Method, medium, and apparatus for encoding and/or decoding video - A method, medium, and apparatus for encoding and/or decoding video by generating a scalable bitstream formed of a base layer bitstream and an enhancement layer bitstream so as to have forward compatibility, wherein the enhancement layer bitstream comprises a bit-depth field of the enhancement layer, a frame or a picture type field of the enhancement layer in consideration of a frame or a picture type of the base layer, an additional quantization information field for obtaining a quantization parameter of the enhancement layer together with a quantization parameter of the base layer, an intra-macroblock field of the enhancement layer, and an inter-macroblock field of the enhancement layer. | 03-19-2009 |
20090080520 | VIDEO DECODING APPARATUS AND VIDEO DECODING METHOD - According to one embodiment, a video decoding apparatus includes a decoding module configured to decode syntax values of respective macroblocks included in a picture to be decoded in the video stream, an error detection module configured to detect an error in the syntax values decoded by the decoding module, and an error concealment processing module configured to execute, in the case where the picture to be decoded whose error has been detected by the error detection module is an intra-frame prediction picture for which motion compensation prediction processing is not performed, error concealment processing of rewriting the syntax values of the macroblock in which an error has been detected and subsequent macroblocks so as to estimate, from information of the intra-frame prediction picture or data of macroblocks that have been decoded, data of the macroblock in which an error has been detected and subsequent macroblocks. | 03-26-2009 |
20090080521 | VIDEO FRAME ENCODING AND DECODING - A video frame arithmetical context adaptive encoding and decoding scheme is presented which is based on the finding, that, for sake of a better definition of neighborhood between blocks of picture samples, i.e. the neighboring block which the syntax element to be coded or decoded relates to and the current block based on the attribute of which the assignment of a context model is conducted, and when the neighboring block lies beyond the borders or circumference of the current macroblock containing the current block, it is important to make the determination of the macroblock containing the neighboring block dependent upon as to whether the current macroblock pair region containing the current block is of a first or a second distribution type, i.e., frame or field coded. | 03-26-2009 |
20090086817 | IMAGE ENCODING APPARATUS AND IMAGE ENCODING METHOD - An image capturing apparatus | 04-02-2009 |
20090086818 | FRAME BUFFER MEMORY OPERATING METHOD USED TO DECOMPRESS COMPRESSED MOVING PICTURES, AND DECODING APPARATUS ADAPTED TO FRAME BUFFER MEMORY OPERATING METHOD - Provided are a buffer memory operating method used to decompress compressed moving pictures, in which a buffer memory used during decompression of compressed moving picture is efficiently operated to efficiently reduce the capacity of an actually used buffer memory, and a decoding apparatus adapted to the buffer memory operating method. The frame buffer memory operating method includes the operations of decoding a current input I frame and storing the decoded current I frame in a standby buffer and converting the standby buffer having the decoded current I frame into a storage buffer and simultaneously converting a storage buffer having a previous I frame into another standby buffer; and decoding a current input P frame with reference to the decoded current I frame stored in the storage buffer, storing the decoded current P frame in one of the standby buffers, and converting the standby buffer having the current P frame to the other standby buffer. | 04-02-2009 |
20090092187 | Luma and Chroma Decoding Using a Common Predictor - There are provided video encoders, video decoders, and corresponding methods. A video encoder for encoding video signal data for an image block includes an encoder for encoding all color components of the video signal data using a common predictor. A video decoder for decoding video signal data for an image block includes a decoder for decoding all color components of the video signal data using a common predictor. Additionally, an apparatus and method for encoding and decoding signal data for an image block includes an encoder and decoder for encoding/decoding color components of the video signal data without applying a residual color transform thereto. Furthermore, a video encoder and decoder for encoding/decoding video signal data for an image block includes an encoder and decoder for encoding/decoding the video signal data using unique predictors for each of color components of the video signal data. | 04-09-2009 |
20090097555 | Video encoding method and device - Successive images (F) of a video sequence are encoded in order in generate parameters which are included in an output flow (F) that is to be transmitted to a decoder. The encoding of certain images is effected in Inter mode relative to one or several previous images of the sequence. The output flow also includes long term marking commands for certain images and demarking commands for previously marked images. Each long-term marked image is kept in a memory by the decoder until a corresponding demarking command is received. Return information on the restoration of the images of the video sequence by the decoder is received by the encoder (1) and analyzed in order to identify an image that has been lost by the decoder. It is possible to encode a following image of the sequence in Inter mode in relation to a long-term marked image in response to identification of an image lost to the decoder. | 04-16-2009 |
20090097556 | Encoding Apparatus, Encoding Method, Program for Encoding Method, and Recording Medium Having Program for Encoding Method Recorded Thereon - An encoding apparatus for generating, in an intra prediction mode, difference data by subtracting prediction values from input image data, and performing encoding processing on the input image data by processing the difference data. The apparatus includes a first prediction mode detecting section for detecting a first best prediction mode, a second prediction mode detecting section for detecting a second best prediction mode, and a prediction value generating section for selecting a best prediction mode. The first prediction mode detecting section detects the first best prediction mode by utilizing processing in the second prediction mode detecting section. | 04-16-2009 |
20090097557 | Image Encoding Apparatus, Image Encoding Method, Image Decoding Apparatus, and Image Decoding Method - The present invention provides an image encoding/decoding technique that is capable of achieving the higher compression efficiency. An image encoding method comprises: an intra prediction step which performs intra prediction on a block basis to generate a predicted image; a subtraction step which calculates the difference in prediction between the predicted image generated by the intra prediction step and an original image; a frequency conversion step which performs frequency conversion processing for the difference in prediction; a quantization step which subjects the output of the frequency conversion step to quantization processing; and a variable-length encoding step which subjects the output of the quantization step to variable-length encoding processing; wherein the intra prediction encoding step predicts a target pixel to be encoded by use of pixel values of two reference pixels between which the target pixel to be encoded is located. | 04-16-2009 |
20090103613 | Method for Decoding Video Signal Encoded Using Inter-Layer Prediction - A method for receiving and decoding an encoded bitstream of a first layer and an encoded bitstream of a second layer into a video signal is provided. It is determined whether or not a block temporally coincident with a target block in a picture of the first layer is present in the bitstream of the second layer. An operation for checking information (intra_base_flag and residual_pediction_flag) indicating whether or not the target block has been predicted based on data of a block in a different layer corresponding to the target block is skipped if no block temporally coincident with the target block is present in the bitstream of the second layer. This method eliminates the need for encoders to transmit unnecessary information (intra_base_flag and residual_prediction_flag) when performing inter-layer prediction using a temporally adjacent frame. | 04-23-2009 |
20090103614 | Picture coding method and picture decoding method - A picture coding apparatus ( | 04-23-2009 |
20090103615 | Simplified Inter-layer Motion Prediction for Scalable Video Coding - The invention relates to a method for determining for a high layer macroblock that uses inter-layer prediction a partitioning of the macroblock in partitions. It comprises the following steps: —dividing the high layer macroblock in non-overlapping high layer blocks of a predefined size; —determining a corresponding base layer pixel for one pixel, called reference pixel, of each high layer block; —identifying, for each reference pixel, a base layer macroblock to which the corresponding base layer pixel belongs, a base layer partition to which the corresponding base layer pixel belongs in the identified base layer macroblock, a base layer sub-partition to which the corresponding base layer pixel belongs in the identified base layer partition if the sub-partition exists; —deriving, for each of the high layer block, a single value, called Part Info value; and —determining a partitioning of the high layer macroblock in macroblock partitions by comparing between them the Part Info values associated with each of the high layer blocks. | 04-23-2009 |
20090103616 | METHOD AND DEVICE FOR GENERATING DEPTH IMAGE USING REFERENCE IMAGE, METHOD FOR ENCODING/DECODING DEPTH IMAGE, ENCODER OR DECODER FOR THE SAME, AND RECORDING MEDIUM RECORDING IMAGE GENERATED USING THE METHOD - The present invention relates to a method and device for generating a depth image, a method for encoding/decoding the depth image, an encoder/decoder for the same, and a recording medium recording an image generated by the method, which are related to a depth image encoding method that can effectively reduce a bit generation rate using a reference image obtained by at least one camera and improve encoding efficiency. A depth image generating method according to an embodiment of the invention includes a step (a) of obtaining a depth image at a viewpoint and setting the obtained depth image to a reference image; a step (b) of applying a 3D warphing method to the reference image and predicting and generating a depth image at a specific viewpoint; and a step (c) of removing a hole that exists in the predicted and generated depth image. | 04-23-2009 |
20090110066 | Method and Apparatus for Selecting a Coding Mode - A method and apparatus for selecting a coding mode for a block of a current picture are disclosed. For example, the method selects a coding mode in accordance with a cost function, for coding the block, wherein the cost function comprises a coding distortion parameter and a number of coding bits parameter, wherein said coding distortion parameter is measured in accordance with at least one of: between a prediction residual and a reconstructed prediction residual, or between a transformed prediction residual and a dequantized transformed prediction residual, wherein the number of coding bits parameter is computed in accordance with at least one of: from a true number of compressed bits resulting from coding said block, directly from a plurality of bins, or directly from a plurality of quantized transform coefficients. | 04-30-2009 |
20090110067 | IMAGE ENCODING DEVICE, IMAGE DECODING DEVICE, IMAGE ENCODING METHOD AND IMAGE DECODING METHOD - An encoding device includes a color component separating unit for separating an input bit stream for the respective color components, a block dividing unit for dividing an input color component signal into blocks to generate a signal of an encoding unit area, a predicted image generating unit for generating a predicted image for the signal, a determining unit for determining a prediction mode used for encoding according to a prediction efficiency of the predicted image, a prediction error encoding unit for encoding a difference between the predicted image corresponding to the prediction mode determined by the determining unit and the input color component signal, and an encoding unit for variable length-coding the prediction mode, an output from the prediction error encoding unit, and a color component identification flag indicating the color component to which the input bit stream belongs as a result of the color component separation. | 04-30-2009 |
20090110068 | Coding Apparatus, Coding Method, Decoding Apparatus, Decoding Method, and Program - A coding apparatus for hierarchically (layering) coding top field data and bottom field data divided from each of a plurality of picture data composing a moving picture image has a first coding unit ( | 04-30-2009 |
20090110069 | Method and apparatus encoding and/or decoding image by using diffusion properties of the image - Provided are a method and apparatus for encoding/decoding a moving picture by using the diffusion properties of the image. In the method, a value of a current pixel is predicted from the values of neighboring pixels of the current pixel, based on the variations between the values of the neighboring pixels present in directions toward the current pixel; a correction value of the predicted value is calculated from at least one variation from among the variations; the value of the current pixel is determined by reflecting the correction value into the predicted value; and then, the original image is reconstructed using the determined value of the current pixel. | 04-30-2009 |
20090110070 | IMAGE ENCODING DEVICE AND ENCODING METHOD, AND IMAGE DECODING DEVICE AND DECODING METHOD - In an image encoding/decoding device of the present invention, the prediction direction in a target block, i.e., a block which becomes the target of the intra-frame prediction processing, is estimated by taking advantage of pre-encoded blocks which are adjacent to the target block. First, as edge information on decoded images on the adjacent blocks, intensities and angles of the edges are calculated. Next, of the degrees of likelihood calculated with respect to each prediction direction by taking advantage of this edge information and, e.g., a neural network, the prediction direction whose degree of likelihood is the highest is employed as the prediction direction in the target block. Also, a variable-length code table is dynamically created based on the estimated result, which allows a significant reduction in the prediction-direction representing code amount. | 04-30-2009 |
20090110071 | VIDEO ENCODING/ DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination. | 04-30-2009 |
20090110072 | MOVING PICTURE PREDICTION METHOD, MOVING PICTURE CODING METHOD AND APPARATUS, AND MOVING PICTURE DECODING METHOD AND APPARATUS - A moving picture prediction method for enabling a calculation amount and a storage capacity to be reduced in a prediction about a moving picture by scaling processing is provided. A method for predicting the value P of Time T from the value P | 04-30-2009 |
20090122863 | Video transcoding techniques for gaming networks, and gaming networks incorporating the same - The exemplary embodiments described herein relate to light-weight video transcoding techniques for allowing media (e.g., audiovisual content that may be pre-recorded media and/or live media provided in substantially real-time) to one or more peripherals (e.g., gaming devices, overhead displays, etc.) attached to gaming networks. In certain exemplary embodiments, video data to be distributed is received from a video server. The video data is decompressed into raw video data. The raw video data is stripped down by discarding at least some component data of the raw video data and at least some lower bits of the raw video data. A predictor algorithm is run on the stripped-down raw video data. Recompressed data to be sent to one or more peripherals is generated based on output of the predictor algorithm in accordance with a compression algorithm. The recompressed data may be received at at least one peripheral, the recompressed data may be decompressed, and existing component data may be substituted for the discarded component data. | 05-14-2009 |
20090122864 | MOVING PICTURE CODING METHOD, MOVING PICTURE DECODING METHOD, AND APPARATUSES OF THE SAME - A moving picture coding method according to the present invention is a moving picture coding method for coding a moving picture which includes pictures, the method including: partitioning a picture into blocks each of which includes pixels; selecting a scanning scheme from among plural scanning schemes; scanning the blocks according to the selected scanning scheme; and coding the blocks in an order in which the blocks are scanned. In doing so, in the partitioning, the picture is partitioned into rows and columns of macroblocks each of which is partitioned into the blocks. The plural scanning schemes include a first scanning scheme for scanning the blocks in the macroblock per row of blocks. | 05-14-2009 |
20090122865 | METHOD AND DEVICE FOR CODING A SCALABLE VIDEO STREAM, A DATA STREAM, AND AN ASSOCIATED DECODING METHOD AND DEVICE - A video sequence is coded in the form of a base level and an refinement level. A group of pictures of the base level comprises intra coded or mono-predicted end images (I,P) and bi-predicted images (B | 05-14-2009 |
20090129467 | Method for Encoding at Least One Digital Picture, Encoder, Computer Program Product - A method for encoding at least one digital picture is described, wherein a first representation of the picture is generated, a second representation of the picture is generated and a third representation of the picture is generated from the first representation of the picture and the second representation of the picture by predicting the coding information of the picture elements of the picture using the first representation of the picture and the second representation of the picture. | 05-21-2009 |
20090135905 | PROTECTING COMMERCIALS WITHIN ENCODED VIDEO CONTENT - In one embodiment, a method comprises identifying an identifiable video object from a video picture of a digital video having video content and commercial content, the video picture contained within the video content; encoding the identifiable video object as a video overlay object; encoding the commercial content based on generating a first key frame, and storing the video overlay object within the first key frame as an object that is not displayed as part of the commercial content; and encoding the video picture based on generating a second key frame that includes a default video object in place of the identifiable video object, the default video object including an overlay reference to the video overlay object within the first key frame, wherein unavailability of the video overlay object during rendering of the second key frame causes display of the default video object to visually corrupt the video picture. | 05-28-2009 |
20090135906 | Method and Apparatus for Transmitting Multiple Video Streams Over a Video Channel - There are provided methods and apparatus for transmitting multiple video streams over a video channel. A video encoder is provided for encoding a plurality of streams corresponding to a plurality of programs. The video encoder includes an encoder ( | 05-28-2009 |
20090135907 | VIDEO ENCODING/ DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination. | 05-28-2009 |
20090135908 | VIDEO FRAME ENCODING AND DECODING - A video frame arithmetical context adaptive encoding and decoding scheme is presented which is based on the finding, that, for sake of a better definition of neighborhood between blocks of picture samples, i.e. the neighboring block which the syntax element to be coded or decoded relates to and the current block based on the attribute of which the assignment of a context model is conducted, and when the neighboring block lies beyond the borders or circumference of the current macroblock containing the current block, it is important to make the determination of the macroblock containing the neighboring block dependent upon as to whether the current macroblock pair region containing the current block is of a first or a second distribution type, i.e., frame or field coded. | 05-28-2009 |
20090141798 | Image Decoding Apparatus and Image Decoding Method - An image decoding apparatus and an image decoding method capable of generating a decoded image even in the case where a pixel in a block is necessary as a reference pixel, the block where an intra prediction mode specified in a stream is unavailable according to a standard, due to a transmission error, a coding-method error, or the like. An image decoding apparatus ( | 06-04-2009 |
20090141799 | Method of Processing a Signal and Apparatus for Processing a Signal - A method and apparatus for processing a signal compressed in accordance with a specific alternative coding scheme are disclosed. In detail, a coding method for signal compression and signal restoration using a specific alternative coding scheme, and an apparatus therefor are disclosed. Data coding and entropy coding according to the present invention are executed under the condition in which they have a co-relation with each other. The method for signal processing includes obtaining a pilot reference value corresponding to a plurality of data and a pilot difference value corresponding to the pilot reference value, and obtaining the data using the pilot reference value and the pilot difference value. | 06-04-2009 |
20090141800 | Transmitting Video Streams - Systems, methods, and devices for transmitting video streams are described herein. One method of transmitting video streams includes coordinating transmission of intra-frames in a first video stream with transmission of intra-frames in a second video stream. The method further includes transmitting I-frames in the first and second video streams such that the I-frames do not overlap in the first and second video streams. | 06-04-2009 |
20090141801 | VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination. | 06-04-2009 |
20090147846 | SCALABLE PREDICTIVE CODING METHOD AND APPARATUS - A scalable predictive coder in which the current frame of data is predicted at the enhancement-layer by processing and combining the reconstructed signal at: (i) the current base-layer (or lower layers) frame; and (ii) the previous enhancement-layer frame. The combining rule takes into account the compressed prediction error of the base-layer, and the parameters used for its compression. | 06-11-2009 |
20090161759 | METHOD AND APPARATUS FOR VIDEO CODING ON PIXEL-WISE PREDICTION - Provided is a video encoding and decoding method and apparatus using pixel-based prediction. A pixel-based video encoding apparatus includes a block prediction unit, a residual image generation unit, a pixel prediction unit, and an entropy-coding unit. The block prediction unit performs temporal or spatial prediction between a reference image and a current image in order to generate a prediction block corresponding to a current block to be encoded. The residual image generation unit generates a residual image block composed of a residual signal corresponding to a difference between pixels of the prediction block and pixels of the current block. The pixel prediction unit determines whether to apply differential pulse coded modulation (DPCM) to each of pixels of the residual image block based on a rate distortion optimization (RDO) value calculated for the case where DPCM is applied to each of the pixels of the residual image block and a RDO value calculated for the case where DPCM is not applied to each of the pixels of the residual image block. The entropy-coding unit performs entropy-coding on the residual image block. | 06-25-2009 |
20090168872 | Method and Apparatus for Encoding/Decoding Video Signal Using Block Prediction Information - This invention relates to a method and apparatus for encoding video signals based on prediction information of an intra mode block of a sub-layer and decoding the encoded video data accordingly. The method encodes a video signal in a scalable MCTF scheme to output a bit stream of an enhanced layer, and simultaneously encodes the video signal using a pre-determined method to output a bit stream of a base layer. When the video signal is encoded in the MCTF scheme, an image block included in an arbitrary frame of the video signal is coded to be an error value using the uncoded value of pixels adjacent to the image block, on the basis of prediction information of the corresponding block coded as an intra mode, the corresponding block being included in a bit stream of the base layer and corresponding to the image block, and a bit stream including the coded image block is transmitted while constraint information being released. | 07-02-2009 |
20090168873 | Method for Modeling Coding Information of a Video Signal for Compressing/Decompressing Coding Information - A method for context-modeling coding information of a video signal for compressing or decompressing the coding information is provided. An initial value of a function for probability coding of coding information of a video signal of an enhanced layer is determined based on coding information of a video signal of a base layer. | 07-02-2009 |
20090168874 | Methods and Apparatus for Multi-View Video Coding - There are provided methods and apparatus for multi-view video coding. A video encoder includes an encoder for encoding a block in a picture by choosing between temporal prediction and cross-view prediction to enable a prediction for the block. The picture is one of a set of pictures corresponding to multi-view video content and having different view points with respect to a same or similar scene. The picture represents one of the different view points. A high-level syntax is used to indicate the use of cross-view prediction for the block. | 07-02-2009 |
20090168875 | Inter-Layer Prediction Method for Video Signal - The present invention relates to a method for using interlaced video signal of a base layer in interlayer texture prediction. The present method constructs a pair of frame macro blocks from vertically-adjacent two field macro blocks pertaining to interlaced video signal of a base layer, separates video signal containing the pair of frame macro blocks into even-field and odd-field components, interpolates the even- field and the odd- field components respectively in vertical and/or horizontal direction, and constructs a combined video data by interleaving the interpolated even-field and odd-field components. | 07-02-2009 |
20090168876 | VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination. | 07-02-2009 |
20090168877 | VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination. | 07-02-2009 |
20090175333 | METHOD AND APPARATUS FOR HIGHLY SCALABLE INTRAFRAME VIDEO CODING - An apparatus and method is provided for highly scalable intraframe video coding. The conventional macroblock DCT tools are integrated with the subband filter banks for the improved efficiency of scalable compression. The enhancement layers are represented in a subband domain and coded by an inter-layer frame texture coder utilizing inter-layer prediction signal formed by the decoded previous layer. Each quality enhancement layer is additionally scalable in resolution. | 07-09-2009 |
20090175334 | ADAPTIVE CODING OF VIDEO BLOCK HEADER INFORMATION - This disclosure describes techniques for adaptively coding video block header information based on previously encoded video blocks. A video encoder may adaptively select a coding table for use in encoding a syntax element of a current video block based on corresponding syntax elements of one or more previously encoded blocks. In one aspect, the video encoder may adaptively select the coding table for use in encoding a block type of the current block based on block types of one or more video blocks adjacent to the current video block, i.e., neighboring video blocks. The video encoder may also predict one or more other header syntax elements of the current block based on at least one of the previously encoded video blocks. If prediction is successful, the video encoder may encode a flag to indicate the success of prediction. | 07-09-2009 |
20090175335 | Digital Watermarking Method - The invention relates to a method of watermarking a binary stream resulting from the encoding of a set of coefficients comprising at least one coefficient encoded by predictive coding, called predictively coded coefficient. The method comprises the steps of:
| 07-09-2009 |
20090175336 | VIDEO CODING OF FILTER COEFFICIENTS BASED ON HORIZONTAL AND VERTICAL SYMMETRY - This disclosure recognizes and exploits the fact that some of the filter coefficients defined at the encoder may possess symmetry relative to other filter coefficients. Accordingly, this disclosure describes techniques in which a first set of the filter coefficients are used to predictively encode a second set of the filter coefficients, thereby exploiting any symmetry between filter coefficients. Rather than communicate all of the filter coefficients to the decoding device, the encoding device may communicate the first set of filter coefficients and difference values associated with the second set of filter coefficients. Using this information, the decoder may be able to reconstruct all of the filter coefficients. In some cases, if exact symmetry is imposed, the need to send the difference values may be eliminated and the decoder may be able to derive the second set of filter coefficients from the first set of filter coefficients. | 07-09-2009 |
20090175337 | Method of decoding a macroblock based on a macroblock level of the macroblock - In one embodiment, the method includes obtaining a first reference frame picture list and a second reference frame picture list including multiple reference frame pictures respectively. A reference frame picture index is determined based on display order information for the multiple reference frame pictures. The method further includes obtaining first motion vector information and second motion vector information for the macroblock and obtaining a first reference field picture index and a second reference field picture index associated with the macroblock. A first reference frame picture and a second reference frame picture are determined. The method further includes selecting first and second reference field pictures for the macroblock. The macroblock is decoded based on the first and second motion vector information and the selected first and second reference field pictures. | 07-09-2009 |
20090190659 | VIDEO ENCODING METHOD AND APPARATUS, AND VIDEO DECODING METHOD AND APPARATUS - A video encoding method and apparatus, and a video decoding method and apparatus, which are capable of improving efficiency of encoding a luminance component video signal by predicting information on various encoding modes of the luminance component video signal by using a result obtained by encoding a chrominance component video signal, are provided. Accordingly, a block mode and an intra-prediction mode of the luminance component video signal are predicted from a previously encoded and recovered chrominance component video signal, and the predicted block mode and the predicted intra-prediction mode are used to encode the luminance component video signal. | 07-30-2009 |
20090196349 | METHOD FOR ESTIMATING CONTOUR OF VIDEO OBJECT - A method for estimating a boundary between a background and a user object in a video, in which the user object is segmented from the background is provided. The initial object contour is estimated in a first video frame for object segmentation, and color probability density functions are estimated for the user object and the background segmented from the first video frame. An edge strip with a predetermined width is generated in a current frame based on an object contour of a previous frame, and a coherence probability density function of the edge strip is estimated. The user object is segmented in the current frame by energy minimization. | 08-06-2009 |
20090196350 | METHODS AND DEVICES OF INTRA PREDICTION ENCODING AND DECODING - Methods and devices of intra prediction encoding and decoding are described, so that the encoding performance of intra coding is better. A prediction encoding is performed on the same frame by using at least two intra prediction encoding modes, and information indicating the intra prediction encoding mode of each block is written into the encoded result, so as to encode different blocks by using the most appropriate modes. By using at least two intra prediction encoding modes, relevant indication information is written into the encoded result, so as to correctly perform the decoding. During decoding, the information of intra prediction encoding mode of each block of the same frame is firstly read, and then the block is decoded by using this mode. Each block is organized in a form of hierarchical tree, so as to obtain the optimal performance, and reduce the amount of the information indicating the intra prediction encoding mode of each block in the encoded result. | 08-06-2009 |
20090201990 | METHOD AND DEVICE FOR REORDERING AND MULTIPLEXING MULTIMEDIA PACKETS FROM MULTIMEDIA STREAMS PERTAINING TO INTERRELATED SESSIONS - A method for reordering and multiplexing multimedia packets from multimedia data streams (S | 08-13-2009 |
20090207912 | Reducing key picture popping effects in video - Techniques and tools are described for reducing key picture popping effects. In some embodiments, an encoding system filters a video picture that is to be encoded as a key picture using intra-picture compression. The filtering reduces detail in the picture relative to other video pictures that are to be encoded using inter-picture compression. In many cases, the filtering reduces key picture popping effects by selectively attenuating detail in the picture that is to be encoded as a key picture. The encoding tool can use a key picture filter strength parameter to control strength of the filtering. The tool encodes the filtered video picture using intra-picture compression and encodes the other video pictures using inter-picture compression. | 08-20-2009 |
20090207913 | METHOD AND APPARATUS FOR ENCODING AND DECODING IMAGE - Provided are methods and apparatuses for encoding an image and methods and apparatuses for decoding an image. The methods and apparatuses generate a compensated prediction block by compensating a prediction block of a current block by using a predetermined compensation value and encode a residual value that is a difference between the compensated prediction block and an input current block. | 08-20-2009 |
20090213931 | VIDEO ENCODING/ DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination. | 08-27-2009 |
20090219995 | VIDEO ENCODING/ DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination. | 09-03-2009 |
20090219996 | VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination. | 09-03-2009 |
20090219997 | VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination. | 09-03-2009 |
20090219998 | VIDEO ENCODING/ DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination. | 09-03-2009 |
20090219999 | VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination. | 09-03-2009 |
20090232206 | IMAGE PREDICTION ENCODING DEVICE, IMAGE PREDICTION DECODING DEVICE, IMAGE PREDICTION ENCODING METHOD, IMAGE PREDICTION DECODING METHOD, IMAGE PREDICTION ENCODING PROGRAM, AND IMAGE PREDICTION DECODING PROGRAM - An image predictive encoding device including an intra frame predictive signal generation method determination section that determines, for adjacent areas including regenerated pixel signals and adjacent to the target area, a predictive method derived on the basis of data corresponding to the adjacent areas as an R mode predictive method or an L mode predictive method, an intra frame predictive signal generation section that generates an intra frame predictive signal on the basis of the R mode predictive method thus determined, and a subtractor, a transform section, a quantization section, and an entropy encoding section that encode a residual signal of a pixel signal of the target area on the basis of the generated intra frame predictive signal. | 09-17-2009 |
20090232207 | METHOD AND APPARATUS FOR ENCODING/DECODING IMAGE BASED ON INTRA PREDICTION - Provided are an intra prediction-based encoding method, and an apparatus for accomplishing the same. In the method, a linear prediction coefficient of a current block is calculated based on encoded blocks adjacent to the current block, a predicted block is generated by performing intra prediction on the current block by using a linear prediction coefficient, and a residual block that is the difference between the current block and the predicted block is encoded. Accordingly, information regarding a direction of intra prediction does not need to be additionally transmitted, thereby reducing the amount of bits that are to be transmitted, and the quality of an image can be improved by adaptively controlling the efficiency and precision of intra prediction. | 09-17-2009 |
20090232208 | METHOD AND APPARATUS FOR ENCODING AND DECODING IMAGE - Provided are a method and an apparatus for encoding and decoding an image to improve the efficiency for predicting an image by reducing discontinuity between prediction blocks by performing filtering on a prediction picture. The method of encoding an image includes generating filtered prediction pixel values by performing filtering in which a weighted sum of prediction pixels of a prediction picture with respect to peripheral prediction pixels is calculated, and encoding a difference value between the filtered prediction picture comprising the filtered prediction pixel values and a current picture. | 09-17-2009 |
20090232209 | VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination. | 09-17-2009 |
20090238268 | METHOD FOR VIDEO CODING - A method for video coding is provided. The method comprises retrieving a video frame and at least one reference frame, determining a search window size according to the number of the at least one reference frame, performing prediction encoding on the video frame according to the number of the at least one reference frame and the search window size to obtain coding information and determining another search window size and a number of reference frames according to the coding information. | 09-24-2009 |
20090238269 | Method and Apparatus for Decoupling Frame Number and/or Picture Order Count (POC) for Multi-View Video Encoding and Decoding - There is disclosed and described a decoder and decoding method for decoding at least one picture corresponding to at least one of at least two views of multi-view video content from a bitstream, wherein in the bitstream at least one of coding order information and output order information for the at least one picture is decoupled from the at least one view to which the at least one picture corresponds. Furthermore, there is disclosed and described an encoder and encoding method for encoding at least one picture corresponding to at least one of at least two views of multi-view video content to form a resultant bitstream, wherein in the resultant bitstream at least one of coding order information and output order information for the at least one picture is decoupled from the at least one view to which the at least one picture corresponds. | 09-24-2009 |
20090238270 | Apparatus and method for modifying predicted values, and decoding system - An apparatus for modifying predicted values in a predicted image for input to a decoder starts by taking the most significant information bit plane from the predicted image and submitting it to the decoder to be decoded. Subsequent information bit planes are then taken in descending order and submitted to the decoder, but first each of these information bit planes is modified at the locations of prediction errors identified in the preceding information bit plane by comparing that information bit plane with the corresponding decoded bit plane. The modifications improve the general accuracy of the decoded image, enabling the decoder to decode the bit planes with less additional coded information than would otherwise be required. The apparatus is useful in distributed video coding systems. | 09-24-2009 |
20090238271 | APPARATUS AND METHOD FOR ENCODING AND DECODING USING ALTERNATIVE CONVERTER ACCODING TO THE CORRELATION OF RESIDUAL SIGNAL - Provided is an apparatus and method for encoding and decoding using alternative transform units according to the correlation of residual signals. The video encoding apparatus includes a first transforming unit for performing discrete cosine transform (DCT), first quantization, first inverse quantization, and inverse DCT on a block basis onto residual coefficients generated after intra frame prediction or inter frame prediction; a second transforming unit for performing discrete sine transform (DST), second quantization, second inverse quantization, and inverse DST on a block basis onto the residual coefficients; a selecting unit for selecting one having a high compression rate between the first and second transforming units for each block through performing rate-distortion optimization; and a flag marking unit for recording information about the selected transforming unit at a flag bit provided on a macroblock basis. | 09-24-2009 |
20090238272 | VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination. | 09-24-2009 |
20090238273 | VIDEO ENCODING/ DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination. | 09-24-2009 |
20090238274 | VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination. | 09-24-2009 |
20090238275 | VIDEO ENCODING/ DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination. | 09-24-2009 |
20090245352 | VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination. | 10-01-2009 |
20090245353 | METHOD AND APPARATUS FOR INTRA-PREDICTION VIDEO CODING/DECODING - An intra-prediction coding and decoding method is provided, in which a picture to be encoded is received in coding units, each of the coding units is divided into a plurality of sub-units, an IPM is determined for each coding unit, residual data is acquired for each sub-unit of each coding unit according to the determined IPM, and information about the IPM of each coding unit and the residual data of each sub-unit of each coding unit are encoded. | 10-01-2009 |
20090245354 | VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination. | 10-01-2009 |
20090245355 | VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination. | 10-01-2009 |
20090245356 | VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination. | 10-01-2009 |
20090245357 | VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination. | 10-01-2009 |
20090245358 | VIDEO ENCODING/ DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination. | 10-01-2009 |
20090245359 | VIDEO ENCODING/ DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination. | 10-01-2009 |
20090245360 | VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination. | 10-01-2009 |
20090245361 | VIDEO ENCODING/ DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination. | 10-01-2009 |
20090245362 | VIDEO ENCODING/ DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination. | 10-01-2009 |
20090245363 | VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination. | 10-01-2009 |
20090245364 | VIDEO ENCODING/ DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination. | 10-01-2009 |
20090245365 | VIDEO ENCODING/ DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination. | 10-01-2009 |
20090245366 | VIDEO ENCODING/ DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination. | 10-01-2009 |
20090245367 | VIDEO ENCODING/ DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination. | 10-01-2009 |
20090245368 | VIDEO ENCODING/ DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination. | 10-01-2009 |
20090245369 | VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination. | 10-01-2009 |
20090245370 | VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination. | 10-01-2009 |
20090252221 | METHOD AND AN APPARATUS FOR ENCODING OR DECODING A VIDEO SIGNAL - A method of processing a video signal is disclosed. The present invention includes receiving prediction information of a macroblock and filer information, predicting a current picture using the prediction information of the macroblock, and applying a filter using the predicted current picture and the filter information. | 10-08-2009 |
20090252222 | VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination. | 10-08-2009 |
20090252223 | VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination. | 10-08-2009 |
20090252224 | VIDEO ENCODING / DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination. | 10-08-2009 |
20090252225 | VIDEO ENCODING/ DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination. | 10-08-2009 |
20090252226 | VIDEO ENCODING/ DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination. | 10-08-2009 |
20090257491 | MOVING PICTURE CODING APPARATUS, MOVING PICTURE DECODING APPARATUS, AND STREAM DATA - A signal separation unit ( | 10-15-2009 |
20090257492 | VIDEO DATA MANAGEMENT - The invention relates to encoding and decoding pixel blocks of a video frame through a hybrid mode involving usage of a first prediction of a pixel block and at least a second prediction of the pixel block. An initial first weighting factor is modified using a factor modifier to generate a first weighting factor comprising multiple different factor values that are assignable to the different pixel-based first prediction values of the first prediction. The first weighting factor is applied to the first prediction and a second weighting factor is applied to the second block prediction. The at least two weighted predictions are then combined to form a hybrid prediction of the current pixel block. | 10-15-2009 |
20090257493 | INTERPOLATION FILTER SUPPORT FOR SUB-PIXEL RESOLUTION IN VIDEO CODING - This disclosure describes filtering techniques applied by an encoder and a decoder during the prediction stage of a video encoding and/or decoding process. The filtering techniques may enhance the accuracy of predictive data used during fractional interpolation, and may improve predictive data of integer blocks of pixels. There are several aspects to this disclosure, including a useful twelve-pixel filter support that may be used for interpolation, techniques that use coefficient symmetry and pixel symmetry to reduce the amount of data needed to be sent between an encoder and a decoder to configure the filter support for interpolation, and techniques for filtering data at integer pixel locations in a manner that is similar to sub-pixel interpolation. Other aspects of this disclosure concern techniques for encoding information in the bitstream to convey the type of filter used, and possibly the filter coefficients used. Predictive coding of filter coefficients is also described. | 10-15-2009 |
20090257494 | SYMMETRY FOR INTEROPLATION FILTERING OF SUB-PIXEL POSITIONS IN VIDEO CODING - This disclosure describes filtering techniques applied by an encoder and a decoder during the prediction stage of a video encoding and/or decoding process. The filtering techniques may enhance the accuracy of predictive data used during fractional interpolation, and may improve predictive data of integer blocks of pixels. There are several aspects to this disclosure, including a useful twelve-pixel filter support that may be used for interpolation, techniques that use coefficient symmetry and pixel symmetry to reduce the amount of data needed to be sent between an encoder and a decoder to configure the filter support for interpolation, and techniques for filtering data at integer pixel locations in a manner that is similar to sub-pixel interpolation. Other aspects of this disclosure concern techniques for encoding information in the bitstream to convey the type of filter used, and possibly the filter coefficients used. Predictive coding of filter coefficients is also described. | 10-15-2009 |
20090257495 | VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination. | 10-15-2009 |
20090262803 | Encoding Apparatus, Encoding Method, and Program of Same and Decoding Apparatus, Decoding Method, and Program of Same - An encoding apparatus for encoding progressive image data and interlace image data corresponding to this progressive image data, having a first encoding unit configured to encode picture data composing the interlace image data to generate first encoded data and decoding and recomposing the first encoded data to generate recomposed image data, an up sample processing unit configured to up sample the generated recomposed image data to generate image data having the same resolution as that of the progressive image data, and a second encoding unit configured to encode the picture data composing the progressive image data to generate second encoded data using the generated image data as predictive image data. | 10-22-2009 |
20090262804 | Reference picture list management syntax for multiple view video coding - A picture reference list ordering process is defined for a multiview coder for coding moving pictures, where the picture list has the coding order of reference pictures used to code a picture specified in relationship to whether a picture to be coded is associated with a view. The ordering of the picture list will therefore change the coding order of the reference pictures in the picture reference list depending on the temporal relationships the reference pictures have with the picture to be coded and views associated with the reference picture. | 10-22-2009 |
20090262805 | VIDEO ENCODING/ DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination. | 10-22-2009 |
20090262806 | VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination. | 10-22-2009 |
20090262807 | VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination. | 10-22-2009 |
20090262808 | VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination. | 10-22-2009 |
20090262809 | VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination. | 10-22-2009 |
20090262810 | VIDEO ENCODING/ DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination. | 10-22-2009 |
20090262811 | VIDEO ENCODING/ DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination. | 10-22-2009 |
20090262812 | VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination. | 10-22-2009 |
20090262813 | VIDEO ENCODING/ DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination. | 10-22-2009 |
20090262814 | VIDEO ENCODING/ DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination. | 10-22-2009 |
20090268809 | Method, apparatus and system for robust video transmission - A method of transmitting video data related to a sequence of video frames, includes: encoding the video frames according to a first predictive encoding to generate encoded video data, the encoded video data including a prediction error based on the difference between a portion of a current video frame in the sequence and a first predictor thereof based on a first preceding video frame in the sequence; generating auxiliary video data related to the portion of the current video frame; and transmitting the encoded video data and the auxiliary video data to a receiver, the encoded video data being transmitted over a first channel, and the auxiliary video data being transmitted over a second channel. The step of generating auxiliary video data includes calculating a correlation between the first predictor and a predetermined second predictor based on a second preceding video frame in the sequence, the second preceding video frame preceding in the sequence the first preceding video frame. | 10-29-2009 |
20090268810 | Geometric intra prediction - The use of parametric models to capture and represent local signal geometry allows a new geometric intra prediction scheme to better encode video images. The encoding scheme gives the video encoder the flexibility and scalability to match the video frame content with the desired computational complexity. It also allows the encoder to encode the images more efficiently using intra prediction because it reduces the artificial edges that occur during standard intra encoding. | 10-29-2009 |
20090268811 | Dynamic Image Reproducing Method And Device - A moving picture reproducing apparatus reproduces a moving picture file including different picture formats at a high speed. A parameter setting unit sets the number of frame α to be displayed per a unit time, a reproduction speed ratio β, a bit rate γ (α, β, and γ are real numbers). A seek distance setting unit sets a seek distance SD according to a value given by γ/α×β. An intra-frame encoded picture searching unit starts a search for a next intra-frame encoded picture at a search start position. A decoder decodes an intra-frame encoded picture found as a result of the search by the intra-frame encoded picture searching unit. The intra-frame encoded picture searching unit sets a data position ahead of a data position of the intra-frame encoded picture found by the seek distance, as a search start position to start searching for a next intra-frame encoded picture. | 10-29-2009 |
20090268812 | VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination. | 10-29-2009 |
20090268813 | VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination. | 10-29-2009 |
20090268814 | VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination. | 10-29-2009 |
20090268815 | VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination. | 10-29-2009 |
20090268816 | ADVANCED VIDEO CODING TO MULTIVIEW VIDEO CODING TRANSCODER - Systems, methods and computer program products for transcoding advanced video coding (AVC) bitstreams into multiview video coding (MVC) bitstreams are described. In some implementations, a MVC transcoder may be used to convert non-anchor pictures (e.g., at a specified temporal point) into anchor pictures by using only inter-view prediction. The MVC transcoder also may utilize inter-view reference pictures (in addition to temporal reference pictures) in the motion estimation/mode decision functions of the non-anchor pictures. The output of the MVC transcoder may be one or more MVC bitstreams each representing a different view of a same scene or image. | 10-29-2009 |
20090274211 | APPARATUS AND METHOD FOR HIGH QUALITY INTRA MODE PREDICTION IN A VIDEO CODER - A computer readable storage medium has executable instructions to select a plurality of blocks in a video sequence to be coded as intra-coded blocks. Aggregate intra prediction costs are computed for each intra-coded block relative to a corresponding previous intra-coded block. An intra prediction mode is selected for each intra-coded block based on the aggregate intra prediction costs. | 11-05-2009 |
20090274212 | Semiconductor Device Having Moving Image Transcoder and Transcoding Method Therefor - Embodiments include systems and methods for transcoding moving image data. Specifically, in one embodiment, moving image data encoded in a first format can be time divided into a plurality of segments and transmission segments formed from these segments. Each transmission segments can correspond to a particular segment of the moving image data and include the moving image data of that segment plus terminal end data from a preceding segment. One or more second terminals can receive these transmission segments from the first terminal and, working at least partially in parallel, generate second encoded portions from a transmission segment by decoding the moving image data in the first format from the transmission segment using the terminal end data included in the transmission segment and encoding the moving image data in the second format. Moving image data encoded in the second format may be generated by connecting these second encoded portions. | 11-05-2009 |
20090279606 | METHOD AND APPARATUS FOR ENCODING AND DECODING AN IMAGE BASED ON PLURALITY OF REFERENCE PICTURES - A method and apparatus for encoding and decoding an image using a plurality of reference pictures. In an exemplary embodiment, the method of encoding an image comprises: generating information about transforms between a first picture and a second picture; generating a reference picture by transforming the second picture based on the generated information about transforms; predicting a current block of a current picture based on at least one of the reference picture and the first picture; and encoding the current block based on the predicting. Therefore, prediction encoding based on more accurate prediction is possible, thereby increasing a compression ratio of image encoding. | 11-12-2009 |
20090279607 | Method and apparatus for video coding - In uniform superposition of two predictions toward a weighted superposition, such as in coding B frames, weighting is based on reliability of a reference picture used for determination of the prediction. Since there is a relationship between the reliability and the respective quantization parameter, coupling to the quantization parameter that is also known in the receiver also can be effected advantageously. | 11-12-2009 |
20090285284 | PICTURE CODING APPARATUS AND PICTURE DECODING APPARATUS - The present invention provides a picture coding apparatus which can reduce a load in decoding. When a RAU to be coded is an open GOP type RAU, the present invention includes: a motion estimation unit, a motion compensation unit, and the like which codes a picture to be coded to generate a BI-picture; a BI information generation unit which generates a RAU map indicating whether or not the BI-picture is positioned in a display order immediately before a starting I-picture in the RAU of the stream; and a variable length coding unit which writes the RAU map into the RAU of the stream. | 11-19-2009 |
20090285285 | INFORMATION PROCESSING APPARATUS AND INTER-PREDICTION MODE DETERMINATION METHOD - According to one embodiment, an information processing apparatus which encodes a moving image signal, includes an inter-prediction mode determination unit which determines a combination of an inter-prediction mode used by an inter-prediction unit and a DCT used by a transformation unit among from an inter-prediction modes and a DCTs, for each of macroblocks. The inter-prediction mode determination unit includes a first selection unit which selects DCTs of a predetermined number from the DCTs, for at least one specific inter-prediction mode among the inter-prediction modes, and a second selection unit which selects a combination of one inter-prediction mode and one DCT from the inter-prediction modes and the DCTs of the predetermined number selected by the first selection unit. | 11-19-2009 |
20090285286 | VIDEO ENCODING/ DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination. | 11-19-2009 |
20090285287 | VIDEO ENCODING/ DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination. | 11-19-2009 |
20090285288 | Video Encoding/Decoding Method and Apparatus - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination. | 11-19-2009 |
20090285289 | VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination. | 11-19-2009 |
20090285290 | VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination. | 11-19-2009 |
20090285291 | VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination. | 11-19-2009 |
20090285292 | VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination. | 11-19-2009 |
20090285293 | VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination. | 11-19-2009 |
20090285294 | VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination. | 11-19-2009 |
20090285295 | VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination. | 11-19-2009 |
20090285296 | VIDEO ENCODING/ DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination. | 11-19-2009 |
20090285297 | VIDEO ENCODING/ DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination. | 11-19-2009 |
20090285298 | VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination. | 11-19-2009 |
20090290638 | Simplified transmission method for a stream of signals between a transmitter and an electronic device - The present invention essentially relates to a transmission method, via a communications network using a packet data transmission protocol, of a stream of multimedia samples between a transmitter server and at least one decoder receiver intended to restore these data in real time, this stream of samples coding images of variable size, the stream of samples coding images (I, P, B) of variable size, characterized in that the method comprises notably different steps consisting in:
| 11-26-2009 |
20090290639 | VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination. | 11-26-2009 |
20090290640 | VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination. | 11-26-2009 |
20090296810 | VIDEO CODING APPARATUS AND METHOD FOR SUPPORTING ARBITRARY-SIZED REGIONS-OF-INTEREST - A computer readable storage medium has executable instructions to select a plurality of macroblocks in a video sequence to be coded as anchor macroblocks, the anchor macroblocks distributed across the video sequence and facilitating random access decoding of a portion of the video sequence. The video sequence is coded into a bit stream. Auxiliary information associated with the anchor macroblocks is generated. The auxiliary information associated with the anchor macroblocks is inserted in a supplementary section of the bit stream. | 12-03-2009 |
20090296811 | Method and Apparatus for Decoding/Encoding a Video Signal - The present invention provides a method of decoding a video signal. The method includes the steps of obtaining view information of a picture from the video signal and generating information for reference picture management using the view information. | 12-03-2009 |
20090296812 | FAST ENCODING METHOD AND SYSTEM USING ADAPTIVE INTRA PREDICTION - Fast encoding method and system are provided which can transmit video data in real time using adaptive intra prediction in accordance with the H.264/AVC (Advanced Video Codec) standard so as to efficiently provide security-related images or multimedia images in various network environments with high quality. An intra prediction method of compressing and encoding an image includes the steps of: comparing an SAD value C calculated from macro block data of a present frame and a previous frame with a reference value K to determine a prediction method; and selectively performing on input macro block data a first method of determining a best mode and a block size by prediction in a plurality of prediction modes based on spatial directivity and generating prediction data and a second method of generating prediction data using the best mode and the block size used in the previous frame, depending on the determined prediction method. | 12-03-2009 |
20090304074 | Image Decoding Method, Device Therefore, and Program - A lower hierarchical decoder ( | 12-10-2009 |
20090304075 | Moving Image Processing Method, Program of Moving Image Processing Method, Recording Medium Having Program of Moving Image Processing Method Recorded Thereon, and Moving Image Processing Apparatus - The present invention is applied, for example, to a moving image encoding apparatus and decoding apparatus based on ITU-T H.264. Syntax elements with a high frequency of appearance are processed using probability state variables held in a second memory | 12-10-2009 |
20090304076 | MEMORY ARRANGEMENT METHOD AND SYSTEM FOR AC/DC PREDICTION IN VIDEO COMPRESSION APPLICATIONS BASED ON PARALLEL PROCESSING - A memory arrangement method and system for AC/DC prediction in video compression applications based on parallel processing is disclosed. The method and system achieves optimum operating efficiency for data operation and reading based on parallel computing characteristics (Single Instruction Multiple Data (SIMD)) of an operation unit of the system. Additionally, the method transplants a VC-1 video compression system running in an operating system (the Windows operating system, for example) to a system platform using a digital signal processor (DSP) as an operation unit and implements a real-time VC-1 encoder according to parallel computing characteristics of a hardware core of the system platform. | 12-10-2009 |
20090304077 | REFRESH METHOD AND APPARATUS - Apparatuses and methods for improving coding processes and coding parameters for coding video data are provided for. A coder may select coding parameters for video data according to a default coding policy. The default coding policy may include selection of prediction modes (e.g., intra-coding or inter-coding) for each pixel group in each frame. A video coder may select some pixel groups in a frame to be coded as refresh pixel groups as an exception to the default assignment policies. The selection of refresh pixel groups may be based on prediction relationships among multiple frames of source video data. The default coding of the refresh pixel groups is then modified to enhanced the coding of the refresh pixel groups. The refresh pixel groups may permit fewer intra (I) frames be sent and/or may improve the quality of the recovered video. | 12-10-2009 |
20090304078 | VARIABLE LENGTH DECODER AND ANIMATION DECODER THEREWITH - The variable length decoder has a memory device including a plurality of lookup tables, and sequentially decodes codewords of variable-length codes using the memory device. The decoded values corresponding to the codewords and control information pieces are stored in the lookup tables. In decoding one codeword, one lookup table is selected from among the plurality of lookup tables. In the decode, one decoded value corresponding to the one codeword, and a control information piece for selecting a next lookup table depending on the decoded value and used for a next decode are produced from the selected lookup table in response to the one codeword in parallel. | 12-10-2009 |
20090310674 | METHOD AND DEVICE FOR CODING A SEQUENCE OF IMAGES - The method of coding a sequence of images comprising at least one group of a plurality of original images, in several scalability layers, comprises, to code said group of original images, a step of coding at least one base layer on the basis of the group of original images to code to constitute an intermediate data stream. | 12-17-2009 |
20090310675 | VIDEO ENCODING METHOD, VIDEO DECODING METHOD, VIDEO ENCODING APPARATUS, VIDEO DECODING APPARATUS, VIDEO ENCODING PROGRAM, AND VIDEO DECODING PROGRAM - A video processing system is provided with video encoding apparatus | 12-17-2009 |
20090310676 | PROCESSING MULTIVIEW VIDEO - Decoding a multiview video signal comprises receiving a bitstream comprising the multiview video signal encoded according to dependency relationships between respective views, and view-dependency information representing the dependency relationships in a two-dimensional data structure; extracting the two-dimensional data structure and determining the dependency relationships from the extracted data structure; and decoding the multiview video signal according to the determined dependency relationships. | 12-17-2009 |
20090316781 | PICTURE CODING METHOD - A picture coding method according to the present invention includes: a coding step (S | 12-24-2009 |
20090323805 | VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding apparatus comprises a frame memory/predictive image generator having a first predictive mode for generating a predictive image signal by selecting a combination from among a plurality combinations of a reference image number and a plurality of predictive parameters, and a second predictive mode for generating a predictive image signal according to a predictive parameter computed based on reference image numbers of reference images and an image-to-image distance, and a variable-length encoder to select one of the first and second prediction modes by the number of reference images, and encode orthogonal transformation coefficient information concerning a predictive error signal of a predictive image signal with respect to input video signal, mode information indicating an encoding mode, motion vector information and combination of selected reference image number with predictive parameter index information indicating combination of selected reference image information. | 12-31-2009 |
20090323806 | VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding apparatus comprises a frame memory/predictive image generator having a first predictive mode for generating a predictive image signal by selecting a combination from among a plurality combinations of a reference image number and a plurality of predictive parameters, and a second predictive mode for generating a predictive image signal according to a predictive parameter computed based on reference image numbers of reference images and an image-to-image distance, and a variable-length encoder to select one of the first and second prediction modes by the number of reference images, and encode orthogonal transformation coefficient information concerning a predictive error signal of a predictive image signal with respect to input video signal, mode information indicating an encoding mode, motion vector information and combination of selected reference image number with predictive parameter index information indicating combination of selected reference image information. | 12-31-2009 |
20100002765 | Image encoding apparatus and method - An image encoding apparatus includes a calculation unit for calculating complexity from pixel values of an input image, the complexity representing a code amount generated by prediction encoding each block included in a prediction target region of the input image, and an allocation unit for allocating a code amount to each block based on the calculated complexity of each block and an allowable code amount previously set for the prediction target region. The apparatus further includes a determination unit for determining an encoding parameter corresponding to each block based on the complexity of each block and the code amount allocated to each block, and an encoding unit for encoding each block by using the determined encoding parameter of each block. Finally, the apparatus includes a resetting unit for resetting the allowable code amount for a next prediction target region based on an occupancy amount of a buffer. | 01-07-2010 |
20100002766 | VIDEO ENCODING/ DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination. | 01-07-2010 |
20100002767 | DYNAMIC IMAGE ENCODING DEVICE, DYNAMIC IMAGE DECODING DEVICE, DYNAMIC IMAGE ENCODING METHOD, DYNAMIC IMAGE DECODING METHOD, DYNAMIC IMAGE ENCODING PROGRAM, AND DYNAMIC IMAGE DECODING PROGRAM - A device and method to perform encoding and decoding at a high compression rate even with a video of a mixture of pictures of different bandwidths. In a video encoding device, a predicted signal generator extracts spatial frequency components in a predetermined band from a predetermined extraction reference picture except for a target reference picture used as a picture for prediction of a target picture as an object to be encoded, among reference pictures stored in memory. The predicted signal generator generates a predicted signal for the target picture from the target reference picture and the extracted spatial frequency components. | 01-07-2010 |
20100008418 | METHOD AND APPARATUS FOR ENCODING AND/OR DECODING VIDEO DATA USING ENHANCEMENT LAYER RESIDUAL PREDICTION FOR BIT DEPTH SCALABILITY - A scalable video bitstream may have an H.264/AVC compatible base layer and a scalable enhancement layer, where scalability refers to color bit depth. The H.264/AVC scalability extension SVC provides also other types of scalability, e.g. spatial scalability where the number of pixels in BL and EL are different. According to the invention, BL information is upsampled in two logical steps, one being texture upsampling and the other being bit depth upsampling. Texture upsampling is a process that increases the number of pixels, and bit depth upsampling is a process that increases the number of values that each pixel can have, corresponding to the pixels color intensity. The upsampled BL data are used to predict the collocated EL. The BL information is upsampled at the encoder side and in the same manner at the decoder side, wherein the upsampling refers to spatial and bit depth characteristics. | 01-14-2010 |
20100014584 | Methods circuits and systems for transmission and reconstruction of a video block - Disclosed is a method, circuit and system for transmission and reconstruction of a video block. A video stream may be composed of sequential video frames, and each video frame may be composed of one or more video blocks including a set of pixels. Prior to transmission of the data associated with a video block, the video block data may be transformed into a set of transform (e.g. frequency) coefficients using a spatial to frequency transform such as a two dimensional discrete cosine transform. Selection of the subset of transform coefficients to be transmitted may be based on a characteristic of the video block. | 01-21-2010 |
20100014585 | METHOD AND SYSTEM FOR ENCODING A VIDEO SIGNAL, ENCODED VIDEO SIGNAL, METHOD AND SYSTEM FOR DECODING A VIDEO SIGNAL - Some video compression standards use multiple temporal predictions. One or more of the oldest temporal predict ions are overwritten with another prediction. A prediction used in an enhancement encoder is in embodiment overwritten by a prediction produced in a base stream encoder. | 01-21-2010 |
20100020870 | Method and Apparatus for Decoding/Encoding a Video Signal - The present invention provides a method of decoding a video signal. The method includes the steps of obtaining identification information indicating an assignment method of a reference index from the video signal, reordering reference pictures for inter-view prediction according to the identification information, and decoding the video signal using the reordered reference pictures, wherein the reference index includes view information for identifying a view of the reference picture. | 01-28-2010 |
20100020871 | Method and Device for Video Coding and Decoding - Embodiments of the present invention relate to video coding for multi-view video content. It provides a coding system enabling scalability for the multi-view video content. In one embodiment, a method is provided for encoding at least two views representative of a video scene, each of the at least two views being encoded in at least two scalable layers, wherein one of the at least two scalable layers representative of one view of the at least two views is encoded with respect to a scalable layer representative of the other view of the at least two views. | 01-28-2010 |
20100020872 | INTRA PREDICTION ENCODING CONTROL METHOD AND APPARATUS, PROGRAM THEREFOR, AND STORAGE MEDIUM WHICH STORES THE PROGRAM - An intra prediction encoding control method used in intra prediction encoding having a plurality of prediction modes and prediction block sizes, wherein the prediction mode and the prediction block size each can be switched when encoding is performed. The method includes a step of computing a flatness degree index which indicates a degree of flatness of a target area for encoding; a step of determining a prediction block size used in intra prediction encoding of the target area, in accordance with the computed flatness degree index; and a step of selecting a prediction mode used in the intra prediction encoding of the target area, for the determined prediction block size. | 01-28-2010 |
20100020873 | MOVING PICTURE CODING METHOD, AND MOVING PICTURE DECODING METHOD - A moving picture coding apparatus ( | 01-28-2010 |
20100027622 | Methods and apparatus for efficient first-pass encoding in a multi-pass encoder - There are provided methods and apparatus for efficient first-pass encoding in a multi-pass encoder. An apparatus includes a multi-pass video encoder for performing a first-pass encoding of input image data for at least one picture by sub-sampling at least a portion of the input image data prior to the first-pass encoding. The sub-sampling is at least one of spatial sub-sampling and temporal sub-sampling. | 02-04-2010 |
20100027623 | METHOD AND DEVICE FOR OPTIMIZING THE COMPRESSION OF A VIDEO STREAM - The purpose of the invention is to enable, or not enable, motion compensation depending on whether it is profitable to do so, with profitability being expressed in terms of the costs in rate and in distortion. | 02-04-2010 |
20100027624 | METHODS AND APPARATUS FOR USING SYNTAX FOR THE CODED_BLOCK_FLAG SYNTAX ELEMENT AND THE CODE_BLOCK_PATTERN SYNTAX ELEMENT FOR THE CAVLC 4:4:4 INTRA, HIGH 4:4:4 INTRA, AND HIGH 4:4:4 PREDICTIVE PROFILES IN MPEG-4 AVC HIGH LEVEL CODING - There are provided methods and apparatus for using syntax for the coded_block_flag syntax element for the CAVLC 4:4:4 Intra, High 4:4:4 Intra, and High 4:4:4 Predictive profiles in MPEG-4 AVC high level coding. An apparatus includes an encoder for encoding image data into a resultant bitstream in accordance with an encoding profile that encodes a sample of the image data such that the sample includes two chrominance arrays and a luminance array. Each of the two chrominance arrays has a same height and a same width as the luminance array. The encoder indicates a presence of at least one 8x8 block in the resultant bitstream using a syntax element. | 02-04-2010 |
20100027625 | APPARATUS FOR ENCODING AND DECODING - An apparatus for encoding a sequence of samples of an audio signal, with each sample within the sequence having an original position, includes a sorter for sorting the samples depending on their sizes, in order to obtain a sorted sequence of samples, with each sample having a sorting position within the sorted sequence. Furthermore, the apparatus has an encoder for encoding the sorted samples and information on a relation between the original and sorting positions of the samples. | 02-04-2010 |
20100027626 | VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination. | 02-04-2010 |
20100027627 | VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination. | 02-04-2010 |
20100027628 | VIDEO ENCODING/ DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination. | 02-04-2010 |
20100027629 | VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination. | 02-04-2010 |
20100027630 | VIDEO ENCODING/ DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination. | 02-04-2010 |
20100027631 | VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination. | 02-04-2010 |
20100027632 | VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination. | 02-04-2010 |
20100027633 | VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination. | 02-04-2010 |
20100027634 | VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination. | 02-04-2010 |
20100027635 | VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination. | 02-04-2010 |
20100027636 | VIDEO ENCODING/ DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination. | 02-04-2010 |
20100027637 | VIDEO ENCODING/ DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination. | 02-04-2010 |
20100027638 | VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination. | 02-04-2010 |
20100027639 | VIDEO ENCODING/ DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination. | 02-04-2010 |
20100027640 | VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination. | 02-04-2010 |
20100027641 | VIDEO ENCODING/ DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination. | 02-04-2010 |
20100027642 | VIDEO ENCODING/ DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination. | 02-04-2010 |
20100027643 | VIDEO ENCODING/ DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination. | 02-04-2010 |
20100027644 | VIDEO ENCODING/ DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination. | 02-04-2010 |
20100027645 | VIDEO ENCODING/ DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination. | 02-04-2010 |
20100027646 | VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination. | 02-04-2010 |
20100027647 | VIDEO ENCODING/ DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination. | 02-04-2010 |
20100027648 | VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination. | 02-04-2010 |
20100027649 | VIDEO ENCODING/ DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination. | 02-04-2010 |
20100027650 | VIDEO ENCODING/ DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination. | 02-04-2010 |
20100027651 | VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination. | 02-04-2010 |
20100027652 | VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination. | 02-04-2010 |
20100027653 | METHOD AND APPARATUS FOR DECODING/ENCODING A VIDEO SIGNAL - The method includes the steps of receiving the multi-view video data stream including a random access picture including a random access slice, the random access slice referencing only slice corresponding to a same time and a different view of the random access picture; obtaining random access flag for inter-view prediction, the random access flag indicating whether a type of picture is the random access picture; obtaining initialization information of a reference picture list for the random access slice based on the random access flag, the initialization information representing a reference relation between a plurality of views with view number information and view identification information; initializing the reference picture list of the random access slice using the view number information and the view identification information; determining a prediction value of a macroblock in the random access picture based on the initialized reference picture list; and decoding the macroblock using the prediction value, wherein the initialization information is obtained based on a value indicating decoding order between the plurality of views. | 02-04-2010 |
20100027654 | METHOD AND APPARATUS FOR DECODING/ENCODING A VIDEO SIGNAL - The method includes the steps of receiving the multi-view video data stream including a random access picture including a random access slice, the random access slice referencing only slice corresponding to a same time and a different view of the random access picture; obtaining random access flag for inter-view prediction, the random access flag indicating whether a type of picture is the random access picture; obtaining initialization information of a reference picture list for the random access slice based on the random access flag, the initialization information representing a reference relation between a plurality of views with view number information and view identification information; initializing the reference picture list of the random access slice using the view number information and the view identification information; determining a prediction value of a macroblock in the random access picture based on the initialized reference picture list; and decoding the macroblock using the prediction value, wherein the initialization information is obtained based on a value indicating decoding order between the plurality of views. | 02-04-2010 |
20100034260 | VIDEO ENCODING METHOD AND DECODING METHOD, APPARATUSES THEREFOR, PROGRAMS THEREFOR, AND STORAGE MEDIA WHICH STORE THE PROGRAMS - A video encoding method for generating, based on disparity information between an already-encoded reference camera image and an encoding target camera image corresponding to the reference camera image, a disparity-compensated image by means of inter-camera image prediction; and encoding a differential image between the encoding target camera image and the disparity-compensated image. The method includes selecting, for each predetermined section unit on the differential image, one of a decoded differential image group obtained by decoding a differential image between the already-encoded camera image and the disparity-compensated image and a decoded camera image group obtained by decoding the already-encoded camera image, by determining whether or not there is a disparity-compensated image at the corresponding position, that is, whether or not the corresponding pixel in the disparity-compensated image has an effective value. | 02-11-2010 |
20100034261 | VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination. | 02-11-2010 |
20100034262 | VIDEO ENCODING/ DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination. | 02-11-2010 |
20100034263 | VIDEO ENCODING/ DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination. | 02-11-2010 |
20100034264 | VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination. | 02-11-2010 |
20100040143 | Video coding apparatus and method - A video coding apparatus includes an intra prediction mode determining unit that fixedly selects a mode in which same intra prediction values are used for all blocks to be processed in a macroblock; and an intra prediction coding unit that performs intra prediction coding separately for an AC component and a DC component of a block to be processed. | 02-18-2010 |
20100046619 | METHOD AND APPARATUS FOR DECODING/ENCODING A VIDEO SIGNAL - A method of decoding a video signal is disclosed. The present invention includes obtaining identification information indicating whether a coded picture of a current NAL unit is an inter-view picture group, obtaining interview reference information of the inter-view picture group, and constructing a reference picture list for inter-view prediction using the inter-view reference information according to the identification information, wherein the inter-view reference information includes view identification information of an inter-view reference picture. | 02-25-2010 |
20100046620 | SCALABLE VIDEO CODING ENCODER WITH ADAPTIVE REFERENCE FGS AND FGS MOTION REFINEMENT MECHANISM AND METHOD THEREOF - Provided are alternatives for improving coding efficiency when an AR-FGS technique and an FGS motion refinement technique are applied to scalable video coding. When prediction of a residual signal an FGS layer is not performed, a ′ prediction signal of block related to the FGS layer is predicted in the same manner as the manner of predicting a prediction signal of a base quality layer. A scaling factor is allowed to have a non-zero value if required, and the residual signal of the FGS layer is used to determine a scaling factor of a higher FGS layer. The AR-FGS and FGS motion refinement techniques are restricted from being simultaneously used for key pictures. | 02-25-2010 |
20100046621 | IMAGE PROCESSING DEVICE AND IMAGE PROCESSING METHOD - The present invention can suppress the decline in video quality during encoding. The present invention generates, for each of the nine intra image prediction modes preset according to the AVC standard, a difference image data item containing a difference value from pixels surrounding a process-target pixel. Then, an encoding device ( | 02-25-2010 |
20100054331 | VIDEO ENCODING WITH INTRA ENCODING SELECTION - The method, for the determination of the coding mode of a macroblock constituted of picture blocks, carries out a pre-selection of intra directional predictive coding modes of macroblock blocks according to the following steps:
| 03-04-2010 |
20100054332 | MOVING PICTURE DECODING APPARATUS AND MOVING PICTURE DECODING METHOD - A moving picture decoding apparatus ( | 03-04-2010 |
20100054333 | VIDEO TRAFFIC BANDWIDTH PREDICTION - Video traffic bandwidth prediction may be provided. Frames of a video stream may be encoded according to a compression scheme. The encoded frames may be received and, depending on the type of frame, may be used to predict the size of other frames of the stream. The predicted frame sizes may then be used to allocate bandwidth for transmission of the video stream. | 03-04-2010 |
20100061451 | DYNAMIC IMAGE DECODING DEVICE - A moving image decoding device of the present invention is for decoding moving image data encoded by a predictive encoding method. In decoding a block that has been encoded by an inter-screen predictive encoding, if a reference block is not stored in frame memory, the moving image decoding device decodes the block assuming that the block has been encoded by an intra-screen predictive encoding. | 03-11-2010 |
20100061452 | METHOD AND APPARATUS FOR VIDEO ERROR CONCEALMENT USING HIGH LEVEL SYNTAX REFERENCE VIEWS IN MULTI-VIEW CODED VIDEO - There are provided a method and apparatus for video error concealment using high level syntax reference views in multi-view coded video. The apparatus includes a decoder for decoding pictures for at least one view corresponding to multi-view video content from a bitstream. The pictures are representative of at least a portion of a video sequence. At least some of the pictures correspond to different time instances in the video sequence. The decoder determines whether any of the pictures corresponding to a particular one of the different time instances are lost using an existing syntax element. The existing syntax element is for indicating at least one reference view used for inter-view prediction of at least one of the pictures. | 03-11-2010 |
20100061453 | VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination. | 03-11-2010 |
20100061454 | METHOD OF PROCESSING A VIDEO SIGNAL - A method of processing a video signal is disclosed. The present invention includes obtaining a DC (discrete cosine) transform coefficient for a current macroblock and partition information of a DC (direct current) component block from a bitstream, obtaining transform size information of each partition of the DC component block based on the partition information of the DC component block, performing an inverse DC transform or a Hadamard transform based on the transform size information of the partition of the DC component block, performing inverse quantization on a result value from the transform and an AC (alternating current) component, and reconstructing a residual block by performing an inverse DC transform on a result value from the inverse quantization, wherein the residual block includes a block indicating a pixel value difference between an original picture and a predicted picture. | 03-11-2010 |
20100067574 | VIDEO DECODING METHOD AND VIDEO ENCODING METHOD - The present invention prevents coding artifacts caused in applying image enhancement technologies to pictures that have been encoded and then decoded. A video decoder ( | 03-18-2010 |
20100067575 | DECODING METHOD, DECORDER AND DECODING APPARATUS - A decoding method generates a rectangular residual image by performing an inverse quantization and inverse frequency conversion processes based on coefficient data, a rectangular predicted image by reading a reference image based on motion vector data, and a decoded image by adding the residual image and the predicted image. The predicted images with respect to at least two or more rectangular regions are stored when generating the rectangular predicted image, and a predicted image ready signal notifies that the predicted image with respect to the at least two or more rectangular regions has been generated. The timings to store the coefficient data and the motion vector data are controlled in response to the predicted image ready signal. | 03-18-2010 |
20100067576 | Method and Apparatus to Prioritize Video Information During Coding and Decoding - A method and apparatus prioritizing video information during coding and decoding. Video information is received and an element of the video information, such as a visual object, video object layer, video object plane or keyregion, is identified. A priority is assigned to the identified element and the video information is encoded into a bitstream, such as a visual bitstream encoded using the MPEG-4 standard, including an indication of the priority of the element. The priority information can then be used when decoding the bitstream to reconstruct the video information | 03-18-2010 |
20100074329 | ADAPTIVE INTERPOLATION FILTER FOR VIDEO CODING - A video encoder that utilizes adaptive interpolation filtering for coding video data includes a prediction unit, a reconstruction unit, a reference picture buffer, a filter parameter estimator for estimating filter parameters according to the original video data and the predicted samples, and an adaptive interpolation filter for utilizing the stored filter parameters to perform filtering on the reconstructed video data. | 03-25-2010 |
20100074330 | ADAPTIVE FILTER - A video encoder includes a prediction unit for performing prediction techniques according to original video data and reconstructed video data to generate prediction samples, a reconstruction unit for reconstructing the prediction samples to form the reconstructed video data, and a reference picture buffer for storing the reconstructed video data as reference video data. The video encoder also includes a filter parameter estimator for estimating filter parameters according to the original video data of a current picture and the reconstructed video data of the current picture, and an adaptive loop filter for filtering the reconstructed video data of the current picture according to stored filter parameters of a prior picture in coding order. The filter parameter estimator and adaptive loop filter can operate in parallel. | 03-25-2010 |
20100074331 | Image encoder, image decoder, and image encoding system - An image coding system includes an image encoder and a predictive image decoder. The image encoder encodes an input image to obtain encoded data, compares the input image with a reference image, generates error information identifying parts of the input image that are changed with respect to the reference image, and outputs the encoded data and the error information. The predictive image decoder predicts the image, using a simplified prediction method for parts of the image identified by the error information as not being changed, and decodes the encoded data and the predicted data to obtain decoded image data. Use of the simplified prediction method in unchanged parts of the image reduces the prediction processing load without significant loss of prediction accuracy. | 03-25-2010 |
20100074332 | OFFSET CALCULATION IN SWITCHED INTERPOLATION FILTERS - This disclosure describes techniques for adding offset to predictive video blocks during video coding. In one example, a method of encoding a video block includes interpolating a first block of predictive values based on a first reference video unit within a first list of reference data, and a second block of predictive values based on a second reference video unit within a second list of reference data, calculating, for sub-integer pixel positions, a first offset value based on the first block and the current video block, and a second offset value based on the first offset value and the second block, determining a final block of offset values based on the first block of predictive values, the second block of predictive values, the first offset values, and the second offset values, and encoding the current video block based on the final block of offset values. | 03-25-2010 |
20100074333 | Method and system for transcoding based robust streaming of compressed video - Described herein is a novel transcoding technique called lossless inter frame transcoding (LIFT) for improving the error resilience of video streaming. According to various embodiments, conventional coded blocks are selectively transcoded into new transcoded block. At the decoder, the transcoded block can be transcoded back to the conventional coded block when the prediction is available and can also be robustly decoded independently when the prediction is unavailable. According to another embodiment, an offline transcoding and online composing technique is provided for generating a composite frame using the transcoded and conventional coded blocks and adjusting the ratio of the transcoded blocks, thereby achieving error robustness scalability. | 03-25-2010 |
20100074334 | Method and apparatus for decoding/encoding a video signal - The method includes the steps of receiving the multiview video data stream including a random access picture including a random access slice, the random access slice referencing only slice corresponding to a same time and a different view of the random access picture, obtaining initialization information of a reference picture list for the random access slice, the initialization information representing a reference relation for a single direction or a bi-direction between a plurality of views with view number information and view identification information, obtaining type information indicating whether the random access slice is predicted for a single direction or a bi-direction, initializing the reference picture list using the view number information and the view identification information according to the type information, obtaining a difference value from the a multi-view video data stream according to the type information, the difference value representing a residual of inter-view reference index in the initialized reference picture list, determining an assignment modification value for modifying the inter-view reference index in the initialized reference picture list according to the difference value, modifying the initialized reference picture list for inter-view prediction using the determined assignment modification value, determining a prediction value of a macroblock in the random access picture based on the modified reference picture list, and decoding the macroblock using the prediction value, wherein the initialization information is obtained from an extension area of a sequence header. | 03-25-2010 |
20100080291 | MOVING PICTURE ENCODING APPARATUS AND MOVING PICTURE DECODING APPARATUS - A prediction control unit determines whether to use intra-prediction method or a method of prediction based on reduced image in which a predicted image is generated using a locally decoded image of a block as an object of coding that has been coded and reduced, according to the amount of high-frequency component contained in the block as the object of coding. When use of intra-prediction method is determined, locally decoded images of previously-encoded neighboring blocks stored in a frame memory are down-sampled by a down-sampling unit and subjected to intra-prediction by an intra-prediction unit, and coding is done using the prediction data. When use of prediction method based of reduced image is determined, inter-layer prediction is done using neighboring images obtained by reading locally decoded images resulting from a process of a lower layer from the frame memory, and coding is done using the prediction data. | 04-01-2010 |
20100080292 | Video Rate Control for Video Coding Standards - A method and device for improving rate controlling in video coding of sequences including a series of Inter frames separated by Intra frames, when a decoding delay is considered, comprise for each Inter frame of the series: computing a target frame size, computing a maximum buffer level related to a position of each Inter frame relative to a previous Intra frame and an upcoming Intra frame, and optimizing a transmission buffer level in response to the computed target frame size and the computed maximum buffer level. | 04-01-2010 |
20100080293 | Method and apparatus for decoding/encoding a video signal - The method includes the steps of receiving the multiview video data stream including a random access picture including a random access slice, the random access slice referencing only slice corresponding to a same time and a different view of the random access picture, obtaining identification information representing the multi-view video data stream including initialization information of a reference picture list for the random access slice, obtaining initialization information of a reference picture list for the random access slice based on the identification information, the initialization information representing a reference relation between a plurality of views with view number information and view identification information, initializing the reference picture list using the view number information and the view identification information, obtaining a difference value from the a multi-view video data stream according to the type information, the difference value representing a residual of inter-view reference index in the initialized reference picture list, determining an assignment modification value for modifying the inter-view reference index in the initialized reference picture list according to the difference value, modifying the initialized reference picture list for inter-view prediction using the determined assignment modification value, determining a prediction value of a macroblock in the random access picture based on the modified reference picture list, and decoding the macroblock using the prediction value, wherein the initialization information is obtained from an extension area of a sequence header. | 04-01-2010 |
20100086026 | ADAPTIVE DECIMATION FILTER - An initial decimation filter is applied to an original frame to generate a decimated frame. An optimized prediction filter is extracted from both the decimated frame and the original frame, while the initial decimation filter is held fixed. A predicted from is generated from the optimized prediction filter and the decimated frame, and an optimize decimation filter is extracted from the decimated frame and the predicted frame, while the optimized prediction filter remains fixed. | 04-08-2010 |
20100086027 | EFFICIENT PREDICTION MODE SELECTION - In generally, techniques are described for efficiently selecting a prediction mode by which to predict predictive video data from reference video data. In particular, an apparatus may include a memory that stores at least a first and second reference coded unit that each includes a first and second reference video data unit, respectively. The apparatus may further comprise a motion compensation unit that performs default weighted prediction to predict a first version of a predictive video data unit from the first and second reference video data units and calculates an offset value for the first version of the predictive video data unit. The motion compensation unit may then perform, based on the calculated offset value, either implicit weighted prediction or explicit weighted prediction to predict a second version of the predictive video data unit and encode the predictive video data unit as either the first or second version. | 04-08-2010 |
20100086028 | VIDEO ENCODING AND DECODING METHOD AND APPARATUS - A video encoding apparatus includes a predictor to perform prediction for an input image signal to generate a prediction image signal, a subtractor to calculate a difference between the input image signal and the prediction image signal to generate a prediction residual signal, a transformer to transform the prediction residual signal to generate a transform coefficient, a modulating unit to perform modulation on a quantization matrix to obtain a modulated quantization matrix, a quantizer to quantize the transform coefficient using the modulated quantization matrix to generate a quantized transform coefficient, and an encoder to encode the quantized transform coefficient and a modulation index to generate encoded data. | 04-08-2010 |
20100086029 | VIDEO CODING WITH LARGE MACROBLOCKS - Techniques are described for encoding and decoding digital video data using macroblocks that are larger than the macroblocks prescribed by conventional video encoding and decoding standards. For example, the techniques include encoding and decoding a video stream using macroblocks comprising greater than 16×16 pixels, for example, 64×64 pixels. In one example, an apparatus includes a video encoder configured to encode a video block having a size of more than 16×16 pixels, generate block-type syntax information that indicates the size of the block, and generate a coded block pattern value for the encoded block, wherein the coded block pattern value indicates whether the encoded block includes at least one non-zero coefficient. The encoder may set the coded block pattern value to zero when the encoded block does not include at least one non-zero coefficient or set the coded block pattern value to one when the encoded block includes a non-zero coefficient. | 04-08-2010 |
20100086030 | VIDEO CODING WITH LARGE MACROBLOCKS - Techniques are described for encoding and decoding digital video data using macroblocks that are larger than the macroblocks prescribed by conventional video encoding and decoding standards. For example, the techniques include encoding and decoding a video stream using macroblocks comprising greater than 16×16 pixels, for example, 64×64 pixels. Each macroblock may be partitioned into two or more partitions, and two or more of the partitions may be encoded using different modes. In one example, an apparatus includes a video encoder configured to receive a video block having a size of more than 16×16 pixels, partition the block into partitions, encode one of the partitions using a first encoding mode, encode another of the partitions using a second encoding mode different from the first encoding mode, and generate block-type syntax information that indicates the size of the block and identifies the partitions and the encoding modes used to encode the partitions. | 04-08-2010 |
20100086031 | VIDEO CODING WITH LARGE MACROBLOCKS - Techniques are described for encoding and decoding digital video data using macroblocks that are larger than the macroblocks prescribed by conventional video encoding and decoding standards. For example, the techniques include encoding and decoding a video stream using macroblocks comprising greater than 16×16 pixels, for example, 64×64 pixels. In one example, an apparatus includes a video encoder configured to receive a video coding unit, determine a first rate-distortion metric for encoding the video coding unit using first video blocks with sizes of 16×16 pixels, determine a second rate-distortion metric for encoding the video coding unit using second video blocks with sizes of more than 16×16 pixels, encode the video coding unit using the first video blocks when the first rate-distortion metric is less than second rate-distortion metric, and encode the video coding unit using the second video blocks when the second rate-distortion metric is less than the first rate-distortion metric. | 04-08-2010 |
20100086032 | VIDEO CODING WITH LARGE MACROBLOCKS - Techniques are described for encoding and decoding digital video data using macroblocks that are larger than the macroblocks prescribed by conventional video encoding and decoding standards. For example, the techniques include encoding and decoding a video stream using macroblocks comprising greater than 16×16 pixels. In one example, an apparatus includes a video encoder configured to encode a coded unit comprising a plurality of video blocks, wherein at least one of the plurality of video blocks comprises a size of more than 16×16 pixels and to generate syntax information for the coded unit that includes a maximum size value, wherein the maximum size value indicates a size of a largest one of the plurality of video blocks in the coded unit. The syntax information may also include a minimum size value. In this manner, the encoder may indicate to a decoder the proper syntax decoder to apply to the coded unit. | 04-08-2010 |
20100086033 | IMAGE PREDICTION APPARATUS AND METHOD, IMAGE ENCODING APPARATUS, AND IMAGE DECODING APPARATUS - An image predicting apparatus used in an image encoding apparatus or decoding apparatus and performing encoding or decoding of an image while performing image prediction processing for each macroblock, the image predicting apparatus comprises: a characteristic amount image extracting unit extracting characteristic amount image data from predicted image data obtained as a result of the image prediction processing; a characteristic amount image adjusting unit adjusting the characteristic amount image data according to the predicted image data; and a predicted image combining unit combining the adjusted characteristic amount image data obtained from the characteristic amount image adjusting unit and the predicted image data and outputting the composite predicted image. | 04-08-2010 |
20100086034 | METHOD AND AN APPARATUS FOR PROCESSING A VIDEO SIGNAL - The present invention relates to a video signal decoding method for adding an intra prediction mode as a sub-macroblock type to prediction of a macroblock in coding a video signal. The present invention includes obtaining a macroblock type, obtaining a sub-macroblock type when a macroblock includes a plurality of coded sub-macroblocks according the macroblock type, obtaining flag information indicating a DC (discrete cosine) transform size, determining the DC transform size of the coded sub-macroblock based on the flag information, when the sub-macroblock is intra prediction coded based on the sub-macroblock type, determining a prediction size of the intra prediction coded sub-macroblock based on the determined DC transform size, obtaining prediction direction information from a block adjacent to the sub-macroblock based on the prediction size of the sub-macroblock, and obtaining a prediction value of the sub-macroblock based on the prediction direction information. Accordingly, the present invention is able to raise coding efficiency of video signal by adding an intra prediction mode as a sub-macroblock type in predicting a macroblock. | 04-08-2010 |
20100086035 | METHOD AND AN APPARATUS FOR PROCESSING A VIDEO SIGNAL - The present invention relates to a video signal decoding method for adding an intra prediction mode as a sub-macroblock type to prediction of a macroblock in coding a video signal. The present invention includes obtaining a macroblock type, checking whether a macroblock includes a intra prediction coded sub-macroblock and a inter prediction coded sub-macroblock when a macroblock includes a plurality of coded sub-macroblocks according the macroblock type, when the macroblock includes the ultra prediction coded sub-macroblock and the inter prediction coded sub-macroblock, obtaining prediction mode flag information indicating whether the sub-macroblock is the intra prediction coded or the inter prediction coded, when the sub-macroblock is the intra prediction coded based on the prediction mode flag information, obtaining prediction direction information from a block adjacent to the sub-macroblock and a prediction value of the sub-macroblock based on the prediction direction information, and when the sub-macroblock is inter prediction coded based on the prediction mode flag information, obtaining motion information from the block adjacent to the sub-macroblock and a prediction value of the sub-macroblock based on the motion information. Accordingly, the present invention is able to raise coding efficiency of video signal by adding an intra prediction mode as a sub-macroblock in predicting a macroblock. | 04-08-2010 |
20100086036 | Method and apparatus for decoding/encoding a video signal - The method includes the steps of receiving the multiview video data stream including a random access picture including a random access slice, the random access slice referencing only slice corresponding to a same time and a different view of the random access picture, obtaining initialization information of a reference picture list for the random access slice, the initialization information representing a reference relation between a plurality of views with view number information and view identification information, initializing the reference picture list for inter-view prediction by appending an inter-view reference index to an initialized reference picture list for temporal prediction, the inter-view reference index being appended based on the view number information and the view identification information, obtaining a difference value from the a multi-view video data stream according to the type information, the difference value representing a residual of inter-view reference index in the initialized reference picture list;
| 04-08-2010 |
20100086037 | VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination. | 04-08-2010 |
20100086038 | VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination. | 04-08-2010 |
20100086039 | VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination. | 04-08-2010 |
20100086040 | VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination. | 04-08-2010 |
20100086041 | VIDEO ENCODING/ DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination. | 04-08-2010 |
20100086042 | VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination. | 04-08-2010 |
20100086043 | VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination. | 04-08-2010 |
20100086044 | VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination. | 04-08-2010 |
20100086045 | VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination. | 04-08-2010 |
20100086046 | VIDEO ENCODING/ DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination. | 04-08-2010 |
20100091843 | Method and apparatus for decoding/encoding a video signal - The method includes the steps of receiving the multiview video data stream including a random access picture including a random access slice, the random access slice referencing only slice corresponding to a same time and a different view of the random access picture, obtaining identification information representing the multi-view video data stream including initialization information of a reference picture list for the random access slice, obtaining initialization information of a reference picture list for the random access slice based on the identification information, the initialization information representing a reference relation between a plurality of views with view number information and view identification information, initializing the reference picture list using the view number information and the view identification information, obtaining modification information for the intitialized reference picture list from a multi-view video data stream, the modification information representing how to assign an inter-view reference index in the initialized reference picture list, determining an assignment modification value for modifying the inter-view reference index in the initialized reference picture list according to the modification information, modifying the initialized reference picture list for inter-view prediction using the determined assignment modification value, determining a prediction value of a macroblock in the random access picture based on the modified reference picture list, and decoding the macroblock using the prediction value, wherein the initialization information is obtained from an extension area of a sequence header. | 04-15-2010 |
20100091844 | Method and apparatus for decoding/encoding a video signal - The method includes the steps of receiving the multiview video data stream including a random access picture including a random access slice, the random access slice referencing only slice corresponding to a same time and a different view of the random access picture, obtaining initialization information of a reference picture list for the random access slice, the initialization information representing a reference relation between a plurality of views with view number information and view identification information, initializing the reference picture list for inter-view prediction by appending an inter-view reference index to an initialized reference picture list for temporal prediction, the inter-view reference index being appended based on the view number information and the view identification information, obtaining modification information for the intitialized reference picture list from a multi-view video data stream, the modification information representing how to assign an inter-view reference index in the initialized reference picture list, determining an assignment modification value for modifying the inter-view reference index in the initialized reference picture list according to the modification information, modifying the initialized reference picture list for inter-view prediction using the determined assignment modification value, determining a prediction value of a macroblock in the random access picture based on the modified reference picture list, and decoding the macroblock using the prediction value, wherein the initialization information is obtained from an extension area of a sequence header. | 04-15-2010 |
20100091845 | Method and apparatus for decoding/encoding a video signal - The method includes the steps of receiving the multiview video data stream including a random access picture including a random access slice, the random access slice referencing only slice corresponding to a same time and a different view of the random access picture, obtaining identification information representing the multi-view video data stream including initialization information of a reference picture list for the random access slice, obtaining initialization information of a reference picture list for the random access slice based on the identification information, the initialization information representing a reference relation between a plurality of views with view number information and view identification information, initializing the reference picture list using the view number information and the view identification information, obtaining a difference value from the a multi-view video data stream according to the type information, the difference value representing a residual of inter-view reference index in the initialized reference picture list, determining an assignment modification value for modifying the inter-view reference index in the initialized reference picture list according to the difference value, modifying the initialized reference picture list for inter-view prediction using the determined assignment modification value, determining a prediction value of a macroblock in the random access picture based on the modified reference picture, list, and decoding the macroblock using the prediction value, wherein the initialization information is obtained based on a value indicating decoding order between the plurality of views. | 04-15-2010 |
20100091846 | IMAGE PREDICTION/ENCODING DEVICE, IMAGE PREDICTION/ENCODING METHOD, IMAGE PREDICTION/ENCODING PROGRAM, IMAGE PREDICTION/DECODING DEVICE, IMAGE PREDICTION/DECODING METHOD, AND IMAGE PREDICTION DECODING PROGRAM - An objective is to provide an image predictive encoding device, image predictive encoding method, image predictive encoding program, image predictive decoding device, image predictive decoding method, and image predictive decoding program for selecting a plurality of candidate prediction signals, without increase in information amount. A weighting unit | 04-15-2010 |
20100091847 | VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination. | 04-15-2010 |
20100091848 | VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination. | 04-15-2010 |
20100091849 | VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination. | 04-15-2010 |
20100091850 | VIDEO ENCODING/ DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination. | 04-15-2010 |
20100091851 | VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination. | 04-15-2010 |
20100091852 | VIDEO ENCODING/ DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination. | 04-15-2010 |
20100091853 | VIDEO ENCODING/ DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination. | 04-15-2010 |
20100091854 | VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination. | 04-15-2010 |
20100091855 | VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination. | 04-15-2010 |
20100091856 | VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination. | 04-15-2010 |
20100098156 | WEIGHTED PREDICTION BASED ON VECTORIZED ENTROPY CODING - This disclosure describes methods that control the selection of predictive coding techniques for enhancement layer video blocks based on characteristics of vectorized entropy coding for such enhancement layer video blocks. In accordance with this disclosure, the predictive techniques used for predictive-based video coding of enhancement layer video blocks are dependent upon the vectorized entropy coding used for such enhancement layer the video blocks. For each coded unit, predictive coding techniques (e.g. weighted or non-weighted prediction) may be selected depending upon whether the vectorized entropy coding defines a single vector for the video blocks of that coded unit or multiple vectors for the video blocks of that coded unit. | 04-22-2010 |
20100098157 | METHOD AND AN APPARATUS FOR PROCESSING A VIDEO SIGNAL - A method of decoding a video signal is disclosed. The present invention includes obtaining IC (Illumination Compensation) difference information of a neighbor block of a current block, when information associated with illumination compensation for the current block is not available in a bitstream, deriving IC difference information of the current block using the IC difference information of the neighbor block, deriving an IC flag indicating whether illumination compensation is performed on the current block, based on the IC difference information of the current block, and performing the illumination compensation on the current block, based on the IC difference information of the current block and the IC flag. | 04-22-2010 |
20100098158 | VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination. | 04-22-2010 |
20100098159 | VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination. | 04-22-2010 |
20100098160 | VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination. | 04-22-2010 |
20100104009 | METHODS AND SYSTEMS FOR IMPROVING NETWORK RESPONSE DURING CHANNEL CHANGE - In response to a channel change command in a home network, to reduce latency a real time network bandwidth determination is made and if the determination indicates that bandwidth is sufficient to support only I-frame transmission, then only I-frames are sent temporarily from the source to the sink. Otherwise, I and P frames only are sent and may he encoded at a faster than normal frame rate and displayed at a lower than normal frame rate. If the sink is not configured for non-standard groups of pictures (GOP) some of the P frames can be indicated to the sink as being B-frames. | 04-29-2010 |
20100104010 | REAL-TIME RATE-CONTROL METHOD FOR VIDEO ENCODER CHIP - The present invention discloses a real-time rate-control method for a video encoder chip, wherein a BU-based RC algorithm is realized in a pipeline architecture, and wherein the RC algorithm is divided into an UpdateQP part arranged before the IME stage and an UpdateModel part arranged behind the entropy stage. When a currently processed frame contains a plurality of macro blocks, the bits used by several leading macro blocks and the remaining bits are predicted. Only the average value of the MADs of the preceding frame is stored in the memory. Thereby, memory consumption is greatly reduced, and quantization parameters are obtained to predict the bit number required by the next frame. The present invention further defines a region of interest and automatically regulates the bit distribution ratio thereof to enhance the sharpness thereof. | 04-29-2010 |
20100104011 | MOVING PICTURE CODING METHOD - A moving picture coding method for coding a moving picture includes: determining a luminance change (S | 04-29-2010 |
20100104012 | Method and apparatus for decoding/encoding a video signal - A method of decoding a video signal is disclosed. The present invention includes obtaining identification information indicating whether a coded picture of a current NAL unit is an inter-view picture group, obtaining interview reference information of the inter-view picture group, and constructing a reference picture list for inter-view prediction using the inter-view reference information according to the identification information, wherein the inter-view reference information includes view identification information of an inter-view reference picture. | 04-29-2010 |
20100111166 | DEVICE FOR DECODING A VIDEO STREAM AND METHOD THEREOF - A device is disclosed having a motion vector processing module to determine a first set of motion vectors associated with a macroblock of a video picture. A motion vector reduction module determines a second set of motion vectors, based on the first set of motion vectors, associated the macroblock, the second set having fewer motion vectors than the first set. A decode module comprising an input completes decoding of the macroblock based upon the second set of motion vectors | 05-06-2010 |
20100111167 | METHOD AND APPARATUS FOR ENCODING AND/OR DECODING BIT DEPTH SCALABLE VIDEO DATA USING ADAPTIVE ENHANCEMENT LAYER PREDICTION - A scalable video bitstream may have an H.264/AVC compatible base layer (BL) and a scalable enhancement layer (EL), where scalability refers to color bit depth. The SVC standard allows spatial inter-layer prediction, wherein a residual in the EL is generated which is then intra coded. Another spatial intra-coding mode for EL is pure intra coding (I_N×N). The invention discloses a new intra-coding mode and two new inter coding modes, particularly for bit depth scalability. The new intra coding mode uses encoding of the residual between upsampled reconstructed BL and original EL, using mode selection. Two possible modes are residual prediction from BL and additional intra-coding of this residual. The new inter coding modes use also prediction of EL from reconstructed BL. In a first inter coding mode, the residual is encoded using Motion Estimation based on this residual. In a second inter coding mode, the residual is encoded using upsampled motion information from the BL. | 05-06-2010 |
20100111168 | DATA COMMUNICATION UNIT, DATA COMMUNICATION NETWORK AND METHOD OF DECODING - A wireless communication unit comprises a receiver for receiving information from a remote transmitter unit. The receiver comprises a demodulator for demodulating received data packets operably coupled to a decoder arranged to perform a cyclic redundancy check (CRC) on the demodulated received data packets and perform multi-protocol encapsulated (MPE) decoding thereon. The demodulator forwards both valid CRC corrected data packets and non-corrected CRC data packets to the decoder and the decoder is configured to place the MPE non-corrected CRC data packets into Reed Solomon (RS) code words. | 05-06-2010 |
20100111169 | Method and apparatus for decoding/encoding a video signal - The method includes the steps of receiving the multiview video data stream including a random access picture including a random access slice, the random access slice referencing only slice corresponding to a same time and a different view of the random access picture, obtaining initialization information of a reference picture list for the random access slice, the initialization information representing a reference relation for a single direction or a bi-direction between a plurality of views with view number information and view identification information, obtaining type information indicating whether the random access slice is predicted for a single direction or a bi-direction, initializing the reference picture list using the view number information and the view identification information according to the type information, obtaining modification information for the initialized reference picture list from a multi-view video data stream, the modification information representing how to assign an inter-view reference index in the initialized reference picture list, determining an assignment modification value for modifying the inter-view reference index in the initialized reference picture list according to the modification information, modifying the initialized reference picture list for inter-view prediction using the determined assignment modification value, determining a prediction value of a macroblock in the random access picture based on the modified reference picture list, and decoding the macroblock using the prediction value, wherein the initialization information is obtained from an extension area of a sequence header. | 05-06-2010 |
20100111170 | Method and apparatus for decoding/encoding a video siganl - A method of decoding a video signal is disclosed. The present invention includes obtaining identification information indicating whether a coded picture of a current NAL unit is an inter-view picture group, obtaining interview reference information of the inter-view picture group, and constructing a reference picture list for inter-view prediction using the inter-view reference information according to the identification information, wherein the inter-view reference information includes view identification information of an inter-view reference picture. | 05-06-2010 |
20100111171 | Method and apparatus for decoding/encoding a video signal - A method of decoding a video signal is disclosed. The present invention includes obtaining identification information indicating whether a coded picture of a current NAL unit is an inter-view picture group, obtaining interview reference information of the inter-view picture group, and constructing a reference picture list for inter-view prediction using the inter-view reference information according to the identification information, wherein the inter-view reference information includes view identification information of an inter-view reference picture. | 05-06-2010 |
20100111172 | Method and apparatus for decoding/encoding a video signal - A method of decoding a video signal is disclosed. The present invention includes obtaining identification information indicating whether a coded picture of a current NAL unit is an inter-view picture group, obtaining interview reference information of the inter-view picture group, and constructing a reference picture list for inter-view prediction using the inter-view reference information according to the identification information, wherein the inter-view reference information includes view identification information of an inter-view reference picture. | 05-06-2010 |
20100111173 | Method and apparatus for decoding/encoding a video signal - A method of decoding a video signal is disclosed. The present invention includes obtaining identification information indicating whether a coded picture of a current NAL unit is an inter-view picture group, obtaining interview reference information of the inter-view picture group, and constructing a reference picture list for inter-view prediction using the inter-view reference information according to the identification information, wherein the inter-view reference information includes view identification information of an inter-view reference picture. | 05-06-2010 |
20100111174 | Method and apparatus for decoding/encoding a video signal - A method of decoding a video signal is disclosed. The present invention includes obtaining identification information indicating whether a coded picture of a current NAL unit is an inter-view picture group, obtaining interview reference information of the inter-view picture group, and constructing a reference picture list for inter-view prediction using the inter-view reference information according to the identification information, wherein the inter-view reference information includes view identification information of an inter-view reference picture. | 05-06-2010 |
20100111175 | REFERENCE DATA BUFFER FOR INTRA-PREDICTION OF DIGITAL VIDEO - Encoding or decoding digital video frames in intra-prediction mode by selecting column reference data locations for blocks adjacent a current block from a column reference data buffer storing column reference data samples for no more than two macro blocks of the frame. In some cases, the column reference data buffer may include a storage size for samples of a first column of data of blocks of one macro block of luminance samples. Encoding and decoding may also include selecting row reference data locations for blocks adjacent a current block from a row reference data buffer storing row reference data samples for at least one row of macro blocks of the frame. In some cases, the row reference data buffer may include storage for samples of a first row of data of fourteen successive blocks spanning two rows. The concept can be applied to various video processing components and standards. | 05-06-2010 |
20100111176 | VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination. | 05-06-2010 |
20100111177 | VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination. | 05-06-2010 |
20100111178 | VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination. | 05-06-2010 |
20100111179 | VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination. | 05-06-2010 |
20100118938 | ENCODER AND METHOD FOR GENERATING A STREAM OF DATA - A method generates a stream of data, wherein the stream comprises a plurality of encoded data blocks. The encoded data blocks comprise a plurality of self-contained blocks including all information for decoding the block and a plurality of blocks including only partial information for decoding. The distance of the self-contained blocks in the stream is varied dependent on the content encoded in the stream. The stream is a main stream, and wherein tuning into the main stream is effected via a secondary stream comprising at least a subset of the data blocks of the main stream encoded at a quality different from a quality of the data blocks of the main stream. The self-contained blocks are inserted at positions in the main stream where differences in the quality of the data encoded in the main stream and in the secondary stream are less detectable. | 05-13-2010 |
20100118939 | PREDICTED REFERENCE INFORMATION GENERATING METHOD, VIDEO ENCODING AND DECODING METHODS, APPARATUSES THEREFOR, PROGRAMS THEREFOR, AND STORAGE MEDIA WHICH STORE THE PROGRAMS - When video images are processed by applying temporal or spatial interframe prediction encoding to each divided area, and generating a predicted image of a processing target area based on a reference frame of the processing target area and reference information which indicates a predicted target position of the processing target area in the reference frame, predicted reference information is generated as predicted information of the reference information. Reference information used when an area adjacent to the processing target area was processed is determined as predicted reference information prediction data used for predicting the reference information of the processing target area. Reference area reference information is generated using one or more pieces of reference information used when a reference area indicated by the prediction data was processed. The predicted reference information prediction data is updated using the reference area reference information. The predicted reference information is generated using one or more pieces of the updated predicted reference information prediction data. | 05-13-2010 |
20100118940 | ADAPTIVE REFERENCE PICTURE DATA GENERATION FOR INTRA PREDICTION - A device incorporates an H.264 compatible video encoder for providing compressed, or encoded, video data. The H.264 encoder comprises a buffer for storing previously coded macroblocks of a current picture being encoded; and a processor for generating adaptive reference picture data from the previously coded macroblocks of the current picture; wherein the adaptive reference picture data is for use in predicting uncoded macroblocks of the current picture. | 05-13-2010 |
20100118941 | FRAME ACCURATE SWITCHING - A system comprising a decoder arrangement to decode a plurality of video sequences including a first video sequence and a second video sequence, each of the video sequences including a plurality of frames including a first plurality of reference frames and a second plurality of non-reference frames, a selector operationally connected to the decoder arrangement, the selector being operative to select which of the video sequences is outputted to a display device for display, wherein during at least some of the time while the decoder arrangement is decoding the second video sequence which is selected for output to the display device, the decoder arrangement is operative to selectively decode the first video sequence, and then the selector is operative to switch to selecting the first video sequence for outputting to the display device for display. Related apparatus and methods are also described. | 05-13-2010 |
20100118942 | METHODS AND APPARATUS AT AN ENCODER AND DECODER FOR SUPPORTING SINGLE LOOP DECODING OF MULTI-VIEW CODED VIDEO - There are provided methods and apparatus at an encoder and decoder for supporting single loop decoding of multi-view coded video. An apparatus includes an encoder for encoding multi-view video content to enable single loop decoding of the multi-view video content when the multi-view video content is encoded using inter-view prediction. Similarly, a method is also described for encoding multi-view video content to support single loop decoding of the multi-view video content when the multi-view video content is encoded using inter-view prediction. Corresponding decoder apparatus and method are also described. | 05-13-2010 |
20100118943 | METHOD AND APPARATUS FOR ENCODING AND DECODING IMAGE - An image encoding apparatus includes a multidirectional predicting unit configured to predict a plurality of pixel blocks by using an encoded pixel as a reference pixel according to a plurality of prediction modes having different prediction directions to generate a plurality of first prediction signals corresponding to the pixel blocks obtained by dividing a frame of an input image signal a setting unit configured to set a weighting factor depending on the prediction directions of the plurality of prediction modes and a spatial distance between a prediction pixel in the pixel block and the reference pixel, a weighted average unit configured to calculate a weighted average of the plurality of first prediction signals according to the weighting factor to generate one second prediction signal corresponding to the pixel blocks, and an encoding unit configured to encode a prediction residual error signal representing a difference between an image signal of the pixel block and at least the second prediction signal to generate encoded data. | 05-13-2010 |
20100118944 | PICTURE INFORMATION CODING DEVICE AND CODING METHOD - In a picture information coding device for outputting picture compression information based on an AVC encoding scheme, optimum reference relationships in a GOP structure including hierarchical B pictures can be obtained and random access from an I picture that is not an instantaneous decoding refresh picture can be performed. | 05-13-2010 |
20100118945 | METHOD AND APPARATUS FOR VIDEO ENCODING AND DECODING - An video encoding apparatus includes a dividing unit | 05-13-2010 |
20100118946 | VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination. | 05-13-2010 |
20100118947 | DECODER FOR SELECTIVELY DECODING PREDETERMINED DATA UNITS FROM A CODED BIT STREAM - A decoder ( | 05-13-2010 |
20100118948 | METHOD AND APPARATUS FOR VIDEO PROCESSING USING MACROBLOCK MODE REFINEMENT - Apparatus and methods for processing (e.g., transrating) one or more compressed video bitstreams including mode refinement analysis. In one embodiment, a method of transrating a digital video picture having a plurality of input macroblocks, each input macroblock having at least first and second attributes (e.g., slice type, encoding mode, and a “skipped” mode) is disclosed. In one variant, the method comprises generating an output macroblock corresponding to each input macroblock, with each of the output macroblocks having the first and second attributes. For each output macroblock having a first value for the first attribute (e.g., slice type), the second attribute (e.g., encoding mode) is decided at least in part by evaluating one or more error criteria, the error criteria being responsive to the second attribute of a corresponding input macroblock. | 05-13-2010 |
20100118949 | VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination. | 05-13-2010 |
20100118950 | VIDEO ENCODING/ DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination. | 05-13-2010 |
20100118951 | VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination. | 05-13-2010 |
20100118952 | VIDEO ENCODING/ DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination. | 05-13-2010 |
20100118953 | VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination. | 05-13-2010 |
20100124276 | METHOD AND APPARATUS FOR DETECTING VIDEO FIELD SEQUENCE - A method and apparatus for detecting a video field sequence and a video processing system are provided. The method includes: calculating a difference D | 05-20-2010 |
20100128779 | METHOD AND APPARATUS FOR SPLICING IN A COMPRESSED VIDEO BITSTREAM - Methods and apparatus for splicing multiple video streams together. In one embodiment, two compressed video bit streams having one or more disparate qualities, such as bit rate, format, field parity, etc., are spliced together to form a single video bit stream that is free from any significant artifact. In one variant, a splicing boundary is located (e.g., at an I-frame or P-frame of a first stream), and the second stream spliced in at that point. A correction (e.g., addition or deletion of a frame) is then applied. In one implementation, the process maintains compliance with H.264 requirements. | 05-27-2010 |
20100128780 | METHOD AND SYSTEM FOR SECURELY TRANSMITTING AND RECEIVING MULTIMEDIA CONTENT - A method and a system for transmitting and receiving multimedia content includes identifying the Intra coded frames (I-frames) from a combination of the I-frames, predicted frames (P-frames), and bi-directional predicted frames (B-frames). The method comprises scrambling Intra coded frames selectively, generating multimedia content comprising scrambled information of the I-frames, and transmitting the multimedia content. The method further comprises receiving the multimedia content and &scrambling the I-frames selectively. The system comprises transmitting unit including a selective scrambler, and a processor including an encoding unit and a decoding unit. The system further comprises a receiving unit including selective a descrambler. | 05-27-2010 |
20100128781 | METHOD AND APPARATUS FOR CODING AND DECODING USING BIT-PRECISION - Discussed are a method and an apparatus of encoding/decoding by using a bit precision. In accordance to an aspect of the present invention, it is possible to encoding and decoding an image or a video by using a bit precision. Accordingly, compression efficiency can be improved and the decoding complexity can be reduced by encoding/decoding video data by use of the bit precision. | 05-27-2010 |
20100128782 | VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination. | 05-27-2010 |
20100128783 | VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination. | 05-27-2010 |
20100128784 | VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination. | 05-27-2010 |
20100128785 | VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination. | 05-27-2010 |
20100135387 | METHOD AND APPARATUS FOR CONTEXT DEPENDENT MERGING FOR SKIP-DIRECT MODES FOR VIDEO ENCODING AND DECODING - There are provided methods and apparatus for context dependent merging for SKIP/DIRECT modes for video encoding and decoding. An apparatus includes an encoder for joint coding partitions of an image region using frame partitioning and a partition merging procedure, wherein any given one of the partitions that use a coding mode with implicit coding rules is subject to being merged, with another one of the partitions, using a distinct merging rule different than that used for a coding mode with explicit coding rules. | 06-03-2010 |
20100135388 | SINGLE LOOP DECODING OF MULTI-VIEW CODED VIDEO ( amended - There are provided methods and apparatus at an encoder and decoder for supporting single loop decoding of multi-view coded video. An apparatus includes an encoder for encoding multi-view video content to enable single loop decoding of the multi-view video content when the multi-view video content is encoded using inter-view prediction. Similarly, a method is also described for encoding multi-view video content to support single loop decoding of the multi-view video content when the multi-view video content is encoded using inter-view prediction. Corresponding decoder apparatus and method are also described. | 06-03-2010 |
20100135389 | METHOD AND APPARATUS FOR IMAGE ENCODING AND IMAGE DECODING - An image encoding apparatus includes a transform/quantization unit configured to perform transform and quantization with respect to a prediction error signal indicative of a difference value between a predicted image signal and an input image signal in order to generate a quantized transform coefficient, a encoding unit configured to perform entropy encoding with respect to the quantized transform coefficient in order to generate encoded data, a derivation unit configured to derive prediction complexity indicative of a degree of complication of the prediction processing, a determination unit configured to determine filtering strength for a locally decoded image signal to become low as the prediction complexity increases, a filter unit configured to perform deblocking filter processing with respect to the locally decoded image signal in accordance with the filtering strength, and a storage unit configured to store the locally decoded image signal after the deblocking filter processing. | 06-03-2010 |
20100135390 | VIDEO CODING - Improved video coding is described to encode video data within a sequence of video frames. To this end, at least a portion of a reference frame is encoded to include motion information associated with the portion of the reference frame. At least a portion of a predictable frame that includes video data predictively correlated to said portion of said reference frame is defined based on the motion information. At least said portion of the predictable frame is encoded without including corresponding motion information and including mode identifying data. The mode identifying data indicate that the encoded portion of the predictable frame can be directly derived using at least the motion information associated with the portion of the reference frame. | 06-03-2010 |
20100135391 | METHODS AND APPARATUS FOR MOTION SKIP MOVE WITH MULTIPLE INTER-VIEW REFERENCE PICTURES - There are provided methods and apparatus for motion skip mode with multiple inter-view reference pictures. An apparatus includes an encoder for encoding an image block relating to multi-view video content by performing a selection, for the image block, of at least one of an inter-view reference picture list from a set of inter-view reference picture lists, an inter-view reference picture from among a set of inter-view reference pictures, and a disparity vector from among a set of disparity vectors corresponding to the inter-view reference picture. The encoder extracts motion information for the image block based on at least one of the inter-view reference picture list, the inter-view reference picture, and disparity vector. | 06-03-2010 |
20100142615 | METHOD AND APPARATUS FOR SCALABLE VIDEO ENCODING AND DECODING - Disclosed is a scalable video coding algorithm. A method for video coding includes temporally filtering frames in the same sequence to a decoding sequence thereof to remove temporal redundancy, obtaining and quantizing transformation coefficients from frames whose temporal redundancy is removed, and generating bitstreams. A video encoder comprises a temporal transformation unit, a spatial transformation unit, a quantization unit and a bitstream generation unit to perform the method. A method for video decoding is basically reverse in sequence to the video coding. A video decoder extracts information necessary for video decoding by interpreting the received bitstream and decoding it. Thus, video streams may be generated by allowing a decoder to decode the generated bitstreams, while maintaining the temporal scalability on an encoder-side. | 06-10-2010 |
20100150229 | Method of Encoding and Decoding Video Images With Spatial Scalability - The invention relates to a method of encoding and decoding video images with spatial scalability. The inventive method comprises the following steps consisting in: encoding ( | 06-17-2010 |
20100150230 | VIDEO CODING SYSTEM USING SUB-CHANNELS AND CONSTRAINED PREDICTION REFERENCES TO PROTECT AGAINST DATA TRANSMISSION ERRORS - A coding technique is disclosed in which frames of a video sequence are assigned to one of a plurality of sub-channels to be transmitted to a decoder. The frames are coded according to predictive coding techniques such that ordinarily prediction references of the frames in each sub-channel only reach the reference frames that occur within the same sub-channel. Thus, if transmission errors arise with respect to one sub-channel, decoding may occur for other sub-channels until the transmission error is detected and corrected. The decoder may also try to reconstruct the frames in the failed sub-channel by interpolating from the frames in other channels. Furthermore, when feedback scheme is available between the encoder and decoder, the encoder may restart the failed sub-channel by coding the next frames in the sub-channel by predicting from correctly received frames in other sub-channels. And the encoder and decoder may resume normal encoding and decoding once the restart frame is sent and received, respectively. Additionally, the encoder and decoder can maintain an identical and correctly received long-term reference frame that can be used to restart all sub-channels in cases all sub-channels are corrupted at one point. The long-term reference frame can be refreshed periodically. | 06-17-2010 |
20100150231 | APPARATUS FOR REFERENCE PICTURE RESAMPLING GENERATION AND METHOD THEREOF AND VIDEO DECODING SYSTEM USING THE SAME - The exemplary embodiments of the present invention are direct to a method for generating a resampling reference picture and an apparatus and video decoding system using this method. The video image decoding system is used to decode a bit stream, so as to obtain a current frame. The method for generating a resampling reference picture includes following steps: (a) looking ahead specific information of next x frames of the current frame in the bit stream; (b) determining whether to generate a resampling reference picture according to the specific information of the next x frames. | 06-17-2010 |
20100150232 | METHOD FOR CONCEALING A PACKET LOSS - A method of concealing a packet loss during video decoding is provided. An input stream having a plurality of network abstraction layer units NAL is received. A loss of a network abstraction layer unit in a group of pictures in the input stream is detected. A valid network abstraction layer unit order from the available network abstraction layer units is outputted. The network abstraction layer unit order is received by a video coding layer (VCL) and data is outputted. | 06-17-2010 |
20100150233 | FAST MODE DECISION APPARATUS AND METHOD - A fast mode decision apparatus includes a data storage for storing therein data on a reference picture, a per-mode calculator for computing values on a macroblock to be encoded and a mode decision unit for determining an optimal encoding mode for the macroblock to be encoded based on the values computed by the per-mode calculator and data on the reference picture stored in the data storage. The apparatus further includes a mode deactivator for deactivating P8×8 mode I4×4 mode, wherein the mode decision unit selects, as the optimal encoding mode, one among modes other than the modes deactivated by the mode deactivator. | 06-17-2010 |
20100150234 | Method and apparatus for decoding/encoding a video signal - A method of decoding a video signal is disclosed. The present invention includes obtaining identification information indicating whether a coded picture of a current NAL unit is an inter-view picture group, obtaining interview reference information of the inter-view picture group, and constructing a reference picture list for inter-view prediction using the inter-view reference information according to the identification information, wherein the inter-view reference information includes view identification information of an inter-view reference picture. | 06-17-2010 |
20100150235 | Method and apparatus for decoding/encoding a video signal - A method of decoding a video signal is disclosed. The present invention includes obtaining identification information indicating whether a coded picture of a current NAL unit is an inter-view picture group, obtaining interview reference information of the inter-view picture group, and constructing a reference picture list for inter-view prediction using the inter-view reference information according to the identification information, wherein the inter-view reference information includes view identification information of an inter-view reference picture. | 06-17-2010 |
20100150236 | Method and apparatus for decoding/encoding a video signal - A method of decoding a video signal is disclosed. The present invention includes obtaining identification information indicating whether a coded picture of a current NAL unit is an inter-view picture group, obtaining interview reference information of the inter-view picture group, and constructing a reference picture list for inter-view prediction using the inter-view reference information according to the identification information, wherein the inter-view reference information includes view identification information of an inter-view reference picture. | 06-17-2010 |
20100158110 | Methods and Apparatus for Weighted Prediction in Scalable Video Encoding and Decoding - There are provided methods and apparatus for weighted prediction in scalable video encoding and decoding. A scalable video encoder includes an encoder ( | 06-24-2010 |
20100158111 | Method for insertion of data, method for reading of inserted data - The invention relates to a method for insertion of data in a block of image data, called the current block, of a sequence of images. The current block is coded or intended to be coded in the form of temporally predicted image data from prediction image data defined according to a first prediction mode According to the invention, the insertion method comprises the modification, according to the data to be inserted, of the first prediction mode into a second prediction mode different from the first prediction mode with a view to coding of the current block according to the second prediction mode, the second prediction mode being defined so that the prediction image data obtained with the second prediction mode are identical to the prediction image data obtained with the first prediction mode. | 06-24-2010 |
20100158112 | Method and apparatus for decoding/encoding a video siganl - A method of decoding a video signal is disclosed. The present invention includes obtaining identification information indicating whether a coded picture of a current NAL unit is an inter-view picture group, obtaining interview reference information of the inter-view picture group, and constructing a reference picture list for inter-view prediction using the inter-view reference information according to the identification information, wherein the inter-view reference information includes view identification information of an inter-view reference picture. | 06-24-2010 |
20100158113 | Method and apparatus for decoding/encoding a video signal - A method of decoding a video signal is disclosed. The present invention includes obtaining identification information indicating whether a coded picture of a current NAL unit is an inter-view picture group, obtaining interview reference information of the inter-view picture group, and constructing a reference picture list for inter-view prediction using the inter-view reference information according to the identification information, wherein the inter-view reference information includes view identification information of an inter-view reference picture. | 06-24-2010 |
20100158114 | Method and apparatus for decoding/encoding a video signal - A method of decoding a video signal is disclosed. The present invention includes obtaining identification information indicating whether a coded picture of a current NAL unit is an inter-view picture group, obtaining interview reference information of the inter-view picture group, and constructing a reference picture list for inter-view prediction using the inter-view reference information according to the identification information, wherein the inter-view reference information includes view identification information of an inter-view reference picture. | 06-24-2010 |
20100158115 | METHOD AND APPARATUS FOR CODING AND DECODING USING BIT-PRECISION - Disclosed are a method and an apparatus of encoding/decoding by using a bit precision. In accordance to an aspect of the present invention, it is possible to encoding and decoding an image or a video by using a bit precision. Accordingly, compression efficiency can be improved and the decoding complexity can be reduced by encoding /decoding video data by use of the bit precision. | 06-24-2010 |
20100166067 | Method for Prediction Coding Using Scalable Video Codec - Provided is a method for prediction coding using scalable video codec, which can support various chrominance spaces. A method for prediction coding includes setting a target layer based on corresponding device information on a specific image service request, performing a chrominance space conversion on an image signal of a base layer using a chrominance space conversion equation preset in a scalable video codec selectively according to whether a chrominance space conversion is necessary in prediction coding between the base layer and the target layer, and performing inter-layer prediction coding through an additional signal conversion based on necessary any one of spatial scalability, chroma-format scalability and bit-depth scalability. | 07-01-2010 |
20100166068 | System and Method for Multi-Stream Video Compression Using Multiple Encoding Formats - A computer-implemented system and method are described for performing video compression. For example, a method according to one embodiment comprises: encoding a plurality of video frames or portions thereof according to a first encoding format, the first encoding format being optimized for transmission to a client device over a current communication channel; transmitting the plurality of encoded video frames or portions to the client device over the communication channel; concurrently encoding the first plurality of video frames according to a second encoding format, the second encoding format having a relatively higher-quality compressed video and/or a lower compression ratio than the first encoding format; storing the first plurality of video frames encoded in the second encoding format on a storage device; and making the first plurality of video frames encoded in the second encoding format available to the client device and other client devices for playback of the video stream. | 07-01-2010 |
20100172411 | HIGH DYNAMIC RANGE CODECS - A method for encoding high dynamic ränge (HDR) images involves providing a lower dynamic ränge (LDR) image, generating a prediction function for estimating the values for pixels in the HDR image based on the values of corresponding pixels in the LDR image, and obtaining a residual frame based on differences between the pixel values of the HDR image and estimated pixel values. The LDR image, prediction function and residual frame can all be encoded in data from which either the LDR image of HDR image can be recreated. | 07-08-2010 |
20100172412 | VIDEO ENCODER AND VIDEO DECODER - A video encoder that encodes each of a plurality of blocks obtained by dividing an input image, includes: a definition unit configured to define a valid area which is allowed to be used as reference in a reference image in interframe coding; a detection unit configured to detect a reference area in the reference image for a target block; a predicted image generation unit configured to generate a predicted image by outputting an image of the reference area for the reference area belonging to the valid area and outputting a complementary image for the reference area not belonging to the valid area; and a coding unit configured to encode the input image using the predicted image, wherein valid area information indicating the valid area is transmitted to a video decoder, for each group of a plurality of blocks. | 07-08-2010 |
20100172413 | VIDEO DECODER AND DIGITAL BROADCAST TRANSRECEIVER - A video decoder includes a storage unit that stores therein vector data; and a video generating unit that, when an input stream is abnormal, generates based on data before the input stream became abnormal and the vector data stored in the storage unit, an image that is an image displayed using the data before the input stream became abnormal and to which motion has been added. | 07-08-2010 |
20100177821 | Moving picture coding apparatus - A moving picture coding apparatus divides a picture into basic blocks and generates a prediction image of a block to be predicted in a basic block by using adjacent pixels in reference pixel blocks adjacent to the block to be predicted as reference pixels to perform predictive coding of a moving picture. When some of the reference pixels are not available, pixel values of the reference pixels that are not available are calculated based on pixels in the reference pixel blocks. The prediction image of the block to be predicted is generated by using the calculated pixel values instead of the reference pixels that are not available. | 07-15-2010 |
20100177822 | FILTER PREDICTION BASED ON ACTIVITY METRICS IN VIDEO CODING - This disclosure describes techniques associated with filtering of video data in a video encoding and/or decoding process. In accordance with this disclosure, filtering is applied at an encoder, and filter information is encoded in the bitstream to identify the filtering that was applied at the encoder. Different types of filtering may be applied based on an activity metric determined for the video data. Moreover, in accordance with this disclosure, the manner in which the filter information is encoded into the bitstream may be dependent on the activity metric. In particular, for a first range of the activity metric, one or more filters are encoded directly, and for a second range of the activity metric, one or more filters are predictively encoded. | 07-15-2010 |
20100189177 | VIDEO ENCODING METHOD AND DECODING METHOD, APPARATUSES THEREFOR, PROGRAMS THEREFOR, AND STORAGE MEDIA WHICH STORE THE PROGRAMS - A video encoding apparatus used in encoding of a multi-viewpoint image. The apparatus generates a synthetic image for a camera used for obtaining an encoding target image, by using an already-encoded reference camera image having a viewpoint different from the viewpoint of the camera used for obtaining the encoding target image, and disparity information between the reference camera image and the encoding target image, thereby encoding the encoding target image. A predicted image for a differential image between an input image of an encoding target area to be encoded and the synthetic image generated therefor is generated, and a predicted image for the encoding target area, which is represented by the sum of the predicted differential image and the synthetic image for the encoding target area, is generated. A prediction residual represented by a difference between the predicted image for the encoding target area and the encoding target image of the encoding target area is encoded. | 07-29-2010 |
20100195721 | LOCAL PICTURE IDENTIFIER AND COMPUTATION OF CO-LOCATED INFORMATION - Video decoding innovations for using local picture identifiers and computing co-located information are described. In one aspect, a decoder identifies reference pictures in a reference picture list of a temporal direct prediction mode macroblock that match reference pictures used by a co-located macroblock using local picture identifiers. In another aspect, a decoder determines whether reference pictures used by blocks are the same by comparing local picture identifiers during calculation of boundary strength. In yet another aspect, a decoder determines a picture type of a picture and based on the picture type selectively skips or simplifies computation of co-located information for use in reconstructing direct prediction mode macroblocks outside the picture. | 08-05-2010 |
20100195722 | IMAGE PREDICTION ENCODING DEVICE, IMAGE PREDICTION DECODING DEVICE, IMAGE PREDICTION ENCODING METHOD, IMAGE PREDICTION DECODING METHOD, IMAGE PREDICTION ENCODING PROGRAM, AND IMAGE PREDICTION DECODING PROGRAM - An object is to efficiently depress mode information for identification of a prediction method even if there are a lot of prediction methods provided as to methods of generating intra-frame prediction signals in a pixel domain. An image prediction encoding device | 08-05-2010 |
20100195723 | MOVING IMAGE ENCODER AND MOVING IMAGE DECODER - The encoding efficiency when a plurality of reference blocks are used to generate prediction blocks for encoding is improved. A moving image encoder performs inter-picture predictive encoding to encode a difference value from a block to be encoded by generating a prediction image of the block to be encoded by using a plurality of reference images extracted from an encoded frame. The moving image encoder comprises a prediction method candidate generating portion | 08-05-2010 |
20100195724 | VIDEO COMPRESSION ENCODING/DECOMPRESSION DEVICE, VIDEO COMPRESSION ENCODING/DECOMPRESSION PROGRAM AND VIDEO GENERATION/OUTPUT DEVICE - When a periodic pattern is not included in image data | 08-05-2010 |
20100195725 | VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination. | 08-05-2010 |
20100195726 | VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination. | 08-05-2010 |
20100195727 | VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination. | 08-05-2010 |
20100195728 | VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination. | 08-05-2010 |
20100195729 | VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination. | 08-05-2010 |
20100202518 | METHOD AND APPARATUS FOR COMPUTING A SLIDING SUM OF ABSOLUTE DIFFERENCES - A logic circuit is configured to calculate a sliding sum of absolute differences of a plurality of numbers from a plurality of members respectively selected successively from all members of a sequence of numbers. | 08-12-2010 |
20100202519 | Method and apparatus for decoding/encoding a video signal - A method of decoding a video signal is disclosed. The present invention includes obtaining identification information indicating whether a coded picture of a current NAL unit is an inter-view picture group, obtaining interview reference information of the inter-view picture group, and constructing a reference picture list for inter-view prediction using the inter-view reference information according to the identification information, wherein the inter-view reference information includes view identification information of an inter-view reference picture. | 08-12-2010 |
20100202520 | VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination. | 08-12-2010 |
20100208802 | IMAGE ENCODING DEVICE, IMAGE ENCODING METHOD, IMAGE DECODING DEVICE, IMAGE DECODING METHOD, PROGRAM, AND STORAGE MEDIUM - A prediction set determining section ( | 08-19-2010 |
20100208803 | IMAGE ENCODING AND DECODING APPARATUSES, IMAGE ENCODING AND DECODING METHODS, PROGRAMS THEREOF, AND RECORDING MEDIA RECORDED WITH THE PROGRAMS - A method for encoding an image using an intraframe prediction is provided which includes selecting a gradient of a pixel value that is indicated by an image signal to be predicted among a plurality of gradient candidates, generating a predicted signal by applying a gradient in accordance with the distance from a prediction reference pixel based on the gradient, intraframe-encoding the image signal to be predicted based on the predicted signal, and encoding information indicating the size of the selected gradient. Alternatively, the method includes estimating the gradient of a pixel value that is indicated by an image signal to be predicted based on an image signal which has already been encoded, generating a predicted signal by applying a gradient in accordance with the distance from a prediction reference pixel based on the gradient, and intraframe-encoding the image signal to be predicted based on the predicted signal. | 08-19-2010 |
20100208804 | MODIFIED ENTROPY ENCODING FOR IMAGES AND VIDEOS - A method and encoder for entropy encoding image data using a dynamically determined coding order, and a method and decoder for entropy decoding encoded data encoded using a dynamically determined coding order. The coding order for encoding quantized transform domain coefficients is dynamically determined for the image based on at least one characteristic of the quantized transform domain coefficients. The characteristic may be quantization step size if non-uniform quantization is employed for blocks of data. | 08-19-2010 |
20100208805 | ADAPTIVE QUANTIZATION WITH BALANCED PIXEL-DOMAIN DISTORTION DISTRIBUTION IN IMAGE PROCESSING - Methods and encoders and decoders for adaptively quantizing transform domain coefficients in image and/or video encoding/decoding. For an image having a number of blocks, each block having N coefficients, the quantization step size for each coefficient is selected dynamically, thus resulting in a quantizer that may apply different step sizes to different coefficients. The selected step sizes for each coefficient are used for those coefficients within all blocks in the image/frame. In one aspect, the step sizes are selected on the basis of balancing pixel domain distortion when the image/frame is decoded. | 08-19-2010 |
20100208806 | IN-LOOP DEBLOCKING FOR INTRA-CODED IMAGES OR FRAMES - Methods and encoders/decoders for applying in-loop deblocking to intra-coded images/frames. In a decoding context, a deblocking filter is applied to reconstructed pixels of an intra-coded block prior to decoding the subsequent block in the decoding sequence. In an encoding context, a deblocking filter is applied to reconstructed pixels of an intra-coded block in an inter-coding loop before encoding a subsequent block in the coding order for the image. | 08-19-2010 |
20100208807 | METHOD AND DEVICE FOR AVOIDING ROUNDING ERRORS AFTER PERFORMING AN INVERSE DISCRETE ORTHOGONAL TRANSFORMATION - The present invention provides a method for avoiding rounding errors during rounding of values after performing an inverse discrete orthogonal transformation. In a first step, a block of coefficients (F′[u][v]) is transformed into a block of image pixel values (f′[y][x]) by means of an inverse discrete orthogonal transformation, wherein each image pixel comprises an image pixel value. In a second step, a product of the block of image pixel values (f′[y][x]) with a first pixel pattern (A[y][x]) is calculated. In a third step, the product values of the second step are summed up to a first sum (Sum | 08-19-2010 |
20100208808 | Apparatus and Method for Coding an Information Signal into a Data Stream, Converting the Data Stream and Decoding the Data Stream - More customization and adaptation of coded data streams may be achieved by processing the information signal such that the various syntax structures obtained by pre-coding the information signal are placed into logical data packets, each of which being associated with a specific data packet type of a predetermined set of data packet types, and by defining a predetermined order of data packet types within one access unit of data packets. The consecutive access units in the data stream may, for example, correspond to different time portions of the information signal. By defining the predetermined order among the data packet types it is possible, at decoder's side, to detect the borders between successive access units even when removable data packets are removed from the data stream on the way from the data stream source to the decoder without incorporation of any hints into the reminder of the data stream. Due to this, decoders surely detect the beginnings and endings of access units and therefore are not liable to a buffer overflow despite a removal of data packets from the data stream before arrival at the decoder. | 08-19-2010 |
20100208809 | METHODS AND APPARATUS FOR INTER-LAYER RESIDUE PREDICTION FOR SCALABLE VIDEO - There are provided methods and apparatus for inter-layer residue prediction for scalable video. An apparatus is described for an encoder for encoding a block of a picture, or a decoder for decoding a block of a picture, by applying inverse tone mapping to an inter-layer residue prediction process for the block, wherein the inverse tone mapping is performed in the pixel domain. Methods for encoding or decoding a block of a picture are also described; and performed by applying inverse tone mapping to an inter-layer residue prediction process for the block, wherein the inverse tone mapping is performed in the pixel domain. | 08-19-2010 |
20100208810 | METHOD AND APPARATUS FOR INTER-LAYER RESIDUE PREDICTION FOR SCALABLE VIDEO - There are provided methods and apparatus for inter-layer residue prediction for scalable video. An apparatus is described for an encoder for encoding a block of a picture, or a decoder for decoding a block of a picture, by applying inverse tone mapping to an inter-layer residue prediction process for the block, wherein the inverse tone mapping is performed in the pixel domain. Methods for encoding or decoding a block of a picture are also described; and performed by applying inverse tone mapping to an inter-layer residue prediction process for the block, wherein the inverse tone mapping is performed in the pixel domain. | 08-19-2010 |
20100208811 | IMAGE CODING APPARATUS WITH SEGMENT CLASSIFICATION AND SEGMENTATION-TYPE MOTION PREDICTION CIRCUIT - A segmenting section divides an input image into a plurality of segments. A hierarchizing section determines classes of the respective segments according to a predetermined criterion, and produces a class identification signal indicating the classes of the respective segments. A coding section encodes the segmented image signal into code data while changing the value of a coding control parameter for each of the segments in accordance with the class identification signal. Examples of the coding control parameter are a coding time interval and precision of quantization. | 08-19-2010 |
20100208812 | IMAGE CODING APPARATUS WITH SEGMENT CLASSIFICATION AND SEGMENTATION-TYPE MOTION PREDICTION CIRCUIT - A segmenting section divides an input image into a plurality of segments. A hierarchizing section determines classes of the respective segments according to a predetermined criterion, and produces a class identification signal indicating the classes of the respective segments. A coding section encodes the segmented image signal into code data while changing the value of a coding control parameter for each of the segments in accordance with the class identification signal. Examples of the coding control parameter are a coding time interval and precision of quantization. | 08-19-2010 |
20100208813 | IMAGE CODING APPARATUS WITH SEGMENT CLASSIFICATION AND SEGMENTATION-TYPE MOTION PREDICTION CIRCUIT - A segmenting section divides an input image into a plurality of segments. A hierarchizing section determines classes of the respective segments according to a predetermined criterion, and produces a class identification signal indicating the classes of the respective segments. A coding section encodes the segmented image signal into code data while changing the value of a coding control parameter for each of the segments in accordance with the class identification signal. Examples of the coding control parameter are a coding time interval and precision of quantization. | 08-19-2010 |
20100215100 | Method and Apparatus for Decoding/Encoding a Video Signal - The present invention provides a video signal decoding method including the steps of checking an encoding scheme of the video signal, reading attribute information for the video signal, and decoding an inter-view picture group existing on a same time zone using the attribute information. | 08-26-2010 |
20100215101 | METHOD AND AN APPARATUS FOR PROCESSING A VIDEO SIGNAL - A method of processing a video signal is disclosed. The present invention includes extracting an overlapping window coefficient from a video signal bitstream, applying a window to at least one reference area within a reference picture using the overlapping window coefficient, obtaining a reference block by overlapping the window applied at least one reference area multiply, and obtaining a predictor of a current block using the reference block. | 08-26-2010 |
20100215102 | VIDEO ENCODING METHOD AND DECODING METHOD, APPARATUSES THEREFOR, PROGRAMS THEREFOR, AND STORAGE MEDIA WHICH STORE THE PROGRAMS - An image encoding method for encoding a pixel value of an encoding target by using a predicted value generated by means of spatial or temporal prediction using a previously-decoded image. The method performs prediction of the pixel value of the encoding target and obtains the predicted value; computes data of a probability distribution which indicates what value an original pixel value has for the obtained predicted value, by shifting, in accordance with the predicted value, difference distribution data of a difference between the original pixel value and the predicted value in predictive encoding, where the difference distribution data is stored in advance; clips the obtained data of the probability distribution so as to contain the data in a range from a lower limit to an upper limit for possible values of the original pixel value; and encodes the pixel value of the encoding target by using the clipped data of the probability distribution of the original pixel value from the lower limit to the upper limit. | 08-26-2010 |
20100220784 | Video Encoding Method and Decoding Method, Apparatuses Therefor, Programs Therefor, and Storage Media for Storing the Programs - By using parallax compensation which performs prediction by using parallax between video images, the video images are encoded as a single video image. Reference parallax for a target image to be encoded is set, wherein the reference parallax is estimated using a reference image; area division in an image frame is set; parallax displacement for each divided area is set, wherein the parallax displacement is the difference between the reference parallax and parallax for the parallax compensation; data of the area division is encoded; and data for indicating the parallax displacement is encoded. During decoding, reference parallax for a target image to be decoded is set, wherein it is estimated using a reference image; data for indicating area division, which is included in encoded data, is decoded; and data of parallax displacement, which is included in the encoded data, is decoded for each area indicated by the area division data. | 09-02-2010 |
20100226431 | Video encoder and decoder apparatus deciding error in transform coefficients between an original image and a predictive image - A video encoder apparatus using a distributed video coding (DVC) includes a Wyner-Ziv frame encoder for forming a predictive image of a Wyner-Ziv frame on the basis of coded key frames, and determining, according to the fallibility of the transform coefficients of the predictive image with respect to the transform coefficients of an original image based on the Wyner-Ziv frame, the amount of error correction codes to be transmitted so as to transmit the error correction codes corresponding to the determined amount. When no errors are found between the transform coefficients of the original image of the Wyner-Ziv frame and the predictive image, information indicating that no errors are found is sent out instead of the error correction codes for the Wyner-Ziv frame in question. | 09-09-2010 |
20100226432 | INTERPOLATION FILTERING METHOD, IMAGE CODING METHOD, IMAGE DECODING METHOD, INTERPOLATION FILTERING APPARATUS, PROGRAM, AND INTEGRATED CIRCUIT - An interpolation filtering method includes selecting (S | 09-09-2010 |
20100232499 | METHOD OF DETERMINING AN IMAGE DISTRIBUTION FOR A LIGHT FIELD DATA STRUCTURE - The invention relates to a method of determining an image distribution (D | 09-16-2010 |
20100232500 | IMPROVEMENT FOR SPATIAL WYNER ZIV CODING | 09-16-2010 |
20100232501 | VIDEO ENCODING/DECODING METHOD AND APPARATUS FOR MOTION COMPENSATION PREDICTION - A video encoding method and apparatus to select one combination, for each block of an input video signal, from a plurality of combinations. Each combination includes a predictive parameter and at least one reference picture number determined in advance for the reference picture. A prediction picture signal is generated in accordance with the reference picture number and predictive parameter of the selected combination. A predictive error signal is generated representing an error between the input video signal and the prediction picture signal. Encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination is included. | 09-16-2010 |
20100232502 | VIDEO ENCODING/DECODING METHOD AND APPARATUS FOR MOTION COMPENSATION PREDICTION - A video encoding method and apparatus to select one combination, for each block of an input video signal, from a plurality of combinations. Each combination includes a predictive parameter and at least one reference picture number determined in advance for the reference picture. A prediction picture signal is generated in accordance with the reference picture number and predictive parameter of the selected combination. A predictive error signal is generated representing an error between the input video signal and the prediction picture signal. Encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination is included. | 09-16-2010 |
20100239000 | Camera Coupled Reference Frame - Techniques are provided for managing long-term reference frames (LTRFs) for two or more video sources. A first video source is selected from a plurality of video sources. The first video source is encoded to produce an encoded video stream, where a reference frame message identifies a recent video frame as long-term reference frame (LTRF) associated with the first video stream. The process is repeated for other video streams. The LTRF associated with the first video stream is used as a reference for temporal predictive coding upon receiving a signal that the first video source has been re-selected. | 09-23-2010 |
20100239001 | VIDEO STREAMING SYSTEM, TRANSCODING DEVICE, AND VIDEO STREAMING METHOD - A video streaming system includes a streaming server ( | 09-23-2010 |
20100239002 | METHOD AND AN APPARATUS FOR PROCESSING A VIDEO SIGNAL - A method of processing a video signal is disclosed. The present invention includes receiving prediction mode information of a current block, generating a half pel using an integer pel of a neighbor block, and generating a predictor of the current block using the half pel and the prediction mode information. | 09-23-2010 |
20100239003 | WYNER ZIV CODING | 09-23-2010 |
20100239004 | VIDEO ENCODING/DECODING METHOD AND APPARATUS FOR MOTION COMPENSATION PREDICTION - A video encoding method and apparatus to select one combination, for each block of an input video signal, from a plurality of combinations. Each combination includes a predictive parameter and at least one reference picture number determined in advance for the reference picture. A prediction picture signal is generated in accordance with the reference picture number and predictive parameter of the selected combination. A predictive error signal is generated representing an error between the input video signal and the prediction picture signal. Encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination is included. | 09-23-2010 |
20100239005 | VIDEO ENCODING/DECODING METHOD AND APPARATUS FOR MOTION COMPENSATION PREDICTION - A video encoding method and apparatus to select one combination, for each block of an input video signal, from a plurality of combinations. Each combination includes a predictive parameter and at least one reference picture number determined in advance for the reference picture. A prediction picture signal is generated in accordance with the reference picture number and predictive parameter of the selected combination. A predictive error signal is generated representing an error between the input video signal and the prediction picture signal. Encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination is included. | 09-23-2010 |
20100246672 | METHOD AND APPARATUS FOR HIERARCHICAL BI-DIRECTIONAL INTRA-PREDICTION IN A VIDEO ENCODER - Method and apparatus for hierarchical bi-directional intra-prediction in a video encoder is described. In some examples, initial reference blocks are selected in an image. Sets of blocks in the image are predicted successively over a plurality of stages based on a respectively plurality of templates, each of the plurality of templates including reference blocks selected from at least one of: the initial reference blocks; or previously encoded and reconstructed blocks of the image. The image is encoded in the video encoder using the initial reference blocks and the sets of blocks as predicted. | 09-30-2010 |
20100246673 | DYNAMIC IMAGE RECEIVING APPARATUS, DYNAMIC IMAGE RECEIVING METHOD AND PROGRAM - To provide a dynamic image receiving apparatus which receives dynamic image streams coded with inter-frame prediction such as MPEG from a plurality of channels, and collects the dynamic image streams containing intra-frame coded pictures from each channel in a short time. The dynamic image receiving apparatus includes: a time information accumulative processing device which accumulates code receiving time of the intra-frame coded picture of the dynamic image stream, and periodicity time information containing one of or both of presentation time information and decoding time information contained in the dynamic image stream for each dynamic image stream of the plurality of channels; code receiving time predicting devices which predict the code receiving time of the intra-frame coded pictures based on the periodicity time information; and a channel selection control device which controls channel selection of the dynamic image stream to be received based on the predicted code receiving time information. | 09-30-2010 |
20100254452 | SYSTEM AND METHOD OF VIDEO DATA ENCODING WITH MINIMUM BASEBAND DATA TRANSMISSION - Just-in-time up-conversion utilizes frame tagging, and optionally pixel tagging, to minimize the data bandwidth required to drive a display. According to this approach video is maintained in its native frame rate until needed in the display device, such as for pixel control at the row/column drivers. By way of example, a frame tag comprises a repeat count and direction information upon which display refresh is based. In addition, pixel tagging can be utilized to dynamically configure the up-converter to generate pixel displacements within synthesized intermediate frames, such as based on different pixel layer representations. The data stream can utilize traditional fixed pixel lengths or variable pixel lengths to conserve additional bandwidth. | 10-07-2010 |
20100254453 | INVERSE TELECINE TECHNIQUES - This disclosure describes inverse telecine techniques that are performed to adjust or convert the frame rate of a video sequence. The described techniques provide a very useful way to identify a telecine technique that was used to increase the frame rate of a video sequence. Upon identifying the telecine technique that was used, the corresponding inverse telecine technique can be performed with respect to the sequence of video frames in order to decrease the frame rate back to its original form (prior to telecine). This disclosure also provides many useful details that can improve inverse telecine, e.g., by simplifying the inverse telecine process and by reducing memory accesses during the process. | 10-07-2010 |
20100254454 | Apparatus for decoding video compression coded data - A decoding apparatus includes a standard predicted image generating unit which generates a standard decoded image and a standard predicted image of standard image quality; a non-standard decoded image generating unit which generates a non-standard decoded image different in image quality based on a prediction error information; a non-standard predicted image generating unit which generates a non-standard predicted image different in image quality based on the non-standard decoded image; and a correction value calculating unit which calculates correction values corresponding to differences between the standard and non-standard predicted images. The non-standard decoded image generating unit includes a predicted image reconstructing unit which corrects the non-standard predicted image, and a decoding unit which inverse-quantizes the prediction error information and adds the inverse-quantized prediction error information and the corrected non-standard predicted image to generate the non-standard decoded image. | 10-07-2010 |
20100254455 | IMAGE PROCESSING APPARATUS, IMAGE PROCESSING METHOD, AND PROGRAM - An image processing apparatus synchronizing a first video stream constituted of a plurality of image data items and a second video stream different from the first video stream, the image processing apparatus including a calculation section and a detection section. The calculation section calculates, based on a data size of each of the plurality of image data items constituting the first video stream and the data size of each of image data items constituting the second video stream, a correlation value that represents a degree of similarity between the plurality of image data items constituting the first video stream and the image data items constituting the second video stream. The detection section detects the image data items constituting the second video stream and corresponding to the plurality of image data items constituting the first video stream based on the correlation value. | 10-07-2010 |
20100254456 | DEVICE AND METHOD OF ENCODING MOVING IMAGE - An encoding device is a device for encoding a moving image and includes: an imaging unit that shoots a subject; an encoder circuit that encodes an input moving image; a stream buffer that accumulates the encoded data; a network circuit that transmits the encoded data in the stream buffer to a network; and a read position skipping unit that, when an accumulated amount of the accumulated data, which has been accumulated in the stream buffer, is greater than or equal to a threshold value, transmits the encoded data to the network after advancing a read position at which the encoded data is to be read to, for example, the head position of the latest I-picture. | 10-07-2010 |
20100254457 | METHOD OF IMPLEMENTING INTRA PREDICTION COMPUTATION APPLIED TO H.264 DIGITAL VIDEO CODING AND DEVICE - The present invention provides a method of implementing an intra prediction computation applied to the H.264 digital video coding and a device. The method according to present invention of implementing the intra prediction computation applied to the H.264 video coding comprises selecting an image block to be intra-predicted and extracting the neighboring pixel values of said block; determining the prediction mode of said block, and perform first adding operation on said neighboring pixel values when the prediction mode is one of Diagonal_Down_Left, Diagonal_Down_Right, Vertical_Right, Horizontal_Down, Vertical_Left, and Horizontal_Up; performing first shifting operation and second adding operation on the result of first adding operation respectively; performing second shifting operation on the result of second adding operation; selecting a corresponding value to output from the results of first and second shifting operation according to said prediction mode and size of block. The method and circuit device according to present invention will decrease most of the repeated calculations and improve the efficiency without greatly increasing the required chip real estate area. | 10-07-2010 |
20100260260 | SCALABLE VIDEO CODING SUPPORTING PIXEL VALUE REFINEMENT SCALABILITY - A more efficient way of enabling scalability in terms of pixel value resolution is achieved by temporally predicting a first and a second representation of a video material separately to each other with the first representation being of a lower pixel value resolution than the second representation, with mapping the first prediction residual or a reconstructed version thereof from the first pixel value resolution to the second pixel value resolution dependent on the second prediction signal obtained from temporally predicting the second representation, and by coding a second prediction residual being of the second pixel value resolution as representing a deviation between a combination of the second and third prediction signals and the second representation. | 10-14-2010 |
20100266011 | MOVING PICTURE PREDICTION METHOD, MOVING PICTURE CODING METHOD AND APPARATUS, AND MOVING PICTURE DECODING METHOD AND APPARATUS - A moving picture prediction method for enabling a calculation amount and a storage capacity to be reduced in a prediction about a moving picture by scaling processing is provided. A method for predicting the value P of Time T from the value P | 10-21-2010 |
20100266012 | DECODING AND PRESENTATION TIME STAMPS FOR MPEG-4 ADVANCED VIDEO CODING - A system, method, and apparatus for time stamping compressed video data is disclosed. A delay parameter is generated and can be encoded with the compressed video, representing the number of picture delay between the decoded sequence and the presented sequence. The presentation time stamp is associated with each of the pictures. The presentation time stamp is a function of the delay parameter and other parameters associated with picture associated therewith. | 10-21-2010 |
20100272174 | IMAGE DECODING DEVICE, IMAGE CODING DEVICE, IMAGE DECODING METHOD, IMAGE CODING METHOD, AND PROGRAM - An image decoding device is provided which is capable of decoding views coded using inter-view prediction even when decoding is not instantly completed. The image decoding device includes: a decoding processing unit ( | 10-28-2010 |
20100278233 | MOVING IMAGE ENCODING APPARATUS AND MOVING IMAGE ENCODING METHOD - There is provided a moving image encoding apparatus comprising: an encoding unit which encodes moving image data using inter-frame prediction, the moving image data being input by an image pickup unit which captures an object image, and generates an encoded bitstream; a setting unit which performs settings for an encoding process performed by the encoding unit; a transmitting unit which transmits setting information created by the setting unit to an external moving image encoding apparatus; a receiving unit which receives setting information for an encoding process transmitted by the external moving image encoding apparatus; and an encoding control unit which controls the encoding process performed by the encoding unit in accordance with a first setting made by the setting unit and a second setting based on the setting information received by the receiving unit. | 11-04-2010 |
20100278234 | APPARATUS FOR CODING OR DECODING INTRA IMAGE BASED ON LINE INFORMATION OF REFERENCE IMAGE BLOCK - An apparatus for coding an image which may effectively code the image and an apparatus for decoding an image which may decode the effectively coded image. The apparatus for coding the image includes: an input image segmentation unit to segment an input image into a plurality of image blocks including a first image block and a second image block; a waveform information generation unit to select a plurality of reference pixels from among pixels included in the first image block, generate first waveform information about the first image block based on a pixel value difference between the selected plurality of reference pixels, and generate second waveform information about the second image block based on a pixel value difference between the pixels included in the second image block; and coding unit to code an image included in the second image block based on the first waveform information and second waveform information. | 11-04-2010 |
20100278235 | VIDEO ENCODING/ DECODING METHOD AND APPARATUS FOR MOTION COMPENSATION PREDICTION - A video encoding method and apparatus to select one combination, for each block of an input video signal, from a plurality of combinations. Each combination includes a predictive parameter and at least one reference picture number determined in advance for the reference picture. A prediction picture signal is generated in accordance with the reference picture number and predictive parameter of the selected combination. A predictive error signal is generated representing an error between the input video signal and the prediction picture signal. Encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination is included. | 11-04-2010 |
20100284459 | APPARATUS FOR ENCODING AND DECODING IMAGE USING ADAPTIVE DCT COEFFICIENT SCANNING BASED ON PIXEL SIMILARITY AND METHOD THEREFOR - The present invention discloses an encoding apparatus using a Discrete Cosine Transform (DCT) scanning, which includes: a mode selection means for selecting an optimal mode for intra prediction; an intra prediction means for performing intra prediction onto video inputted based on the mode selected in the mode selection means; a DCT and quantization means for performing DCT and quantization onto residual coefficients of a block outputted from the intra prediction means; and an entropy encoding means for performing entropy encoding onto DCT coefficients acquired from the DCT and quantization by using a scanning mode decided based on pixel similarity of the residual coefficients. | 11-11-2010 |
20100284460 | VIDEO ENCODING WITH TEMPORALLY CONSTRAINED SPATIAL DEPENDENCY FOR LOCALIZED DECODING - This disclosure describes techniques for region-of-interest (ROI) encoding. In accordance with the techniques described herein, an encoding device may determine a temporal spatial dependency value for a candidate reference video block for inter-coding a current block in a video frame. The encoding device may compare the temporal spatial dependency value to a threshold value and select a coding mode for the current block based on the comparison. A decoding device may receive data defining a ROI as well as the temporal spatial dependency value and decode a video block in the ROI based at least in part on the temporal spatial dependency value. In this manner, the techniques of this disclosure may allow a video content viewer the ability to choose a ROI to watch. | 11-11-2010 |
20100284461 | Encoding Filter Coefficients - A method of encoding a plurality of adaptive filter coefficients ( | 11-11-2010 |
20100284462 | METHODS AND SYSTEMS FOR SIGNIFICANCE COEFFICIENT CODING IN VIDEO COMPRESSION - A method for decoding significance coefficients in an encoded video sequence is described. An encoded video bitstream is received. Codebook table information is retrieved from the bitstream. Significance symbols are decoded using the retrieved codebook table information. Significance coefficients are decoded using the significance symbols. A plurality of transform coefficients is dequantized. An inverse transform is applied to a residual signal. A video sequence is constructed. A method for coding significance coefficients in a video sequence is also described. | 11-11-2010 |
20100290525 | METHOD AND APPARATUS FOR ENCODING AND DECODING AT LEAST ONE IMAGE FRAME THAT IS ARTIFICIALLY INSERTED INTO IMAGE SEQUENCE - Provided are a method and apparatus for encoding and decoding at least one image frame artificially inserted by a user among a plurality of image frames of an image sequence by using a parameter regarding characteristics of the image frame. | 11-18-2010 |
20100290526 | Selecting Encoding Types and Predictive Modes for Encoding Video Data - In some embodiments, a method of determining encoding type and predictive mode(s) selections for a macroblock of a video frame is provided. In some embodiments, a general method 1) selects the encoding type (16×16 or 4×4) that is initially considered for a macroblock using an encoding type selection algorithm (based on an attribute of the macroblock that is easy to compute), 2) if the 16×16 encoding type is selected in step 1, consider the four 16×16 prediction modes that may be used on the macroblock using conventional methods or an improved 16×16 predictive mode search algorithm based on distortion thresholds, and 3) if the 4×4 encoding type is selected in step 1, select the 4×4 prediction mode to be used for each of the sixteen 4×4 blocks of the macroblock using conventional methods or an improved 4×4 predictive mode search algorithm based on the positional relationships between predictive modes. | 11-18-2010 |
20100296578 | SYSTEM AND METHOD FOR INTRACODING AND DECODING VIDEO DATA - A video system for coding a stream of video data that includes a stream of video frames divides each video frame into a matrix of a plurality of subblocks, wherein each subblock includes a plurality of pixels. The video system operates in accordance with nine prediction modes. Each prediction mode determines a prediction mode according to which a present subblock is to be coded. One of the nine prediction modes is selected to encode the present subblock, wherein the selected prediction mode provides for a minimum error value in the present subblock. | 11-25-2010 |
20100303151 | Method for decoding video signal encoded using inter-layer prediction - A method for receiving and decoding an encoded bitstream of a first layer and an encoded bitstream of a second layer into a video signal is provided. It is determined whether or not a block temporally coincident with a target block in a picture of the first layer is present in the bitstream of the second layer. An operation for checking information (intra_base_flag and residual_prediction_flag) indicating whether or not the target block has been predicted based on data of a block in a different layer corresponding to the target block is skipped if no block temporally coincident with the target block is present in the bitstream of the second layer. This method eliminates the need for encoders to transmit unnecessary information (intra_base_flag and residual_prediction_flag) when performing inter-layer prediction using a temporally adjacent frame. | 12-02-2010 |
20100303152 | Method And System For Decoding Digital Video Content Involving Arbitrarily Accessing An Encoded Bitstream - A technique for decoding an encoded bitstream of digital video content involves decoding a bitstream, wherein decoding the bitstream generates decoded syntax elements and decoded pixel information, creating an access point in the currently decoded bitstream by saving state information related to the decoding, saving the decoded syntax elements, and saving the decoded pixel information, and synchronizing a subsequent decoding operation to the access point utilizing the saved state information, the saved decoded syntax elements, and the saved decoded pixel information. | 12-02-2010 |
20100309976 | METHOD AND APPARATUS FOR ENHANCING REFERENCE FRAME SELECTION - A method and apparatus for selecting a reference frame for producing an encoded image. The method includes retrieving a histogram for a current frame, determining the difference between the histogram and a previous histogram, and calculating adaptive threshold utilizing the determined difference and encoding the frame as intra frame if it is an intra frame, and selecting a reference frame and encoding the frame as non-intra frame if the frame is a non-intra frame. | 12-09-2010 |
20100309977 | Adaptive Intra Mode Selection - In video encoding and decoding predictions may be generated by intra-frame prediction. Intra-frame prediction uses reconstructed pixels in a reconstructed frame. Intra-frame prediction is performed by extending the reconstructed pixels into a predicted block using intra-frame prediction modes, each intra-frame prediction mode indicating a direction of the extension. In order to reduce the number of possible intra-frame prediction modes, a subset is selected from a predetermined set of possible intra-frame prediction modes. A subset of intra-frame prediction modes can be created by forming preselection sets of intra-frame prediction modes on the basis of similarity of their associated predicted blocks and selecting a representative intra-frame prediction mode from each preselection set. | 12-09-2010 |
20100316121 | MULTI-VIEW VIDEO CODING/DECODING METHOD - A multi-view video coding method includes the following steps: an un-coded group of pictures (GOP) is obtained from an un-coded multi-view video. Wherein, the un-coded GOP includes picture sets of several un-coded views. Several present coding views are selected from the un-coded views according to view levels of the un-coded views. Wherein, picture sets of the present coding views includes several present coding pictures. A target coding picture is selected from the present coding pictures according to view levels of and temporal levels of the present coding pictures. At least a coded reference picture, which is referenced by the target coding picture for prediction, is obtained. The target coding picture is coded according to the coded reference picture. In addition, a multi-view video decoding method is also disclosed. | 12-16-2010 |
20100316122 | MULTIVIEW VIDEO CODING OVER MPEG-2 SYSTEMS - A multiplexer may produce an MPEG-2 (Motion Picture Experts Group) System standard bitstream comprising views with nonconsecutive view order indexes. In one example, an apparatus comprises a video encoder that encodes a plurality of views of a scene, a multiplexer that constructs a data structure for signaling that a corresponding MPEG-2 (Motion Picture Experts Group) System standard bitstream comprises a first view of the plurality of views of the scene associated with a first view order index and a second view of the plurality of views of the scene associated with a second view order index, wherein the first view order index and the second view order index are non-consecutive, and an output interface that outputs the data structure. | 12-16-2010 |
20100316123 | MOVING IMAGE CODING DEVICE, IMAGING DEVICE AND MOVING IMAGE CODING METHOD - A moving image coding device for performing inter-frame prediction coding can prevent memory traffic for reference images from increasing due to increase of an image size. The moving image coding device comprises a multiple frame parallel processing inter-frame prediction coding unit | 12-16-2010 |
20100322309 | METHOD FOR SPATIAL ERROR CONCEALMENT - A method for performing spatial error concealment is provided. The method includes the following steps: detecting a damaged macroblock; obtaining coding information of neighboring macroblocks of the damaged macroblock; determining edge feature of the damaged macroblock based on the coding information; and according to the edge feature, selecting a bilinear interpolation algorithm or a directional interpolation algorithm to conceal errors within the damaged macroblock. | 12-23-2010 |
20100322310 | Video Processing Method - A first video stream is analyzed for generating consecutive video segments. Each video segment indicates a specific scene in the video stream. A first intra frame is added at a start of each of the video segments, and second intra frames are inserted each fixed interval of video frames from the start of each of the video segments for spacing two consecutive second intra frames by the fixed interval of video frames in each of the video segments. | 12-23-2010 |
20100322311 | Method and System for Decoding Multiview Videos with Prediction Dependencies - Multiview videos are acquired of a scene with corresponding cameras arranged at poses, such that there is view overlap between any pair of cameras. V-frames are generated from the multiview videos. The V-frames are encoded using only spatial prediction. Then, the V-frames are inserted periodically in an encoded bit stream to provide random temporal access to the multiview videos. Additional view dependency information enables the decoding of a reduced number of frames prior to accessing randomly a target frame for a specified view and time, and decoding the target frame. The method also decodes multiview videos by maintaining a reference picture list for a current frame of a plurality of multiview videos, and predicting each current frame of the plurality of multiview videos according to reference pictures indexed by the associated reference picture list. | 12-23-2010 |
20100329334 | METHODS AND APPARATUS FOR IMPLICIT BLOCK SEGMENTATION IN VIDEO ENCODING AND DECODING - Methods and apparatus are provided for implicit block segmentation in video encoding and decoding. An apparatus includes an encoder for encoding at least a portion of a picture using a block segmentation process performed on a pixel difference of at least two predictors for the portion. The encoder implicitly signals block segmentation information for use by a decoder to decode the portion. | 12-30-2010 |
20100329335 | VIDEO ENCODING AND DECODING APPARATUS - According to one embodiment, a video encoding apparatus includes a setting module to set a filter coefficient for use in filtering in a video decoding apparatus, and to set a rounding offset for controlling rounding of operation in the filtering, and an encoder to output the filter coefficient and information of the rounding offset as encoded data. | 12-30-2010 |
20100329336 | METHOD AND APPARATUS FOR ENCODING AND DECODING BASED ON INTER PREDICTION USING IMAGE INPAINTING - Provided are a method and apparatus for encoding and decoding based on inter prediction. In the method of encoding based on inter prediction, image inpainting is performed by searching for at least one reference picture by using pixels that are adjacent to the boundary between a current block and a previously encoded region of a current picture and are included in the previously encoded region, and the current block is encoded based on a predicted block obtained as the result of performing image inpainting. Accordingly, it is possible to precisely generate a predicted block, thereby improving the compression rate of image encoding. | 12-30-2010 |
20110002383 | MOVING IMAGE CODING/DECODING SYSTEM AND MOVING IMAGE CODING APPARATUS AND MOVING IMAGE DECODING APPARATUS USED THEREIN - An image quality/rate control portion | 01-06-2011 |
20110002384 | VIDEO ENHANCEMENT USING RECURSIVE BANDLETS - A wavelet transform is applied to successive images of a video sequence to obtain wavelet coefficients for each image, and directions of regularity are estimated in association with the wavelet coefficients. Recursive weights are also determined to be associated with the wavelet coefficients. An average multiscale bandlet coefficient associated with a wavelet coefficient for a current image is computed from this wavelet coefficient, the recursive weight associated therewith and a corresponding average multiscale bandlet coefficient computed for a previous image and associated with a wavelet coefficient offset according to the direction of regularity associated with the wavelet coefficient. The average multiscale bandlet coefficients can then be processed to produce an enhanced bandlet image to which an inverse wavelet transform is applied. The determination of a recursive weight associated with a wavelet coefficient for the current image comprises checking a condition between this wavelet coefficient and the corresponding average multiscale bandlet coefficient computed for the previous image, and updating a value of the recursive weight depending on the condition. | 01-06-2011 |
20110007799 | NON-ZERO ROUNDING AND PREDICTION MODE SELECTION TECHNIQUES IN VIDEO ENCODING - In one aspect of this disclosure, techniques are described for selecting among default weighted prediction, implicit weighted prediction, and explicit weighted prediction. In this context, techniques are also described for adding offset to prediction data, e.g., using the format of explicit weighted prediction to allow for offsets to predictive data that is otherwise determined by implicit or default weighted prediction. | 01-13-2011 |
20110007800 | METHODS AND APPARATUS FOR ILLUMINATION COMPENSATION OF INTRA-PREDICTED VIDEO - There are provided methods and apparatus for illumination compensation of intra-predicted video. An apparatus includes an encoder for encoding a picture using non-local intra prediction. The encoder includes an illumination compensation processing unit for applying illumination compensation to predicted data obtained from the non-local intra prediction. | 01-13-2011 |
20110013694 | VIDEO QUALITY OBJECTIVE ASSESSMENT METHOD, VIDEO QUALITY OBJECTIVE ASSESSMENT APPARATUS, AND PROGRAM - A bit string of a video encoded using motion-compensated inter-frame prediction and DCT and, more particularly, H.264 is received. A quantization parameter included in the received bit string is extracted, and its statistic is calculated. The subjective quality of the video is estimated based on the minimum value of the quantization parameter. | 01-20-2011 |
20110019739 | Method for modeling coding information of a video signal to compress/decompress the information - A method and an apparatus of decoding a video signal are provided. The present invention includes the steps of parsing first coding information indicating whether a residual data of an image block in the enhanced layer is predicted from a corresponding block in the base layer, from the bitstream of the enhanced layer, and decoding the video signal based on the first coding information. And, the step of parsing includes the step of performing modeling the first coding information based on second coding information indicating whether prediction information of the corresponding block in the base layer is used to decode the image block in the enhanced layer. Accordingly, the present invention raises efficiency of video signal processing by enabling a decoder to derive information on a prediction mode of a current block in a decoder instead of transferring the information to the decoder. | 01-27-2011 |
20110026591 | SYSTEM AND METHOD OF COMPRESSING VIDEO CONTENT - A method of compressing video content is disclosed and may include receiving an image frame of a video signal having multiple components, generating an edge-map for the image frame, generating a bitstream base layer for each component of the video signal, generating a first bitstream enhancement layer for each component of the video signal, and generating successive bitstream enhancement layers for each component of the video signal. As the successive bitstream enhancement layers are generated, the method of compressing video content goes from lossy to lossless. | 02-03-2011 |
20110026592 | INTRA BLOCK WALK AROUND REFRESH FOR H.264 - An apparatus and method for digital video encoding is disclosed. The disclosed system provides for an improved way of correcting divergence of a reference block in a decoder while minimizing the overhead required to update the reference block. | 02-03-2011 |
20110026593 | IMAGE PROCESSING APPARATUS, IMAGE PROCESSING METHOD, PROGRAM AND INTEGRATED CIRCUIT - An image processing apparatus ( | 02-03-2011 |
20110026594 | CODING AND DECODING OF AN IMAGE OR OF A SEQUENCE OF IMAGES SLICED INTO PARTITIONS OF PIXELS OF LINEAR FORM - A method is provided of coding an image or a sequence of images generating a stream of data comprising data representative of at least one group of pixels in one of said images. Such a method comprises the steps of: selecting, for a group of pixels to be coded, an initial partition of predetermined linear form, slicing said group of pixels to be coded according to said selected initial partition, propagating said initial partition selected in said group of pixels to be coded, until the latter is sliced in its entirety into a plurality of partitions of predetermined form, selecting, for said sliced group of pixels, a predetermined order of traversal of said partitions, predicting and coding said partitions one after the other, according to said selected order of traversal. | 02-03-2011 |
20110032987 | Apparatus and method of encoding and decoding image data using color correlation - An image data encoding apparatus and method and an image data decoding apparatus and method are provided. The image data encoding apparatus may perform at least one image prediction with respect to image data, and select a prediction mode for encoding. The image data encoding apparatus may simultaneously perform both intra prediction and color prediction, and thereby may efficiently perform encoding. | 02-10-2011 |
20110032988 | TRANSCODER, METHOD OF TRANSCODING, AND DIGITAL RECORDER - A transcoder reducing processing amount when a coded stream to which at least intra prediction is applied is transcoded into a coded stream to which intra prediction and inter prediction are applied. The transcoder ( | 02-10-2011 |
20110032989 | MOVING PICTURE CODING DEVICE AND MOVING PICTURE CODING METHOD - Provided is a moving picture coding device which makes it possible to suppress deterioration in coding efficiency caused by flickers occurring at a time of high-speed capturing under fluorescent lamp lighting or the like. | 02-10-2011 |
20110038412 | METHOD AND APPARATUS FOR ENCODING VIDEO IN CONSIDERATION OF SCANNING ORDER OF CODING UNITS HAVING HIERARCHICAL STRUCTURE, AND METHOD AND APPARATUS FOR DECODING VIDEO IN CONSIDERATION OF SCANNING ORDER OF CODING UNITS HAVING HIERARCHICAL STRUCTURE - A method and apparatus for decoding a video and a method and apparatus for encoding a video are provided. The method for decoding the video includes: receiving and parsing a bitstream of an encoded video; extracting, from the bitstream, encoded image data of a current picture of the encoded video assigned to a maximum coding unit, and information about a coded depth and an encoding mode according to the maximum coding unit; and decoding the encoded image data for the maximum coding unit based on the information about the coded depth and the encoding mode for the maximum coding unit, in consideration of a raster scanning order for the maximum coding unit and a zigzag scanning order for coding units of the maximum coding unit according to depths. | 02-17-2011 |
20110038413 | METHOD AND APPARATUS FOR ENCODING VIDEO, AND METHOD AND APPARATUS FOR DECODING VIDEO - Disclosed is a method of encoding a video, the method including: splitting a current picture into at least one maximum coding unit; determining a coded depth to output a final encoding result according to at least one split region obtained by splitting a region of the maximum coding unit according to depths, by encoding the at least one split region, based on a depth that deepens in proportion to the number of times the region of the maximum coding unit is split; and outputting image data constituting the final encoding result according to the at least one split region, and encoding information about the coded depth and a prediction mode, according to the at least one maximum coding unit. | 02-17-2011 |
20110038414 | METHOD AND APPARATUS FOR ENCODING VIDEO, AND METHOD AND APPARATUS FOR DECODING VIDEO - Disclosed are method and apparatus for encoding and decoding an image which divides a current picture into blocks with various sizes and varies a number of intra prediction modes according to the sizes of the divided blocks. | 02-17-2011 |
20110038415 | METHOD AND APPARATUS FOR ENCODING VIDEO, AND METHOD AND APPARATUS FOR DECODING VIDEO - Disclosed are a method and a apparatus for encoding a video, and a method and apparatus for decoding a video, in which neighboring pixels used to perform intra prediction on a current block to be encoded are filtered and intra prediction is performed by using the filtered neighboring pixels. | 02-17-2011 |
20110044386 | METHOD AND APPARATUS FOR ENCODING GROUPS OF PICTURES OF A VIDEO SEQUENCE, EACH OF SAID GROUPS INCLUDING AN INTRA ENCODED PICTURE AND MORE THAN TWO PREDICTED ENCODED PICTURES - In known video coding standards there are basically three types of pictures: I, P and B. Video sequences are usually coded in a group of picture structure wherein several P or B pictures are coded following one I picture. However, this GOP structure has some disadvantages with respect to error resilience and storage medium recording. If a P picture is lost e.g. due to transmission channel error, then the subsequent P pictures can not be reconstructed correctly, and the error will propagate temporally and cause unpleasing artifacts. This GOP structure is designed for forward play only and makes complicated a reverse play operation. According to the invention, a reversible GOP structure is used for the video encoding and decoding. The RGOP structure contains both, a forward encoding chain and a backward encoding chain. Each picture in the RGOP structure is assigned to only one of these chains and the video pictures of adjacent RGOP chains are interleaved. | 02-24-2011 |
20110051811 | PARALLEL DIGITAL PICTURE ENCODING - Apparatus and Method for parallel digital picture encoding are disclosed. A digital picture is partitioned into two or more vertical sections. An encoder unit is selected to serve as a master and one or more encoder units are selected to serve as slaves. The total number of encoder units used equals the number of vertical sections. A mode search is performed on the two or more vertical sections on a row-by-row basis. Entropy coding is performed on the two or more vertical sections on a row-by-row basis. The entropy coding of each vertical section is performed in parallel such that each encoder unit performs entropy coding on its respective vertical section. De-blocking is performed on the two or more vertical sections in parallel on a row-by-row basis. | 03-03-2011 |
20110051812 | Video Transmitting Apparatus, Video Receiving Apparatus, Video Transmitting Method, and Video Receiving Method - A video transmitting apparatus includes: an error receiver that receives, from a video receiving apparatus for receiving a bit stream resulting from encoding of video data including pictures, error information indicating that an error is detected; an encoding-mode selector that selects a propagation-prevention encoding mode as an encoding mode when the error receiver receives the error information; and an encoder that encodes the video data in accordance with the selected encoding mode. In the propagation-prevention encoding mode, intra coding is executed on a forced intra block; a search range is set for a reference encoding unit so as not to include correspondent pixels from a boundary line serving as a boundary between the forced intra block and another block, the correspondent pixels corresponding to the number of adjacent pixels; and a restriction is set on deblocking-filter processing through a change in deblocking-filter setting information. | 03-03-2011 |
20110058606 | Latency Rate Distortion Optimisation - There is provided a method of improving latency in a Rate Distortion Optimisation apparatus, comprising re-ordering processing of a sequence of 4×4 blocks of pixels received for processing by the Rate Distortion Optimisation apparatus, the received order of the 4×4 blocks of pixels corresponding to the location of the 4×4 blocks of pixels within a macroblock, and processing the re-ordered sequence of 4×4 blocks in the Rate Distortion Optimisation apparatus, where the re-ordering of the processing of the 4×4 blocks of pixels comprises interleaving the processing of two upper 4×4 blocks of pixels of a current 8×8 block with the processing of two lower 4×4 blocks of pixels of a previous 8×8 block. There is also provided a method of improving latency in a Rate Distortion Optimisation apparatus, where the Rate Distortion Optimisation apparatus assesses nine intra prediction modes and the method further comprises re-ordering processing of intra prediction modes such that a first six modes processed are not dependent on a block of pixels above and to the right of a current block of pixels, and processing the re-ordered sequence of intra prediction modes in the Rate Distortion Optimisation apparatus. | 03-10-2011 |
20110058607 | Video coding - A method of transmitting video, a method of receiving and decoding video, and a corresponding transmitter, receiver and computer program products. The method of transmitting video to one or more recipient terminals comprises: transmitting a stream of inter frame encoded video data to a recipient terminal; during ongoing transmission of the stream to the recipient terminal, receiving a request signal from that recipient terminal; and in response to the request signal, transmitting alternatively encoded video data to the recipient terminal in association with the inter frame encoded video data. | 03-10-2011 |
20110058608 | Method and apparatus for image encoding using hold-MBs, and method and apparatus for image decoding using hold-MBs - In video/image coding, macroblocks (MBs) are often intra coded in raster scan order, starting from one seed MB. The invention improves intra prediction for optimized usage of multi-core processors. Encoding starts from multiple intra coded seed MBs per frame, and continues with adjacent MBs. A predefined prediction spread pattern (growth pattern) is used that comprises simultaneous prediction of two or more adjacent MBs per MB. Adjacent MBs with high coding cost are called “Hold-MB” and can be held from being processed, until another neighbouring edge is available for prediction. Encoding comprises marking a MB with high coding cost for deferred prediction. This MB is skipped while the other MBs are encoded. When a further adjacent MB was encoded, the marked MB is predicted based on the adjacent MBs. Since a decoder receives the deferment marks and uses the same growth pattern, it follows the encoder, and predicts and decodes correctly. | 03-10-2011 |
20110069756 | PREDICTIVE ENCODING/DECODING METHOD AND APPARATUS - A predictive encoding/decoding method and apparatus in which the decoder signals available reference frames for use by the encoder for subsequent encoding. | 03-24-2011 |
20110069757 | CONTENT ADAPTIVE VIDEO ENCODER AND CODING METHOD - A method of pre-processing a sequence of video picture data comprising I pictures, P pictures and B pictures, where the pictures are arranged as a plurality of Group Of Pictures (GOP) and each of the Group Of Pictures has a first picture and a plurality of Sub Group of Pictures (Sub-GOP). The method uses an analysis of the sequence of video picture data to determine a position of a scene change relative to a position of a start of a new GOP within the sequence of video picture data and then moves the start of the new GOP to coincide with the scene change by extending or decreasing a current GOP length according to whether the scene change and the start of a new GOP are within a predetermined number of pictures of each other. An apparatus for carrying out the method is also provided. | 03-24-2011 |
20110075732 | APPARATUS AND METHOD FOR ENCODING AND DECODING MOVING IMAGES - According to an embodiment, a moving image encoding method includes generating a predicted image of an original image based on a reference image, performing transform and quantization on a prediction error between the original image and the predicted image to obtain a quantized transform coefficient, performing inverse quantization and inverse transform on the quantized transform coefficient to obtain a decoded prediction error, adding the predicted image and the decoded prediction error to generate a local decoded image, setting filter data containing time-space filter coefficients for reconstructing the original image based on the local decoded image and the reference image, performing a time-space filtering process on the local decoded image in accordance with the filter data to generate a reconstructed image, storing the reconstructed image as the reference image, and encoding the filter data and the quantized transform coefficient. | 03-31-2011 |
20110075733 | Moving picture encoding apparatus and distribution system - A moving picture encoding apparatus divides a moving picture signal into key frames and non-key frames, encodes the key frames, predicts the non-key frames from the encoded key frames, determines a final encoding rate for each non-key frame, encodes each non-key frame, and outputs an error-correcting code at the final encoding rate as encoded data of the non-key frame. To determine the final encoding rate, the number of error-correcting bits needed to correct prediction errors is estimated by a first method and one or more second methods. The second methods are used to decide whether to use the number of bits estimated by the first method as the final encoding rate, or whether to supplement the estimated number of bits by adding an encoding rate correction. As a result, the encoding rate is not supplemented unnecessarily and the encoding efficiency is improved. | 03-31-2011 |
20110075734 | MOVING PICTURE ENCODING SYSTEM, MOVING PICTURE ENCODING METHOD, MOVING PICTURE ENCODING PROGRAM, MOVING PICTURE DECODING SYSTEM, MOVING PICTURE DECODING METHOD, MOVING PICTURE DECODING PROGRAM, MOVING PICTURE REENCODING SYTEM, MOVING PICTURE REENCODING METHOD, AND MOVING PICTURE REENCODING PROGRAM - A first super-resolution enlarger | 03-31-2011 |
20110080947 | Line-Based Compression for Digital Image Data - A method of compressing digital image data is provided that includes selecting an entropy code for encoding a line of pixels in the digital image data, wherein the entropy code is selected from a plurality of variable length entropy codes, using spatial prediction to compute a pixel predictor and a pixel residual for a pixel in the line of pixels, and selectively encoding the pixel residual using one of the entropy code or run mode encoding. | 04-07-2011 |
20110080948 | METHOD AND SYSTEM FOR 3D VIDEO DECODING USING A TIER SYSTEM FRAMEWORK - A video receiver receives a layered and predicted compressed 3D video comprising a base view video and an enhancement view video. A portion of pictures in the received compressed 3D video are selected to be decoded for display at an intended pace. Pictures in the received compressed 3D video are generated based on a tier system framework with tiers ordered hierarchically according to corresponding decodability. Each picture in the base view and enhancement view videos belongs to one of the plurality of tiers. A picture in a particular tier does not depend directly or indirectly on pictures in a higher tier. Each tier comprises one or more pictures with the same coding order. The video receiver decodes the pictures with the same coding order in parallel, and adaptively decodes the selected pictures according to corresponding coding layer information. The selected pictures are determined based on a particular display rate. | 04-07-2011 |
20110080949 | IMAGE PROCESSING APPARATUS, IMAGE PROCESSING METHOD, AND PROGRAM - An image processing apparatus includes: a storage means for storing a decoded image, which is obtained by encoding pictures constituting a frame sequential, in which pictures of a first image and a second image each having a disparity are alternately arranged, and performing local decoding, as a reference picture which is referenced when a predicted image is created for use in temporally later predictive encoding; and a storage control means for performing storage control to control the storage of the reference picture in the storage means such that, from among the pictures which are encoded temporally earlier than a current picture in encoding process which is a picture to be encoded, and are capable of becoming reference pictures, a picture which is a picture of an image at the same viewpoint as the current picture in encoding process from among the first image and the second image and is closest to the current picture in encoding process in a display order is stored in the storage means. | 04-07-2011 |
20110080950 | AUTOMATIC SELECTION OF ENCODING PARAMETERS TO CONTROL LENGTH OF TIME TO ENCODE AND SEND DATA OVER NETWORK - Data processing including encoding and sending is disclosed, which includes: encoding data using a selected one of a plurality of parameter sets each of which has at least one encoding parameter; calculating a length of an assigned time not exceeding a time limit for an original data set to be sent, per each data sub-set; calculating an estimate of an individual processing time T | 04-07-2011 |
20110080951 | Image Encoding Method, Image Decoding Method, Image Encoding Apparatus, Image Decoding Apparatus, and Program - A technique for improving a compression rate without needing new determination information (encoding flag information) is provided. For compression of each area to be encoded, based on a skip mode (a process which does not compress information of the area to be encoded, but copies previous information of the area to be encoded), it is determined whether an existing predicted image generated by an existing encoding standard is used, or an interpolation predicted image newly generated by executing move searching between decoded images is used. | 04-07-2011 |
20110085592 | VIDEO FRAME LOSS RECOVERY SCHEME - A video frame loss recovery scheme essentially belongs to a loss packet in a low overhead and low complicated recovery scheme and serves to protect P-frames of a group of pictures (GOP). Namely, if a P-frame of the same group of pictures loses during the transmission, a compensation frame could be applied to serve and recovered as a lost P-frame, thereby promoting to a preferable video presenting performance of a receiver. | 04-14-2011 |
20110090956 | COMPRESSION METHOD USING ADAPTIVE FIELD DATA SELECTION - A compression method using adaptive field data selection is able to compress video or other data while retaining quality. By determining if pixels in a field are able to be predicted, the method is able to retain the information that is not able to be predicted and predict the other information. The method enables significant compression of the data which allows larger data such as high definition videos to be compressed and effectively used. | 04-21-2011 |
20110090957 | VIDEO CODEC METHOD, VIDEO ENCODING DEVICE AND VIDEO DECODING DEVICE USING THE SAME - A video codec method synchronizes long term reference frames in a video encoding device and a video decoding device of a video communication system. The video encoding device encodes video frames to code streams in an inter-prediction mode and set the corresponding reference frames to non-committed long term reference frames. The video decoding device decodes the code streams using the corresponding reference frames, then transmits an acknowledgement of the non-committed long term reference frames to the video encoding device. The video encoding device sets the non-committed long term reference frames to committed long term reference frames, and encodes succeeding video frames in the inter-prediction mode using the committed long term reference frames. | 04-21-2011 |
20110090958 | NETWORK ABSTRACTION LAYER (NAL)-AWARE MULTIPLEXER WITH FEEDBACK - Advanced multiplexing methods and apparatus that are especially useful in multiplexing variable bit rate input video streams onto a fixed bandwidth output stream with minimum effect on video quality are described. A multiplexer provides feedback to a stagger transmitter to help it maintain its output bit rate. In addition, the stagger transmitter parses Network Abstraction Layers (NALs) from the given streams and makes decisions on which NALs to forward to the MUX. | 04-21-2011 |
20110090959 | BIT-DEPTH SCALABILITY - To increase efficiency of a bit-depth scalable data-stream an inter-layer prediction is obtained by mapping samples of the representation of the picture or video source data with a first picture sample bit-depth from a first dynamic range corresponding to the first picture sample bit-depth to a second dynamic range greater than the first dynamic range and corresponding to a second picture sample bit-depth being higher than the first picture sample bit-depth by use of one or more global mapping functions being constant within the picture or video source data or varying at a first granularity, and a local mapping function locally modifying the one or more global mapping functions and varying at a second granularity smaller than the first granularity, with forming the quality-scalable data-stream based on the local mapping function such that the local mapping function is derivable from the quality-scalable data-stream. | 04-21-2011 |
20110090960 | Rate Control Model Adaptation Based on Slice Dependencies for Video Coding - Statistics for estimating quantization factors of a coding-unit type (e.g., B-coded or I-coded) pictures are determined from other, possibly different (e.g., P-coded) pictures, or previously coded coding-units. Bit rate and quality relationships between such coding-unit types may be used with the quantization parameters. Estimating bit rate and quality relationships between coding-unit types enables accurate rate control for pictures regardless of their coding-unit type. Bit rate and quality relationships between coding-unit types can be used with multiple rate control models to increase compression. Rate control parameters may be adjusted with statistics generated by a motion estimation and compensation framework. Rate control performance may be controlled in transcoding compressed bit streams. | 04-21-2011 |
20110096833 | SOFTWARE VIDEO DECODER DISPLAY BUFFER UNDERFLOW PREDICTION AND RECOVERY - Prediction of and recovery from display buffer underflow are described. A first time delay for displaying a first group of one or more frames of a video picture stream located in an output frame buffer is calculated. A second time delay for displaying a second group of one or more frames in the picture stream is calculated. The second group directly follows the first group in the output buffer and is currently decoded by a decoder, but not yet deposited into the output frame buffer. A third time delay for decoding a third group of one or more frames in the picture stream is calculated. The third group directly follows the second group and is not yet decoded by the decoder. The decoder switches to or remains in a fast decoding mode if the sum of the first and second time delays is less than the third time delay. | 04-28-2011 |
20110096834 | METHOD AND APPARATUS FOR ENCODING RESIDUAL BLOCK, AND METHOD AND APPARATUS FOR DECODING RESIDUAL BLOCK - Methods and apparatuses for encoding and decoding a residual block are provided. The method of encoding the residual block includes: generating a prediction block of a current block; generating a residual block based on a difference between the prediction block and the current block; generating a transformation residual block by transforming the residual block to a frequency domain; splitting the transformation residual block into frequency band units; and encoding effective coefficient flags indicating frequency band units, of the frequency band units, in which nonzero effective transformation coefficients exist. | 04-28-2011 |
20110096835 | CODING METHOD, ERROR DETECTING METHOD, DECODING METHOD, CODING APPARATUS, ERROR DETECTING APPARATUS, AND DECODING APPARATUS - Provided is a coding method that allows reduction of a code amount necessary for coding reference indexes and improvement in the coding efficiency. The coding method according to the present invention is a method of coding a random accessible picture using inter-view reference, and includes: writing, into a slice header of the random accessible picture, a reference list modification syntax for modifying a reference picture list so that an inter-view reference picture is placed at the beginning of the reference picture list (S | 04-28-2011 |
20110103472 | METHODS, SYSTEMS AND DEVICES FOR COMPRESSION OF DATA AND TRANSMISSION THEREOF USING VIDEO TRANSMISSION STANDARDS - Systems, devices and methods are implemented for compressing high-definition video content. Consistent with one such implementation, a device is implemented for preparing a media stream containing high-definition video content for transmission over a transmission channel. A receiver unit is arranged to receive the media stream in a high-definition encoding format that does not compress the high-definition video content contained therein. A decoder unit is arranged to decode the media stream. A compression unit is arranged to compress the decoded media stream to produce a compressed media stream. An encapsulation unit is arranged to encapsulate the compressed media stream within an uncompressed video content format. An encoding unit is arranged to encode the encapsulated media stream using the high-definition format to produce a data stream and may be arranged to encrypt the data stream, e.g., using High-Bandwidth Digital Content Protection (HDCP). | 05-05-2011 |
20110103473 | Video Compression Under Multiple Distortion Constraints - Video compression is performed under multiple distortion constraints. Video coding includes determining a first set of Lagrangian cost values for multiple coding modes using a first distortion metric, determining a second set of Lagrangian cost values for the multiple coding modes using a second distortion metric, and selecting one of the coding modes base first set of Lagrangian cost values and the second set of Lagrangian cost values to encode a pixel block using the selected coding mode. The distortion metrics can include information associated with video display characteristics such as screen display size, video processing performance, a distortion characteristic, a temporal characteristic, or a spatial characteristic. The distortion metrics can also include characteristics of multiple video displays, such as parameters for usage, importance, design, and the technology type of the video displays. | 05-05-2011 |
20110103474 | APPARATUS FOR TRANSFORMING MEDIUM GRAINED SCALABILITY-BASED SCALABLE VIDEO CODING BITSTREAM INTO ADVANCED VIDEO CODING BITSTREAM - A Medium Grained Scalability (MGS)-to-Advanced Video Coding (AVC) transform apparatus may modify an accumulated residual signal of at least one MGS layer of a key picture, included in an MGS-based Scalable Video Coding (SVC) bitstream, and rewrite the MGS-based SVC bitstream into an AVC bitstream. | 05-05-2011 |
20110103475 | IMAGE ENCODING METHOD AND DEVICE, AND DECODING METHOD AND DEVICE THEREFOR - A video encoding method and apparatus and a video decoding method and apparatus. In the video encoding method, a first predicted coding unit of a current coding unit that is to be encoded is produced, a second predicted coding unit is produced by changing a value of each pixel of the first predicted coding unit by using each pixel of the first predicted coding unit and at least one neighboring pixel of each pixel, and the difference between the current coding unit and the second predicted coding unit is encoded, thereby improving video prediction efficiency. | 05-05-2011 |
20110110424 | Video Encoder and Data Processing Method - A video encoder for evaluating a prediction error by using a prediction technique include: an image encoding section which encodes a prediction image; and an encoding control device which selects any one of a plurality of prediction modes in prediction used by the image encoding section. The image encoding section performs clipping of higher-order bits of the prediction error input to the encoding control device and reduction of lower-order bits thereof for each of the prediction modes to control prediction mode selection, thus reducing the prediction error bit width to a predetermined bit width. The encoding control device sets to the image encoding section the number of higher-order bits to be clipped and the number of lower-order bits to be reduced. The predetermined bit width of the prediction error after bit width reduction is matched with the bus width used for prediction error transmission by the encoding control device and the image encoding section. | 05-12-2011 |
20110110425 | Video Encoder and Method for Performing Intra-Prediction and Video Data Compression - The invention provides a method for performing intra-prediction. A target pixel is selected from a plurality of pixels of a current block. A first intra-prediction mode of a left block and a second intra-prediction mode of an up block are then determined A first prediction value of the target pixel is calculated according to the first intra-prediction mode. A second prediction value of the target pixel is calculated according to the second intra-prediction mode. The first prediction value and the second prediction value are then weighted-averaged to obtain a weighted-average prediction value as an intra-prediction value of the target pixel. | 05-12-2011 |
20110116544 | METHODS OF INTRA PREDICTION, VIDEO ENCODER, AND VIDEO DECODER THEREOF - A method of intra prediction includes the steps of: receiving a video input having a plurality of blocks; encoding and reconstructing the plurality of blocks one by one; after encoding and reconstructing a designated block of the plurality of blocks to generate a designated reconstructed block, performing a deblocking operation upon the designated reconstructed block so as to generate a reference block with at least one sample being deblocked; and performing an intra prediction operation upon a current block by using samples of the reference block generated by the deblocking operation. | 05-19-2011 |
20110122944 | PARALLEL DECODING FOR SCALABLE VIDEO CODING - A method for decoding a stream encoded using a scalable video coding and including a plurality of layers of frames divided into a plurality of blocks, decodes block-wise in parallel the layers of the stream. A target block in an enhancement layer is decoded as soon as the block data required for its decoding are available from the reference layer. | 05-26-2011 |
20110122945 | METHODS FOR ERROR CONCEALMENT DUE TO ENHANCEMENT LAYER PACKET LOSS IN SCALABLE VIDEO CODING (SVC) DECODING - Methods for concealing Scalable Video Coding (SVC) decoding errors. Lost pictures in the target layer are replaced with up-sampled pictures from a lower layer, such as the base layer. In multiloop decoding applications, lost pictures in the target layer are replaced with corresponding up-sampled pictures from the lower layer. Subsequent target layer pictures in the same Group of Pictures (GOP) are either replaced with corresponding upsampled pictures from the lower layer, or they are decoded with up-sampled pictures from the lower layer used as reference pictures. For single-loop decoding, the bit stream of each layer is buffered, for each GOP, and inspected for errors. If an error is detected in the target layer, the pictures of the highest level layer without an error are decoded and up-sampled and used as the output pictures for the current GOP. | 05-26-2011 |
20110122946 | ELECTRONIC SYSTEM AND METHOD FOR SELECTIVELY ALLOWING ACCESS TO A SHARED MEMORY - An electronic system, an integrated circuit and a method for display are disclosed. The electronic system contains a first device, a memory and a video/audio compression/decompression device such as a decoder/encoder. The electronic system is configured to allow the first device and the video/audio compression/decompression device to share the memory. The electronic system may be included in a computer in which case the memory is a main memory. Memory access is accomplished by one or more memory interfaces, direct coupling of the memory to a bus, or direct coupling of the first device and decoder/encoder to a bus. An arbiter selectively provides access for the first device and/or the decoder/encoder to the memory based on priority. The arbiter may be monolithically integrated into a memory interface. The decoder may be a video decoder configured to comply with the MPEG-2 standard. The memory may store predicted images obtained from a preceding image. | 05-26-2011 |
20110122947 | IMAGE DECODING APPARATUS AND METHOD FOR HANDLING INTRA-IMAGE PREDICTIVE DECODING WITH VARIOIUS COLOR SPACES AND COLOR SIGNAL RESOLUTIONS - The present invention is directed to an image information decoding apparatus adapted for performing intra-image decoding based on resolution of color components and color space of an input image signal. An intra prediction unit serves to adaptively change block size in generating a prediction image based on a chroma format signal indicating whether resolution of color components is one of 4:2:0 format, 4:2:2 format, and 4:4:4 format, and a color space signal indicating whether color space is one of YCbCr, RGB, and XYZ. An inverse orthogonal transform unit and an inverse quantization unit serve to also change orthogonal transform technique and quantization technique in accordance with the chroma format signal and the color space signal. A decoding unit decodes the chroma format signal and the color space signal to generate a prediction image corresponding to the chroma format signal and the color space signal. | 05-26-2011 |
20110134998 | METHOD AND APPARATUS FOR ENCODING VIDEO BY MOTION PREDICTION USING ARBITRARY PARTITION, AND METHOD AND APPARATUS FOR DECODING VIDEO BY MOTION PREDICTION USING ARBITRARY PARTITION - Disclosed is a method and apparatus of encoding a video, the method including: splitting video data into a maximum coding unit; encoding the video data of the maximum coding unit based on deeper coding units of hierarchical structures in which a coding unit of an upper depth is split as a depth deepens, according to at least one split region of the maximum coding unit, and determining a coding depth at which an encoding result is to be output, including inter prediction using partitions obtained by splitting the coding unit according to arbitrary ratios; and outputting a bitstream including the encoded video data corresponding to a coding depth for the at least one split region according to maximum coding units and information regarding the coding depth and encoding modes. | 06-09-2011 |
20110134999 | METHOD AND APPARATUS FOR ENCODING VIDEO, AND METHOD AND APPARATUS FOR DECODING VIDEO - A method and apparatus for encoding a video, and a method and apparatus for decoding a video, for increasing image compression efficiency by spatially transforming, scaling and frequency-transforming residual image data. The method of encoding an image includes spatially transforming a residual block through performing wavelet transformation or downsampling on the residual block to have a size that is equal to or smaller than a maximum size of a transformation unit when the size of the residual block is larger than the maximum size of the transformation unit, and transforming the spatially transformed residual block to a frequency domain. | 06-09-2011 |
20110142126 | LOW BIT RATE CODEC - The present invention relates to improvements of predictive encoding/decoding operations performed on a signal which is transmitted over a packet switched network. The signal is encoded on a block by block basis in such way that a block A-B is predictive encoded independently of any preceding blocks. A start state | 06-16-2011 |
20110142127 | Image Processing Device - Disclosed is an image processing technique which more suitably reduces flicker noise. An image display device is comprised of an input unit which inputs encoded image data containing images encoded by intraframe prediction and interframe prediction, an image decoder which decodes the encoded image data, a filter unit which filters the decoded images output from the image decoder, and a display unit which displays the image after filtering. The filter unit performs at least a process to correct the pixel values in a decoded image decoded by interframe prediction immediately preceding in time a decoded image decoded by intraframe prediction of the decoded images output from the image decoder. | 06-16-2011 |
20110150084 | SCALABLE VIDEO ENCODING AND DECODING METHOD USING SWITCHING PICTURES AND APPARATUS THEREOF - A conventional new video coding technology can provide a bitstream switching picture by encoding the bitstream switching picture into an I picture. However, an encoding efficiency is greatly reduced. As such, the new video coding technology does not provide an efficient bitstream switching function. Also, other advantages provided by a switching picture technology such as a random access, error durability, and a bitstream splicing are not provided. Provided is an apparatus for encoding a video bitstream including a base layer bitstream and an enhancement layer bitstream by encoding an enhancement layer picture of the enhancement layer bitstream, which is reproduced immediately after a base layer picture of the base layer bitstream is reproduced, into a non-switching pictures by interlayer prediction using a reference image generated by decoding a pre-encoded base layer picture or by motion prediction using another reference image generated by decoding a pre-encoded enhancement layer picture, and into a switching picture, which is decoded into the same image as the non-switching picture, by an interlayer prediction using the non-switching picture and a reference image generated by decoding a pre-encoded base layer picture, while the base layer picture is being reproduced. | 06-23-2011 |
20110150085 | TEMPORAL AND SPATIAL VIDEO BLOCK REORDERING IN A DECODER TO IMPROVE CACHE HITS - This disclosure describes techniques in which the decoding order of video blocks is modified relative to the display order of video blocks. The decoding order may be modified temporally such that video blocks of different video frames (or other coded units) are decoded in an alternating manner. In this case, the decoding order of video blocks may alternate between video blocks of two or more different frames. Furthermore, the decoding order may also be modified spatially within a given video block such that the video blocks are decoded in an order that does not correspond to the raster scan order of the video blocks. The techniques may improve the use of memory by improving the likelihood of cache hits, thereby reducing the number of memory loads from an external memory to an internal cache associated with the decoder. | 06-23-2011 |
20110150086 | METHOD FOR DISPLAYING DECODED VIDEO BIT STREAMS - A method for improving display speed of decoding video bit streams obtains the video bit streams from a storage system of a computer by a decoder, and decodes the video bit streams in a display block of a memory of the computer to obtain decoded images by the decoder. The method further selects an image from the decoded images by the decoder, and updates a reference image stored in a buffer block of the memory with the selected image. | 06-23-2011 |
20110150087 | METHOD AND DEVICE FOR IMAGE ENCODING/DECODING USING ARBITRARY PIXELS IN A SUB-BLOCK - A video encoding/decoding method and apparatus using arbitrary pixels in each sub-block are disclosed. The present disclosure comprises an extractor, a first predictor, a first subtractor, a first transformer, a first quantizer, a first inverse quantizer, a first inverse transformer, a first adder, a second predictor, a second subtractor, a combiner for combining arbitrary residual pixels, a second transformer, a second quantizer, and an encoder whereby arbitrary pixels may be extracted from the respective sub-blocks of a current block and then encoded and decoded into reconstructed arbitrary pixels, which are used to predict and encode the remaining pixels of the respective sub-blocks. According to the disclosed encoding and decoding of a video, an intra prediction of pixels in a block to currently encode or decode is improved in accuracy to increase the video coding efficiency. | 06-23-2011 |
20110158316 | PICTURE CODING APPARATUS, PICTURE DECODING APPARATUS AND THE METHODS - A weighting factor mode determination unit determines whether to code an interlaced picture in a field mode or a frame mode, based on a value of a flag “AFF” indicating whether or not to switch between the field mode and the frame mode on a block-by-block basis and notifies switches and a multiplexing unit of the determined mode. The switches select either the field mode or the frame mode according to the notified mode. A field weighting factor coding unit or a frame weighting factor coding unit performs respectively the coding of respective weighting factors when the respective modes are selected. | 06-30-2011 |
20110158317 | METHOD OF REDUCING COMPUTATIONS IN INTRA-PREDICTION AND MODE DECISION PROCESSES IN A DIGITAL VIDEO ENCODER - A method of improving the computation speed of the sum of absolute transformed distances (SATD) for different intra-prediction modes is described. Determining the SATD quicker provides the benefits of better coding performance without suffering the drawbacks of longer computation times. The method of reducing intra-prediction and mode decision processes in a video encoder, implements Hadamard transforms with improvements. Hadamard transforms are performed on an original block and predicted blocks and calculations are only performed where coefficients are non-zero thus skipping the coefficients that are zero. Using such an approach, the calculations required for the Vertical Prediction, Horizontal Prediction and DC Prediction are reduced significantly. Thus, the best intra-prediction mode is able to be determined very efficiently. | 06-30-2011 |
20110158318 | ENCODING DEVICE, ENCODING METHOD, DECODING DEVICE, AND DECODING METHOD - Continuous reproduction can be made possible. An encoding apparatus for executing an encoding process with an encoding system capable of at least B-pictures as pictures to be prediction-encoded comprises a timing calculation means for, anticipating that a plurality of encoded information created by performing the encoding process will be sequentially decoded on a decoding side, calculating output timing for results of decoding the encoded information, and a timing notification means for notifying the decoding side of the output timing calculated by the timing calculation means before a result of decoding corresponding encoded information is obtained. | 06-30-2011 |
20110164680 | METHOD OF EFFECTIVELY PREDICTING MULTI-LAYER BASED VIDEO FRAME, AND VIDEO CODING METHOD AND APPARATUS USING THE SAME - A method and apparatus are provided for effectively predicting a video frame that use all of the advantages of an intra mode and an intra BL mode in multi-layer structure based-video coding. The method includes reconstructing the intra block of a lower layer using the previously reconstructed first neighboring blocks of the intra block; subtracting the first neighboring blocks from previously stored the second neighboring blocks of an upper layer corresponding to the first neighboring blocks; creating a differential predicted block based on a predetermined intra prediction mode by performing intra prediction using virtual differential neighboring blocks that are created as a result of the subtraction; adding the differential predicted block and the reconstructed intra block; and subtracting a predicted block, which is created as a result of the addition, from a block of the upper layer corresponding to the intra block. | 07-07-2011 |
20110170593 | METHOD AND APPARATUS FOR ENCODING VIDEO AND METHOD AND APPARATUS FOR DECODING VIDEO BY CONSIDERING SKIP AND SPLIT ORDER - A method of encoding a video includes: splitting a picture into a maximum coding unit; for the maximum coding unit, determining coding units having a tree structure including coding units of coded depths and determining encoding modes for the coding units of the coded depths by performing encoding based on coding units according to depths, the coding units according to depths obtained by hierarchically splitting the maximum coding unit as a depth deepens; and outputting information about a maximum coding unit size and, for the maximum coding unit, information indicating an order of split information and skip mode information which is selectively determined for the coding units according to depths, information about the encoding modes for the coding units of the coded depths including the split information and the skip mode information which are arranged according to the order, and encoded video data. | 07-14-2011 |
20110176608 | METHOD AND APPARATUS FOR DETERMINING INTRA PREDICTION MODE, AND METHOD AND APPARATUS FOR ENCODING/DECODING VIDEO USING SAME - Disclosed are a method and apparatus for determining an intra prediction mode, and for encoding/decoding video using the same. An apparatus for determining an intra prediction mode is provided, the apparatus comprising a calculator to calculate a variation of adjacent pixels to a current block; a threshold setter to set a threshold to evaluate the pixel variation; a comparator to compare between the variation and the threshold; a first prediction mode determination unit to determine a single predetermined prediction mode to be an optimal prediction mode if the variation is below the threshold; and a second prediction mode determination unit to determine a particular prediction mode from a plurality of prediction modes to be the optimal prediction mode through a rate-distortion optimization by performing intra predictions in the plurality of prediction modes if the variation is greater than or equal to the threshold. | 07-21-2011 |
20110182357 | INTRA PREDICTION METHOD AND APPARATUS, AND IMAGE ENCODING/DECODING METHOD AND APPARATUS USING SAME - The present disclosure relates to an intra prediction method and apparatus and an image encoding/decoding method and apparatus using the same. The disclosure provides the intra prediction apparatus that predicts the pixel values of respective pixels in a current block by weight-averaging the pixel values of one or more adjacent pixels in neighboring blocks to the current block according to the distances between each pixel in the current block and the adjacent pixel(s). According to the disclosure, the current block to be encoded can be predicted more accurately so that the encoding efficiency is improved by reducing the difference between the original block and the predicted block, and thereby video compression efficiency can be improved. | 07-28-2011 |
20110182358 | WAVELET TRANSFORM APPARATUS AND METHOD BASED ON PREDICTION-UPDATE LIFTING SCHEME, AND ADAPTIVE PREDICTION APPARATUS AND METHOD AND RECORDING MEDIUM FOR THE SAME - The present disclosure relates to a wavelet transform apparatus and method based on a prediction-update lifting scheme, and an adaptive prediction apparatus and method and a recording medium for the same. The disclosure comprises the steps of: setting first updated even polyphase samples influenced when being updated from corresponding odd polyphase samples, setting plural candidate groups for prediction direction based on the set first updated even polyphase samples, selecting a first prediction direction from the candidate groups to minimize the energy in a high band, obtaining a first prediction value based on the first prediction direction and the updated even polyphase samples corresponding to the first prediction direction, and obtaining residual odd polyphase samples by deducting the first prediction value from the corresponding odd polyphase samples. Therefore, the present disclosure is able to increase encoding efficiency by minimizing energy transfer to a high band signal when removing the spatial correlation within an image using a directional wavelet transform designed based on the prediction-update lifting scheme. | 07-28-2011 |
20110188569 | SYSTEM AND METHOD FOR RELATIVE STORAGE OF VIDEO DATA - System and method for compressing and decompressing of differentially encoded video streams. I-frames of the encoded video stream may be relatively compressed and decompressed, thereby reducing video data size of an already encoded video stream. Compression and decompression may be lossless processes and may typically require relatively low processing power and small memory sizes. | 08-04-2011 |
20110188570 | MOVING IMAGE PROCESSING METHOD, PROGRAM AND APPARATUS - It is an object of the present invention to provide a method, a program, and an apparatus for processing a moving image, allowing efficient and smooth decoding in a simple configuration without heavily depending on the functions of an OS. Herein disclosed is a method for processing a moving image using a plurality of processing units, comprising: a step of dividing a frame of the moving image into a plurality of slices, where a number of the plurality of slices is not a multiple of a number of the plurality of processing units; a processing step, assigned to each of the plurality of slices, for processing each of the plurality of slices; and a switching step for executing slice switching, which switches between the slices to be processed, in the processing step. The method according to the present invention, not limited to the processing of moving images, allows efficient and smooth decoding in a simple configuration, even if the number of slices is not an integer multiple of the number of the processing units, without heavily depending on the functions of an OS. | 08-04-2011 |
20110188571 | RECURSIVE ADAPTIVE INTERPOLATION FILTERS (RAIF) - Adaptive interpolation filters which are recursively updated based on previously reconstructed images, and which can differ within a single frame as they adapt to spatial changes. An initial set of filters is known within a coding system, including both encoder and decoder. Fractional-pel motion estimation of macroblock is generalized by communicating integer-pel motion vectors and an index to a selected prediction interpolation filter. Prediction filters are updated based on local correlation data comprising auto-correlation data, and/or cross-correlation data. | 08-04-2011 |
20110188572 | METHOD AND APPARATUS FOR ENCODING VIDEO BASED ON SCANNING ORDER OF HIERARCHICAL DATA UNITS, AND METHOD AND APPARATUS FOR DECODING VIDEO BASED ON SCANNING ORDER OF HIERARCHICAL DATA UNITS - A video decoding method and apparatus and a video encoding method and apparatus based on a scanning order of hierarchical data units are provided. The decoding method includes: receiving and parsing a bitstream of an encoded video; extracting from the bitstream information about a size of a maximum coding unit for decoding a picture of the encoded video, and encoding information about a coded depth and an encoding mode for coding units of the picture, wherein the size of the maximum coding unit is a maximum size of a coding unit which is a data unit for decoding the picture; and determining a hierarchical structure of the maximum coding unit and the coding units into which the picture is divided according to depths, and decoding the picture based on the coding units, by using the information about the size of the maximum coding unit and the encoding information about the coded depth and the encoded mode. | 08-04-2011 |
20110188573 | Method and Device for Processing a Video Sequence - The invention concerns a method and a device ( | 08-04-2011 |
20110188574 | DEBLOCKING METHOD, DEBLOCKING APPARATUS, DEBLOCKING PROGRAM AND COMPUTER-READABLE RECORDING MEDIUM RECORDED WITH THE PROGRAM - A direction is detected for each block in which a pixel value is changed which is represented by an edge that indicates a direction of change in pixel value in each block, a direction in which a deblocking filter is to be applied to a block boundary is determined based on a direction of an edge detected for a block to be processed which includes the block boundary subject to deblocking and on a direction of an edge detected for a block contacting the block to be processed, and the deblocking filter is applied to the block boundary in accordance with the determined direction. | 08-04-2011 |
20110194601 | VIDEO DECODING DEVICE - A video decoding device is provided. The device includes an error checking unit and a decoding unit. The error checking unit checks the error state of a video data, so as to produce an error information. Then, the decoding unit selectively performs an error concealment process and a decoding process for the video data according to the error information. The video decoding device of the present invention can perform error checking process, error concealment process, and video decoding process for the video data. | 08-11-2011 |
20110194602 | METHOD AND APPARATUS FOR SUB-PIXEL INTERPOLATION - There is provided a method and apparatus for decoding an encoded video stream. The method comprises receiving an indication of a motion vector for a current picture, the motion vector referring to a previously decoded picture. The method also comprises applying a mask, the mask defining a subset of sub-pixel positions of the previously decoded picture which may be referenced by the motion vector for the current picture. The method further comprises identifying at least one pixel value for the current picture by referring to the value of at least one pixel in an allowed pixel position of the previously decoded picture. | 08-11-2011 |
20110194603 | APPARATUS, A METHOD AND A COMPUTER PROGRAM FOR VIDEO CODING - There is disclosed an apparatus, a method and a computer program for video coding. The apparatus comprises a selector configured for selecting a pixel for prediction; a projection definer configured for determining a projection of said pixel to a set of reference pixels; and a prediction definer configured for selecting one or more reference pixels from said set of reference pixels on the basis of said projection, and using said selected one or more reference pixels to obtain a prediction value for said pixel to be predicted. | 08-11-2011 |
20110194604 | CODE CONVERSION/TRANSMISSION METHOD AND APPARATUS FOR MOVING PICTURE DATA, AND CODE CONVERSION/RECEPTION METHOD AND APPARATUS FOR MOVING PICTURE DATA - A code conversion/transmission apparatus for being supplied with compressed encoded data and converting and outputting the data to a transmission path has code converter/transmitters for outputting the encoded data input thereto and encoded data produced by re-encoding the encoded data input thereto, or outputting a plurality of encoded data comprising encoded data produced by separately re-encoding the encoded data input thereto, respectively, and transmitting the plurality of encoded data to at least one transmission path. At least a portion of the encoded data input thereto and at least a portion of the re-encoded encoded data are transmitted to the transmission path. | 08-11-2011 |
20110200104 | PARALLEL ENTROPY CODING AND DECODING METHODS AND DEVICES - A method for entropy coding data using parallel entropy coders to encode an input sequence as a plurality of encoded subsequences, which are then combined to form an output bitstream. The input sequence is separated into subsequences on the basis of a context model. A method for entropy decoding a bitstream of encoded data by extracting a plurality of encoded subsequences from the bitstream and entropy decoding the encoded subsequences in parallel to generate a plurality of decoded subsequences, which are then interleaved based on a context model to produce a reconstructed sequence. | 08-18-2011 |
20110206117 | Data Compression for Video - A method of selecting reference blocks for intra or inter prediction coding of a current block of a video signal. Each reference blocks is selected by: (i) determining a group of candidate blocks comprising at least some candidate blocks other than immediately adjacent spatial neighbours of the current block; and (ii) selecting one of the candidate blocks as the reference block based on a second metric, different from the first metric, the second metric relating to a number of bits that would be required in the encoded bitstream to encode both the residual block and the side information identifying the respective reference block. | 08-25-2011 |
20110206118 | Data Compression for Video - The present invention provides an encoded bitstream and corresponding decoder. An encoded bit stream of compressed video data represents a plurality of successive video frames with each frame being divided into a plurality of portions and each portion corresponding to a plurality of pixels. The encoded bit stream comprises: a set of quantized transform domain coefficients representing a first one of said portions; difference data for a second one of said portions, wherein the difference data defines a difference between transform domain coefficients of the first portion and the predicted second portion, such that the second portion can be predicted from the first portion; and an address specifying the location of the first portion in terms of a whole number of said portions instead of a pixel offset. | 08-25-2011 |
20110206119 | Data Compression for Video - A method of compressing a video signal. The method comprises: for each of a plurality of image portions, transforming from a spatial domain representation into a transform domain representation; and for each of a plurality of target image portions to be encoded, determining a respective reference portion, determining a prediction of the target image portion based on the reference portion, and encoding the target image portion based on the prediction. The prediction comprises predicting a non-lateral motion of the target image portion relative to the reference portion based on processing of their transform domain coefficients. The encoding comprises generating an encoded bitstream comprising information about the non-lateral motion for use by a decoder. | 08-25-2011 |
20110206120 | SYSTEM AND METHOD FOR ENCODING AND DECODING USING TEXTURE REPLACEMENT - The invention provides devices and methods that process images. The invention processes a received signal representing information of texture and information of an image, which has the texture removed from at least one region. The image information is encoded to obtain encoded information of the image. An output signal is generated representing the texture information and the encoded image information. In another embodiment, the invention synthesizes texture based on the received texture information, decodes received image information, which is encoded, to obtain a decoded image, and then maps the synthesized texture onto the decoded image. | 08-25-2011 |
20110206121 | IMAGE ENCODING APPARATUS, IMAGE ENCODING METHOD, AND IMAGE ENCODING PROGRAM - It is an object of the present invention to provide an image encoding apparatus, an image encoding method, and an image encoding program, which can homogenize image quality of an image as a whole without lowering encoding efficiency, being operable at high speed, and reduce the size of circuit scale by performing macroblock shuffling without changing slice structure. Provided is an image encoding apparatus, including: a shuffling portion which collects and shuffles a plurality of macroblocks constituting image data from respective positions within an image; an encoding portion which performs space-frequency transform and entropy encoding on the plurality of macroblocks collected and shuffled by the shuffling portion, as a base unit; and a rate control portion which controls the encoding portion to adjust the rate of the plurality of macroblocks after the encoding. | 08-25-2011 |
20110211636 | IMAGE ENCODER AND IMAGE DECODER - An image encoder includes a preprocessing unit | 09-01-2011 |
20110216827 | Method and apparatus for efficient encoding of multi-view coded video data - A method and apparatus for efficient encoding of multi-view coded video data is provided. The apparatus includes one or more encoders ( | 09-08-2011 |
20110216828 | I-FRAME DE-FLICKERING FOR GOP-PARALLEL MULTI-THREAD VICEO ENCODING - A method of encoding video is presented in which multiple groups of pictures (GOPs) are formed and encoded in parallel threads. Each encoded GOP has an initial I-frame followed by a series of P-frames. Each I-frame is deflicker coded with a first derived no flicker reference from the nearest coded frame of a preceding GOP and, the last P-frame in the series of the preceding GOP is deflicker coded with a second derived no flicker reference from the deflicker coded I-frame. | 09-08-2011 |
20110216829 | ENABLING DELTA COMPRESSION AND MODIFICATION OF MOTION ESTIMATION AND METADATA FOR RENDERING IMAGES TO A REMOTE DISPLAY - Delta compression may be achieved by processing video data for wireless transmission in a manner which reduces or avoids motion estimation by a compression process. Video data and corresponding metadata may be captured at a composition engine. Frame buffer updates may be created from the data and metadata. The frame buffer updates may include data relating to video macroblocks including pixel data and header information. The frame buffer updates may include pixel reference data, motion vectors, macroblock type, and other data to recreate a video image. The macroblock data and header information may be translated into a format recognizable to a compression algorithm (such as MPEG-2) then encoded and wirelessly transmitted. | 09-08-2011 |
20110222601 | MOVING IMAGE ENCODING AND DECODING SYSTEM - A moving image encoding and decoding system reduces compressed moving picture data amounts by producing a prediction signal suitable for moving pictures including dynamic textures. The system includes a moving picture encoding device | 09-15-2011 |
20110222602 | METHOD AND DEVICE FOR PROCESSING A VIDEO SIGNAL USING INTER-VIEW PREDICTION - A method and apparatus for processing a video signal using inter-viewpoint prediction are disclosed. The video signal processing method includes acquiring a type of a current block, acquiring a depth inter-view prediction flag according to the current block type, acquiring color information of a reference block corresponding to the current block when the current block is encoded using depth inter-view prediction according to the depth inter-view prediction flag, and predicting color information of the current block using the color information of the reference block. The video signal processing method performs inter-viewpoint prediction using depth information, such that a motion vector of a macroblock can be induced from a decoder using such depth information. Therefore, a motion vector of the macroblock is not separately coded. In addition, the video signal processing method uses a flag that indicates whether to perform inter-viewpoint prediction using depth information. | 09-15-2011 |
20110228847 | Methods and Systems to Encode and Decode Sequences of Images - Methods and systems to compress and decompress sequences of images, such as video frames, including compression techniques to estimate pixel values, to determine differences between the estimated pixel values and actual pixel values, to arithmetically encode a corresponding sequence of difference values or symbols as a code value, and to output the code value and associated reference information in a data stream. Decompression techniques include techniques to read the code value and associated reference information from the data stream, to arithmetically decode the symbols from the code value, and to reconstruct the sequence of video frames from the decoded symbols and the associated reference information. Also disclosed are techniques to reduce or preclude overflow of registers or buffers used to hold code range values, and to order tables of code range values to improve efficiency of table look-up operations. | 09-22-2011 |
20110228848 | INTRA VIDEO IMAGE COMPRESSION AND DECOMPRESSION - A method for compressing an image having rows and columns, comprising providing an image, sub-sampling the image into a plurality of sub-image by selecting subsets of non-overlapping pixels in neighboring rows and columns in the image and encoding the sub-images in a video sequence. | 09-22-2011 |
20110228849 | IMAGE PROCESSING APPARATUS AND IMAGE PROCESSING METHOD - An image processing apparatus includes a predictive picture generator configured to generate a predictive picture for an encoding target block based on pixel values of pixels included in already-encoded blocks around the encoding target block, a predictive error generator configured to generate predictive error based on a picture expressed by the encoding target block and a weighting unit configured to apply weights to pixel values by conducting a multiplication that multiplies by a constant greater than 1 the pixel values of pixels used to generate a predictive picture for another encoding target block, the pixels being pixels from among a plurality of pixels included in predictive error generated by the predictive error generator. | 09-22-2011 |
20110228850 | METHOD OF PROCESSING A VIDEO SEQUENCE AND ASSOCIATED DEVICE - The invention concerns a method of processing a video sequence and an associated device. | 09-22-2011 |
20110235708 | Method and System for Detecting Global Brightness Change for Weighted Prediction in Video Encoding - A method of encoding a coding unit of a digital video sequence is provided that includes computing a brightness measure for each region in a plurality of regions in the coding unit, wherein the brightness measure indicates a relative brightness between the region in the coding unit and a corresponding region in a reference coding unit, determining a number of regions in the plurality of regions with significant brightness change by comparing each brightness measure to a region brightness change threshold, detecting whether there is global brightness change in the coding unit by comparing the number of regions to a global brightness threshold, and when global brightness change is detected, computing weighted prediction factors to be used for weighted prediction in encoding the coding unit. | 09-29-2011 |
20110235709 | FRAME DROPPING ALGORITHM FOR FAST ADAPTATION OF BUFFERED COMPRESSED VIDEO TO NETWORK CONDITION CHANGES - A video coding and transmission system may employ techniques for adapting buffered video to network condition changes. Video data may be coded as reference data and non-reference data. According to the embodiments, non-reference frame may be detected in buffered video while awaiting transmission to a network. When network degradation is detected, one or more of the buffered non-reference frames may be dropped when network degradation is detected. Information about the dropped frames may be passed to an encoder for updating buffer parameters for future encoding. In this manner, a video coding system may provide faster responses to changing network conditions than systems without such buffer management techniques. | 09-29-2011 |
20110243224 | Methods and Apparatus Using Virtual Reference Pictures - There are provided methods and apparatus using virtual reference pictures. An apparatus includes an encoder for encoding at least one picture, using at least one virtual reference picture, to form a resultant bitstream. The at least one virtual reference picture is different than a previously decoded picture. | 10-06-2011 |
20110243225 | DETERMINING INTRA PREDICTION MODE OF IMAGE CODING UNIT AND IMAGE DECODING UNIT - A method and apparatus for determining an intra prediction mode of a coding unit. Candidate intra prediction modes of a chrominance component coding unit, which includes an intra prediction mode of a luminance component coding unit, are determined, and costs of the chrominance component coding unit according to the determined candidate intra prediction modes are compared to determine a minimum cost intra prediction mode to be the intra prediction mode of the chrominance component coding unit. | 10-06-2011 |
20110243226 | LOW COMPLEXITY ENTROPY-ENCODING/DECODING METHOD AND APPARATUS - Entropy encoding and entropy decoding of image data are respectively performed whereby context modeling is performed on a context unit of blocks of the image data based on a context model of a previously encoded or decoded block. | 10-06-2011 |
20110243227 | MOVING PICTURE DECODING METHOD AND DEVICE, AND MOVING PICTURE ENCODING METHOD AND DEVICE - The objective is to reduce the amount of code in the encoding/decoding process for a moving picture. In an intra prediction process, the degree of ease of estimating the prediction direction or the block mode for a block to be decoded is determined based on the prediction direction data or the block mode for multiple adjacent blocks which have been decoded previously and which are adjacent to the block to be decoded; the prediction direction data or the block mode for the block to be decoded is decoded based on the result of said determination; and intra prediction is performed based on the decoded prediction direction data or the block mode to generate decoded image data. | 10-06-2011 |
20110249731 | Methods and Systems for Intra Prediction - Aspects of the present invention relate to systems and methods for intra prediction. According to one aspect of the present invention, a macroblock may be partitioned into two, or more, sets of blocks. The pixel values for a block within a first set of blocks may be predicted using reconstructed values from only neighboring macroblocks. The pixel values for a block within another set of blocks may be subsequently predicted using reconstructed values from blocks in previously reconstructed sets of blocks and/or reconstructed values from neighboring macroblocks. The pixel values for blocks within a set of blocks may be predicted in parallel. | 10-13-2011 |
20110249732 | Methods and Systems for Intra Prediction - Aspects of the present invention relate to systems and methods for intra prediction. According to one aspect of the present invention, a macroblock may be partitioned into two, or more, sets of blocks. The pixel values for a block within a first set of blocks may be predicted using reconstructed values from only neighboring macroblocks. The pixel values for a block within another set of blocks may be subsequently predicted using reconstructed values from blocks in previously reconstructed sets of blocks and/or reconstructed values from neighboring macroblocks. The block residuals for the first set of blocks may be signaled, and the block residuals for subsequently predicted blocks may be signaled. The pixel values for blocks within a set of blocks may be predicted in parallel. | 10-13-2011 |
20110249733 | Methods and Systems for Intra Prediction - Aspects of the present invention relate to systems and methods for intra prediction. According to one aspect of the present invention, a macroblock may be partitioned into two, or more, sets of blocks. According to a second aspect of the present invention, when a block is in a first set of blocks, a predicted intra-prediction mode for the block may be predicted based on the intra-prediction modes of available blocks within the first set and of blocks in available neighboring macroblocks. According to a third aspect of the present invention, when a block is in the first set of blocks, a predicted intra-prediction mode for the block may be predicted based on the intra-prediction modes of blocks in available neighboring macroblocks. | 10-13-2011 |
20110249734 | Methods and Systems for Intra Prediction - Aspects of the present invention relate to systems and methods for intra prediction. According to one aspect of the present invention, a macroblock may be partitioned into two, or more, sets of blocks. According to another aspect of the present invention, the pixel values for a block within a first set of blocks may be predicted using reconstructed values from only neighboring macroblocks, wherein the reconstructed values may be weighted according to their distance from the block. | 10-13-2011 |
20110249735 | Methods and Systems for Intra Prediction - Aspects of the present invention relate to systems and methods for intra prediction. According to one aspect of the present invention, a macroblock may be partitioned into two, or more, sets of blocks. The pixel values for a block within a first set of blocks may be predicted using reconstructed values from only neighboring macroblocks. The pixel values for a block within another set of blocks may be subsequently predicted using reconstructed values from blocks in previously reconstructed sets of blocks and/or reconstructed values from neighboring macroblocks. A reconstructed block used in the prediction may be above, below, to left of or to the right of the block being predicted. The pixel values for blocks within a set of blocks may be predicted in parallel. | 10-13-2011 |
20110249736 | Codeword restriction for high performance video coding - A system for encoding and/or decoding video that includes the use of restricted codewords. The use of restricted codewords permits a reduction in the bit-rate of the video bit stream without substantially impacting the resulting image quality. | 10-13-2011 |
20110249737 | MIXED TAP FILTERS - During the prediction stage of a video encoding and/or decoding process, a video coder can use relatively longer filters for certain motion vectors pointing to certain sub-pixel positions and relatively shorter filters for motion vectors pointing to other sub-pixel positions, where a longer filter generally refers to an interpolation filter with a greater number of filter coefficients, also called taps, while a shorter filter generally refers to an interpolation filter with fewer taps. | 10-13-2011 |
20110249738 | MOVING IMAGE ENCODING APPARATUS, MOVING IMAGE DECODING APPARATUS, MOVING IMAGE ENCODING METHOD, MOVING IMAGE DECODING METHOD, MOVING IMAGE ENCODING PROGRAM, MOVING IMAGE DECODING PROGRAM, AND MOVING IMAGE ENCODING/ DECODING SYSTEM - In order to improve the encoding efficiency while avoiding an increase in the size or memory band of a frame memory and having adaptability in the encoding/decoding processing of a moving picture, a bit length extension converter converts a target picture having a bit length N into an extended target picture having a bit length M, a compressor encodes the converted picture, and an expander restores the encoded picture. Then, a bit length reduction converter converts the picture into a reproduction picture having a bit length L smaller than the bit length M, and this reproduction picture is stored in a frame memory as a reference picture. | 10-13-2011 |
20110249739 | CONTEXT ADAPTIVE DIRECTIONAL INTRA PREDICTION - Enhanced directional prediction apparatus and methods are taught which are based on edge-based adaptive directional estimation, for providing an improved prediction direction for intra prediction within a coding device. Image gradient vectors are obtained for pixels in the neighborhood of the current block, and edge directions determined. Candidate edge directions are processed to derive a dominant edge direction in response to defining an objective function as a summation of projections to a candidate direction and computing suggested direction of each neighboring pixel. The dominant edge direction may be utilized for the prediction direction, such as in response to a detection mode flag signaled to the decoder, or modified by an angular adjustment, which can be communicated to a decoder. | 10-13-2011 |
20110261880 | BOUNDARY ADAPTIVE INTRA PREDICTION FOR IMPROVING SUBJECTIVE VIDEO QUALITY - Described herein are apparatus and methods for enhancing perceived visual quality of video which has been coded using enhanced intra predictive coding referred to as boundary adaptive intra predictions (BAIP). BAIP is performed in response to the type of prediction, and the smoothness of the boundary between a current block and its neighboring pixels which have already been coded. Intra prediction is performed separately for each pixel along the left side and/or top side within a current block, which takes into account the pixel itself and multiple pixels along the left and/or top border of that current block. The BAIP technique can be applied for different block sizes, including 4×4, 8×8, and 16×16, and includes vertical, horizontal, and DC intra predictions. | 10-27-2011 |
20110261881 | METHOD AND APPARATUS FOR TRANSMITTING A CODED VIDEO SIGNAL - A method and apparatus for transmitting a digitally encoded video image in real time via a data network wherein the video image is digitally encoded using a compression algorithm having a variable bit rate, e.g., JPEG2K, to provide an encoded data stream, the encoded data stream is fed into a buffer of known size, and the data is read from the buffer via a streamer with a controllable bit rate to provide a bit stream at a desired stream bit rate for transmission via the network. The bit rate of the encoded data stream from the encoder is monitored by a predictor and predicts a future bit rate of the encoded data stream; and, the bit rate of at least one of the encoder and the streamer is adjusted to provide the desired streaming bit rate. | 10-27-2011 |
20110268188 | BLOCK MODE ENCODING/DECODING METHOD AND APPARATUS, AND METHOD AND APPARATUS FOR IMAGE ENCODING/DECODING USING THE SAME - The present disclosure relates to method and apparatus for block mode encoding/decoding and a method and apparatus for video encoding/decoding using the same. The disclosure provides a block mode encoding apparatus that predicts the block mode of a current block and encodes the block mode of the current block depending on whether the block mode of the current block is same as the block mode predicted, to output encoded mode information. The disclosure can reduce the quantity of bits used to encode information on the block mode, thus enhancing the efficiency of video compression. | 11-03-2011 |
20110274164 | METHODS AND APPARATUS FOR TRANSFORM SELECTION IN VIDEO ENCODING AND DECODING - There are provided methods and apparatus for transform selection in video coding. An apparatus includes a video encoder for encoding at least a block in a picture by selecting a transform to apply to a residue of the block from a set of two or more available transforms. The transform is selected based on at least one of an inter prediction mode used to predict at least one reference for the block, one or more values corresponding to a motion vector, a value of a residue of one or more previously encoded blocks, a value of prediction data for the block, one or more transform selections of one or more neighboring reconstructed blocks, and a quantization step applied to transform coefficients for the residue of the block. | 11-10-2011 |
20110274165 | PARAMETER SELECTION METHOD, PARAMETER SELECTION APPARATUS, PROGRAM, AND RECORDING MEDIUM - Provided that a first segment is an earliest time segment included in a discrete time segment, and a second segment is a time segment subsequent to the first segment, a positive second-segment parameter that corresponds to a weakly monotonically increasing function value of an average amplitude of prediction residuals in a time segment including the second segment is used as a parameter for variable length coding of prediction residuals in the second segment. In addition, a value that corresponds to a weakly monotonically increasing function value of the sum of the second-segment parameter and a positive additional value that corresponds to an index representing the prediction effectiveness of time-series signals in the time segment including the second segment is used as a parameter for variable length coding of the prediction residual at a certain discrete time in the first segment. | 11-10-2011 |
20110274166 | Method And Apparatus For Processing Video Signals Using Boundary Intra Coding - A boundary intra coding flag is obtained according to a current macroblock type. When the boundary intra coding flag indicates that the current macroblock is coded in an intra prediction mode using boundary intra coding, boundary coding information is obtained, and a boundary in the current macroblock is induced based on the boundary coding information. Therefore, the regions divided by the boundary can be coded in the intra prediction mode. The accuracy of a predicted pixel value can be improved by performing the intra prediction for regions divided by the boundary. Accordingly, the residual data transmitted to a decoder can be reduced. | 11-10-2011 |
20110274167 | VIDEO CODING SYSTEM USING SUB-CHANNELS AND CONSTRAINED PREDICTION REFERENCES TO PROTECT AGAINST DATA TRANSMISSION ERRORS - A coding technique is disclosed in which frames of a video sequence are assigned to one of a plurality of sub-channels to be transmitted to a decoder. The frames are coded according to predictive coding techniques such that ordinarily prediction references of the frames in each sub-channel only reach the reference frames that occur within the same sub-channel. Thus, if transmission errors arise with respect to one sub-channel, decoding may occur for another sub-channel until the transmission error is detected and corrected. | 11-10-2011 |
20110274168 | INTRAPREDICTION ENCODING/DECODING METHOD AND APPARATUS - An intraprediction encoding/decoding method and apparatus are provided. The intraprediction encoding method includes forming a flipped reference block by flipping pixels of a reference block used for intraprediction symmetrically with respect to a straight line of a predetermined direction passing through the center of the reference block, and performing intraprediction using the flipped reference block. | 11-10-2011 |
20110280304 | INTRA PREDICTION MODES - New intra angular prediction modes and methods for decoding are offered for providing greater accuracy when processing predictions of digital video data blocks. One new method considers predicting a current prediction sample by taking the linear interpolation of two previously reconstructed reference samples that lay along a common angular line. Another new method offers a method for making previously unavailable samples from a neighboring block available as reference samples when predicting a current prediction sample. Another new method considers a new combined intra prediction mode that utilizes a local mean to predict a current prediction sample. And a new decoding method offers to rearrange the order in which video data blocks are predicted based on the intra prediction mode used for predicting the video data blocks. | 11-17-2011 |
20110280305 | IMAGE PROCESSING DEVICE, DECODING METHOD, INTRA-FRAME DECODER, METHOD OF DECODING INTRA-FRAME AND INTRA-FRAME ENCODER - Adopted is a decoder, in which on condition that a prediction block shown by vector information extracted from a data stream, and a decode-target block have an overlap where respective pixels overlay each other, pixel information of an already-decoded portion at a distance of an integer multiple of a vector provided by the vector information from the overlap is made a prediction signal instead of the overlap, and the prediction signal is added to difference image data taken from the data stream to generate reproduction image data. The decoder is adopted for an intra-frame decoder, a local decoder of an encoder, and the like. According to a fundamental rule concerning a repetitive pattern of an image, a pixel at a distance of an integer multiple is a like pixel, and therefore the process of decoding can be performed efficiently. | 11-17-2011 |
20110286520 | METHODS AND APPARATUS FOR IMPLICIT AND SEMI-IMPLICIT INTRA MODE SIGNALING FOR VIDEO AND DECODERS - Methods and apparatus are provided for implicit and semi-implicit intra mode signaling for video encoders and decoders. An apparatus includes an encoder for encoding picture data for at least a portion of a picture. The encoder derives an intra mode to apply to the portion from neighboring template data and abstains from explicitly signaling the intra mode for the portion. The neighboring template data corresponds to a neighboring template formed from neighboring pixels with respect to the portion. | 11-24-2011 |
20110286521 | METHOD AND DEVICE FOR ENCODING AN IMAGE USING A PREDICTION MASK DECODING METHOD AND DEVICE AND CORRESPONDING SIGNALS AND COMPUTER PROGRAMS - A method is provided for encoding at least one image, divided into macroblocks, one macroblock including a set of blocks de pixels. The method includes, for at least one current macroblock of a current image, at least two iterations of the following steps: allocation of a priority level for encoding to at least one pixel of the current macroblock, selection of a pixel with the highest priority level called the priority pixel, prediction of a set of pixels including the priority pixel and a step of encoding a remainder from prediction for a region made up of predicted pixels of the macroblock, called the predicted region, the encoding step being used as and when the predicted region meets a predetermined encoding criterion. | 11-24-2011 |
20110286522 | SELECTING ENCODING TYPES AND PREDICTIVE MODES FOR ENCODING VIDEO DATA - In some embodiments, a method of determining encoding type and predictive mode(s) selections for a macroblock of a video frame is provided. In some embodiments, a general method 1) selects the encoding type (16×16 or 4×4) that is initially considered for a macroblock using an encoding type selection algorithm (based on an attribute of the macroblock that is easy to compute), 2) if the 16×16 encoding type is selected in step 1, consider the four 16×16 prediction modes that may be used on the macroblock using conventional methods or an improved 16×16 predictive mode search algorithm based on distortion thresholds, and 3) if the 4×4 encoding type is selected in step 1, select the 4×4 prediction mode to be used for each of the sixteen 4×4 blocks of the macroblock using conventional methods or an improved 4×4 predictive mode search algorithm based on the positional relationships between predictive modes. | 11-24-2011 |
20110292999 | SUPER MACRO BLOCK BASED INTRA CODING METHOD AND APPARATUS - Provided are technologies that may perform intra coding of a super macro block that is an enlarged macro block. In this case, the super macro block is handled as a single entity or may be divided into a plurality of macro blocks. The present invention may perform intra coding both when the super macro block is handled as the single entity and when the super macro block is divided into the plurality of macro blocks. | 12-01-2011 |
20110293000 | IMAGE PROCESSOR, IMAGE DISPLAY APPARATUS AND IMAGE PROCESSING METHOD - In one embodiment, an image processor includes: a decoder configured to decode a coded moving image signal, and generate a decoded moving image signal; an output module configured to output a picture type of a field or a frame of the decoded moving image signal; a detector configured to detect an inter-frame difference of the field or the frame of the decoded moving image signal at least every time the output picture type is changed; a flicker reduction module configured to reduce flicker noise included in the decoded moving image signal by using the decoded moving image signal of a plurality of the fields and frames; and a controller configured to control a strength of the reduction effect of the flicker noise with respect to the field or the frame of a same picture type as the changed picture type based on the inter-frame difference. | 12-01-2011 |
20110293001 | NEW PLANAR PREDICTION MODE - New intra planar modes are introduced for predicting digital video data. As part of the new intra planar modes, various methods are offered for predicting a first sample within a prediction unit, where the first sample is needed for referencing to when processing the new intra planar modes. And once the first sample is successfully predicted, the new intra planar modes are able to predict a sample of video data within the prediction unit by processing a bi-linear interpolation of four previously reconstructed reference samples. | 12-01-2011 |
20110293002 | METHODS AND APPARATUS FOR TRANSFORM SELECTION IN VIDEO ENCODING AND DECODING - There are provided methods and apparatus for transform selection in video coding. An apparatus includes a video encoder for encoding at least a block in a picture by selecting a transform to apply to a residue of the block from a set of two or more available transforms. The transform is selected based on at least one of an inter prediction mode used to predict at least one reference for the block, one or more values corresponding to a motion vector, a value of a residue of one or more previously encoded blocks, a value of prediction data for the block, one or more transform selections of one or more neighboring reconstructed blocks, and a quantization step applied to transform coefficients for the residue of the block. | 12-01-2011 |
20110293003 | METHODS AND APPARATUS FOR BIT DEPTH SCALABLE VIDEO ENCODING AND DECODING UTILIZING TONE MAPPING AND INVERSE TONE MAPPING - Methods and apparatus are provided for bit depth scalable video encoding and decoding utilizing tone mapping and inverse tone mapping. An apparatus includes an encoder ( | 12-01-2011 |
20110305277 | SYSTEM AND METHOD FOR CONTENT ADAPTIVE CLIPPING - A system and method of content adaptive pixel intensity processing are described. In video processing system, due to various mathematic operations applied to the data, the processed video data may be become exceeding a range of original data and result in artifacts. Content adaptive clipping method is disclosed which takes into account the dynamic characteristics of the video data. Accordingly the method configures the video data into a predefined set which can be a partial picture, a frame or a group of frames. The data range of the original associated with the predefined set is determined The processed video data is clipped according to the range computed for the predefined set. | 12-15-2011 |
20110305278 | Method of accessing a spatio-temporal part of a video sequence of images - The invention concerns a method and a device for accessing a spatio-temporal part of a video sequence of images compressed using a coding format implementing a prediction. | 12-15-2011 |
20110305279 | Tertiary Content Addressable Memory Based Motion Estimator - Presented herein are Tertiary Content Addressable Memory based motion estimator(s). In one embodiment, there is presented a method for encoding a picture. The method comprises addressing a first memory with one or more data words for a first prediction block, and addressing a second memory with one or more data words for a second prediction block while addressing the first memory. | 12-15-2011 |
20110310966 | SYNTAX ELEMENT DECODING - Techniques for efficient syntax element decoding in a system employing context-based adaptive binary arithmetic decoding are disclosed herein. In some embodiments, a video decoding system includes a context-based adaptive binary arithmetic code (“CABAC”) decoder. The decoder includes a processor and decode logic executed by the processor. The decode logic is configured to decompress a CABAC encoded syntax element. The decode logic includes a table embodying a set of rules that determine whether syntax element decoding is complete based on table addressing derived from a decoded syntax element binary value. | 12-22-2011 |
20110310967 | Method and System for Video and Image Coding Using Pattern Matching for Intra-Prediction - A method and system are provided in which a device can determine, for a current block of pixels, a first intra-prediction based on reconstructed neighboring pixels and a second intra-prediction based on a pattern match with a reconstructed block of pixels. One of the two intra-predictions may be selected to generate a compressed bit stream comprising information of the current block of pixels. The intra-prediction selection may be performed on a block-by-block basis. An indication may be generated as to which of the two intra-predictions was selected for a particular block of pixels. When pattern matching is selected, a positional relationship of the reconstructed block of pixels with the matching pattern may be encoded and embedded into the compressed bit stream. The same device or another device may be operable to receive a compressed bit stream comprising intra-prediction selection and/or positional relationship information to reconstruct a current block of pixels. | 12-22-2011 |
20110310968 | METHOD AND APPARATUS FOR DETERMINING A SECOND PICTURE FOR TEMPORAL DIRECT-MODE BLOCK PREDICTION - A method for determining a first and a second reference picture used for inter-prediction of a macroblock, comprising the steps of (A) finding a co-located picture and block, (B) determining a reference index, (C) mapping the reference index to a lowest valued reference index in a current reference list and (D) using the reference index to determine the second reference picture. | 12-22-2011 |
20110317759 | SYSTEM, METHOD, AND COMPUTER PROGRAM PRODUCT FOR PARAMETER ESTIMATION FOR LOSSLESS VIDEO COMPRESSION - Methods and systems to improve the efficiency of video processing. Compression/decompression efficiency for a current frame may be enhanced by using an appropriate coding parameter. To choose an appropriate coding parameter, a histogram of the previous frame's symbols may be created. The histogram may be used to predict the number of bits the current frame will contain after lossless compression, given a specific coding parameter. Iterating through all of the possible coding parameters on the previous frame histogram may yield a well-suited coding parameter with which the current frame can be compressed. This results in high compression efficiency by using the previous frame as the predictor. | 12-29-2011 |
20110317760 | SIGNALING VIDEO SAMPLES FOR TRICK MODE VIDEO REPRESENTATIONS - This disclosure describes techniques relevant to HTTP streaming of media data. According to these techniques, a server device may signal a byte range for at least one intra-decodable (I-frame) of a video fragment. According to the techniques of this disclosure, a client device may communicate a request to a server device to retrieve the at least one I-frame based on the signaled byte range, and use the retrieved I-frame to provide a high speed version of a video presentation that includes the at least one I-frame. A high speed version of a video presentation may be a trick mode of the video presentation, such as a fast forward or fast rewind version of the video presentation. | 12-29-2011 |
20110317761 | IMAGE CODING APPARATUS AND IMAGE CODING METHOD - There is provided an image coding apparatus for outputting an image stream in which random access and easy editing are possible without reducing encoding efficiency. The image coding apparatus sets, in the image stream, a picture in which the random access is possible based on camera control data or correlation between the images. | 12-29-2011 |
20120002725 | Video coding apparatus and video coding control method - In a video coding apparatus, a plurality of coding units perform compression coding of a single source stream of video data. A control unit controls those coding units in such a way that all the coding units produce respective interframe coded pictures with identical playback times as a first-coded picture in a picture group (e.g., GOP) and produce identical local decoded pictures based on the respective intraframe coded pictures. A selection decision unit makes a selection, for each picture group, of one of the coded video data from the coding units on the basis of their coding results. According to this selection, a selection unit selectively outputs one of the coded video data. This output switching operation is performed at a point immediately before a forward interframe predictive coded picture that appears first of those in a picture group included in each of the coded video data outputs being switched. | 01-05-2012 |
20120008680 | METHODS AND DEVICES FOR DATA COMPRESSION USING ADAPTIVE RECONSTRUCTION LEVELS - Encoding and decoding methods that perform quantization using adaptive reconstruction levels are presented. The reconstruction levels for a given partitioning of the data space may be selected based upon the distribution of data points within each sub-part defined by the partitioning. In some cases, the adaptive reconstruction levels may be based upon an average of the data points within each sub-part. In some cases, the adaptive reconstruction levels may be selected using a rate-distortion analysis including the quantization distortion associated with the levels versus the data points and the rate associated with transmitting the encoded adaptive reconstruction levels. The methods relate to data compression in a range of applications including audio, images and video. | 01-12-2012 |
20120008681 | LOSS-ROBUST VIDEO TRANSMISSION USING TWO DECODERS - Disclosed herein is a method of decoding a sequence of prediction-coded video frames using a primary and a secondary state-dependent decoder. The method includes receiving an incomplete frame at the primary decoder, copying a state of the primary decoder into the secondary decoder, decoding and outputting the incomplete frame and subsequent frames at the primary decoder, receiving data restoring the incomplete frame, decoding the restored incomplete frame and subsequent frames at the secondary decoder until the secondary decoder has caught up with the primary decoder; and copying the state of the secondary decoder into the primary decoder; wherein the secondary decoder has access to the subsequent frames received after the incomplete frame. | 01-12-2012 |
20120008682 | VIDEO CODING USING DIRECTIONAL TRANSFORMS - In one example, an apparatus for encoding video data includes a video encoder configured to calculate a residual block for a block of video data based on a predicted block formed using an intra-prediction mode, and transform the residual block using a transform mapped from the intra-prediction mode. In another example, an apparatus includes video encoder configured to receive an indication of a first intra-prediction mode in a first set of intra-prediction modes for a block of video data, determine a second intra-prediction mode from a second set of intra-prediction modes, smaller than the first set of intra-prediction modes, to which the first intra-prediction mode is mapped, determine a directional transform to which the second intra-prediction mode is mapped, and apply the directional transform to residual data of the block. | 01-12-2012 |
20120008683 | SIGNALING SELECTED DIRECTIONAL TRANSFORM FOR VIDEO CODING - In one example, an apparatus for encoding video data includes a video encoder configured to select an intra-prediction mode to use to encode a block of video data, determine whether the block includes a sub-block of a size for which multiple transforms are possible based on the size of the sub-block and the selected intra-prediction mode, when the block includes the sub-block of the size for which multiple transforms are possible based on the size of the sub-block and the selected intra-prediction mode, select one of the multiple possible transforms, transform the sub-block using the selected one of the multiple possible transforms, and provide an indication of the selected one of the multiple possible transforms for the size of the block. | 01-12-2012 |
20120008684 | METHOD AND APPARATUS OF ENCODING AND DECODING VIDEO SIGNAL - Provided are methods and apparatuses for encoding and decoding a video including a plurality of color components. The method of encoding includes: splitting a first color component block and neighboring pixels of the first color component block into N segments, where N is an integer, based on pixel values of the first color component block which have been previously encoded and then restored; splitting a second color component block, corresponding to the first color component block, and neighboring pixels of the second color component block into N segments according to the N segments of the first color component block and the neighboring pixels of the first color component block; predicting the N segments of the second color component block by using the neighboring pixels of the second color component block split into the N segments; and encoding the second color component block, based on a result of the prediction. | 01-12-2012 |
20120014436 | PARALLEL VIDEO CODING BASED ON BLOCK SIZE - A system encoding and decoding video that uses a parallel encoding and decoding technique. | 01-19-2012 |
20120014437 | PARALLEL VIDEO CODING BASED ON SAME SIZED BLOCKS - A system encoding and decoding video that uses a parallel encoding and decoding technique. | 01-19-2012 |
20120014438 | PARALLEL VIDEO CODING BASED ON PREDICTION TYPE - A system encoding and decoding video that uses a parallel encoding and decoding technique. | 01-19-2012 |
20120014439 | PARALLEL VIDEO CODING BASED ON SCAN ORDER - A system encoding and decoding video that uses a parallel encoding and decoding technique. | 01-19-2012 |
20120014440 | PARALLEL VIDEO CODING BASED ON MAPPING - A system encoding and decoding video that uses a parallel encoding and decoding technique. | 01-19-2012 |
20120014441 | PARALLEL VIDEO CODING BASED ON BOUNDARIES - A system encoding and decoding video that uses a parallel encoding and decoding technique. | 01-19-2012 |
20120014442 | IMAGE PROCESSING DEVICE AND IMAGE PROCESSING METHOD - The present disclosure provides an image processing device including, a feature quantity generating section configured to generate a feature quantity used as a determination criterion for determining which of a temporal prediction using correlation between images in a temporal direction and a parallactic prediction using correlation between images of different visual points is dominant in image coding, and a reference index assigning section configured to assign reference indices to reference pictures used in the predictions on a basis of the feature quantity generated by the feature quantity generating section. | 01-19-2012 |
20120014443 | DIFFERENTIAL CODING OF INTRA DIRECTIONS (DCIC) - Spatial domain directional intra prediction has been shown to be very effective to remove the correlation between the pixels in the current block and reconstructed neighbors. In AVC, 8 directional prediction modes (plus the DC prediction mode) are defined. The prediction mode number is signaled to the decoder using a simple predictive coding method. The previous intra prediction methods have two major disadvantages: lack of precision for arbitrary directional patterns and accuracy lack of accuracy to exploit geometric dependency between blocks. To address these issues, a new method accurately predicts the intra directions from reconstructed neighboring pixels and differentially encode the intra directions. This allows a more precise directional prediction without the significant increase in the cost for transmitting the side information. | 01-19-2012 |
20120014444 | METHOD AND APPARATUS FOR ENCODING AND DECODING IMAGE THROUGH INTRA PREDICTION - A method and apparatus for encoding and decoding an image through intra prediction using a pixel of the neighboring block along an extended line having a predetermined gradient about a pixel inside the current block. | 01-19-2012 |
20120027084 | METHODS OF UTILIZING TABLES ADAPTIVELY UPDATED FOR CODING/DECODING AND RELATED PROCESSING CIRCUITS THEREOF - A method of converting first data into second data includes: determining a target symbol corresponding to the first data by utilizing a determining unit; and generating the second data corresponding to the determined target symbol. One of the first data and the second data is a syntax element, and the other of the first data and the second data is an entropy-coded result of the syntax element. The target symbol corresponding to the first data is determined adaptively according to occurrence probability of candidate syntax element values of the syntax element. | 02-02-2012 |
20120027085 | Method for Encoding of a Video Stream - A temporal sequence of pictures is generated in a method for encoding of a first video stream. To do so, a synchronization signal is used which is derived from a second video stream independently of the first video stream, or the encoding of a second video stream independent of the first video stream is based on the same principle as for the encoding of the first video stream. | 02-02-2012 |
20120027086 | PREDICTIVE CODING APPARATUS, CONTROL METHOD THEREOF, AND COMPUTER PROGRAM - A predictive coding apparatus which performs predictive coding for each picture forming a moving picture, comprising: a prediction processing unit configured to perform prediction processing for each predetermined block unit of a picture to be coded, a transformation unit adapted to orthogonally transform and quantize a result of the prediction processing by the prediction processing unit to generate multi-valued data, a binarization unit configured to convert the multi-valued data into binary data, a detection unit configured to detect an amount of the binary data, a coding unit configured to perform arithmetically coding of the binary data to create coded data, and a multiplexing unit configured to multiplex, onto the coded data, information indicating the amount of the binary data detected by the detection unit to generate a coded data stream. | 02-02-2012 |
20120027087 | IMAGE DECODING DEVICE - An image decoding device for processing an input bit stream containing encoded data obtained by encoding a moving picture using intra-frame prediction, includes a stream divider configured to divide the input bit stream into a plurality of sub-streams, and a plurality of image decoders each configured to decode the corresponding one of the plurality of sub-streams, thereby outputting images. The stream divider divides the input bit stream so that the plurality of sub-streams each contain the encoded data corresponding to one or more prediction units, where macroblocks of the moving picture each include a plurality of the prediction units for the intra-frame prediction. | 02-02-2012 |
20120033730 | RANDOM ACCESS POINT (RAP) FORMATION USING INTRA REFRESHING TECHNIQUE IN VIDEO CODING - A random access point can be generated in a stream of coded digital pictures containing a plurality of predictive coded frames in which one or more subsections of each frame are intra coded. A patch frame can be formed from intra-coded subsections in identified consecutive predictive-coded frames. The patch frame can be used as a synthetic random access point. | 02-09-2012 |
20120033731 | VIDEO ENCODING APPARATUS AND VIDEO DECODING APPARATUS - While maintaining a high degree of freedom in choosing partition sizes and transformation sizes adapted for local characteristics of videos, the amount of metadata is decreased. A video encoding apparatus ( | 02-09-2012 |
20120039392 | METHOD OF CODING A VIDEO SIGNAL - The invention relates to methods and apparatuses for encoding and decoding of a video sequence. In connection with encoding/decoding a video sequence it is desirable to increase the video quality without having to increase the bit-rate for the encoded video too much, thereby still providing a bit-efficient representation of the video. If multiple descriptions of the video sequence is used the invention improves the video quality without any increase of the bit-rate. According to the invention, this is achieved by using two or more coding units for encoding the same video sequence, wherein the encoding units perform their encoding operations displaced in time in relation to each other. Correspondingly, two or more decoding units are used for decoding the same video sequence, wherein the decoding units perform their decoding operations displaced in time in relation to each other. | 02-16-2012 |
20120044991 | MOVING IMAGE CODING APPARATUS AND MOVING IMAGE CODING METHOD - A moving image coding apparatus of one embodiment includes a prediction image generator that generates a prediction image abased on a moving image, a processor that performs deblocking process based on residual data that is generated based on a prediction residual being a difference between an input image of the moving image and the prediction image, and the prediction image, and an evaluator that evaluates the deblocking process based on the input image, the residual data, the prediction image, and the deblocked data. The moving image coding apparatus further includes a parameter determiner that calculates a threshold for determining presence or absence of the deblocking process based on a result of the evaluation by the evaluator and determines a parameter for deblocking based on the threshold, and an encoder that codes moving image data based on the prediction residual and the parameter. | 02-23-2012 |
20120044992 | LOW COMPLEXITY ADAPTIVE FILTER - An interim filter determined for a previous series of video blocks can be applied to a current series of video blocks to determine an interim filter map for the current series of video blocks. Based on the interim filter map, a decoding filter can be determined. By applying the decoding filter to the current series of video blocks, a decoding filtering map can be determined. Based on CUs identified as having filtering off by the decoding filtering map, an interim filter for the current series of video blocks can be determined. The decoding filter and decoding filtering map can be transmitted to a decoder, while the interim filter and interim filter map may not be transmitted to a decoder. The interim filter for the current series of video blocks can be used to generate an interim filter map for a next series of video blocks. | 02-23-2012 |
20120044993 | Image Processing Device and Method - The present invention relates to an image processing device and method which enable compression efficiency to be improved. | 02-23-2012 |
20120044994 | IMAGE PREDICTIVE ENCODING AND DECODING DEVICE - An image predictive encoding device can efficiently encode an image, while suppressing an increase in prediction information and reducing the prediction error of a target block. In an image predictive encoding device, according to one embodiment, to produce a prediction signal of a partition in a target region, it is decided whether prediction information of a neighbouring region can be used. When prediction information of the neighbouring region can be used, a region width of the partition where the prediction information of the neighbouring region is used to produce the prediction signal is determined. The prediction signal of the target region is produced from a reconstructed signal based on at least one of the region width, the prediction information of the target region, and the prediction information of the neighbouring region. The prediction information, information identifying the region width, and a residual signal are encoded. | 02-23-2012 |
20120063512 | VIDEO CODING AND DECODING METHOD USING WEIGHTED PREDICTION AND APPARATUS FOR THE SAME - A video coding and decoding method using a weighted prediction and an apparatus for the same are provided. The video coding method includes generating a predicted image for a present block; generating a weighted prediction factor which is a scaling factor of the predicted image that minimizes the difference between the present block and the predicted image; generating a weighted prediction image by multiplying the predicted image by the weighted prediction factor; and coding a residual signal generated by subtracting the weighted prediction image from the present block. | 03-15-2012 |
20120069901 | VIDEO ENCODING APPARATUS, VIDEO DECODING APPARATUS, VIDEO ENCODING METHOD, VIDEO DECODING METHOD, AND COMPUTER PROGRAM - It is a purpose of the present invention to provide a video encoding apparatus, a video decoding apparatus, a video encoding method, a video decoding method, and a computer program, which allow adaptive filter coefficients to be used with a reduced amount of coding. A video encoding apparatus AA selects a suitable coefficient from among multiple kinds of interpolation filter coefficients determined beforehand by means of a component external to the video encoding apparatus AA. Subsequently, the video encoding apparatus AA records identification information uniquely defined for the selected interpolation filter coefficient in control information for each slice. Furthermore, the video encoding apparatus AA uses the interpolation filter coefficient thus selected to generate encoded data c including the identification information uniquely defined for the interpolation filter coefficient thus selected. | 03-22-2012 |
20120069902 | MOVING PICTURE DECODING DEVICE, MOVING PICTURE DECODING METHOD AND INTEGRATED CIRCUIT - An moving picture decoding device includes a receiver that receives data that has been coded according to multi-view coding of pictures that are included in a moving picture and provided for a plurality of views; a first decoder that decodes coded data that is included in the data coded according to the multi-view coding and provided for a first view; and a second decoder that decodes coded data that is included in the data coded according to the multi-view coding and provided for a second view A detector detects a region of the data that cannot be decoded and is among a plurality of regions to be decoded by the first decoder. A concealing unit conceals the predetermined region detected by the detector using decoded data. | 03-22-2012 |
20120069903 | REFERENCE PICTURE LIST CHANGING METHOD OF MULTI-VIEW VIDEO - Disclosed is a method of changing a reference picture list. The present invention includes parsing a profile identifier and a slice type from a multiview video bitstream, obtaining inter-view reference information based on the profile identifier, initializing a reference picture list using the inter-view reference information, and modifying the reference picture list in consideration of the slice type. Accordingly, the present invention defines profile information indicating a stereo video, thereby coding a multiview video signal more efficiently. | 03-22-2012 |
20120076204 | METHOD AND APPARATUS FOR SCALABLE MULTIMEDIA BROADCAST USING A MULTI-CARRIER COMMUNICATION SYSTEM - A wireless distribution system is provided where multiple carrier frequencies/channels are used to facilitate transmission of scalable multimedia content. Some carrier frequencies are assigned to carry base layer data for one or more program/content channels and some other carrier frequencies are assigned to carry data for one or more enhancement layers associated with the base layer data of one or more program/content channels. The enhancement layer carrier frequency may be shared among program/content channels transmitted over multiple different base layer carrier frequencies. Different numbers of enhancement layers and their bandwidth may correspond to different refinements of the multimedia content. | 03-29-2012 |
20120076205 | Methods and Systems for Capturing Wide Color-Gamut Video - Aspects of the present invention relate to systems and methods for capturing, encoding and decoding wide color-gamut video. According to a first aspect of the present invention, a plurality of processed image frames are associated with a legacy bit-stream, and a plurality of unprocessed image frames are associated with an enhancement bit-stream. | 03-29-2012 |
20120082217 | MOTION COMPENSATION USING DECODER-DEFINED VECTOR QUANTIZED INTERPOLATION FILTERS - The present disclosure describes use of dynamically assignable interpolation filters as part of motion compensated prediction. An encoder and a decoder each may store common codebooks that define a variety of interpolation filters that may be applied to predicted video data. During runtime coding, an encoder calculates characteristics of an ideal interpolation filter to be applied to a reference block that would minimize prediction error when the reference block would be used to predict an input block of video data. Once the characteristics of the ideal filter are identified, the encoder may search its local codebook to find a filter that best matches the ideal filter. The encoder may filter the reference block by the best matching filter stored in the codebook as it codes the input block. The encoder also may transmit an identifier of the best matching filter to a decoder, which will use the interpolation filter on predicted block as it decodes coded data for the block. The encoder and decoder may build their codebooks and maintain them independently from the other but in synchronism. The encoder and decoder may use decoded pixel block data as source data for calculation of interpolation filters. | 04-05-2012 |
20120082218 | Methods and Systems for Entropy Coder Initialization - Aspects of the present invention are related to systems and methods for initialization of entropy encoders and decoders. | 04-05-2012 |
20120082219 | Content adaptive deblocking during video encoding and decoding - Disclosed herein are exemplary embodiments of methods, apparatus, and systems for performing content-adaptive deblocking to improve the visual quality of video images compressed using block-based motion-predictive video coding. For instance, in certain embodiments of the disclosed technology, edge information is obtained using global orientation energy edge detection (“OEED”) techniques on an initially deblocked image. OEED detection can provide a robust partition of local directional features (“LDFs”). For a local directional feature detected in the partition, a directional deblocking filter having an orientation corresponding to the orientation of the LDF can be used. The selected filter can have a filter orientation and activation thresholds that better preserve image details while reducing blocking artifacts. In certain embodiments, for a consecutive non-LDF region, extra smoothing can be imposed to suppress the visually severe blocking artifacts. | 04-05-2012 |
20120082220 | INTRA-MODE PREDICTION FOR A VIDEO TRANSCODER - A video transcoder for converting an encoded input video bit-stream having one spatial resolution into an encoded output video bit-stream having a lower spatial resolution, wherein learned statistics of intra-mode transcoding are used to constrain the search of intra modes for the output video bit-stream. The statistics of intra-mode transcoding can be gathered, e.g., by applying brute-force downsizing to a training set of video frames and then analyzing the observed intra-mode transcoding patterns to determine a transition-probability matrix for use during normal operation of the transcoder. The transition-probability matrix enables the transcoder to select appropriate intra modes for the output video bit-stream without performing a corresponding exhaustive full search, which advantageously reduces the computational complexity and processor load compared to those of a comparably performing prior-art video transcoder. | 04-05-2012 |
20120082221 | Multiple Predictor Set For Intra Coding with Intra Mode Prediction - An apparatus comprising a codec configured to predict an intra mode for a considered block based on a plurality of group numbers and a plurality of corresponding group indices for a plurality used modes of a plurality of adjacent blocks to the considered block, wherein a group number corresponding to an actual intra mode for the considered block is coded and sent if the predicted intra mode does not match the actual intra mode. Also disclosed is a network component comprising a processor configured to predict an intra mode for a considered block based on a minimum group number and a minimum group index of two used modes for two adjacent blocks of the considered block, and a transmitter configured to send coded bits of a group number for an actual intra mode for the considered block if the actual intra mode does not match the predicted intra mode. | 04-05-2012 |
20120082222 | VIDEO CODING USING INTRA-PREDICTION - In general, techniques of this disclosure are related to determining a prediction characteristic associated with a coding unit of video data, wherein determining the prediction characteristic includes determining a prediction type that defines a number of prediction units associated with the coding unit. Techniques of this disclosure may also be related to generating a set of available intra-prediction modes for the coding unit based on the prediction characteristic, selecting an intra-prediction mode from the available intra-prediction modes, and applying one of the available intra-prediction modes to code the coding unit. | 04-05-2012 |
20120082223 | INDICATING INTRA-PREDICTION MODE SELECTION FOR VIDEO CODING - For a block of video data, a video encoder can signal to a video decoder a selected intra-prediction mode using a codeword that is mapped to a modified intra-prediction mode index. The video decoder can receive the codeword, determine the modified intra-prediction mode index corresponding to the codeword, determine most probable modes based on a context, map the modified intra-prediction mode index to an intra-prediction mode index by comparing the modified intra-prediction mode index to the mode indexes of the most probable modes, and determine the selected intra-prediction mode used to encode the block of video data based on the intra-prediction mode index. | 04-05-2012 |
20120082224 | INTRA SMOOTHING FILTER FOR VIDEO CODING - This disclosure relates to techniques for reducing the amount of additional data encoded with a block encoded using intra-predictive coding. Particularly, the techniques provide apparatus and methods of applying a smoothing filter to prediction samples used in intra-predictive coding. For example, in fixed mode-dependent intra-predictive coding, a video encoder may determine the type of smoothing filter applied to prediction samples based on block size and intra-prediction mode combination associated with the current block, where the combination is used to look up a filter in a first filter table. In adaptive mode-dependent intra-predictive coding, the encoder uses two filters, one from the first filter table and another from a second filter table, applies both filters, and determines which yields better results. When the second filter table filter yields better results, the encoder encodes a filtering indication. When a filter from the first filter table is used, no filtering indication is encoded. | 04-05-2012 |
20120082225 | SELECTIVE INDICATION OF TRANSFORM SIZES - During a video encoding process, a video encoder may transform the residual data of a coding unit (CU) using a single transform if the CU only has a single prediction unit (PU). If the CU has multiple PUs, the video encoder may transform the residual data using multiple transforms. The video encoder outputs an indication of the size of a transform used to transform residual data of the CU only when the CU has more than one PU. If a video decoder receives such an indication, the video decoder may reconstruct residual data of the CU using a transform of the indicated size. Otherwise, the video decoder may reconstruct the residual data of the CU using a transform having same size as the CU. | 04-05-2012 |
20120082226 | SYSTEMS AND METHODS FOR ERROR RESILIENT SCHEME FOR LOW LATENCY H.264 VIDEO CODING - A new approach is proposed that contemplates systems and methods to support error resilient coding of H.264 compatible video streams for low latency/delay multimedia communication applications by utilizing and integrating a plurality of error resilient H.264 encoding/decoding schemes in an efficient manner. These error resilient H.264 encoding/decoding schemes can be used to offer a better quality video even when there is network loss of picture frames in the video stream. It has the ability to recover from such loss and recover faster than other techniques without requiring additional data/frames to be sent over the network to achieve the same level of recovery. | 04-05-2012 |
20120087410 | METHOD AND SYSTEM FOR GENERATING A TRANSFORM SIZE SYNTAX ELEMENT FOR VIDEO DECODING - In a video processing system, a method and system for generating a transform size syntax element for video decoding are provided. For high profile mode video decoding operations, the transform sizes may be selected based on the prediction macroblock type and the contents of the macroblock. A set of rules may be utilized to select from a 4×4 or an 8×8 transform size during the encoding operation. Dynamic selection of transform size may be performed on intra-predicted macroblocks, inter-predicted macroblocks, and/or direct mode inter-predicted macroblocks. The encoding operation may generate a transform size syntax element to indicate the transform size that may be used in reconstructing the encoded macroblock. The transform size syntax element may be transmitted to a decoder as part of the encoded video information bit stream | 04-12-2012 |
20120093220 | IN-LOOP DEBLOCKING FOR INTRA-CODED IMAGES OR FRAMES - Methods and encoders/decoders for applying in-loop deblocking to intra-coded images/frames. In a decoding context, a deblocking filter is applied to reconstructed pixels of an intra-coded block prior to decoding the subsequent block in the decoding sequence. In an encoding context, a deblocking filter is applied to reconstructed pixels of an intra-coded block in an inter-coding loop before encoding a subsequent block in the coding order for the image. | 04-19-2012 |
20120099645 | METHOD AND APPARATUS FOR NON-LINEAR DECODING OF VIDEO FRAMES OF A VIDEO STREAM ENCODED USING AN INTRA MACROBLOCK REFRESH PROCESS - A video decoder system receives a user request for non-linear decoding of at least one video frame from a video stream encoded using an Intra macroblock refresh process. The request includes a first frame offset corresponding to a user requested first decoding frame within the video stream for commencing the non-linear decoding. The decoder system: determines an Intra-refresh period corresponding to at least one encoded Predictive frame in the video stream during which all macroblocks in the user requested first decoding frame are Intra encoded at least once; determines a second frame offset as a function of the Intra-refresh period and the user requested first frame offset, the second frame offset corresponding to a second decoding frame within the video stream. Finally, the decoder system decodes the video stream starting at the second decoding frame and suppresses the display of the video stream until the first decoding frame. | 04-26-2012 |
20120099646 | ADAPTIVE SCANNING OF TRANSFORM COEFFICIENTS FOR VIDEO CODING - In an example, an apparatus for decoding video data includes a video decoder that is configured to determine a number of transform coefficients associated with a block of video data, and to determine whether the number of transform coefficients exceeds a predetermined threshold. The video decoder is also configured to identify a scan order when the number of transform coefficients exceeds the predetermined threshold, wherein the scan order indicates an order in which the transform coefficients have been serialized from a two-dimensional array to a one-dimensional array, and to apply the scan order to inverse scan the number of transform coefficients associated with a block of video data. | 04-26-2012 |
20120099647 | METHOD AND APPARATUS FOR VARIABLE ACCURACY INTER-PICTURE TIMING SPECIFICATION FOR DIGITAL VIDEO ENCODING - A method and apparatus for variable accuracy inter-picture timing specification for digital video encoding is disclosed. Specifically, the present invention discloses a system that allows the relative timing of nearby video pictures to be encoded in a very efficient manner. In one embodiment, the display time difference between a current video picture and a nearby video picture is determined. The display time difference is then encoded into a digital representation of the video picture. In a preferred embodiment, the nearby video picture is the most recently transmitted stored picture. For coding efficiency, the display time difference may be encoded using a variable length coding system or arithmetic coding. In an alternate embodiment, the display time difference is encoded as a power of two to reduce the number of bits transmitted. | 04-26-2012 |
20120099648 | Apparatus and Method for Decoding Picture Data - A coding apparatus for hierarchically (layering) coding top field data and bottom field data divided from each of a plurality of picture data composing a moving picture image has a first coding unit configured to encode one field data between two field data of the top field data and the bottom field data divided from the picture data, a conversion unit configured to interpolate first predicted image data generated by the first coding unit encoding above one field data and generate a second predicted image data of a scanning position of the other field data between the two field data, and a second coding unit configured to encode the other field data between the two field data based on the second predicted image data generated by the conversion unit. | 04-26-2012 |
20120106632 | METHOD AND APPARATUS FOR ERROR RESILIENT LONG TERM REFERENCING BLOCK REFRESH - A system and method for coding video data wherein a pixel block may be coded for refresh with reference to an LTR frame that was successfully transmitted, or has a high probability of having been successfully transmitted from the encoder to the decoder. Not all pixel blocks in the frame may be refreshed at the same rate. Pixel blocks containing edge details, containing a significant object, or containing foreground image data may be refreshed more often than pixel blocks containing smooth, background, or relatively less significant image data. | 05-03-2012 |
20120106633 | APPARATUS AND METHOD FOR IMAGE ENCODING/DECODING CONSIDERING IMPULSE SIGNAL - An apparatus and method for video encoding/decoding considering impulse signal are disclosed. The method for video encoding includes generating a predicted block from predicting a current block and subtracting the predicted block from the current block to generate an M×N residual block, and encoding an A×B residual block containing residual signals of an impulsive component in the M×N residual block to generate a bitstream. The apparatus and the method of the present disclosure improve coding efficiency by efficiently encoding or decoding the residual signals of the impulse component in encoding or decoding videos. | 05-03-2012 |
20120106634 | METHOD AND APPARATUS FOR PROCESSING MULTI-VIEW VIDEO SIGNAL - Disclosed is a method of processing a video signal. the present invention includes obtaining inter-view reference flag information on a picture of a base view, if the picture of the base view is used for an inter-view prediction in accordance with the inter-view reference flag information, obtaining picture coding structure flag for the picture of the base view, generating a reference picture list for the inter-view prediction based on the picture coding structure flag, and predicting a pixel value of a picture of a non-base view using the reference picture list for the inter-view prediction. Accordingly, the present invention defines profile information indicating a stereo video, thereby coding a multiview video signal more efficiently. The present invention re-defines an access unit, thereby performing inter-view prediction without being restricted by a coding format of an inter-view reference picture in decoding a stereo video. | 05-03-2012 |
20120106635 | ENCODER, ENCODING METHOD, AND PROGRAM - An encoder including a code amount prediction unit predicting the amount of code of data to be encoded, the code amount prediction unit including a conversion unit converting input syntax elements to symbol data, and a measurement unit measuring the predicted amount of code of the data to be encoded on the basis of the number of times of renormalization processing performed on each bit in an arithmetic encoding process applied to the symbol data. | 05-03-2012 |
20120106636 | IMAGE ENCODING/DECODING METHOD AND APPARATUS - The present disclosure relates to a video encoding/decoding method and provides a video encoding apparatus including: an intra-prediction mode determiner for determining an intra prediction mode of current block entitled an encoder prediction mode by using candidate intra-predictable mode set including intra-prediction mode candidates being selected from a whole and predictable by video decoding apparatus; an encoder for encoding residual block from subtracting predicted block from predicting the current block by the encoder prediction mode from current block; a mode information generator for generating mode information depending on whether the video decoding apparatus can predict the encoder prediction mode; and an encoded data generator for generating encoded data including an encoded residual block and the mode information. The present disclosure selectively encodes mode information on the intra-prediction mode to reduce the bit rate of encoded data from encoding video and improve video compression efficiency and quality of compressed video. | 05-03-2012 |
20120114036 | Method and Apparatus for Multiview Video Coding - The present invention relates to method and apparatus for multiview video coding. In particular, the present invention describes a disparity compensated prediction to exploit the inter-view correlation in multiview video coding by providing stretching, compression, and shearing (SCSH) disparity compensation to approximate the actual disparity effects in addition to the translational disparity. A sub-sampled block-matching disparity estimation technique is provided to implement the SCSH disparity compensation which makes use of the interpolated reference frames for subpixel motion and disparity estimation in conventional hybrid video coding structure. | 05-10-2012 |
20120114037 | COMPRESSING AND DECOMPRESSING MULTIPLE, LAYERED, VIDEO STREAMS EMPLOYING MULTI-DIRECTIONAL SPATIAL ENCODING - A process for compressing and decompressing non-keyframes in sequential sets of contemporaneous video frames making up multiple video streams where the video frames in a set depict substantially the same scene from different viewpoints. Each set of contemporaneous video frames has a plurality frames designated as keyframes with the remaining being non-keyframes. In one embodiment, the non-keyframes are compressed using a multi-directional spatial prediction technique. In another embodiment, the non-keyframes of each set of contemporaneous video frames are compressed using a combined chaining and spatial prediction compression technique. The spatial prediction compression technique employed can be a single direction technique where just one reference frame, and so one chain, is used to predict each non-keyframe, or it can be a multi-directional technique where two or more reference frames, and so chains, are used to predict each non-keyframe. | 05-10-2012 |
20120114038 | METHOD AND APPARATUS FOR ENCODING AND DECODING VIDEO SIGNAL ACCORDING TO DIRECTIONAL INTRA RESIDUAL PREDICTION - A method and apparatus for encoding and decoding a video signal according to directional intra-residual prediction. The video encoding method of the present invention includes calculating first residual data by performing directional intra-prediction on a first block of a base layer with reference to a second block of the base layer, calculating second residual data by performing directional intra-prediction on a third block of an enhancement layer that corresponds to the first block of the base layer with reference to a fourth block of the enhancement layer that corresponds to the second block of the base layer, and encoding the third block according to the directional intra-residual prediction by obtaining third residual data that is a difference between the first residual data and the second residual data. | 05-10-2012 |
20120121013 | Apparatus, A Method and a Computer Program for Video Coding - There is disclosed an apparatus, a method and a computer program for video coding. The apparatus comprises a selector configured for selecting an encoding method from a set of encoding methods comprising at least a first encoding method and a second encoding method for encoding a block of pixels of an image. The selector is further configured for selecting at least one control point among the pixels of said block of pixels; and selecting a first reference point different from said control point. The apparatus further comprises a determinator configured for determining values of the other pixels of said selected block of pixels on the basis of the value of said control point and the value of said at least one reference point. | 05-17-2012 |
20120121014 | Processing of Multimedia Data - The invention relates to techniques for processing media data at a receiver device in a packet-switched network. It is proposed to detect data packet losses in the media data, and to determine data frames, like P-frames or I-frames, within a group of successive frames, like the GOP structure, affected by a packet loss. The number of the affected data frames is compared with a threshold value and if said number is equal or higher then the threshold value, then it is proposed to drop the affected data frames and to provide for playing-out data frames in form of a slide show. | 05-17-2012 |
20120121015 | PROCESSING MULTIVIEW VIDEO - Decoding a multiview video signal comprises: receiving a bitstream comprising encodings of multiple views of the multiview video signal, each view comprising multiple pictures segmented into multiple segments; and obtaining a predictor for illumination compensation of a first segment with respect to a reference picture using an offset value for illumination compensation of at least one neighboring segment adjacent to the first segment according whether the reference picture associated with the first segment is the same as a reference picture associated with the neighboring segment. | 05-17-2012 |
20120121016 | Predictive encoding and data decoding control - Decoding control apparatus for decoding predictive encoded data. A picture detector determines the fewest possible pictures which must be decoded first before decoding a picture which are to be displayed after an edit point. A start-point finder for finds the start point for decoding the fewest possible pictures determined by said picture detector even though those fewest pictures are not to be displayed. A plurality of decoders decode the encoded data in picture units, on the basis of the start point. A picture obtained by the decoders is selected on the basis of the edit point and output. | 05-17-2012 |
20120128067 | Apparatus and Method of Constrained Partition Size for High Efficiency Video Coding - An apparatus and method for video coding and decoding with constrained PU partition are disclosed. In the High Efficient Video Coding (HEVC) system, rate-distortion function or other performance criterion usually is evaluated for various CU partition and PU partition during the encoding process in order to select a configuration with best possible performance. The PU design in the current HEVC development results in some redundancy that causes rate-distortion function or other performance criterion repeatedly evaluated for same PU configuration. Accordingly, constrained PU partition is developed to eliminate or reduce the redundancy in processing. Furthermore, necessary syntax to convey the information related to constrained PU partition between an encoder and a decoder is developed. Systems embodying the present invention has been shown to result in sizeable reduction in encoding and decoding time while the performance in terms of RD-rate remains approximately the same or slightly higher than a conventional HEVC system. | 05-24-2012 |
20120128068 | METHOD FOR DECODING A STREAM OF CODED DATA REPRESENTATIVE OF A SEQUENCE OF IMAGES AND METHOD FOR CODING A SEQUENCE OF IMAGES - A method for decoding a stream of coded data representative of a sequence of images is disclosed. The decoding method comprises | 05-24-2012 |
20120128069 | IMAGE PROCESSING APPARATUS AND METHOD - The present invention relates an image processing apparatus and method able to realize parallelized or pipelined intra prediction while also improving coding efficiency. | 05-24-2012 |
20120134414 | INTERPOLATION OF VIDEO COMPRESSION FRAMES - Coding techniques for a video image compression system involve improving an image quality of a sequence of two or more bi-directionally predicted intermediate frames, where each of the frames includes multiple pixels. One method involves determining a brightness value of at least one pixel of each bi-directionally predicted intermediate frame in the sequence as an equal average of brightness values of pixels in non-bidirectionally predicted frames bracketing the sequence of bi-directionally predicted intermediate frames. The brightness values of the pixels in at least one of the non-bidirectionally predicted frames is converted from a non-linear representation. | 05-31-2012 |
20120140821 | PIXEL ADAPTIVE INTRA SMOOTHING - The present invention relates to spatial prediction of pixels of a block, the block being a block of a digital image. In particular, for a block pixel at least one reference pixel(s) is selected and out of the selected reference pixel(s), the block pixel is predicted. In particular, the prediction of the block pixel is performed depending on the distance of this pixel to the reference pixel(s) from which it is to be predicted. | 06-07-2012 |
20120140822 | VIDEO CODING USING FUNCTION-BASED SCAN ORDER FOR TRANSFORM COEFFICIENTS - Video coding devices and methods use a function-based definition of scan order to scan transform coefficients associated with a block of residual video data. A video coder may define a scan order for coefficients based on a predefined function and one or more parameter values. A video encoder may use a function-based scan order to scan a two-dimensional array of coefficients to produce a one-dimensional array of coefficients for use in producing encoded video data. The video encoder may signal the parameters to a video decoder, or the video decoder may infer one or more of the parameters. The video decoder may use the function-based scan order to scan a one-dimensional array of coefficients to reproduce the two-dimensional array of coefficients for use in producing decoded video data. In each case, the scan order may vary according to the parameter values, which may include block size, orientation, and/or orientation strength. | 06-07-2012 |
20120140823 | METHOD AND APPARATUS FOR ENCODING VIDEO, AND METHOD AND APPARATUS FOR DECODING VIDEO - Disclosed are method and apparatus for encoding and decoding an image which divides a current picture into blocks with various sizes and varies a number of intra prediction modes according to the sizes of the divided blocks. | 06-07-2012 |
20120140824 | METHOD AND APPARATUS FOR ENCODING VIDEO, AND METHOD AND APPARATUS FOR DECODING VIDEO - Disclosed are a method and a apparatus for encoding a video, and a method and apparatus for decoding a video, in which neighboring pixels used to perform intra prediction on a current block to be encoded are filtered and intra prediction is performed by using the filtered neighboring pixels. | 06-07-2012 |
20120147955 | Mode Adaptive Intra Prediction Smoothing in Video Coding - A method for decoding an encoded video bit stream in a video decoder is provided that includes decoding an intra prediction mode for a block of pixels encoded in the video bit stream, determining, based on the intra prediction mode, whether or not a smoothing filter is to be applied to reference pixel values used for intra prediction of the block, applying a smoothing filter to the reference pixel values when a result of the determining is that a smoothing filter is to be applied, and performing intra prediction according to the intra prediction mode using the smoothed reference pixel values to generate a predicted block of pixels. | 06-14-2012 |
20120147956 | Method and Apparatus for Multi-Threaded Video Decoding - A method and an apparatus for performing multi-threaded video decoding are disclosed. The method takes use of a multi-threaded scheme to process an encoded picture stream on a picture by picture basis. In the method, multiple threads are used for performing video decoding at the same time, such as one thread for the operation of parsing input bits into syntax elements of one picture implemented by the first thread, another thread for the operation of decoding the parsed syntax elements of another picture into pixel values implemented by the second thread, and the other threads for the operations of the non-reference picture, such as bidirectional predictive picture, including parsing input bits into syntax elements and the subsequent operation of decoding the parsed syntax elements into pixel values. Therefore, the decoding speed is substantially increased, and the decoding efficiency is enhanced. | 06-14-2012 |
20120155537 | Moving Picture Decoding Device and Moving Picture Decoding Method - One embodiment provides a moving picture decoding device for decoding a compression-coded moving picture stream, including: an inter-view predicting module configured to perform inter-view prediction processing on processing subject blocks of each frame to be decoded; a load detector configured to detect a magnitude of an apparatus processing load including a processing load for decoding; a judging module configured to judge whether the magnitude of the apparatus processing load detected by the load detector is small; and a controller configured to control the inter-view predicting module so as to cause simplification of the inter-view prediction processing if the judging module judges that the magnitude of the apparatus processing load is not small. | 06-21-2012 |
20120155538 | METHODS AND DEVICES FOR CREATING, DECODING AND TRANSCODING AN ENCODED VIDEO DATA STREAM - An image block is encoded by an inter-layer prediction into a first encoded image block and also encoded into a second encoded image block based on an encoding mode that excludes inter-layer prediction. The encoded first and second image blocks are decoded into reconstructed first and second image blocks, respectively. The first encoded image block is inserted into the encoded video stream. When encoding image blocks by an encoding mode that references the reconstructed first image block, the reference to the reconstructed second image block is changed. The image block encoded in this way is inserted into the encoded video data stream to achieve both a high compression rate with high image quality and low complexity in transcoding that can be used with different end devices by a scalable encoded video data stream, such as a video-on-demand service. | 06-21-2012 |
20120155539 | VIDEO FRAME ENCODING AND DECODING - A video frame arithmetical context adaptive encoding and decoding scheme is presented which is based on the finding, that, for sake of a better definition of neighborhood between blocks of picture samples, i.e. the neighboring block which the syntax element to be coded or decoded relates to and the current block based on the attribute of which the assignment of a context model is conducted, and when the neighboring block lies beyond the borders or circumference of the current macroblock containing the current block, it is important to make the determination of the macroblock containing the neighboring block dependent upon as to whether the current macroblock pair region containing the current block is of a first or a second distribution type, i.e., frame or field coded. | 06-21-2012 |
20120163451 | Method for Coding Videos Using Dictionaries - A video encoded as a bit stream is decoded by maintaining a set of dictionaries generated from decoded prediction residual signals, wherein elements of the set of dictionaries have associated indices. A current macroblock is entropy decoded and inverse quantized to produce decoded coefficients. For the current macroblock, a particular dictionary of the set of dictionaries is selected according to a prediction mode signaled in the bit stream, and particular elements of the particular dictionary are selected according to a copy mode signal in the bit stream and the associated index. The particular elements is scaled and combined, using the decoded coefficients, to reconstruct a current decoded macroblock prediction residual signal. Then, the current decoded macroblock prediction residual signal is combined with previously decoded macroblocks to generate an output macroblock of a reconstructed video, wherein the steps are performed in a decoder. | 06-28-2012 |
20120163452 | METHOD AND SYSTEM FOR SELECTIVELY BREAKING PREDICTION IN VIDEO CODING - Described are techniques in video coding and/or decoding that allow for selectively breaking prediction and/or in loop filtering across segment boundaries between different segments of a video picture. A high layer syntax element, such as a parameter set or a slice header, may contain one or more indications signalling to an encoder and/or decoder whether an associated prediction or loop filtering tool may be applied across the segment boundary. In response to such one or more indications, the encoder and/or decoder may then control the prediction or loop filtering tool accordingly. | 06-28-2012 |
20120163453 | METHOD AND SYSTEM FOR PICTURE SEGMENTATION USING COLUMNS - Described is picture segmentation through columns and slices in video encoding and decoding. A video picture is divided into a plurality of columns, each column covering only a part of the video picture in a horizontal dimension. All coded tree blocks (“CTBs”) belonging to a slice may belong to one or more columns. The columns may be used to break the same or different prediction or in-loop filtering mechanisms of the video coding, and the CTB scan order used for encoding and/or decoding may be local to a column. Column widths may be indicated in a parameter set and/or may be adjusted at the slice level. At the decoder, column width may be parsed from the bitstream, and slice decoding may occur in one or more columns. | 06-28-2012 |
20120163454 | FIELD/FRAME ADAPTIVE DECODING WITH FIELD/FRAME INDEX - A moving picture coding method for coding a picture with switching between frame coding and field coding adaptively on a block-by-block basis includes: determining the maximum number of reference indices for field coding for specifying fields which are to be referred to at the time of field coding, using the maximum number of reference indices for frame coding for specifying frames which are to be referred to at the time of frame coding; and assigning to fields the reference indices for field coding for specifying fields which are to be referred to at the time of field coding, within a range of the determined maximum number thereof, using the reference indices for frame coding for specifying frames which are to be referred to at the time of frame coding. | 06-28-2012 |
20120170649 | VIDEO CODING USING MAPPED TRANSFORMS AND SCANNING MODES - A video encoder may transform residual data by using a transform selected from a group of transforms. The transform is applied to the residual data to create a two-dimensional array of transform coefficients. A scanning mode is selected to scan the transform coefficients in the two-dimensional array into a one-dimensional array of transform coefficients. The combination of transform and scanning mode may be selected from a subset of combinations that is based on an intra-prediction mode. The scanning mode may also be selected based on the transform used to create the two-dimensional array. The transforms and/or scanning modes used may be signaled to a video decoder. | 07-05-2012 |
20120170650 | LOW COMPLEXITY INTERPOLATION FILTERING WITH ADAPTIVE TAP SIZE - During a prediction stage of video coding, a video coder may use relatively longer interpolation filters to generate predictive sub-pixel values using values of reference integer pixels of a reference block of video data positioned in parallel relative to a scanning order associated with the block and may use relatively shorter interpolation filters to generate predictive sub-pixel values using values of reference integer pixels of the block positioned perpendicular relative to the scanning order, wherein a longer interpolation filter generally refers to a filter with relatively more filter coefficients, or “taps,” and a shorter filter generally refers to a filter with relatively fewer taps. | 07-05-2012 |
20120170651 | Video Encoding Method and Decoding Method, Apparatuses Therefor, Programs Therefor, and Storage Media which Store the Programs - A video encoding method includes selecting a reference vector target frame and a reference frame from among already-encoded frames; encoding information for designating each frame; setting a reference vector for indicating an area in the reference vector target frame with respect to an encoding target area; encoding the reference vector; performing a corresponding area search by using image information of a reference vector target area, which belongs to the reference vector target frame and is indicated by the reference vector, and the reference frame; determining a reference area in the reference frame based on the search result; generating a predicted image by using image information of the reference frame, which corresponds to the reference area; and encoding differential information between image information of the encoding target area and the predicted image. | 07-05-2012 |
20120170652 | METHODS AND APPARATUS FOR EFFICIENT VIDEO ENCODING AND DECODING OF INTRA PREDICTION MODE - Methods and apparatus are provided for efficient video encoding and decoding of intra prediction mode. An apparatus includes a video encoder for encoding picture data for at least a block in a picture by determining a spatial pattern for a decoded intra prediction mode residue used to reconstruct the picture at the video encoder. The decoded intra prediction mode residue is obtained by inverse quantizing and inverse transforming a transformed and quantized difference between an original version of the block and at least one reference block. The spatial pattern is used to determine an intra prediction mode for encoding the block. | 07-05-2012 |
20120177111 | EFFICIENT CLIPPING - A method for clipping pixel values of image and video data, and a method and an apparatus for encoding and decoding video data is provided. During the encoding and decoding process of video data, pixels are identified that are outside a certain range of allowable values. These out-of-scope pixels are corrected by replacing their original value with a replacement value within said range, i.e., by either the minimum or the maximum value of said range. In addition, pixels in the neighborhood of the out-of-scope pixels are corrected as well, even if their value is within the allowable range, in order to account for inter-pixel correlations. The correction of neighboring pixels may be performed by adding a correction value that is computed on the basis of the difference between the original value and the replacement value of the out-of-scope pixel. | 07-12-2012 |
20120177112 | Method and Apparatus of Improved Intra Prediction Mode Coding - A method and apparatus for improved intra chroma prediction mode coding are disclosed. Intra prediction exploits the spatial correlation within a picture or within a picture region. In practice, a picture is divided into blocks and the intra mode prediction is performed on a block basis. In newer coding systems, multiple intra coding modes such as Vertical mode, Horizontal mode, DC mode and Diagonal mode, have been used to improve the coding efficiency of intra coding. Furthermore, a Luma_mode has also been used in intra prediction of chroma component to further improve the performance in the High Efficiency Video Coding (HEVC) standard being developed. However, the mode selection information for intra prediction has to be conveyed to the decoder for proper operation. Spatial features in a picture often exist in both luma and chroma components. The intra luma prediction mode and intra chroma prediction mode will have high probability to be the same. Accordingly, an embodiment according to the present invention adaptively assigns variable length codes to a set of mode symbols associated with intra chroma prediction by assigning a shortest code to the Luma_mode. Luma_mode not only can be the best luma mode of the corresponding luma block but also can be selected from several corresponding luma modes. The maximum length of chroma prediction codes is decreased by one bit when Luma_mode is equal to one of frequent modes. The coding efficiency of arithmetic coding of chroma prediction codes is further improved by selecting the context upon neighboring blocks. | 07-12-2012 |
20120177113 | Method and Apparatus of Improved Intra Luma Prediction Mode Coding - A method and apparatus for improved intra prediction mode coding are disclosed. Intra prediction exploits the spatial correlation within a picture or within a picture region. In practice, a picture is divided into blocks and the intra mode prediction is performed on a block basis. In newer coding systems, multiple intra prediction modes such as Vertical mode, Horizontal mode, DC mode and Diagonal mode, have been used to improve the coding efficiency of intra coding. However, the mode selection information for intra prediction has to be conveyed to the decoder for proper operation. In High-Efficiency Video Coding (HEVC), a coding scheme for the intra luma prediction mode is being considered, where the intra prediction mode of a current block is compared with the minimum of two intra luma prediction modes corresponding to two neighboring blocks. If the intra prediction mode of the current block is the same as the minimum of the two neighboring intra luma prediction modes, a single bit is transmitted to indicate the case. Otherwise, information for the current intra prediction mode is transmitted in fixed-length codeword. While the coding scheme for the intra luma prediction mode being considered may not fully exploit the neighboring intra luma prediction modes, it is desirable to further improve the performance. Accordingly, an improved coding scheme for intra prediction mode is disclosed, where more than one intra prediction mode candidates are derived. | 07-12-2012 |
20120177114 | ADAPTIVELY PERFORMING SMOOTHING OPERATIONS - During a video coding process, a prediction block is generated for a CU. The CU has two or more prediction units. A computing device determines, based on sizes of one or more of the prediction units, whether to perform a smoothing operation on samples in a transition zone of the prediction block. The transition zone is located at a boundary between samples of the prediction block associated with different prediction units. If the computing device makes the determination to perform the smoothing operation, the smoothing operation is performed to smooth samples of the prediction block in the transition zone. | 07-12-2012 |
20120177115 | ENCODING AND DECODING A VIDEO IMAGE SEQUENCE BY IMAGE AREAS - The invention relates to a method for coding a sequence of video images comprising a cutting into zones of at least one current image of the sequence,
| 07-12-2012 |
20120177116 | Efficient Transform Unit Representation - In one embodiment, a method includes receiving a prediction unit (PU) for a coding unit (CU) of the video content. The method analyzes the prediction unit to determine a size of prediction unit. A size of a transform unit is determined based on the size of the prediction unit based on a set of rules. The set of rules specify the size of the transform unit is linked to the size of prediction unit and not a size of the coding unit. The method then outputs the size of the transform unit for use in a transform operation. | 07-12-2012 |
20120177117 | Encoding Apparatus, Encoding Method, and Program of Same - An encoding apparatus for encoding progressive image data and interlace image data corresponding to this progressive image data, having a first encoding unit configured to encode picture data composing the interlace image data to generate first encoded data and decoding and recomposing the first encoded data to generate recomposed image data, an up sample processing unit configured to up sample the generated recomposed image data to generate image data having the same resolution as that of the progressive image data, and a second encoding unit configured to encode the picture data composing the progressive image data to generate second encoded data using the generated image data as predictive image data. | 07-12-2012 |
20120183055 | Temporal Prediction Structure Aware Temporal Filter - Disclosed are a system, method, apparatus, and computer readable media containing instructions for pre-filtering one or more pictures of a prediction structure. In an exemplary embodiment, a system includes an input for receiving the one or more pictures and a pre-filter, operatively coupled to the input and receiving the one or more pictures. The pre-filter can include a prediction position determining module for determining a position of at least one picture in the prediction structure, a context memory for storing determined position information, and a filter module for selecting a filter context based on the determined position and using the selected filter context to filter the at least one picture. | 07-19-2012 |
20120183056 | METHOD AND DEVICE FOR IMPROVED MULTI-LAYER DATA COMPRESSION - An encoder and method for encoding data in a scalable data compression format are described. In particular, process for encoding spatially scalable video are described in which the base layer uses downscaled residuals from a full-resolution encoding of the video in its motion estimation process. The downscaled residuals may also be used in the coding mode selection process at the base layer. | 07-19-2012 |
20120183057 | SYSTEM, APPARATUS, AND METHOD FOR ENCODING AND DECODING DEPTH IMAGE - An apparatus and method for encoding and decoding a depth image. An encoding apparatus may apply a block to a plurality of pixels forming a depth image, may divide the block into at least two areas based on a representative value, and may perform prediction encoding. Additionally, the encoding apparatus may encode prediction information associated with the block, may separate the at least two areas, and may select a prediction mode to perform prediction encoding. | 07-19-2012 |
20120183058 | MACRO-BLOCK ENCODING OF SKIPPED VIDEO FRAMES - A video system includes an encoder for generating a compressed bit stream in response to a received video signal. A transitional location is located in the bit stream that includes skip macro-block encoding, where the transitional location provides an indication where a linear relationship starts to exist between a length of the encoded bit stream and a length of a number of skipped macro-blocks. The skipped macro-blocks in the bit stream before the transitional location are encoded using a predetermined nonlinear relationship between the length of the encoded bit stream and the length of the number of skipped macro-blocks, whereas skipped macro-blocks in the bit stream are encoded using a linear relationship between the length of the encoded bit stream and the length of the number of skipped macro-blocks. | 07-19-2012 |
20120183059 | IMAGE CODING METHOD, IMAGE DECODING METHOD, MEMORY MANAGING METHOD, IMAGE CODING APPARATUS, IMAGE DECODING APPARATUS, MEMORY MANAGING APPARATUS, AND IMAGE CODING AND DECODING APPARATUS - With an image coding method which allows reduction of processing loads, when pictures included in a video signal are classified into layers so as to belong to their respective layers, a picture that belongs to the second layer that is located in a range restricted according to the first layer to which a current picture to be coded that is one of the pictures belongs, is referred to as a reference picture for the current picture, and the current picture is coded based on the reference picture. | 07-19-2012 |
20120183060 | TECHNIQUES FOR DESCRIBING TEMPORAL CODING STRUCTURE - The disclosed subject matter describes a new pattern description that can be part of an SEI message or a parameter set, and can be used to describe a temporal picture coding structure and associated bitrates and frame rates. The knowledge of the coding structure can benefit transraters, bitstream extractors, and digital video recorders. Decoders can utilize the coding structure information for example, to decode pictures in parallel, using multiple threads/cores. | 07-19-2012 |
20120183061 | Apparatus and Method for Decoding Picture Data - A decoding apparatus for decoding two encoded field data obtained by hierarchically encoding two field data associated with each of a plurality of picture data composing a moving picture image. The decoding apparatus comprising: a first decoding unit configured to decode one of the two encoded field data and obtain information associated with the two encoded field data; a conversion unit configured to interpolate first predicted image data generated by decoding by the first decoding unit according to the information and generate second predicted image data of a scanning position of the other encoded field data of the two encoded field data; and a second decoding unit configured to decode the other encoded field data of the two encoded field data based on the second predicted image data generated by the conversion unit. | 07-19-2012 |
20120183062 | METHOD OF EFFECTIVELY PREDICTING MULTI-LAYER BASED VIDEO FRAME, AND VIDEO CODING METHOD AND APPARATUS USING THE SAME - A method and apparatus are provided for effectively predicting a video frame that use all of the advantages of an intra mode and an intra BL mode in multi-layer structure based-video coding. The method includes reconstructing the intra block of a lower layer using the previously reconstructed first neighboring blocks of the intra block; subtracting the first neighboring blocks from previously stored the second neighboring blocks of an upper layer corresponding to the first neighboring blocks; creating a differential predicted block based on a predetermined intra prediction mode by performing intra prediction using virtual differential neighboring blocks that are created as a result of the subtraction; adding the differential predicted block and the reconstructed intra block; and subtracting a predicted block, which is created as a result of the addition, from a block of the upper layer corresponding to the intra block. | 07-19-2012 |
20120189051 | METHODS AND APPARATUS FOR DEBLOCKING FILTERING OF NON-LOCAL INTRA PREDICTION - Methods and apparatus are provided for deblocking filtering on non-local intra prediction. An apparatus includes an encoder for encoding picture data using non-local intra prediction. The encoder includes a deblocking filter configured for use with non-local intra prediction modes so as to deblock filter at least a portion of the picture data encoded using the non-local intra prediction. | 07-26-2012 |
20120189052 | SIGNALING QUANTIZATION PARAMETER CHANGES FOR CODED UNITS IN HIGH EFFICIENCY VIDEO CODING (HEVC) - In one example, this disclosure describes a method of decoding video data. The method comprises receiving a coding unit (CU) of encoded video data. The CU is partitioned into a set of block-sized coded units (CUs) according to a quadtree partitioning scheme, and decoding one or more syntax elements for the CU to indicate a change in a quantization parameter for the CU relative to a predicted quantization parameter for the CU only if the CU includes any non-zero transform coefficients. The one or more syntax elements are decoded from a position within the encoded video data after an indication that the CU will include at least some non-zero transform coefficients, and before the transform coefficients for the CU. | 07-26-2012 |
20120189053 | COMBINED REFERENCE PICTURE LIST CONSTRUCTION FOR VIDEO CODING - This disclosure relates to techniques for constructing a combined reference picture list, List C, based on List | 07-26-2012 |
20120189054 | Apparatus and Method for Coding Picture Data - A coding apparatus for hierarchically (layered data) coding two field data associated with each of a plurality of picture data composing a moving picture image. The coding apparatus comprising: a first coding unit configured to encode one of the two field data; a conversion unit configured to interpolate first predicted image data generated by the first coding unit encoding the one of the two field data and generate second predicted image data of a scanning position of the other field data of the two field data; and a second coding unit configured to encode the other field data of the two field data based on the second predicted image data generated by the conversion unit. | 07-26-2012 |
20120195376 | DISPLAY QUALITY IN A VARIABLE RESOLUTION VIDEO CODER/DECODER SYSTEM - In a video coder/decoder system using variable resolution adaptation, decoder techniques provide a mechanism to changing resolution of coded lower-resolution video to a higher resolution for rendering. Coded video data of a low resolution frame may be decoded. A motion estimation search may be performed between the decoded low resolution frame and a cache of previously-stored high resolution video frames. If the motion estimation search generates one or more matches, high resolution video data of the decoded frame may generated as a derivation of matching data from the cached video frames. | 08-02-2012 |
20120195377 | METHOD TO OPTIMIZE THE TRANSFORMS AND/OR PREDICTIONS IN A VIDEO CODEC - A joint optimization iterative algorithm determines optimized mode pairs. Each mode pair includes an intra-predictor and a transform pair that are iteratively modified to determine an optimized intra-predictor and an optimized transform that forms the optimized mode pair. A set of training videos and a set of quantization parameters (QPs) are used as the base data for determining the optimized mode pairs. Each video includes a plurality of pixel blocks, herein referred to as blocks. Block statistics associated with each mode pair are accumulated by separately encoding each block using each mode pair, and selecting the best mode pair for each block according to a measured characteristic of each encoding. The accumulated block statistics are used to modify the intra-predictor and the transform within each mode pair. | 08-02-2012 |
20120195378 | PIXEL LEVEL ADAPTIVE INTRA-SMOOTHING - This disclosure describes intra-smoothing techniques for intra-coding of video data. In one example, a video encoder is configured to determine a plurality of prediction samples for intra-predictive coding of a block to be coded in a video frame, calculate a local statistic for a first prediction sample of the prediction samples, select a filter from a plurality of filters based on the local statistic, and apply the selected filter to the first prediction sample. The video encoder may also be configured to calculate at least one local statistic for each prediction sample of the prediction samples, select a filter from a plurality of different filters based on the at least one local statistic for each prediction sample, and apply each selected filter to the corresponding prediction sample to generate the filtered version of the prediction sample. Embodiments further include video decoders and method of decoding encoded video signals. | 08-02-2012 |
20120195379 | METHOD AND APPARATUS FOR ENCODING IMAGES, AND METHOD AND APPARATUS FOR DECODING ENCODED IMAGES - Methods and apparatuses for encoding and decoding an image are provided. The method of encoding an image includes: replacing a transformation coefficient having a low frequency component to be predicted from among transformation coefficients of a transformation block with a predetermined value; generating an incomplete residual block by inversely transforming the transformation block including the replaced transformation coefficient; and predicting the transformation coefficient having the low frequency component by using values of the incomplete residual block. | 08-02-2012 |
20120195380 | METHOD AND APPARATUS FOR DECODING AND ENCODING VIDEO, AND METHOD AND APPARATUS FOR PREDICTING DIRECT CURRENT COEFFICIENT - Embodiments of the present invention provide a method and an apparatus for decoding and encoding a video, and a method and an apparatus for predicting a direct current coefficient. The video decoding method includes: receiving current frame image information sent by an encoding end, where the current frame image information includes prediction value information, and the prediction value information includes at least one intra-frame direct current DC prediction value; selecting a prediction value from the at least one intra-frame DC prediction value in the prediction value information as an intra-frame DC prediction value of the current image. Through the embodiments of the present invention, flexibility of encoding and decoding a video can be improved. | 08-02-2012 |
20120201298 | Implicit Transform Unit Representation - In one embodiment, a method includes receiving a size of a coding unit (CU) for a block of video content. Information associated with a prediction unit (PU) type for a prediction unit of the coding unit is also received. The method then applies the size of the coding unit and the information associated with the prediction unit type to a function to determine a size of at least one transform unit for the prediction unit. The size of the at least one transform unit is outputted for use in a transform operation. | 08-09-2012 |
20120201299 | IMAGING APPARATUS, RECEIVING APPARATUS, VIDEO TRANSMISSION SYSTEM, AND VIDEO TRANSMISSION METHOD - An imaging apparatus includes: an encoded-data generating section configured to generate encoded data including a first picture that can be decoded without referring to other pictures and one or more second pictures that can be decoded referring to other pictures; a transmission-data generating section configured to combine the first picture of the encoded data and the one or more second pictures of encoded data immediately preceding the encoded data to generate transmission data; and a radio communication section configured to intermittently transmit, in a unit of the transmission data, a plurality of the transmission data included in a video stream. | 08-09-2012 |
20120201300 | ENCODING/DECODING METHOD AND DEVICE FOR HIGH-RESOLUTION MOVING IMAGES - Disclosed is a high-resolution video encoding/decoding method and apparatus. The video encoding method includes: predicting a current block to generate a predicted block, subtracting the predicted block from the current block to generate a residual block, determining a transform and quantization type according to the block type of the current block; transforming and quantizing the residual block according to the determined transform and quantization type; and encoding the transformed and quantized residual block. According to the video encoding/decoding method and apparatus, not only the encoding efficiency can be improved because it enables an encoding using a high correlation between temporally/spatially adjacent pixels appearing in a video, but the compression efficiency can also be improved by reducing block distortion. | 08-09-2012 |
20120207214 | WEIGHTED PREDICTION PARAMETER ESTIMATION - Video coding systems incorporate techniques for deriving scalars W and/or O for use in weighted prediction. W represents a scaling factor and O represents an offset value. Given a frame of input video to be coded, a prediction match may be established one or more reference frames. The input frame may be parsed into a plurality of regions. Thereafter the scaling factor W and/or offset value O may be derived by developing a system of equations relating a predicted pixel to the pixel in the frame by the scaling factor W and/or offset value O. Equations within the system may be prioritized according to priority among regions, and scaling factor W and/or offset value O may be solved for. The scaling factor W and/or offset value O may be used during weighted prediction of the input frame. | 08-16-2012 |
20120207215 | VIDEO INFORMATION REPRODUCTION METHOD AND SYSTEM, AND VIDEO INFORMATION CONTENT - A plurality of I- or P-pictures for displaying video images with the same data as the last frame of the main data of the content are added as reproduction synchronization adjustment frames after the last frame of the main data; when reproduction leads a reference reproducing device, more synchronization adjustment frames are reproduced (ST | 08-16-2012 |
20120207216 | VIDEO AND IMAGE ENCODING/DECODING SYSTEM BASED ON SPATIAL DOMAIN PREDICTION - A video/image encoding/decoding system based on spatial prediction, in which at least one spatial prediciton mode is used to predict for encoding or decoding. At least one prediction mode acts on at least one pixel in the region to be encoded or decoded to generate the predictive values, using a prediction filter based on one or more reference pixels; furthermore, at least one of the spatial prediction modes has one or a combination of the following characteristics: the prediction filter which is content adaptively calculated through maximizing or minimizing the optimization objective in a specific region is used to generate the predictive values. The information of at least one spatial prediction filter of a specific spatial prediction mode is coded and written into the bit stream. The encoding/decoding system of this disclosure can better capture the dynamics of different video and image contents with improved precision of spatial prediction, and better coding performance is achieved. | 08-16-2012 |
20120213274 | FILTERING METHOD, MOVING PICTURE CODING APPARATUS, MOVING PICTURE DECODING APPARATUS, AND MOVING PICTURE CODING AND DECODING APPARATUS - A filtering method according to the present invention is for filtering a plurality of blocks included in an image, and comprises: determining whether each of the blocks is an IPCM block or not; filtering a non-IPCM block that is not an IPCM block among the blocks to generate filtered data; outputting the filtered data as pixel values of the non-IPCM block, and outputting pixel values of the unfiltered IPCM block as pixel values of the IPCM block. | 08-23-2012 |
20120213275 | SCALABLE VIDEO CODING AND DEVICES PERFORMING THE SCALABLE VIDEO CODING - A data processing system includes a scalable encoder including an encoder and a control module. The encoder includes at least two layer encoders and has an encoder configuration determined during initialization. The control module is configured to generate an encoder control code in accordance with transmission conditions of a communication channel, the encoder control code controlling operation of the at least two encoding layers. | 08-23-2012 |
20120213276 | PICTURE CODING METHOD AND PICTURE DECODING METHOD - A picture coding apparatus ( | 08-23-2012 |
20120213277 | MOVING PICTURE CODING APPARATUS, MOVING PICTURE DECODING APPARATUS, AND STREAM DATA - A signal separation unit ( | 08-23-2012 |
20120213278 | MOVING IMAGE CODING DEVICE, MOVING IMAGE DECODING DEVICE, MOVING IMAGE CODING/DECODING SYSTEM, MOVING IMAGE CODING METHOD AND MOVING IMAGE DECODING METHOD - A frequency transformation determination unit determines whether a plurality of adjacent transformation target regions with the partition boundary interposed therebetween are integrated or not. A transformation coefficient generation unit generates, by applying one frequency transformation, a transformation coefficient for the transformation target regions where the frequency transformation determination unit determined to integrate. | 08-23-2012 |
20120213279 | METHODS AND APPARATUS FOR DC INTRA PREDICTION MODE FOR VIDEO ENCODING AND DECODING - Methods and apparatus are provided for DC intra prediction mode for video encoding and decoding. An apparatus includes a video encoder for encoding image data for at least a portion of an input picture by deriving a direct current prediction value from a pre-determined constant and using the derived direct current prediction value for a direct current intra prediction mode. The portion is encoded using the direct current intra prediction mode. | 08-23-2012 |
20120219061 | VIDEO ENCODING APPARATUS, VIDEO DECODING APPARATUS, AND METHOD - Provided are a scalable video encoding apparatus, a scalable video decoding apparatus, and method. The scalable video encoding apparatus includes a first encoding unit to generate a base layer bitstream, which is to be used for generating a reconstructed image having a second resolution, by encoding an original image having a first resolution into an encoded image having the second resolution, and a second encoding unit to generate an enhancement layer bitstream by reconstructing the reconstructed image having the second resolution, which is received from the first encoding unit, to be a reconstructed image having the first resolution in response to an interpolation mode signal, and then to encode the original image having the first resolution by using the reconstructed image having the first resolution, where the enhancement layer bitstream contains additional information for generating a reconstructed image having the first resolution or a third resolution. | 08-30-2012 |
20120224630 | METHOD AND APPARATUS FOR PROVIDING PREDICTION MODE FINE GRANULARITY SCALABILITY - In an encoding process, video data are represented as a bitstream of a quantized base layer and at least two enhancement layers, with each picture in each layer identified by a start code. The base layer, plus a number of enhancement layers capable of being transmitted by the communication channel's bandwidth, are transmitted on the communication channel. | 09-06-2012 |
20120224631 | METHODS AND DEVICES FOR IMAGE ENCODING AND DECODING, AND CORRESPONDING COMPUTER PROGRAMS - A method and device relate to coding an image split up into partitions, which comprises the selection of at least one mode of coding and of its associated coding information items, from among items placed in competition, the prediction of the data of a current partition, the determination of residual data. Calculation of the value of a function representative of said residual data are performed, then the comparison of said calculated value with a value selected as value of competition index from among the associated values. If the values are equal, said signal transmitted comprises said residual data and said associated coding information items. If not, the residual data determined are modified so that the value of the function representative of the residual data is equal to the selected value of competition index, the signal transmitted comprising the modified residual data, excluding the selected value of competition index. | 09-06-2012 |
20120230400 | MEAN ABSOLUTE DIFFERENCE PREDICTION FOR VIDEO ENCODING RATE CONTROL - Mean absolute difference (MAD) prediction for video encoding may be provided. Upon receiving a video stream comprising a plurality of quality layers, a first quantization parameter (QP) may be selected for a first frame of the video stream according to a second QP associated with a second frame and a third QP associated with a third frame. The first frame may then be encoded according to the selected first QP. | 09-13-2012 |
20120230401 | BUFFER MANAGEMENT IN VIDEO CODECS - In one example, a video decoder is configured to determine, from data associated with an open decoding refresh (ODR) picture of video data, an identifier for a previous picture of the video data, determine whether the previous picture is currently stored in a reference picture memory, and decode only data for pictures of the video data having display order values that are greater than a display order value of the ODR picture, when the previous picture is not stored in the reference picture memory. In another example, a video encoder is configured to encode an open decoding refresh (ODR) picture, determine a previously coded picture having a display order value less than a display order value of the ODR picture and having a temporal identifier value equal to zero, and signal syntax data for the ODR picture representative of an identifier of the determined previously coded picture. | 09-13-2012 |
20120230402 | CONTEXT REDUCTION FOR LAST TRANSFORM POSITION CODING - A context reduced last transform (CRLT) coding technique which enhances parallel context processing, such as utilized in JCTVC-D262, to reduce complexity by reducing the number of context models using for coding the position of the last significant transform coefficient. Selected context models are removed and additional bins are shared which reduce the number of contexts required. In one benchmark test for YUV 4:2:0 video, the number of context models were reduced from 120 for the proposed entropy encoding of JCTVC-D262 test model HM 2.0, versus 82 context models required for CRLT coding. | 09-13-2012 |
20120230403 | Using Multiple Prediction Sets to Encode Extended Unified Directional Intra Mode Numbers for Robustness - An apparatus comprising a codec configured to predict an intra mode for a considered pixel block based on a plurality of coded intra modes for a plurality of adjacent pixel blocks to the considered pixel block, wherein the predicted intra mode and the coded intra modes correspond to a set of intra-frame modes that comprise a plurality of directional intra modes and at least two non-directional intra modes and that are assigned a plurality of corresponding group numbers and group index numbers, and wherein the intra mode is predicted based on the group numbers and group index numbers of the coded intra modes. | 09-13-2012 |
20120230404 | VIDEO BITSTREAM TRANSCODING METHOD AND APPARATUS - A video transcoder is disclosed. The video transcoder generally comprises a processor and a video digital signal processor. The processor may be formed on a first die. The video digital signal processor may be formed on a second die and coupled to the processor. The video digital signal processor may have (i) a first module configured to perform a first operation in decoding an input video stream in a first format and (ii) a second module configured to perform a second operation in coding an output video stream in a second format, wherein the first operation and the second operation are performed in parallel. | 09-13-2012 |
20120236938 | METHOD AND APPARATUS FOR ENCODING AND DECODING IMAGE BY USING LARGE TRANSFORMATION UNIT - Disclosed are an image encoding method and apparatus for encoding an image by grouping a plurality of adjacent prediction units into a transformation unit and transforming the plurality of adjacent prediction into a frequency domain, and an image decoding method and apparatus for decoding an image encoded by using the image encoding method and apparatus. | 09-20-2012 |
20120243606 | METHODS, APPARATUSES AND COMPUTER PROGRAMS FOR VIDEO CODING - There is disclosed apparatuses, methods and computer programs for video coding. One or more subsets of a set of operations is determined; an operation among the operations within said subset of operations is selected; and an indication on the subset and on the selected operation is provided at the encoding. The decoding comprises determining one or more subsets of a set of operations; receiving a subset indication indicative of a selected subset among said one or more subsets and for receiving an operation indication indicative of an operation selected among operations within said selected subset; and selecting an operation on the basis of said operation indication. | 09-27-2012 |
20120243607 | METHOD FOR IMAGE CODING AND DECODING - A method for coding an image divided into sub-regions is described. The coding method comprises the following steps:
| 09-27-2012 |
20120243608 | VIDEO CODING AND DECODING METHOD, AND CODING AND DECODING APPARATUS - The present invention relates to a video coding and decoding method, and coding and decoding apparatus. The coding method includes: generating a second order prediction flag for a coding block; when the coding block needs second order prediction, generating a second order prediction flag for at least one sub-block of the coding block, where the second order prediction flag of the sub-block is used to indicate whether second order prediction is performed on the sub-block; performing prediction according to the second order prediction flag of the coding block and the second order prediction flag of the at least one sub-block of the coding block to obtain a prediction image; and obtaining a prediction residual according to the prediction image, and coding the prediction residual. | 09-27-2012 |
20120250764 | PROCESS FOR CODING VIDEO DATA OF A SEQUENCE OF IMAGES - The process comprising splitting of an image into blocks, intra coding of a current block using spatial prediction based on a matching pursuit algorithm selecting, from a dictionary of atoms, the atom the most correlated with a causal neighborhood of the current block, is characterized in that it performs the following steps: determination of the two dimensional shift between the causal neighborhood and the selected atom, generation of at least, a new phased atom taking into account the values of the two dimensional spatial shift, use of this new atom for intra prediction, according to the matching pursuit algorithm, if better correlated than the selected one. Application to video data compression. | 10-04-2012 |
20120250765 | Method and Arrangement for Video Coding - Methods and arrangements in video encoding and decoding entities. The methods and arrangements relate to the joint encoding of reference information associated with encoded video. The method and arrangement in a decoding entity relate to obtaining ( | 10-04-2012 |
20120250766 | Method and Arrangement for Video Coding - Methods and arrangements in video encoding and decoding entities. The methods and arrangements involve determining ( | 10-04-2012 |
20120257674 | METHOD AND ARRANGEMENT FOR JOINTLY ENCODING A PLURALITY OF VIDEO STREAMS - A method for jointly encoding a plurality of video streams (IV | 10-11-2012 |
20120263231 | Temporal Motion Data Candidate Derivation in Video Coding - A method for derivation of a temporal motion data (TMD) candidate for a prediction unit (PU) in video encoding or video decoding is provided. The derived TMD candidate is for inclusion in an inter-prediction candidate list for the PU. The method includes determining a primary TMD position relative to a co-located PU in a co-located largest coding unit (LCU), wherein the co-located PU is a block in a reference picture having a same size, shape, and coordinates as the PU, and selecting at least some motion data of a secondary TMD position as the TMD candidate when the primary TMD position is in a bottom neighboring LCU or in a bottom right neighboring LCU of the co-located LCU, wherein the secondary TMD position is determined relative to the co-located PU. | 10-18-2012 |
20120263232 | METHODS FOR ENCODING AND DECODING IMAGES, CORRESPONDING ENCODING AND DECODING DEVICES AND COMPUTER PROGRAMS - A method is provided for encoding an image represented by a sequence of symbols. The method includes the following steps: defining subsequences within the sequence; and going through the subsequences applying the following sub-steps for a routine subsequence: determining an adjacent routine encoded group including two previously encoded subsequences, one of which belongs to an adjacent encoded group associated with a subsequence that is separate from the routine subsequence; initializing a routine probability of occurrence of a symbol, taking into account two known probabilities of occurrence of the symbol, relating to two previously encoded subsequences of the adjacent routine encoded group; the consecutive entropic encoding of the symbols, and updating the routine probability of occurrence; and storing the routine probability of occurrence after encoding the last symbol. | 10-18-2012 |
20120263233 | DATA PROCESSING CIRCUIT - The present invention provides a functional block that executes video coding and video decoding based on H. 264/AVC. The functional block includes two moving picture processing units, and a memory unit that stores therein data related to the results of processing of first plural macroblocks arranged within one row of one picture by the first moving picture processing unit. Data related to the results of processing of plural adjacent macroblocks, which are selected from the data stored in the memory unit, are transferred to the second moving picture processing unit. The second moving picture processing unit performs processing of one macroblock of second plural macroblocks arranged in the following row, using the transferred data. | 10-18-2012 |
20120275515 | VIDEO ENCODING DEVICE, VIDEO ENCODING METHOD, AND VIDEO ENCODING PROGRAM - A video encoding device includes a re-encoding picture type judgment unit which judges whether a picture is to be taken as a reference picture or not in a subsequent re-encoding process. A prediction error generation unit generates a prediction error signal so that only a picture to be a reference picture is formed when an encoded picture is formed. The video encoding device includes a quantization control unit for, when the re-encoding picture type judgment unit judges that the picture is to be taken as a reference picture in the subsequent re-encoding process, controlling so that a quantization step for quantization by a quantization unit is smaller than a case where the picture is judged to be taken as a non-reference picture. | 11-01-2012 |
20120275516 | IMAGE DECODING DEVICE, IMAGE CODING DEVICE, METHODS THEREOF, PROGRAMS THEREOF, INTEGRATED CIRCUITS THEREOF, AND TRANSCODING DEVICE - An image decoding device (C | 11-01-2012 |
20120275517 | DEPENDENCY PARAMETER SET FOR SCALABLE VIDEO CODING - System and methods for video decoding include receiving at least one Dependency Parameter Set (DPS); and determining at least one inter-layer dependency based on the received DPS. Systems and methods for video encoding include selecting a layering structure; encoding at least one Dependency Parameter Set (DPS) including a representation of the layering structure in a binary format; and including the encoded DPS in a bitstream or sending the encoded DPS out of band. | 11-01-2012 |
20120281755 | METHOD AND APPARATUS FOR ENCODING VIDEO, AND METHOD AND APPARATUS FOR DECODING VIDEO - Disclosed are method and apparatus for encoding and decoding an image which divides a current picture into blocks with various sizes and varies a number of intra prediction modes according to the sizes of the divided blocks. | 11-08-2012 |
20120287993 | MANAGEMENT OF SLICES | 11-15-2012 |
20120287994 | FILTERING BLOCKINESS ARTIFACTS FOR VIDEO CODING - In one example, an apparatus for coding video data includes a video coder configured to determine a first prediction mode for a first block of video data and a second prediction mode for a second block of video data, wherein the first block and the second block share a common edge, decode the first block using the first prediction mode and the second block using the second prediction mode, and determine whether to deblock the common edge between the first block and the second block based at least in part on whether at least one of the first prediction mode and the second prediction mode comprises short distance intra-prediction (SDIP). | 11-15-2012 |
20120287995 | Luma-Based Chroma Intra-Prediction for Video Coding - A method for luma-based chroma intra-prediction in a video encoder or a video decoder is provided that includes filtering reconstructed neighboring samples of a reconstructed down sampled luma block, computing parameters α and β of a linear model using the filtered, reconstructed neighboring samples of the reconstructed down sampled luma block and reconstructed neighboring samples of a corresponding chroma block, wherein the linear model is Pred | 11-15-2012 |
20120287996 | MOVING PICTURE PREDICTION METHOD, MOVING PICTURE CODING METHOD AND APPARATUS, AND MOVING PICTURE DECODING METHOD AND APPARATUS - An image decoding method is provided for generating a predictive pixel value of a current picture to be decoded, and decoding the current picture using the predictive pixel value. The method includes a first parameter calculation step of calculating a first parameter corresponding to a distance between the current picture and a first reference picture; a second parameter calculation step of calculating a second parameter corresponding to a distance between the first reference picture and a second reference picture; a judgment step of judging whether or not a value of a third parameter calculated using a value obtained by dividing the first parameter by the second parameter is a value which is represented by a plurality of bits; a predictive pixel value generation step of generating a predictive pixel value of the current picture; and a decoding step of decoding the current picture using the predictive pixel value. | 11-15-2012 |
20120287997 | MOVING PICTURE CODING METHOD, AND MOVING PICTURE DECODING METHOD - A moving picture coding apparatus for performing inter-picture predictive coding for pictures constituting a moving picture is provided with a coding unit for performing predictive error coding for image data; a decoding unit for performing predictive error decoding for an output from the coding unit; a reference picture memory for holding output data from the decoding unit; and a motion vector detection unit for detecting motion vectors on the basis of the decoded image data stored in the memory. When coding a B picture as a target picture, information indicating whether or not the target picture should be used as a reference picture when coding another picture is added as header information. Therefore, in a decoding apparatus for decoding a bit stream Bs outputted from the moving picture coding apparatus, management of a memory for holding the reference picture can be facilitated on the basis of the header information. | 11-15-2012 |
20120287998 | IMAGE PROCESSING APPARATUS AND METHOD - The present invention relates to an image processing apparatus and a method capable of improving the coding efficiency in intra prediction. | 11-15-2012 |
20120294357 | Methods, Apparatuses and Computer Programs for Video Coding - There is disclosed apparatuses, methods and computer programs for video coding. The filtering process to be applied to intra predicted sample values is selected and adapted based on the characteristics of the sample prediction process. According to some embodiments an angularity information and pixel values for filtering by a filter are received. The angularity information is used to adapt the filter. The adapting may comprise selecting a filter algorithm and/or filter coefficients. The selected pixels are then filtered by the adapted filter. | 11-22-2012 |
20120294358 | IMAGE PROCESSING DEVICE AND METHOD - An image processing device and method, enabling improvement in encoding efficiency. A plane approximation unit uses each of pixels values themselves of a block to be processed to obtain each of the parameters of a function representing a plane approximating the pixel values. A plane generating unit obtains pixel values on a plane represented by the supplied plane parameters. A prediction encoding unit predicts the values of the plane parameters, and obtains the difference between the prediction values and the actual plane parameter values, thereby reducing the data amount thereof. The entropy encoding unit further performs entropy encoding of the encoded plane parameters. The encoded plane parameters are supplied to the decoding side. | 11-22-2012 |
20120294359 | REGION-BASED PROCESSING OF PREDICTED PIXELS - A method for decoding a compressed video data sequence containing one or more coded pixel blocks. The compressed video sequence is buffered. Prediction information for each of the coded pixel blocks is reviewed. One or more groups of coded pixel blocks are formed based on the reviewed prediction information such that the coded pixel blocks within a given group have similar prediction dependencies and/or at least do not depend on a reconstructed pixel within a group of received pixel blocks to enable parallel decoding. The formed groups are scheduled for processing and subsequently decoded to produce a decoded video data sequence. | 11-22-2012 |
20120300837 | METHOD AND APPARATUS FOR USING SEGMENTATION-BASED CODING OF PREDICTION INFORMATION - Disclosed herein is a method for encoding a video signal having at least one frame with a plurality of blocks. The method includes assigning at least some of the plurality of blocks to a segment, determining at least one prediction element for the segment using a processor, applying the at least one prediction element to a first block and at least some of the other blocks in the segment and encoding the first block and the other blocks in the segment. | 11-29-2012 |
20120300838 | LOW RESOLUTION INTRA PREDICTION - A video decoder decodes video from a bit-stream including a low resolution predictor that predicts pixel values based upon both a low resolution reference image and an interpolated high resolution reference image at positions different from the low resolution reference image using low resolution motion data. A high resolution predictor predicts pixel values using a non-interpolated high resolution reference image at positions different from the low resolution reference image using the low resolution motion data, wherein the non-interpolated high resolution reference image and the interpolated high resolution reference image are co-sited. | 11-29-2012 |
20120300839 | Acceleration of Bypass Binary Symbol Processing in Video Coding - A method for encoding a video sequence in a video encoder to generate a compressed video bit stream is provided that includes binarizing a plurality of syntax elements, wherein each binarized syntax element comprises a string of one or more binary symbols (bins), wherein a bin is one selected from a context-coded bin and bypass bin, encoding the context-coded bins of the binarized syntax elements using binary arithmetic encoding, and adding the bypass bins of the binarized syntax elements to the compressed video bit stream with no encoding. | 11-29-2012 |
20120300840 | IMAGE ENCODING DEVICE, IMAGE DECODING DEVICE, IMAGE ENCODING METHOD, AND IMAGE DECODING METHOD - A disparity vector detection unit retrieves a signal having a high correlation with an encoding target block and acquire the signal having the high correlation and a disparity vector which is a disparity in a screen of the encoding target block by using a local decoded image of a block in the same image signal which was previously encoded, with respect to the encoding target block. A disparity prediction signal generation unit generates a prediction signal in accordance with the disparity vector. The disparity vector detection unit includes a DC calculation unit operative to predict a DC component of an image signal of the encoding target block from a neighboring decoded image, and a disparity reference DC calculation unit operative to calculate a DC component of a prediction signal represented by the disparity vector. | 11-29-2012 |
20120300841 | MULTI-COMPATIBLE LOW AND HIGH DYNAMIC RANGE AND HIGH BIT-DEPTH TEXTURE AND VIDEO ENCODING SYSTEM - A method of processing image data includes generating image data including luminance and chrominance data representing a selected object, separating the luminance and chrominance data, storing the separated luminance and chrominance data in corresponding separate spaces in memory, and separately compressing the stored luminance and chrominance data. | 11-29-2012 |
20120300842 | Decoding Apparatus, Decoding Method, and Program of Same - An encoding apparatus for encoding progressive image data and interlace image data corresponding to this progressive image data, having a first encoding unit configured to encode picture data composing the interlace image data to generate first encoded data and decoding and recomposing the first encoded data to generate recomposed image data, an up sample processing unit configured to up sample the generated recomposed image data to generate image data having the same resolution as that of the progressive image data, and a second encoding unit configured to encode the picture data composing the progressive image data to generate second encoded data using the generated image data as predictive image data. | 11-29-2012 |
20120300843 | BLOCK-BASED INTERLEAVING - At least one implementation interleaves blocks from a stereo-image pair and enables intra-coding of the interleaved image using corresponding blocks as references. One particular implementation accesses a first image that includes multiple blocks, one of which is a first-image block. A second image is accessed that includes multiple blocks, one of which is a second-image block that has overlapping content with the first-image block. The multiple blocks of the first and second images are interleaved on a block basis to form an interleaved image. At least a portion of the interleaved image is encoded by encoding the first-image block using the second-image block as a reference. Another implementation provides the encoded portion in signal. Yet another implementation accesses the encoded image and decodes the portion by using the second-image block as a reference. | 11-29-2012 |
20120307893 | FAST COMPUTING OF DISCRETE COSINE AND SINE TRANSFORMS OF TYPES VI AND VII - This disclosure presents techniques for implementing a fast algorithm for implementing odd-type DCTs and DSTs. The techniques include the computation of an odd-type transform on any real-valued sequence of data (e.g., residual values in a video coding process or a block of pixel values of an image coding process) by mapping the odd-type transform to a discrete Fourier transform (DFT). The techniques include a mapping between the real-valued data sequence to an intermediate sequence to be used as an input to a DFT. Using this intermediate sequence, an odd-type transform may be achieved by calculating a DFT of odd size. Fast algorithms for a DFT may be then be used, and as such, the odd-type transform may be calculated in a fast manner | 12-06-2012 |
20120307894 | INTRA PREDICTION MODE CODING WITH DIRECTIONAL PARTITIONS - A video coder can determine a most probable mode for a block of video data using non-square partitions based on the direction of the non-square partitions. When the direction of the non-square partitions is vertical, an intra prediction mode of a left-neighboring block can be selected as the most probable intra prediction mode, and when the direction of the non-square partitions is horizontal, an intra prediction mode of an above-neighboring block can be selected as the most probable intra prediction mode. | 12-06-2012 |
20120307895 | IMAGE-ENCODING APPARATUS AND METHOD, TRANSFORM-ENCODING APPARATUS AND METHOD, APPARATUS AND METHOD FOR GENERATING A TRANSFORM BASE, AND IMAGE-DECODING APPARATUS AND METHOD USED IN SAME - A video encoding apparatus includes an intra prediction error collector; a transform base generator; an intra predictor; and a transform encoder, the intra prediction error collector collecting prediction errors of blocks having an equal intra prediction mode from macroblocks in a regular unit, which are encoded prior to a current macroblock, the transform base generator generating transform bases for respective intra prediction modes based on the prediction errors collected by the intra prediction error collector. Accordingly, the intra prediction encoding performance can be significantly improved with adding no addition information by adaptively generating a transform base according to an image characteristic change and transform-encoding an intra prediction error. As a result, the compression efficiency of a video compression apparatus or the picture quality of a reconstructed image can be greatly improved. | 12-06-2012 |
20120307896 | MOVING PICTURE CODING METHOD, MOVING PICTURE DECODING METHOD, AND APPARATUSES OF THE SAME - A moving picture coding method includes partitioning a picture into blocks each of which includes pixels, selecting a scanning scheme from among plural scanning schemes, scanning the blocks according to the selected scanning scheme, and coding the blocks in an order in which the blocks are scanned. In the partitioning, the picture is partitioned into rows and columns of macroblocks each of which is partitioned into the blocks. The plural scanning schemes include a first scanning scheme for scanning the blocks in the macroblock per row of blocks. | 12-06-2012 |
20120307897 | VIDEO ENCODER, VIDEO DECODER, METHOD FOR VIDEO ENCODING AND METHOD FOR VIDEO DECODING, SEPARATELY FOR EACH COLOUR PLANE - High-fidelity video coding nowadays tends to adopt the RGB coding for directly reducing RGB inter-color redundancy without color space conversion. A known method uses a blockbased inter-colour compensation algorithm for removing inter-colour redundancy on RGB colour planes by defining the correlation between colour planes within each coding block as a linear model of slope and offset parameters, codes the base plane block and then predicts the other two colour blocks from the base plane block. However, for most coding blocks the texture within a component block varies quite much. A new method for improved video coding uses adaptive segmentation of the base colour component block, corresponding segmentation of the other colour component blocks and individual slope and offset parameters for predicting each segment. | 12-06-2012 |
20120314766 | ENHANCED INTRA-PREDICTION MODE SIGNALING FOR VIDEO CODING USING NEIGHBORING MODE - This disclosure describes techniques for intra-prediction mode signaling for video coding. In one example, a video coder is configured to determine, for a block of video data, a set of most probable intra-prediction modes such that the set of most probable intra-prediction modes has a size that is equal to a predetermined number that is greater than or equal to two. The video coder is also configured to code a value representative of an actual intra-prediction mode for the block based at least in part on the set of most probable intra-prediction modes and code the block using the actual intra-prediction mode. The video coder may further be configured to code the block using the actual intra-prediction mode, e.g., to encode or decode the block. Video encoders and video decoders may implement these techniques. | 12-13-2012 |
20120314767 | BORDER PIXEL PADDING FOR INTRA PREDICTION IN VIDEO CODING - A video coder performs a padding operation that processes a set of border pixels according to an order. The order starts at a bottom-left border pixel and proceeds through the border pixels sequentially to a top-right border pixel. When the padding operation processes an unavailable border pixel, the padding operation predicts a value of the unavailable border pixel based on a value of a border pixel previously processed by the padding operation. The video coder may generate an intra-predicted video block based on the border pixels. | 12-13-2012 |
20120320974 | Mode Dependent Intra Smoothing Filter Table Mapping Methods for Non-Square Prediction Units - An apparatus comprising a processor configured to determine whether to use an intra smoothing filter for a rectangular prediction unit (PU) based on a lookup table (LUT) used for square PUs, wherein a width of the rectangular PU is not equal to a height of the rectangular PU. | 12-20-2012 |
20120320975 | VIDEO ENCODING DEVICE AND ENCODING METHOD THEREOF, VIDEO DECODING DEVICE AND DECODING METHOD THEREOF, AND DIRECTIONAL INTRA-PREDICTION METHOD TO BE USED THERETO - The present disclosure provides a video encoding apparatus and encoding method thereof, video decoding apparatus and decoding method thereof, and directional intra-prediction method to be used therefor. The video encoding apparatus includes a main mode search unit for searching for main mode for a current block from among directional intra-prediction modes; a sub mode search unit for searching for sub modes formed by inclining indicated orientation of found main mode by main mode search unit by a predetermined offset in both clockwise and counterclockwise directions; a predicted block generator for generating predicted block of the current block from neighboring blocks of the current block based on found main mode by the main mode search unit and found sub modes by the sub mode search unit; a differentiator for calculating differential between the current block and the predicted block; and an encoder for encoding calculated differential by the differentiator. | 12-20-2012 |
20120320976 | VIDEO ENCODING DEVICE, VIDEO ENCODING METHOD, VIDEO ENCODING PROGRAM, VIDEO DECODING DEVICE, VIDEO DECODING METHOD, AND VIDEO DECODING PROGRAM - A video encoding device including a region division section for dividing a frame image constituting video data into a plurality of regions as encoding target regions, an encoding section for encoding an image of each region, an inverse transformation section and an addition section for generating reproduced image of the encoded image, a storage section for storing reproduced images, a prediction generation section for searching a region which is highly correlated to a reproduced image of a template region, which is adjacent to the region of the encoding target image in a predetermined positional relationship and is a part of the reproduced image, from the reproduced image, and determining a prediction signal based on the searched region and the above-mentioned positional relationship, and a subtraction section for generating a difference signal between the prediction signal and the encoding target image as a signal for encoding. | 12-20-2012 |
20120320977 | ENCODING/DECODING APPARATUS, IMAGING APPARATUS, AND METHODS FOR CONTROLLING THEREFOR - An encoding method and apparatus which include a coded picture that enables special playback to be easily performed while suppressing reduction in coding efficiency are provided. Coding is performed per a certain number of pictures, including pictures for special playback. When coded pictures for special playback using an interframe predictive coding scheme, referencing is limited to coded pictures encoded using an intraframe predictive coding scheme or coded pictures encoded using the interframe predictive coding scheme having the same reference limitation. | 12-20-2012 |
20120320978 | CODER OPTIMIZATION USING INDEPENDENT BITSTREAM PARTITIONS AND MIXED MODE ENTROPY CODING - A system, apparatus, and method for encoding a video signal having a plurality of frames including a current frame. The method includes identifying a first block within the current frame; determining at least one predictor token related to the first block; identifying a reference block within the plurality of frames; determining at least one prediction error token derived from a difference between the first block and the reference block; assigning the at least one predictor token to a first bitstream partition; assigning the at least one prediction error token to a second bitstream partition; and selecting a first encoding scheme for the first bitstream partition and a second encoding scheme for the second bitstream partition. | 12-20-2012 |
20120328009 | IMAGE DECODING METHOD, IMAGE CODING METHOD, IMAGE DECODING APPARATUS, IMAGE CODING APPARATUS, AND IMAGE CODING AND DECODING APPARATUS - An image decoding method of decoding, on a block-by-block basis, image data included in a coded stream includes: deriving candidates for an intra prediction mode to be used for intra prediction for a decoding target block, the number of the candidates constantly being a plural number; obtaining, from the coded stream, an index for identifying one of the derived candidates for the intra prediction mode; and determining, based on the obtained index, one of the derived candidates for the intra prediction mode as the intra prediction mode to be used for intra prediction for the decoding target block. | 12-27-2012 |
20120328010 | IMAGE DECODING METHOD, IMAGE CODING METHOD, IMAGE DECODING APPARATUS, IMAGE CODING APPARATUS, AND IMAGE CODING AND DECODING APPARATUS - The image decoding method includes: determining a context for use in a current block to be processed, from among a plurality of contexts; and performing arithmetic decoding on a bit sequence corresponding to the current block, using the determined context, wherein in the determining: the context is determined under a condition that control parameters of neighboring blocks of the current block are used, when the signal type is a first type, the neighboring blocks being a left block and an upper block of the current block; and the context is determined under a condition that the control parameter of the upper block is not used, when the signal type is a second type. | 12-27-2012 |
20120328011 | IMAGE DECODING METHOD, IMAGE CODING METHOD, IMAGE DECODING APPARATUS, IMAGE CODING APPARATUS, AND IMAGE CODING AND DECODING APPARATUS - The image decoding method includes: determining a context for use in a current block to be processed, from among a plurality of contexts; and performing arithmetic decoding on a bit sequence corresponding to the current block, using the determined context, wherein in the determining: the context is determined under a condition that control parameters of neighboring blocks of the current block are used, when the signal type is a first type, the neighboring blocks being a left block and an upper block of the current block; and the context is determined under a condition that the control parameter of the upper block is not used, when the signal type is a second type, and the second type is one of “ref_idx_l0” and “ref_idx_l1”. | 12-27-2012 |
20120328012 | IMAGE DECODING METHOD, IMAGE CODING METHOD, IMAGE DECODING APPARATUS, IMAGE CODING APPARATUS, AND IMAGE CODING AND DECODING APPARATUS - The image decoding method includes: determining a context for use in a current block to be processed, from among a plurality of contexts; and performing arithmetic decoding on a bit sequence corresponding to the current block, using the determined context, wherein in the determining: the context is determined under a condition that control parameters of neighboring blocks of the current block are used, when the signal type is a first type, the neighboring blocks being a left block and an upper block of the current block; and to the context is determined under a condition that the control parameter of the upper block is not used, when the signal type is a second type, and the second type is “inter_pred_flag”. | 12-27-2012 |
20120328013 | Luma-Based Chroma Intra-Prediction for Video Coding - A method for luma-based chroma intra-prediction in a video encoder or a video decoder is provided that includes down sampling a first reconstructed luma block of a largest coding unit (LCU), computing parameters α and β of a linear model using immediate top neighboring reconstructed luma samples and left neighboring reconstructed luma samples of the first reconstructed luma block and reconstructed neighboring chroma samples of a chroma block corresponding to the first reconstructed luma block, wherein the linear model is Pred | 12-27-2012 |
20120328014 | VIDEO CODING DEVICE, VIDEO CODING METHOD THEREOF, VIDEO DECODING DEVICE, AND VIDEO DECODING METHOD THEREOF - The present disclosure provides a video encoding apparatus and method and a video decoding apparatus and method. The video encoding apparatus, includes: a block mode determiner for determining a block mode of a current block; an NCI block intra encoder responsive if the block mode of the current block determined by the block mode determiner is an intra mode and neighboring blocks of the current block include an NCI block, for encoding the NCI block through an intra prediction of the NCI block; and a current block intra encoder responsive if the block mode of the current block determined by the block mode determiner is the intra mode and the neighboring blocks of the current block include the NCI block, for encoding the current block through an intra prediction of the current block. | 12-27-2012 |
20130003827 | CONTEXT INITIALIZATION BASED ON DECODER PICTURE BUFFER - Technique for initialization of encoders and decoders. In some cases, the decoder receives a slice and identifies if the slice is either a forward predicted B-slice or a backward predicted B-slice, and not both a forward and backward predicted B-slice, and based upon this identification initializes, using a P-slice technique, a context associated with the slice. | 01-03-2013 |
20130003828 | Method for Selecting Transform Types From Mapping Table for Prediction Modes - A method codes pictures in a bitstream, wherein the bitstream includes coded pictures to obtain data for associated TUs and data for generating a transform tree, and a partitioning of coding units (CUs) into Prediction Units (PUs), and data for obtaining prediction modes or directions associated with each PU. One or more mapping tables are defined, wherein each row of each table has an associated index and a first set of transform types to be used for applying an inverse transformation to the data in TU. The first set of transform types is selected according to an index, and then a second set of transform types is applied as the inverse transformation to the data, wherein the second set of transform types is determined according to the first set of transform types and a transform-toggle flag (ttf) to obtain a reconstructed prediction residual. | 01-03-2013 |
20130003829 | SYSTEM FOR INITIALIZING AN ARITHMETIC CODER - Decoding an entropy slice using a context based adaptively binary arithmetic coding, based upon a pair of variables n and m, corresponding to a probability state index and the value of the most probable symbol. | 01-03-2013 |
20130003830 | CONTEXT INITIALIZATION BASED ON DECODER PICTURE BUFFER - Technique for initialization of encoders and decoders. In some cases, the decoder receives a slice and identifies if the slice is either a forward predicted B-slice or a backward predicted B-slice, and not both a forward and backward predicted B-slice, and based upon this identification initializes, using a P-slice technique, a context associated with the slice. | 01-03-2013 |
20130003831 | RECEIVING APPARATUS, RECEIVING METHOD, AND PROGRAM - A receiving apparatus includes a receiving unit, a buffer, an I picture detection unit, and a decoding control unit. The receiving unit is configured to receive a digital broadcasting signal including AV streams of a plurality of channels. The buffer is configured to store video stream signals acquired from the received digital broadcasting signal. The I picture detection unit is configured to detect I pictures contained in the stored video stream signals. The decoding control unit is configured to control decoding of the video stream signals in such a manner as to be successively performed in an order of time positions from the video stream signal containing the I picture located in a front position as a relative time position among the I pictures detected for the respective channels. | 01-03-2013 |
20130003832 | Simplified Bilateral Intra Smoothing Filter - A method comprising receiving a plurality of reference pixels, computing a plurality of filter coefficients based on differences between a reference pixel and neighboring reference pixels in the plurality of reference pixels, and combining the filter coefficients with the reference pixel and the neighboring reference pixels to generate a filtered value, wherein the filtered value is used for intra prediction. | 01-03-2013 |
20130003833 | Scalable Video Coding Techniques - The disclosed subject matter provides techniques for inter-layer prediction using difference mode or pixel mode. In difference mode, inter-layer prediction is used to predict at least one sample of an enhancement layer from at least one (upsampled) sample of a reconstructed base layer picture. In pixel mode, no reconstructed base layer samples are used for reconstruction of the enhancement layer sample, A flag that can be part of a coding unit header in the enhancement layer can be used to distinguish between pixel mode and difference mode. | 01-03-2013 |
20130003834 | DERIVATION OF THE POSITION IN SCAN ORDER OF THE LAST SIGNIFICANT TRANSFORM COEFFICIENT IN VIDEO CODING - A video decoder converts a block-based LSC indicator into a scan-based LSC indicator. The block-based LSC indicator indicates coordinates of a last significant coefficient of a block of transform coefficients according to a scanning order. The scan-based LSC indicator indicates an ordinal position of the LSC according to the scanning order. The video decoder may decode, based on the scan-based LSC indicator, a significance map for the block. | 01-03-2013 |
20130003835 | CODING OF LAST SIGNIFICANT TRANSFORM COEFFICIENT - A video encoder determines that the last significant coefficient (LSC) of a transform coefficient block occurs at a given ordinal position according to a coding scanning order. The video encoder generates a coordinate indicator that specifies the coordinates of a given transform coefficient in the transform coefficient block. The given transform coefficient occurs at the same ordinal position according to an assumed scanning order. A video decoder receives the coordinate indicator and converts the coordinate indicator into a scan-based LSC indicator. The scan-based LSC indicator indicates the ordinal position of the LSC. | 01-03-2013 |
20130003836 | IMAGE DECODING METHOD, IMAGE CODING METHOD, IMAGE DECODING APPARATUS, IMAGE CODING APPARATUS, AND IMAGE CODING AND DECODING APPARATUS - The image decoding method includes: determining a context for use in a current block to be processed, from among a plurality of contexts; and performing arithmetic decoding on a bit sequence corresponding to the current block, using the determined context, wherein in the determining: the context is determined under a condition that control parameters of neighboring blocks of the current block are used, when the signal type is a first type, the neighboring blocks being a left block and an upper block of the current block; and the context is determined under a condition that the control parameter of the upper block is not used, when the signal type is a second type, and the second type is “intra_chroma_pred_mode”. | 01-03-2013 |
20130003837 | METHODS AND SYSTEM FOR USING A SCAN CODING PATTERN DURING INTRA CODING - A method for processing a block of transform coefficients during intra coding includes receiving an N×M block of transform coefficients, wherein N is a row width of the block and M is a column height of the block. A first scan coding pattern is determined from a set of scan coding patterns comprising a diagonal scan coding pattern, a horizontal scan coding pattern, and a vertical scan coding pattern. The method further includes partitioning the N×M block into a plurality of sub-blocks each comprising a plurality of the transform coefficients; and processing the plurality of sub-blocks, one at a time, in a coding order along the first scan coding pattern to generate a bit sequence. The processing further comprises, for the sub-blocks containing at least one non-zero transform coefficient, coding at least the non-zero transform coefficients in a transform coefficient sequence along a second scan coding pattern. | 01-03-2013 |
20130003838 | Lossless Coding and Associated Signaling Methods for Compound Video - An apparatus used in video encoding comprising a processor configured to receive a video frame, select at least one region in the video frame, bypass a quantization step in encoding of the at least one region, for a current block in the at least one region generate a prediction block, subtract the current block by the prediction block to generate a residual block, and selectively bypass a transform step in encoding of the residual block. | 01-03-2013 |
20130003839 | Fast Encoding Method for Lossless Coding - An apparatus comprising a processor configured to receive a current block of a video frame, and determine a coding mode for the current block based on only a bit rate cost function, wherein the coding mode is selected from a plurality of available coding modes, and wherein calculation of the bit rate cost function does not consider distortion of the current block. | 01-03-2013 |
20130003840 | Encoding of Prediction Residuals for Lossless Video Coding - An apparatus used in video encoding comprising a processor configured to generate a prediction block for a current block, compute a difference between the current block and the prediction block to generate a residual block, wherein the residual block comprises a plurality of residual values, and if the plurality of residual values include at least one non-zero residual value comprising at least one sign and at least one residual level, perform entropy encoding on the at least one sign; and perform entropy encoding on the at least one residual level, wherein one non-residual value comprises one sign and one residual level. | 01-03-2013 |
20130003841 | JOINT SUB-PIXEL INTERPOLATION FILTER FOR TEMPORAL PREDICTION - A method determines a plurality of interpolation filters for use in interpolating sub-pel values for a temporal prediction process of video content. The plurality of interpolation filters are designed based on sub-pel offsets for two reference blocks. The method determines a first sub-pel offset for a first reference block for the unit of video content and determines a second sub-pel offset for a second reference block for a unit of video content. A set of interpolation filters is determined to interpolate a set of sub-pel pixel values for use in the temporal prediction process for the unit of video content. The set of interpolation filters is designed for the first sub-pel offset and the second sub-pel offset and is used to interpolate a first sub-pel pixel value for the first reference block and a second sub-pel value for the second reference block. | 01-03-2013 |
20130010863 | MERGING ENCODED BITSTREAMS - At least one implementation provides a transcoder for merging two AVC (including, for example, the SVC annex) bitstreams. Various implementations provide advantages such as, for example, avoiding full decoding of at least one bitstream and/or avoiding motion compensation during the coding of an enhancement layer block. One particular implementation includes accessing a first and a second AVC encoding of a sequence of data. The second AVC encoding differs from the first AVC encoding in quality. The particular implementation further includes merging the first AVC encoding and the second AVC encoding into a third AVC encoding that uses the SVC extension of AVC. The merging is performed such that the first and second AVC encodings occupy different layers, and the first layer is a reference layer for the second layer. | 01-10-2013 |
20130010864 | IMAGE DATA COMPRESSION - The techniques directed to data compression are described. In some examples, the techniques may implement a bit budget-based scheme that indicates the available bit budget for a current image data block to achieve the target compression. The techniques may continuously update the bit budget after the compression of the current image data block to determine the bit budget for the next image data block. | 01-10-2013 |
20130010865 | REDUCED RESOLUTION PIXEL INTERPOLATION - An offset can be applied to intermediate values obtained while performing an interpolation filtering operation such that applying the offset reduces the bitdepth of the intermediate value. The intermediate value can be stored with the reduced bitdepth, and when retrieved, the offset can be added back such that future calculation can be performed using the intermediate value with the original bitdepth. | 01-10-2013 |
20130010866 | Method of decoding a digital video sequence and related apparatus - A method for rendering an MPEG sequence includes decoding a first picture in the MPEG sequence; reducing a data size of the decoded first picture by quantizing at least one component of the first picture, the quantized component selected from the luminance and chrominance components of the first picture; storing a reduced data size representation of the decoded first picture to a memory; reading a prediction block of the reduced data size representation of the decoded first picture; inverse quantizing the selected component of the prediction block of the reduced data size representation of the decoded first picture to restore the prediction block of the decoded first picture; and decoding a block of a second picture in the sequence according to the restored prediction block of the decoded first picture. | 01-10-2013 |
20130010867 | VIDEO COMPRESSION AND ENCODING METHOD - Disclosed herein is a method for decoding a video signal having at least one frame with a plurality of blocks including a current block, including generating, for at least a selected pixel in the current block, a predicted value for at least one pixel located in a row i and a column j of the current block using a processor and according to the following equation: X | 01-10-2013 |
20130010868 | VIDEO COMPRESSION AND ENCODING METHOD - Disclosed herein is a method for decoding a video signal having at least one frame with a plurality of blocks including a current block, including generating, for at least a selected pixel in the current block, a predicted value for at least one pixel located in a row i and a column j of the current block using a processor and according to the following equation: X | 01-10-2013 |
20130016777 | Pixel-Based Intra Prediction for Coding in HEVC - An apparatus comprising a processor configured to receive a video frame comprising a current block, wherein the current block comprises a plurality of original pixels, compute a plurality of reconstructed pixels based on the original pixels, and use an intra prediction mode to generate a set of prediction pixels based on a set of reconstructed pixels in the plurality of reconstructed pixels. | 01-17-2013 |
20130016778 | VIDEO COMPRESSION AND ENCODING METHOD - Disclosed herein is a method for decoding a video signal having at least one frame with a plurality of blocks including a current block, including generating, for at least a selected pixel in the current block, a predicted value for at least one pixel located in a row i and a column j of the current block using a processor and according to the following equation: X | 01-17-2013 |
20130016779 | VIDEO COMPRESSION AND ENCODING METHOD - Disclosed herein is a method for decoding a video signal having at least one frame with a plurality of blocks including a current block, including generating, for at least a selected pixel in the current block, a predicted value for at least one pixel located in a row i and a column j of the current block using a processor and according to the following equation: X | 01-17-2013 |
20130016780 | METHOD FOR DECODING MOVING PICTURE IN INTRA PREDICTION MODE - Provided is a method that de-multiplexes a bit stream to extract intra prediction mode information and residual signals, restores an intra prediction mode of a current prediction unit using the intra prediction information and intra prediction modes of prediction units adjacent to the current prediction unit, generates reference pixels using one or more available reference pixel if there exist unavailable reference pixels of the prediction unit, adaptively filters the reference pixels based on the restored intra prediction mode, generates a prediction block using the restored intra prediction mode and the reference pixels, decodes the residual signal to generating a residual block, and generates a reconstructed block using the prediction block and the residual block. Accordingly, additional bits resulted from increase of a number of intra prediction mode are effectively reduced. Also, an image compression ratio can be improved by generating a prediction block similar to an original block. | 01-17-2013 |
20130022111 | CODING MOTION DEPTH MAPS WITH DEPTH RANGE VARIATION - This disclosure describes techniques for coding 3D video block units. In one example, a video encoder is configured to determine a first real-world depth range for a first depth view component comprising a reference view component, determine a second real-world depth range for a second depth view component comprising a current view component, wherein the current view component is predicted relative to the reference view component, determine a predictive block for a portion of the current view component from the reference view component, adjust values of the predictive block based on a difference between the first real-world depth range and the second real-world depth range, and predict the portion of the current view based on the adjusted values of the predictive block. | 01-24-2013 |
20130022112 | FILTERING METHOD, MOVING PICTURE DECODING METHOD, MOVING PICTURE CODING METHOD, MOVING PICTURE DECODING APPARATUS, MOVING PICTURE CODING APPARATUS, AND MOVING PICTURE CODING AND DECODING APPARATUS - A filtering method is for performing deblocking filtering on the boundary between an IPCM block and a non-IPCM block adjacent to each other in an image and including: determining a first quantization parameter for the non-IPCM block; determining a second quantization parameter for the IPCM block, using the first quantization parameter; determining a filter strength for the boundary, using the first quantization parameter and the second quantization parameter; and performing the deblocking filtering on the boundary using the determined filter strength. | 01-24-2013 |
20130022113 | SLICE HEADER PREDICTION FOR DEPTH MAPS IN THREE-DIMENSIONAL VIDEO CODECS - In one example, a video coder is configured to code a first slice, wherein the first slice comprises one of a texture slice and a corresponding depth slice, wherein the first slice has a slice header comprising complete syntax elements representative of characteristics of the first slice. The video coder is further configured to determine common syntax elements for a second slice from the slice header of the first slice. The video coder is also configured to code the second slice after coding the first slice at least partially based on the determined common syntax elements, wherein the second slice comprises one of the texture slice and the depth slice that is not the first slice, wherein the second slice has a slice header comprising syntax elements representative of characteristics of the second slice, excluding values for syntax elements that are common to the first slice. | 01-24-2013 |
20130022114 | METHOD AND RELATED APPARATUSES FOR DECODING MULTIMEDIA DATA - A method for decoding compressed multimedia data is disclosed. At least one performance parameter corresponding to a system environment or a display requirement of the compressed multimedia data is first acquired. A rendering flow for the compressed multimedia data according to the at least one performance parameter is then determined dynamically, wherein the rendering flow comprises a specific arrangement of rendering procedures indicating the execution order of the rendering procedures. Then, the compressed multimedia data is decoded with the determined rendering flow so as to display the decoded data as an image data. | 01-24-2013 |
20130022115 | APPARATUS AND METHOD FOR ENCODING IMAGE - Provided is a moving picture coding apparatus for increasing a compression ratio of a moving picture signal while maintaining high image quality. To minimize the number of bits required for a residual block, quantized transform coefficients are adaptively divided into a plurality of subsets according to a size of a transform block, and non-zero quantized transform coefficients of each subset are scanned and encoded. Also, an intra prediction mode of the current block is determined using reference pixels obtained by filtering reference pixels of the current block. Accordingly, it is possible to minimize the amount of data required for the residual block of the current block. | 01-24-2013 |
20130028317 | INTRA-MODE SEARCH FOR VIDEO ENCODING - A search method for identifying an intra mode that can produce acceptable video-encoding quality for a pixel block while striking a proper balance between the quality and processor load. In a representative embodiment, the search method relies on a set of mode-selection rules for iteratively identifying candidate intra modes. Each identified candidate is evaluated based on a comparison of its sum of absolute differences (SAD) with the smallest SAD in the set of the previously identified candidates. The mode-selection rules use the comparison results as conditions that efficiently guide the search method toward an intra mode that is suitable for encoding the pixel block with acceptable video quality. On average, a representative embodiment of the search method disclosed herein is advantageously capable of finding a suitable intra mode in fewer iterations than a comparable prior-art search method. | 01-31-2013 |
20130028318 | MOVING IMAGE DECODER AND MOVING IMAGE DECODING METHOD - In one embodiment, there is provided a moving image decoder for decoding a compression-coded moving image stream. The decoder includes: a deblocking filter configured to perform deblocking filter processing on each of frames to be decoded; a load detector configured to detect a magnitude of internal processing loads occurring inside a video player, including a processing load for decoding; a determination module configured to determine whether to bypass the deblocking filter processing, depending on the magnitude of the internal processing loads. The deblocking filter is configured to bypass the deblocking filter processing, if the magnitude of the internal processing loads is bigger than a threshold value and a processing subject block of the frame is decoded using inter-view prediction. | 01-31-2013 |
20130028319 | MOVING PICTURE CODING METHOD, MOVING PICTURE DECODING METHOD, MOVING PICTURE CODING APPARATUS, MOVING PICTURE DECODING APPARATUS, AND MOVING PICTURE CODING AND DECODING APPARATUS - A moving picture coding method includes (i) transforming, for each of one or more second processing units included in the first processing unit, a moving picture signal in a spatial domain into a frequency domain coefficient and quantizing the frequency domain coefficient, and (ii) performing arithmetic coding on a luminance CBF flag indicating whether or not a quantized coefficient is included in the second processing unit in which transform and quantization are performed, wherein, in the arithmetic coding, a probability table for use in arithmetic coding is determined according to whether or not the size of the first processing unit is identical to the size of the second processing unit and whether or not the second processing unit has a predetermined maximum size. | 01-31-2013 |
20130028320 | Redundant Data Dispersal In Transmission Of Video Data Based On Frame Type - The transmitting end of a content distribution system selectively employs a redundancy mechanism to encode video data. In the event that a particular frame contains information upon which the decoding of multiple frames may depend, the transmitting end can apply a redundancy mechanism to redundantly distribute the data of the frame throughout a set of data segments, each of which is separately transmitted via the network to the receiving end. Otherwise, in the event that a particular frame to be transmitted does not contain substantial information upon which the decoding of multiple frames may depend, the loss of some or all of the data of the frame may not appreciably affect the presentation of the video content at the receiving end and thus the transmitting end can forgo application of the redundancy mechanism to such frames so as to avoid unnecessary processing and reduce the overall network bandwidth used. | 01-31-2013 |
20130028321 | APPARATUS AND METHOD FOR IMAGE PROCESSING - The present invention relates to apparatuses and methods for image processing allowing for minimization of image degradation in a screen as a whole and improvement in local image degradation. An adaptive loop filter ( | 01-31-2013 |
20130028322 | MOVING IMAGE PREDICTION ENCODER, MOVING IMAGE PREDICTION DECODER, MOVING IMAGE PREDICTION ENCODING METHOD, AND MOVING IMAGE PREDICTION DECODING METHOD - An object is to improve the quality of a reproduced picture and improve the efficiency of predicting a picture using the reproduced picture as a reference picture. For this object, a video prediction encoder | 01-31-2013 |
20130034155 | VIDEO-ENCODING METHOD AND VIDEO-ENCODING APPARATUS USING PREDICTION UNITS BASED ON ENCODING UNITS DETERMINED IN ACCORDANCE WITH A TREE STRUCTURE, AND VIDEO-DECODING METHOD AND VIDEO-DECODING APPARATUS USING PREDICTION UNITS BASED ON ENCODING UNITS DETERMINED IN ACCORDANCE WITH A TREE STRUCTURE - Provided are a method and apparatus for encoding a video and a method and apparatus for decoding a video. The encoding method includes: splitting a picture of the video into one or more maximum coding units; encoding the picture based on coding units according to depths which are obtained based on a partition type determined according to the depths of the coding units according to depths, determining coding units according to coded depths with respect to each of the coding units according to depths, and thus determining coding units having a tree structure; and outputting data that is encoded based on the partition type and the coding units having the tree structure, information about the coded depths and an encoding mode, and coding unit structure information indicating a size and a variable depth of a coding unit. | 02-07-2013 |
20130034156 | INTER-PREDICTION METHOD AND VIDEO ENCODING/DECODING METHOD USING THE INTER-PREDICTION METHOD - An inter-prediction method and a video encoding/decoding method using the inter-prediction method are disclosed. The video encoding method using inter-prediction includes: encoding a first picture that serves as a reference for random access; inter-prediction encoding a block included in a second picture, which is displayed before the first picture, by using a plurality of reference pictures; generating reference picture information representing whether a past picture, which is displayed before the second picture, is used as a reference picture for encoding the second picture; and transmitting the encoded first and second pictures and the reference picture information. | 02-07-2013 |
20130034157 | INHERITANCE IN SAMPLE ARRAY MULTITREE SUBDIVISION - A better compromise between encoding complexity and achievable rate distortion ratio, and/or to achieve a better rate distortion ratio is achieved by using multitree sub-divisioning not only in order to subdivide a continuous area, namely the sample array, into leaf regions, but using the intermediate regions also to share coding parameters among the corresponding collocated leaf blocks. By this measure, coding procedures performed in tiles—leaf regions—locally, may be associated with coding parameters individually without having to, however, explicitly transmit the whole coding parameters for each leaf region separately. Rather, similarities may effectively exploited by using the multitree subdivision. | 02-07-2013 |
20130034158 | APPARATUS FOR INTRA PREDICTING A BLOCK, APPARATUS FOR RECONSTRUCTING A BLOCK OF A PICTURE, APPARATUS FOR RECONSTRUCTING A BLOCK OF A PICTURE BY INTRA PREDICTION - An apparatus for intra predicting a block to be predicted of a picture from neighboring image samples sequentially extending along two rays starting at a common intersection point and pointing into different directions, the neighboring image samples including edge neighboring samples bordering the block to be predicted, includes a smoothing filter and a determiner. The smoothing filter is configured to one-dimensionally filter the neighboring image samples, which are sequentially arranged into a sequence by anti-parallelly traveling along a first one of the two rays and parallelly traveling along a second one of the two rays to obtain a filtered image sample sequence. The determiner is configured to determine a prediction value for a predetermined image sample of the block to be predicted by using the filtered image sample sequence. | 02-07-2013 |
20130034159 | DECODER, ENCODER, METHOD FOR DECODING AND ENCODING, DATA STREAM - A decoder for decoding a picture is described, having: an extractor adapted to extract a first subset of syntax elements from a received data stream and a second subset of syntax elements being disjoint from the first subset of syntax elements, wherein the second subset of syntax elements has filter indication information defining a first filter for a first region of at least two different regions of the picture and a second filter for a second region of the at least two different regions of the picture; a pre-decoder adapted to pre-decode the picture based on the first subset of syntax elements to produce a reconstructed version of the picture; and a filter stage adapted to apply the first filter to the first region of the reconstructed picture to obtain a first filtered version of the reconstructed version of the picture and to apply the second filter to the second region of the first filtered version of the reconstructed version of the picture to obtain a second filtered version of the reconstructed version of the picture. | 02-07-2013 |
20130039415 | METHOD AND APPARATUS FOR ENCODING/DECODING IMAGE USING VARIABLE-SIZE MACROBLOCKS - A video encoding apparatus includes a candidate block type configuration unit for configuring block type candidates for encoding an image by using variable sized macroblocks; a video encoder for encoding an input image for each block type candidate; and a block type determiner for determining a block type based on encoding costs by the block type candidate, and generating a bitstream including image data encoded by the determined block type and information for the determined block type. Determining the block type to match the image characteristics enables combinations of diverse modes such as a large block and macroblock size, a minimum subblock size, available divisional block type, prediction mode type within a macroblock, and so on to achieve more effective encoding and decoding of high resolution images. | 02-14-2013 |
20130039416 | IMAGE ENCODING APPARATUS, IMAGE ENCODING METHOD AND PROGRAM - Provided is an image encoding apparatus including a characteristic quantity generation unit that generates a characteristic quantity showing a correlation between pictures for each candidate of a reference picture, with a first viewpoint picture different in time direction from the first viewpoint picture and a second viewpoint picture different from the first viewpoint picture being set as the candidates of the reference picture, and a reference picture list generation unit that generates a reference picture list by selecting as many reference pictures for the first viewpoint picture as the reference pictures for the second viewpoint picture from the candidates of the reference pictures based on the characteristic quantity. | 02-14-2013 |
20130039417 | RESIDUAL TREE STRUCTURE OF TRANSFORM UNIT PARTITIONING - In one embodiment, a method includes receives a prediction unit (PU) for a coding unit (CU) of video content. The PU is partitionable into a plurality of PU partition types. The method determines a PU partition type for the PU and a residual tree structure based on the PU partition type for partitioning of the CU into transform units (TUs). The residual tree includes a binary partition of a node into two. A TU partition for the PU partition type is determined based on the residual tree structure and a desired level of partitioning in the residual tree structure. The method then uses the TU partition in a transform operation. | 02-14-2013 |
20130039418 | System and Method for Video and Audio Encoding on a Single Chip - An apparatus is disclosed for performing real time video/audio encoding on a single chip. Within the single chip, a video encoder generates encoded video data from uncompressed video data and an audio encoder generates encoded audio data from uncompressed audio data. A mux processor within the single chip generates an output stream of encoded data from the encoded video data and the encoded audio data. | 02-14-2013 |
20130039419 | Method for Accessing a Spatio-Temporal Part of a Compressed Video Sequence - The present invention concerns a processing method for accessing a spatio-temporal part of a compressed video sequence, as well as an associated device. | 02-14-2013 |
20130039420 | METHOD OF PROCESSING AN IMAGE - The invention relates to a method for processing an image divided into blocks of pixels comprising the steps of:
| 02-14-2013 |
20130044811 | Content-Based Adaptive Control of Intra-Prediction Modes in Video Encoding - A method for encoding a video sequence in a video encoder is provided that includes receiving a picture in the video sequence, selecting an intra-prediction set for the picture from a plurality of intra-prediction sets based on activity in a previous picture in the video sequence, wherein the intra-prediction set is a subset of intra-prediction block sizes and modes of the video encoder, and coding the picture using the set of intra-prediction block sizes and modes for intra-prediction of macroblocks in the picture. | 02-21-2013 |
20130044812 | ADAPTIVE CODING OF VIDEO BLOCK PREDICTION MODE - This disclosure describes techniques for coding of header information of video blocks. In particular, the techniques of this disclosure select one of a plurality of prediction modes for use in generating a prediction block of a video block of a coding unit, the plurality of prediction modes including unidirectional prediction modes and multi-directional prediction modes that combine at least two unidirectional prediction modes. An encoding device encodes the prediction mode of the current video block based on prediction modes of one or more previously encoded video blocks of the coding unit. Likewise, a decoding unit receives encoded video data of a video block of a coding unit and decodes the encoded video data to identify one of a plurality of prediction modes for use in generating a prediction block of the video block based on prediction modes of one or more previously decoded video blocks of the coding unit. | 02-21-2013 |
20130044813 | MOVING IMAGE PREDICTION ENCODING/DECODING SYSTEM - A moving image encoding/decoding system may include a video predictive encoding device, which may include: an encoding device which encodes each of a plurality of input pictures to generate compressed picture data including a random access picture, and encodes data about display order information of each picture; a restoration device which decodes the compressed picture data to restore a reproduced picture; a picture storage device which stores the reproduced picture as a reference picture; and a memory management device which controls the picture storage device. Following completion of an encoding process of generating the random access picture, the memory management device refreshes the picture storage device by setting every reference picture in the picture storage device, except for the random access picture, as unnecessary immediately before or immediately after encoding a picture with display order information larger than the display order information of the random access picture. | 02-21-2013 |
20130044814 | METHODS AND APPARATUS FOR ADAPTIVE INTERPOLATIVE INTRA BLOCK ENCODING AND DECODING - Methods and apparatus are provided for adaptive interpolative intra block encoding and decoding. An apparatus includes a video encoder for encoding at least an intra block in a picture by dividing the intra block into at least a first partition and a second partition, and generating predictions of pixels in the second partition by adaptively interpolating reconstructed pixels from the first partition. | 02-21-2013 |
20130051465 | REFERENCE DATA BUFFER FOR INTRA-PREDICTION OF DIGITAL VIDEO - Encoding or decoding digital video frames in intra-prediction mode by selecting column reference data locations for blocks adjacent a current block from a column reference data buffer storing column reference data samples for no more than two macro blocks of the frame. In some cases, the column reference data buffer may include a storage size for samples of a first column of data of blocks of one macro block of luminance samples. Encoding and decoding may also include selecting row reference data locations for blocks adjacent a current block from a row reference data buffer storing row reference data samples for at least one row of macro blocks of the frame. In some cases, the row reference data buffer may include storage for samples of a first row of data of fourteen successive blocks spanning two rows. The concept can be applied to various video processing components and standards. | 02-28-2013 |
20130051466 | METHOD FOR VIDEO CODING - A method for video coding is provided. The method includes retrieving a video frame, determining a maximal number of reference frames for the video frame, determining a search window size according to the maximal number of reference frames, and performing prediction encoding on the video frame according to the maximal number of reference frames and the search window size. | 02-28-2013 |
20130058404 | METHOD OF MOTION PREDICTION OF MULTIMEDIA VIDEO CODING - A method of motion prediction of multimedia video coding includes the steps of a) defining that each of macroblocks of enhancement layers has corresponding BL_Residual, EL_Residual, and EL_Residual | 03-07-2013 |
20130058405 | Video Coding - A method of performing a rate-distortion optimization process comprising, for each of a plurality of target image portions to be encoded in each of a plurality of frames, selecting a preferred one of a set of encoding modes by optimizing a function comprising an estimate of distortion for the target image portion and a measure of bit rate required to encode the target image portion, wherein the estimate of distortion is based on source coding distortion and an estimate of a distortion that would be experienced due to possible loss over the channel; encoding the target image portion into the encoded video stream using the selected encoding mode; and transmitting the encoded video stream over the channel. The rate-distortion optimization process for a current one of the frames is performed in dependence on feedback received from the receiving terminal based on an earlier one of the frames. | 03-07-2013 |
20130058406 | PREDICTIVE FRAME DROPPING METHOD USED IN WIRELESS VIDEO/AUDIO DATA TRANSMISSION - A predictive frame dropping method used in wireless video/audio data transmission using a video decoder or a video encoder under compressed domain instead of raw domain is provided. The method drops at least one consecutive P-frame directly in front of each I-frame sequentially in each group of pictures (GOP) for reducing the total amount of cache memory required for frame buffering and avoiding the memory from overflowing either before the data are being decompressed by the video decoder at the receiver side or after being compressed by the video encoder at the transmitter side. A controller for controlling the quantity of number of P-frames to be dropped is provided. The video decoder does not need any off-chip DDR memory. An SRAM can reside in either the video decoder or the video encoder for carrying out the predictive frame dropping method. | 03-07-2013 |
20130058407 | CODING OF TRANSFORM COEFFICIENTS FOR VIDEO CODING - This disclosure describes coding transform coefficients associated with a block of residual video data in a video coding process. Aspects of this disclosure include the selection of a scan order for both significance map coding and level coding, as well as the selection of contexts for entropy coding consistent with the selected scan order. This disclosure proposes a harmonization of the scan order to code both the significance map of the transform coefficients as well as to code the levels of the transform coefficient. It is proposed that the scan order for the significance map should be in the inverse direction (i.e., from the higher frequencies to the lower frequencies). This disclosure also proposes that transform coefficients be scanned in sub-sets as opposed to fixed sub-blocks. In particular, transform coefficients are scanned in a sub-set consisting of a number of consecutive coefficients according to the scan order. | 03-07-2013 |
20130058408 | IMAGE CODING METHOD, IMAGE DECODING METHOD, IMAGE CODING APPARATUS, IMAGE DECODING APPARATUS, AND IMAGE CODING AND DECODING APPARATUS - An image coding method includes: writing, into a sequence parameter set, buffer description defining information for defining a plurality of buffer descriptions; selecting one of the buffer descriptions for each processing unit that is a picture or a slice, and writing buffer description selecting information for specifying the selected buffer description, into a first header of the processing unit which is included in the coded bitstream; and coding the processing unit using the selected buffer description, and the buffer description defining information includes long-term information for identifying, among a plurality of reference pictures indicated in the buffer descriptions, a reference picture to be assigned as a long-term reference picture. | 03-07-2013 |
20130058409 | MOVING PICTURE CODING APPARATUS AND MOVING PICTURE DECODING APPARATUS - A moving picture coding apparatus includes: a coding unit which codes pictures with reference to decoded pictures of previously coded pictures to generate coded data of the pictures; a transmission unit which transmits the coded data to a moving picture decoding apparatus; and a control unit. When an acknowledgement signal indicating successful receiving of coded data of all of a predetermined number of consecutive pictures is received from a receiver apparatus, the control unit stores, as a key picture in a memory, a decoded picture of a current picture being coded when the acknowledgement signal is received. When a negative-acknowledgement signal indicating unsuccessful receiving of coded data of any of the consecutive pictures is received, the control unit causes the coding unit to code the current picture with reference to a key picture stored in the memory. | 03-07-2013 |
20130058410 | ENCODING DEVICE, DECODING DEVICE, AND DATA STRUCTURE - A video encoding device includes a side information determination section and a side information encoding section. The side information determination section sets a quantization parameter for each macroblock in such a manner that a difference between quantization parameters for each pair of macroblocks with successive encoding orders is equal to one of n difference values, and transforms the difference into one of n indices with respect to each pair. The side information encoding section generates a binary sequence having a length corresponding to the size of the absolute value of the index. The total of absolute values of the n indices is smaller than the total of absolute values of the n difference values. | 03-07-2013 |
20130058411 | METHODS AND APPARATUS FOR INTRA CODING A BLOCK HAVING PIXELS ASSIGNED TO GROUPS - Methods and apparatus are provided for intra coding a block having pixels assigned to groups. An apparatus includes a video encoder for encoding a block in a picture using intra prediction by dividing pixels within the block into at least a first group and a second group and encoding the pixels in the first group prior to encoding the pixels in the second group. A prediction for at least one of the pixels within the second group is obtained by evaluating the pixels within the first group and the second group. | 03-07-2013 |
20130064294 | CONTEXT ADAPTIVE ENTROPY CODING FOR NON-SQUARE BLOCKS IN VIDEO CODING - Disclosed are techniques for coding coefficients of a video block having a non-square shape defined by a width and a height, comprising coding one or more of x- and y-coordinates that indicate a position of a last non-zero coefficient within the block according to an associated scanning order, including coding each coordinate by determining one or more contexts used to code the coordinate based on one of the width and the height that corresponds to the coordinate, and coding the coordinate by performing a context adaptive entropy coding process based on the contexts. Also disclosed are techniques for coding information that identifies positions of non-zero coefficients within the block, including determining one or more contexts used to code the information based on one or more of the width and the height, and coding the information by performing a context adaptive entropy coding process based on the contexts. | 03-14-2013 |
20130064295 | MOTION DETECTION METHOD AND ASSOCIATED APPARATUS - A motion detection method is provided. The method includes steps of: capturing a current frame, generating a current luma frame according to the current frame, generating a foreground binary image according to the current luma frame, a background luma image and a sensitivity, and updating the background luma frame according to an updating frequency and the sensitivity. | 03-14-2013 |
20130064296 | METHODS AND SYSTEMS FOR IMAGE INTRA-PREDICTION MODE MANAGEMENT - Embodiments of the present invention relate to methods and systems for ordering, communicating and applying pixel intra-prediction modes. | 03-14-2013 |
20130070848 | LINE BUFFER REDUCTION FOR SHORT DISTANCE INTRA-PREDICTION - A video coder, such as a video encoder or a video decoder, identifies an entropy coding context in a set of one or more entropy coding contexts. The video coder identifies the entropy coding context without reference to a neighboring coding unit that is above a current coding unit in a current picture. The video coder then entropy codes a short distance intra-prediction (SDIP) syntax element of a coding unit (CU) using the identified entropy coding context. The SDIP syntax element at least partially defines a mode by which the CU is partitioned into a set of one or more transform units. | 03-21-2013 |
20130070849 | Method and Device for Reordering Video Information - A method and device that allow picture slices of a Video stream to be processed in an order different than the order they were received is disclosed. Information mapping the location of picture slices that are stored in the order they were received is stored to allow subsequent processing to access the picture slice in any order, including render order. | 03-21-2013 |
20130070850 | Method For Modeling Coding Information Of A Video Signal To Compress/Decompress The Information - A method and an apparatus of decoding a video signal are provided. The present invention includes the steps of parsing first coding information indicating whether a residual data of an image block in the enhanced layer is predicted from a corresponding block in the base layer, from the bitstream of the enhanced layer, and decoding the video signal based on the first coding information. And, the step of parsing includes the step of performing modeling of the first coding information based on second coding information indicating whether prediction information of the corresponding block in the base layer is used to decode the image block in the enhanced layer. Accordingly, the present invention raises efficiency of video signal processing by enabling a decoder to derive information on a prediction mode of a current block in a decoder instead of transferring the information to the decoder. | 03-21-2013 |
20130077677 | REFERENCE PICTURE LIST CONSTRUCTION FOR VIDEO CODING - Techniques are described related to constructing reference picture lists. The reference picture lists may be constructed from reference picture subsets of a reference picture set. In some examples, the reference picture subsets may be ordered in a particular manner to form the reference picture lists. | 03-28-2013 |
20130077678 | REFERENCE PICTURE LIST CONSTRUCTION FOR VIDEO CODING - Techniques are described related to constructing reference picture lists. The reference picture lists may be constructed from reference picture subsets of a reference picture set. In some examples, the techniques may repeatedly list reference pictures identified in the reference picture subsets until the number of entries in the reference picture list is equal to the maximum number of allowable entries in the reference picture list. | 03-28-2013 |
20130077679 | VIDEO CODING WITH SUBSETS OF A REFERENCE PICTURE SET - Techniques are described related to deriving a reference picture set. A reference picture set may identify reference pictures that can potentially be used to inter-predict a current picture and picture following the current picture in decoding order. In some examples, deriving the reference picture set may include constructing a plurality of reference picture subsets that together form the reference picture set. | 03-28-2013 |
20130077680 | DECODED PICTURE BUFFER MANAGEMENT - Techniques are described related to output and removal of decoded pictures from a decoded picture buffer (DPB). The example techniques may remove a decoded picture from the DPB prior to coding a current picture. For instance, the example techniques may remove the decoded picture if that decoded picture is not identified in the reference picture set of the current picture. | 03-28-2013 |
20130077681 | REFERENCE PICTURE SIGNALING AND DECODED PICTURE BUFFER MANAGEMENT - Techniques are described related to performing random access starting from a random access point picture that is not an instantaneous decoder refresh picture. Some techniques are also related to reducing the amount of information that is signaled for long-term reference pictures of a reference picture set. Additional techniques are also related to decoded picture buffer management, such as removing decoded pictures based on a temporal identification value. | 03-28-2013 |
20130077682 | VIDEO ENCODING METHOD AND VIDEO ENCODING APPARATUS AND VIDEO DECODING METHOD AND VIDEO DECODING APPARATUS, WHICH PERFORM DEBLOCKING FILTERING BASED ON TREE-STRUCTURE ENCODING UNITS - A method of encoding a video is provided, the method includes: determining a filtering boundary on which deblocking filtering is to be performed based on at least one data unit from among a plurality of coding units that are hierarchically configured according to depths indicating a number of times at least one maximum coding unit is spatially spilt, and a plurality of prediction units and a plurality of transformation units respectively for prediction and transformation of the plurality of coding units, determining filtering strength at the filtering boundary based on a prediction mode of a coding unit to which pixels adjacent to the filtering belong from among the plurality of coding units, and transformation coefficient values of the pixels adjacent to the filtering boundary, and performing deblocking filtering on the filtering boundary based on the determined filtering strength. | 03-28-2013 |
20130077683 | SYSTEM AND METHOD FOR INTRACODING AND DECODING VIDEO DATA - A video system for coding a stream of video data that includes a stream of video frames divides each video frame into a matrix of a plurality of subblocks, wherein each subblock includes a plurality of pixels. The video system operates in accordance with nine prediction modes. Each prediction mode determines a prediction mode according to which a present subblock is to be coded. One of the nine prediction modes is selected to encode the present subblock, wherein the selected prediction mode provides for a minimum error value in the present subblock. | 03-28-2013 |
20130083847 | MOVING IMAGE COMPRESSION ENCODING APPARATUS, METHOD, AND CONTROL PROGRAM - A moving image encoding apparatus decides a picture number for identifying a frame which is encoded by each encoding unit on the basis of a count value of a sync signal of an input moving image signal and a value corresponding to the number of a plurality of encoding units and notifies each encoding unit of the picture number. Each encoding unit obtains a moving image signal of the frame to be subjected to encoding among the input moving image signal, on the basis of the notified picture number and encodes the obtained moving image signal. Data encoded by a plurality of encoding units is multiplexed as a bit stream in accordance with the picture number and output. | 04-04-2013 |
20130083848 | SYSTEMS AND METHODS FOR DYNAMIC TRANSCODING OF INDEXED MEDIA FILE FORMATS - Methods and systems for transcoding from an input media stream to an output media stream, wherein the input media stream and the output media stream are in an indexed file format. The methods and systems are capable of generating an efficiently coded media file where the movie box is generated and sent before transcoding is complete, while maintaining acceptable and consistent quality throughout and minimizing the total size of the file. | 04-04-2013 |
20130083849 | IMAGE ENCODING METHOD AND DEVICE, AND DECODING METHOD AND DEVICE THEREFOR - A video encoding method and apparatus and a video decoding method and apparatus. In the video encoding method, a first predicted coding unit of a current coding unit that is to be encoded is produced, a second predicted coding unit is produced by changing a value of each pixel of the first predicted coding unit by using each pixel of the first predicted coding unit and at least one neighboring pixel of each pixel, and the difference between the current coding unit and the second predicted coding unit is encoded, thereby improving video prediction efficiency. | 04-04-2013 |
20130083850 | IMAGE ENCODING METHOD AND DEVICE, AND DECODING METHOD AND DEVICE THEREFOR - A video encoding method and apparatus and a video decoding method and apparatus. In the video encoding method, a first predicted coding unit of a current coding unit that is to be encoded is produced, a second predicted coding unit is produced by changing a value of each pixel of the first predicted coding unit by using each pixel of the first predicted coding unit and at least one neighboring pixel of each pixel, and the difference between the current coding unit and the second predicted coding unit is encoded, thereby improving video prediction efficiency. | 04-04-2013 |
20130089142 | Bandwidth-Friendly Representation Switching in Adaptive Streaming - Plural representations of a video stream may be provided. The plural representations may comprise a first chunk, a second chunk, and a transition chunk. The first chunk may comprise a first bitrate and the second chunk may comprise a second bitrate. The first and second chunks may be in decode order starting with an instantaneous decoding refresh (IDR) frame. The transition chunk may be in decode order starting with a non-IDR frame. Next, a request to transition from the first chunk to the second chunk may be received. Then a transition from the first chunk to the transition chunk responsive to the request may occur and the transition chunk may then be provided to another device. | 04-11-2013 |
20130089143 | Method, System, and Apparatus for Intra-Prediction in a Video Signal Processing - According to an aspect of the present disclosure, a video encoder selects a block of intermediate size from a set of block sizes for intra-prediction estimation for encoding a video signal. A set of neighbouring blocks with the intermediate size are tested for combining. If the set of neighbouring blocks are determined to be combinable, the video encoder selects a larger block size formed by the tested neighbouring blocks for encoding. On the other hand, if the set of neighbouring blocks are determined to be not combinable, the video encoder selects a smaller block size from the set of tested neighbouring blocks for prediction. According to another aspect of the present disclosure, the best mode for intra-prediction is determined by first intra-predicting a block with intermediate modes in a set of modes. Then the intra-predictions are performed for the neighbouring modes of at least one intermediate mode. | 04-11-2013 |
20130089144 | METHODS AND APPARATUSES OF ENCODING/DECODING INTRA PREDICTION MODE USING CANDIDATE INTRA PREDICTION MODES - A method and an apparatus of encoding/decoding intra prediction mode using a plurality of candidate intra prediction modes are disclosed. A method of decoding an intra prediction mode can comprise deriving three candidate intra prediction modes about a current block and deriving an intra prediction mode of the current block. Therefore, by predicting an intra prediction mode of the current block based on a plurality of candidate intra prediction modes, video encoding efficiency can be improved. | 04-11-2013 |
20130089145 | MOST PROBABLE TRANSFORM FOR INTRA PREDICTION CODING - A video coder can be configured to determine an intra-prediction mode for a block of video data, identify a most probable transform based on the intra-prediction mode determined for the block of video data, and code an indication of whether the most probable transform is a transform used to encode the block of video data. The most probable transform can be a non-square transform. | 04-11-2013 |
20130089146 | INFORMATION PROCESSING APPARATUS AND INFORMATION PROCESSING METHOD - To efficiently use anchor information. When anchor information to be used in a decoding process of a target block to be decoded does not satisfy an identity condition with anchor information used for a previous block, anchor information of an anchor block corresponding to the target block to be decoded is acquired from an anchor information storage unit. When the identity condition is satisfied, the anchor information of the previous block is continuously used. A motion vector is calculated using the acquired anchor information or the anchor information to be continuously used. Motion compensation is performed based on the calculated motion vector, and prediction image data is generated. Further, decoded image data is generated using the prediction image data | 04-11-2013 |
20130089147 | Video Transfer System - A synchronization signal generator of a decoder adds a predetermined value to a time value, and outputs a synchronization signal when the added time value coincides with a reproducing time value in a frame. | 04-11-2013 |
20130094580 | DETECTING AVAILABILITIES OF NEIGHBORING VIDEO UNITS FOR VIDEO CODING - As part of a video encoding or decoding operation on video data, a video coder performs a coding operation for a current video unit of the video data. As part of performing the coding operation for the current video unit, the video coder determines the availabilities of one or more video units that neighbor the current video unit. In order to determine the availability of a video unit that neighbors the current video unit, the video coder identifies, based on availabilities of video units that neighbor a parent video unit of the current video unit, an entry in a lookup table. The identified entry indicates the availability of the video unit that neighbors the current video unit. The video coder then performs a coding operation on the current video unit based on whether the video unit that neighbors the current video unit is available. | 04-18-2013 |
20130094581 | MOVING-PICTURE ENCODING APPARATUS AND MOVING-PICTURE DECODING APPARATUS - According to one embodiment, an encoding apparatus includes a prediction unit, a classifying unit, a first transformer, a second transformer, an order controller, and an entropy coder. The prediction unit obtains a predictive residual signal to be encoded, by using a mode selected from intra-prediction modes. The first transformer obtains first transformation coefficients by subjecting the signal to an orthogonal transformation by use of a first transformation basis if the selected mode is classified into a mode having a prediction direction. The first transformation basis is preset so that a coefficient density after the orthogonal transformation is higher than a coefficient density. | 04-18-2013 |
20130094582 | VIDEO CODING METHOD AND VIDEO DECODING METHOD - A video coding device codes video data, by performing motion compensation with sub-pel resolution by using an adaptive interpolation filter for calculating a pixel value of a sub pixel for interpolation between full pixels configuring an input image included in the video data. The video coding device includes a motion compensation unit setting a filter property for an adaptive interpolation filter on a predetermined process unit basis, determining, for each of sub-pel positions relative to a full pixel, a plurality of filter coefficients of the adaptive interpolation filter having the set filter property, and performing the motion compensation with sub-pel resolution, by applying the adaptive interpolation filter having the determined filter coefficients to the input image. The video coding device includes a subtraction unit generating a prediction error, by subtracting, from the input image, a prediction image generated in the motion compensation, and a coding unit coding the prediction error. | 04-18-2013 |
20130094583 | MOVING PICTURE CODING METHOD AND MOVING PICTURE DECODING METHOD - According to a picture coding method, a coded picture is stored, as a reference picture, into a storage unit; commands indicating correspondence between reference pictures and reference indices for designating reference pictures and coefficients used for generation of predictive images are generated; a reference picture being used when motion compensation is performed on a current block in a current picture to be coded is designated by a reference index; a predictive image is generated by performing linear prediction on a block being obtained by motion estimation within the designated reference picture, by use of a coefficient corresponding to the reference index; a coded image signal including a coded signal obtained by coding a prediction error being a difference between the current block in the current picture to be coded and the predictive image, the commands, the reference index and the coefficient is outputted. | 04-18-2013 |
20130094584 | ENCODING DEVICE, ENCODING METHOD, DECODING DEVICE, AND DECODING METHOD - The present technology relates to an encoding device and an encoding method, and a decoding device and a decoding method that are capable of reducing the calculation amount of orthogonal transform processing or inverse orthogonal transform processing. A DWT unit ( | 04-18-2013 |
20130101029 | MULTIMEDIA DATA ENCODING - A method of multimedia data encoding and a multimedia data encoding device is provided. The method includes accessing a frame associated with the multimedia data, the frame including a plurality of rows of blocks, each of the plurality of rows including a plurality of blocks. The method also includes reconstructing a first selected block of a first selected row, during a first time slot of a pipeline and a first selected block of a second selected row, during a second time slot of the pipeline. In addition, the method includes determining a first intra prediction mode optimal for intra prediction of the first selected block of the second selected row, during the first time slot of the pipeline, and a second intra prediction mode optimal for intra prediction of a second selected block of the first selected row during the second time slot, based a previously reconstructed block. | 04-25-2013 |
20130101030 | TRANSMISSION OF VIDEO DATA - In an embodiment, a method of transmitting video data includes at an encoder encoding the video data as a plurality of frames, including reference frames and intermediate frames, at least some of which are encoded based on multiple reference frames; at the encoder maintaining for each frame a current list of reference frames; and transmitting the plurality of frames, each frame being transmitted in association with a current list of reference frames for that frame. | 04-25-2013 |
20130101031 | DETERMINING QUANTIZATION PARAMETERS FOR DEBLOCKING FILTERING FOR VIDEO CODING - A video coder determines a deblocking quantization parameter (QP) value based on at least one of a first QP value and a second QP value. Subsequently, the video coder applies a deblocking filter that is based on the deblocking filter to an edge associated with a first video block. The edge occurs at a boundary between the first video block and a second video block. The first video block is associated with a current coding unit (CU) and the second video block is associated with a neighboring CU. The current CU is included in a first quantization group and the neighboring CU is included in a second quantization group. The first QP value is defined for the first quantization group. The second QP value is defined for the second quantization group. | 04-25-2013 |
20130101032 | FILTERING MODE FOR INTRA PREDICTION INFERRED FROM STATISTICS OF SURROUNDING BLOCKS - The present invention relates to intra prediction which may be performed during encoding and/or decoding of an image signal. In particular, the present invention relates to intra prediction of a current block, during which filtering is applied to the prediction signal and/or to signal used for the prediction. The filtering is applied in accordance with a decision based on characteristics of image signal included in block(s) spatially adjacent to the current block. | 04-25-2013 |
20130101033 | CODING NON-SYMMETRIC DISTRIBUTIONS OF DATA - This disclosure describes techniques for coding non-symmetric distributions of data and techniques for quantization matrix compression. The techniques for coding non-symmetric distributions of data may use a mapping that is configured to bias either positive data values or negative data values of a signed integer source towards shorter codewords of a variable length code that codes non-negative integers. This may allow signed integer data sources that have non-symmetric distributions of data to be coded in a more efficient manner. The quantization matrix compression techniques of this disclosure may use a predictor that is configured to generate prediction residuals for a quantization matrix that are skewed in favor of positive values. This may allow entropy coding techniques that favor data distributions which are skewed toward positive data values (e.g., the techniques for coding non-symmetric distributions described above) to be used to increase the coding efficiency of the quantization matrix. | 04-25-2013 |
20130101034 | IMAGE CODING METHOD, IMAGE DECODING METHOD, IMAGE CODING APPARATUS, IMAGE DECODING APPARATUS, AND IMAGE CODING AND DECODING APPARATUS - An image coding method includes: writing, into a coded bitstream, buffer description defining information for defining a buffer description; constructing a default reference list; reorder pictures included in the default reference list; writing, into the coded bitstream, reference list reordering information for indicating details of the reordering; and coding an image using the buffer description and a reference list resulting from the reordering, and in the reference list reordering information, among the pictures, a picture to be reordered is specified using an index which is used in other processing in the image coding method. | 04-25-2013 |
20130101035 | GROUPING OF TILES FOR VIDEO CODING - Techniques described herein for coding video data include techniques for coding pictures partitioned into tiles, in which each of the plurality of tiles in a picture is assigned to one of a plurality of tile groups. One example method for coding video data comprising a picture that is partitioned into a plurality tiles comprises coding video data in a bitstream, and coding, in the bitstream, information that indicates one of a plurality of tile groups to which each of the plurality of tiles is assigned. The techniques for grouping tiles described herein may facilitate improved parallel processing for both encoding and decoding of video bitstreams, improved error resilience, and more flexible region of interest (ROI) coding. | 04-25-2013 |
20130101036 | Sample-Based Angular Intra-Prediction in Video Coding - A method for processing a prediction unit (PU) to generate predicted samples is provided that includes computing predicted samples for samples of the PU using sample-based angular intra-prediction (SAP) when lossless coding is enabled for the PU, and computing predicted samples for the samples of the PU using block-based angular intra-prediction when lossless coding is not enabled for the PU. Computation of the predicted using SAP includes determining an intra-prediction angle for the PU, and computing a predicted sample for each sample of the samples in the PU based on linear interpolation of two reference samples adjacent to the sample, wherein the two reference samples are selected according to the intra-prediction angle. | 04-25-2013 |
20130101037 | VIDEO ENCODING DEVICE, VIDEO DECODING DEVICE, VIDEO ENCODING METHOD, VIDEO DECODING METHOD, AND PROGRAM - A video encoding device includes: pixel bit length increasing means for increasing a pixel bit length of an input image based on pixel bit length increase information; transform means for transforming output data of the pixel bit length increasing means; entropy encoding means for entropy-encoding output data of the transform means; non-compression encoding means for non-compression-encoding input data; multiplexed data selection means for selecting output data of the entropy encoding means or output data of the non-compression encoding means; and multiplexing means for multiplexing the pixel bit length increase information in a bitstream, wherein a pixel bit length of an image corresponding to the output data of the entropy encoding means and a pixel bit length of an image corresponding to the output data of the non-compression encoding means are different from each other. | 04-25-2013 |
20130101038 | Predicted Reference Information Generating Method, Video Encoding and Decoding Methods, Apparatuses Therefor, Programs Therefor, and Storage Media Which Store the Programs - When video images are processed by applying temporal or spatial interframe prediction encoding to each divided area, and generating a predicted image of a processing target area based on a reference frame of the processing target area and reference information which indicates a predicted target position of the processing target area in the reference frame, predicted reference information is generated as predicted information of the reference information. Reference information used when an area adjacent to the processing target area was processed is determined as predicted reference information prediction data used for predicting the reference information of the processing target area. Reference area reference information is generated using one or more pieces of reference information used when a reference area indicated by the prediction data was processed. The predicted reference information prediction data is updated using the reference area reference information. The predicted reference information is generated using one or more pieces of the updated predicted reference information prediction data. | 04-25-2013 |
20130107949 | SCALABLE VIDEO CODING METHOD AND APPARATUS USING INTRA PREDICTION MODE | 05-02-2013 |
20130107950 | NON-SQUARE TRANSFORMS IN INTRA-PREDICTION VIDEO CODING | 05-02-2013 |
20130107951 | MAPPING STATES IN BINARY ARITHMETIC CODER FOR VIDEO CODING | 05-02-2013 |
20130107952 | UNIFIED DESIGN FOR PICTURE PARTITIONING SCHEMES | 05-02-2013 |
20130107953 | RANDOM ACCESS WITH ADVANCED DECODED PICTURE BUFFER (DPB) MANAGEMENT IN VIDEO CODING | 05-02-2013 |
20130107954 | CARRIAGE OF SEI MESSAGES IN RTP PAYLOAD FORMAT | 05-02-2013 |
20130107955 | MOVING-PICTURE ENCODING APPARATUS AND MOVING-PICTURE DECODING APPARATUS | 05-02-2013 |
20130107956 | GENERATION OF HIGH DYNAMIC RANGE IMAGES FROM LOW DYNAMIC RANGE IMAGES | 05-02-2013 |
20130114704 | Utilizing A Search Scheme for Screen Content Video Coding - A method, a device and computer readable storage media facilitate providing screen content including a plurality of video frames that are displayed by a computing device. During coding of the screen content, a suitable predictor is found that is used to code pixel blocks from one or more frames. The suitable predictor is found by selecting a pixel block of a current frame, conducting a direction based search by comparing pixel blocks within a search window of a reference frame with the selected pixel block of the current frame to determine whether a match exists, and, in response to a determination that no sufficient match has been found, conducting a feature oriented search by comparing pixel blocks of the reference frame with the selected pixel block of the current frame to find a suitable match based upon a common feature. | 05-09-2013 |
20130114705 | MULTIVIEW VIDEO CODING - Aspects of this disclosure relate to a method of coding video data. In an example, the method includes obtaining, from an encoded bitstream and for any view component of a first view, reference view information indicating one or more reference views for predicting view components of the first view. The method also includes including, for decoding a first view component in an access unit and in the first view, one or more reference candidates in a reference picture list, where the one or more reference candidates comprise view components in the access unit and in the reference views indicated by the reference view information, where the number of reference candidates is equal to the number of reference views. The method also includes decoding the first view component based on the one or more reference candidates in the reference picture list. | 05-09-2013 |
20130114706 | METHOD AND APPARATUS FOR PROCESSING COMPONENTS OF AN IMAGE - A method for processing components of an image for coding a sample of the image, the image being composed of a first type of component and a second type of component, wherein samples of the second type of component are predictable from samples of the first type of component using a prediction model, computing one parameter value for use in representing, in the prediction model, the link between the first type of component and the second type of component; detecting, whether or not, one type of error exists in one such computed parameter value of the prediction model and in the case where a first type of error is detected; adapting the computed parameter value to correct for the error detected; and predicting a sample of the second type from a sample of the first type using the prediction model and the adapted parameter value. | 05-09-2013 |
20130114707 | INTRA-MODE VIDEO CODING - This disclosure relates to methods and apparatus for encoding and decoding video data. In an example an intra-mode for predicting a current block of video data and most probable intra-modes (MPMs) for predicting the current block of video data may be determined. MPMs for predicting the current block of video data may be determined. An index for each of the MPMs based on an order in which the intra-mode for predicting the current block is compared to the MPMs may be determined. When one of the MPMs for predicting the current block matches the intra-mode for predicting the current block, the index of the matching MPM. | 05-09-2013 |
20130114708 | SECONDARY BOUNDARY FILTERING FOR VIDEO CODING - In one example, a video coding device is configured to intra-predict a block of video data, using values of pixels along a primary boundary of the block, to form a predicted block, determine whether to filter the predicted block using data of a secondary boundary of the block, and filter the predicted block using data of the secondary boundary in response to determining to filter the predicted block. The video coding device may determine whether to filter the predicted block based on a comparison of a Laplacian value or a gradient difference value to a threshold. The determination of whether to filter the predicted block may be based at least in part on a boundary relationship, e.g., the relationship of one boundary to another, or of a boundary to pixel values of the predicted block. | 05-09-2013 |
20130114709 | IMAGE CODING APPARATUS, IMAGE CODING METHOD, IMAGE DECODING APPARATUS, IMAGE DECODING METHOD, AND STORAGE MEDIUM - An image coding apparatus includes a quantization matrix coding unit configured to code quantization matrices, wherein the quantization matrix coding unit is configured to code a difference between a coefficient to be coded and a coefficient adjacent to the coefficient to be coded, and to use, when coding the difference having a positive value, a coding table that uses a code of a bit number equal to or less than that of a code used to code the difference having a negative value having the same absolute value as the absolute value of the positive value. | 05-09-2013 |
20130114710 | METHOD AND APPARATUS FOR ENCODING VIDEO BY PREDICTION USING REFERENCE PICTURE LIST, AND METHOD AND APPARATUS FOR DECODING VIDEO BY PERFORMING COMPENSATION USING REFERENCE PICTURE LIST - A video prediction encoding method including setting a default number of reference images assigned to a list combination (LC) reference list in units of pictures, the LC reference list including at least one reference image from among a plurality of reference images included in reference lists L | 05-09-2013 |
20130114711 | SYSTEM FOR PARALLEL INTRA-PREDICTION DECODING OF VIDEO DATA - A system for decoding video data includes a processing unit. The processing unit includes a plurality of processing pipelines and a driver. The driver includes a decoder configured to generate a plurality of intermediate control maps containing control information including an indication of which macro blocks or portions of macro blocks may be processed in parallel in the plurality of processing pipelines. | 05-09-2013 |
20130114712 | DECODING DEVICE AND CODING DEVICE - A moving image decoder ( | 05-09-2013 |
20130114713 | LOW-COMPLEXITY INTRA PREDICTION FOR VIDEO CODING - The present invention provides a unique intra prediction process which improves the efficiency of video coding. H.264/AVC uses reference pixels in a horizontal boundary located immediately above a target block to be predicted and reference pixels in a vertical boundary located immediately left of the target block. In the present invention, at least some of one of an array of horizontal boundary pixels and an array of vertical boundary pixels are retrieved. Then, the retrieved pixels are added to the other boundary pixels to extend the array thereof. Intra prediction is performed, based solely on the extended array of boundary pixels. | 05-09-2013 |
20130114714 | IMAGE PROCESSING DEVICE AND IMAGE PROCESSING METHOD - Provided is an image processing device including a sorting section for sorting pixel values included in an image such that a pixel value of a first pixel of a first sub-block included in a macro block in the image and a pixel value of a second pixel of a second sub-block included in the macro block are in succession, and a pixel value of a third pixel of the first sub-block and a pixel value of a fourth pixel of the second sub-block are in succession; a first prediction section for generating predicted pixel values for the first pixel and the second pixel using the pixel values sorted by the sorting section; and a second prediction section for generating predicted pixel values for the third pixel and the fourth pixel in parallel with processing of the first prediction section, using the pixel values sorted by the sorting section. | 05-09-2013 |
20130121410 | Method and Apparatus of Video Encoding with Partitioned Bitstream - A method and apparatus for video encoding to generate a partitioned bitstream without buffering transform coefficient and/or prediction data for subsequent coding units are disclosed. An encoder incorporating an embodiment according to the present invention receives first video parameters associated with a current coding unit, wherein no first video parameters associated with subsequent coding units are buffered. The encoder then encodes the first video parameters to generate a current first compressed data corresponding to the current coding unit. A first memory address in the first logic unit is determined and the encoder provides the current first compressed data at the first memory address in the first logic unit. | 05-16-2013 |
20130121411 | AUDIO OR VIDEO ENCODER, AUDIO OR VIDEO DECODER AND RELATED METHODS FOR PROCESSING MULTI-CHANNEL AUDIO OR VIDEO SIGNALS USING A VARIABLE PREDICTION DIRECTION - An encoder/decoder is based on a combination of two audio or video channels to obtain a first combination signal as a mid-signal and a residual signal derivable using a predicted side signal derived from the mid-signal. A decoder uses the prediction residual signal, the first combination signal, a prediction direction indicator and prediction information to derive decoded first channel and second channel signals. A real-to-imaginary transform can be applied for estimating the imaginary part of the spectrum of the first combination signal. The prediction signal used in the derivation of the prediction residual signal, the real-valued first combination signal is multiplied by a real portion of the complex prediction information and the estimated imaginary part of the first combination signal is multiplied by an imaginary portion of the complex prediction information. | 05-16-2013 |
20130121412 | VIDEO ENCODING METHOD, VIDEO DECODING METHOD, VIDEO ENCODING APPARATUS, VIDEO DECODING APPARATUS, VIDEO ENCODING PROGRAM, AND VIDEO DECODING PROGRAM - A video processing system is provided with video encoding apparatus | 05-16-2013 |
20130121413 | CARRIAGE OF SEI MESSAGES IN RTP PAYLOAD FORMAT - A system and method of modifying error resiliency features by conveying temporal level 0 picture indices, such as t10_pic_idx, within an SEI message instead of optionally including them in the NAL unit header is provided. In addition, a mechanism is provided for enabling repetition of any SEI messages in Real-Time Transport Protocol (RTP) packets. Enabling such repetition of any SEI messages facilitates detection of lost temporal level 0 pictures on the basis of any received packet. | 05-16-2013 |
20130121414 | IMAGE INTRA-PREDICTION MODE ESTIMATION DEVICE, IMAGE ENCODING DEVICE, IMAGE DECODING DEVICE, AND ENCODED IMAGE DATA - A coding device and a decoding device are configured to include an estimated prediction mode deciding section ( | 05-16-2013 |
20130121415 | METHODS AND APPARATUSES FOR ENCODING AND DECODING VIDEO USING INTER-COLOR-PLANE PREDICTION - Recent video coding schemes support inter-color-plane prediction to achieve higher coding efficiency and improved visual quality. Inter-color-plane prediction schemes in the prior art do not account for the variety of video content representations that are used in practice. The current invention provides methods and apparatuses for performing inter-color-plane prediction with adaptability to various existing video content representations. The benefit of the current invention is in the form of improved applicability and coding efficiency of inter-color-plane prediction techniques. | 05-16-2013 |
20130128963 | Multiple-Pass Rate Control for Video Coding Applications - Methods and systems for coding applications are described, where multiple coding passes are performed for purposes of rate control. Prediction structures are generated and used by the multiple coding passes to update coding statistics generated prior to the coding passes. The updated coding statistics are used for a subsequent coding operation. | 05-23-2013 |
20130128964 | REFERENCE MODE SELECTION IN INTRA MODE CODING - A video coder can determine a first most probable intra prediction mode and a second most probable intra prediction mode for a current video block, and based on the first and second most probable intra prediction modes, determine an estimate of an actual intra prediction mode used to code the current video block. The estimate of the actual intra prediction mode can be determined by selecting one of the first most probable mode and the second most probable mode as the estimate of the actual intra prediction in response to both the first most probable mode and the second most probable mode being different angular prediction modes. The estimate of the actual intra prediction mode plus difference information can be used to identify the actual intra prediction mode used to code the current video block. | 05-23-2013 |
20130128965 | INSIDE VIEW MOTION PREDICTION AMONG TEXTURE AND DEPTH VIEW COMPONENTS - The techniques of this disclosure may be generally related to using motion information for a corresponding block from a texture view component that corresponds with a block in a depth view component in coding the block in the depth view component. In some examples, for coding purposes, the techniques may use motion information when the spatial resolution of the texture view component is different than the spatial resolution of the depth view component. | 05-23-2013 |
20130128966 | Scanning of Prediction Residuals in High Efficiency Video Coding - A video codec comprising a processor configured to generate a prediction block for a current block, compute a difference between the current block and the prediction block to generate a residual block, scan a plurality of prediction residuals located in the residual block following a scanning order, and if the plurality of residual values comprise at least one non-zero prediction residual, entropy encode the at least one non-zero prediction residual. A method comprising generating a prediction block for a current block, computing a difference between the current block and the prediction block to generate a residual block, scanning a plurality of prediction residuals located in the residual block, and if the plurality of residual values comprise at least one non-zero prediction residual, entropy encoding the at least one non-zero prediction residual. | 05-23-2013 |
20130128967 | EXPLICIT WAY FOR SIGNALING A COLLOCATED PICTURE FOR HIGH EFFICICENCY VIDEO CODING (HEVC) - A system is provided for determining a collocated reference picture to enable encoding and decoding of a current picture for high efficiency video coding (HEVC). The collocated picture is identified by accessing syntax that can include an index for a list | 05-23-2013 |
20130128968 | Method for predicting a shape of an encoded area using a depth map - A method for predicting a shape of an encoded area using a depth map. The method includes synthesizing a virtual depth map and identifying disoccluded regions in the virtual depth map, wherein the disoccluded regions provide a predicted a shape of an area under compression. | 05-23-2013 |
20130128969 | EXPLICIT WAY FOR SIGNALING A COLLOCATED PICTURE FOR HIGH EFFICICENCY VIDEO CODING (HEVC) USING REFERENCE LIST0 AND LIST1 - A system is provided for determining a collocated reference picture to enable encoding and decoding of a current picture for high efficiency video coding (HEVC). The collocated picture is identified by accessing syntax that can include an index for a list0 and a list1, a reference picture set number indicating the number of pictures in list0 and list1, and a flag indicating if the collocated picture is in list0 or list1. The system can further use slice type to determine if both list0 and list1 should be accessed. | 05-23-2013 |
20130128970 | EXPLICIT WAY FOR SIGNALING A COLLOCATED PICTURE FOR HIGH EFFICICENCY VIDEO CODING (HEVC) USING A SINGLE REFERENCE LIST - A system is provided for determining a collocated reference picture to enable encoding and decoding of a current picture for high efficiency video coding (HEVC). The collocated picture is identified by accessing syntax that can include an index for a list | 05-23-2013 |
20130128971 | TRANSFORMS IN VIDEO CODING - Aspects of this disclosure relate to coding video data. In an example, a method of coding video data includes determining a first residual quadtree (RQT) depth at which to apply one or more first transforms to residual video data based on at least one characteristic of the residual of video data. The method also includes determining a second RQT depth at which to apply one or more second transforms to the residual video data based on the at least one characteristic. The method also includes coding the residual video data using the one or more first transforms and the one or more second transforms. | 05-23-2013 |
20130128972 | IMAGE ENCODING APPARATUS AND IMAGE DECODING APPARATUS - According to one embodiment, an image encoding apparatus includes a setting unit configured to set a combination of a vertical transform matrix and a horizontal transform matrix corresponding to the target image. The combination includes any of a plurality of transform matrices including a first transform matrix and a second transform matrix which increases a coefficient density compared to the first transform matrix if a one-dimensional orthogonal transformation in a direction orthogonal to a line of a group of reference pixels on at least one line is performed on the prediction error in the intra-prediction mode in which the group of reference pixels is referenced to generate an intra-prediction image. | 05-23-2013 |
20130128973 | METHOD AND APPARATUS FOR ENCODING AND DECODING AN IMAGE USING A REFERENCE PICTURE - A method and apparatus for encoding and decoding an image by performing motion prediction and compensation on pictures in a group of pictures by selectively using a high-quality key picture that is previously encoded and restored, and a second picture that is previously encoded and restored. The method of encoding an image improves the prediction efficiency of an image by storing a key picture, which is encoded and restored to a high quality by reducing a loss caused by a quantization error using a small quantization coefficient, in a first storage unit and storing a previously encoded and restored second picture in a second storage unit, and then performing motion prediction and compensation by selectively using the key picture stored in the first storage unit and the second picture stored in the second storage unit while encoding a next picture in a group of pictures. | 05-23-2013 |
20130136174 | LUMA-BASED CHROMA INTRA PREDICTION - Systems, devices and methods for performing luma-based chroma ultra prediction are described. Down-sample filters may be applied to luma values of luma pixel positions to generate reconstructed luma values for chroma pixel positions in a prediction unit of an intra frame. The down-sampled reconstructed luma values may then be used to predict chroma values for the chroma pixel positions. In some implementations, a reconstructed luma value of a chroma position may be used to predict that position's chroma value. In other implementations, reconstructed luma values of neighboring chroma pixel positions may be analyzed to adaptively predict a chroma value for a chroma pixel position. | 05-30-2013 |
20130136175 | NON-SQUARE TRANSFORM UNITS AND PREDICTION UNITS IN VIDEO CODING - This disclosure proposes techniques for transform partitioning in an intra-prediction video coding process. In one example, for a given intra-predicted block, a reduced number of transform unit partition options is allowed, based on certain conditions. In another example, transform units are decoupled from prediction units for intra-predicted block. For a given prediction unit, transforms of different sizes and shapes from the prediction unit may be applied. In another example, a reduced number of intra-prediction modes are allowed for a prediction unit having a non-square shape. | 05-30-2013 |
20130136176 | ACTIVATION OF PARAMETER SETS FOR MULTIVIEW VIDEO CODING (MVC) COMPATIBLE THREE-DIMENSIONAL VIDEO CODING (3DVC) - In general, techniques are described for separately coding depth and texture components of video data. A video coding device for coding video data that includes a view component comprised of a depth component and a texture component may perform the techniques. The video coding device may comprise, as one example, a processor configured to activate a parameter set as a texture parameter set for the texture component of the view component, and code the texture component of the view component based on the activated texture parameter set. | 05-30-2013 |
20130136177 | VIDEO DECODING APPARATUS, VIDEO CODING APPARATUS, VIDEO DECODING METHOD, VIDEO CODING METHOD, AND PROGRAM - In the present invention, reconstructed images for prediction are stored in uncompressed reference picture memory and compressed reference picture memory. A video decoder stores in uncompressed reference picture memory a reconstructed image of a frame to be decoded which has been generated on the basis of a prediction, and among reconstructed images which have been stored in the uncompressed reference picture memory, compresses a reconstructed image that will not be used for prediction of the frame to be decoded and stores the image in the compressed reference picture memory. Using the reconstructed images which are stored in the uncompressed reference picture memory and the compressed reference picture memory, the video bitstream is decoded into a video. | 05-30-2013 |
20130136178 | IMAGE DECODING METHOD, IMAGE CODING METHOD, IMAGE DECODING APPARATUS, IMAGE CODING APPARATUS, PROGRAM, AND INTEGRATED CIRCUIT - An image decoding method includes: restoring a selected prediction mode used in prediction at a time of coding; and decoding a current block included in coded image data to generate a decoded block, according to the prediction based on the selected prediction mode. The restoring includes: determining a first estimated prediction mode; determining a second estimated prediction mode different from the first estimated prediction mode; and restoring the selected prediction mode based on the mode information, the first estimated prediction mode, and the second estimated prediction mode. | 05-30-2013 |
20130142256 | CODING LEAST SIGNFICANT BITS OF PICTURE ORDER COUNT VALUES IDENTIFYING LONG-TERM REFERENCE PICTURES - In general, techniques are described for coding picture order count values identifying long-term reference pictures. A video decoding device comprising a processor may perform the techniques. The processor may be configured to determine a number of bits used to represent least significant bits of the picture order count value that identifies a long-term reference picture to be used when decoding at least a portion of a current picture and parse the determined number of bits from a bitstream representative of the encoded video data. The parsed bits represent the least significant bits of the picture order count value. The processor retrieves the long-term reference picture from a decoded picture buffer based on the least significant bits, and decodes at least the portion of the current picture using the retrieved long-term reference picture. | 06-06-2013 |
20130142257 | CODING PICTURE ORDER COUNT VALUES IDENTIFYING LONG-TERM REFERENCE FRAMES - In general, techniques are described for coding picture order count values identifying long-term reference pictures. A video decoding device comprising a processor may perform the techniques. The processor may determine least significant bits (LSBs) of a picture order count (POC) value that identifies a long-term reference picture (LTRP). The LSBs do not uniquely identify the POC value with respect to the LSBs of any other POC value identifying any other picture in a decoded picture buffer (DPB). The processor may determine most significant bits (MSBs) of the POC value. The MSBs combined with the LSBs is sufficient to distinguish the POC value from any other POC value that identifies any other picture in the DPB. The processor may retrieve the LTRP from the decoded picture buffer based on the LSBs and MSBs of the POC value, and decode a current picture of the video data using the retrieved LTRP. | 06-06-2013 |
20130142258 | IMAGE PROCESSING APPARATUS - When identification information of an appending start frame coincides with identification information of the final frame of moving image data of an existing moving image file, an image processing apparatus changes the appending start frame to another frame. | 06-06-2013 |
20130142259 | METHOD OFFOR SIGNALING IMAGE INFORMATION, AND METHOD OFFOR DECODING IMAGE INFORMATION USING SAME - The present invention relates to a method offor signaling information on a prediction mode and to a method of for decoding image information using same. According to the present invention, the method offor signaling prediction mode information, serving according to the present invention, as a method offor signaling image information, includes performing prediction on a current block and signaling the prediction-type information applied to the current block. The signaling of the information includes joint-coding and components of signaling information components constituting the prediction-type information. According to the present invention, overhead may be reduced when information on a prediction is signaled. | 06-06-2013 |
20130142260 | IMAGE CODING METHOD AND IMAGE DECODING METHOD - An image coding method includes obtaining image format information, determining a subsampling method for a luminance signal, storing the subsampling method in a memory, obtaining the subsampling method from the memory, performing subsampling on a luminance signal of a surrounding pixel, calculating a parameter of the linear model using (i) the luminance signal that is subsampled and (ii) chrominance of the surrounding pixel, performing subsampling on the luminance signal of the current block to be coded, and calculating prediction chrominance of the current block to be coded using (i) the parameter of the linear model and (ii) the luminance signal that is subsampled. | 06-06-2013 |
20130148720 | SELECTIVE MIRRORING OF MEDIA OUTPUT - According to some aspects, this disclosure describes techniques for mirroring native media output of a source device via a different destination device. According to the techniques described herein, the source device may control the destination device to the media via an output interface associated with the destination device. The source device may receive a media element of the native media. In response to receiving the native media element, the source device may determine whether to output (mirror) the native media including the media element based on at least one parameter associated with the media element. According to other aspects, this disclosure describes techniques for preventing at least one media element from being mirrored via a destination device operating to mirror other native media. As one example, the source device may change how the source device encodes at least one region associated with the media element, in order to freeze media output associated with the at least one region. | 06-13-2013 |
20130148721 | Reference Frame Management for Screen Content Video Coding Using Hash or Checksum Functions - Techniques are provided for reference frame management for screen content video coding using hash or checksum functions. A video data stream including a plurality of frames is received, each frame including a plurality of pixels that define content within the frame. A plurality of hash code values associated with partitioned portions of a current frame are determined, where each hash code value is determined as an output value from a hash or checksum function based upon an input value comprising pixel values for a corresponding partition within the current frame. The current frame is compared with a plurality of reference frames based upon a comparison of the hash code values of the current frame with hash code values of the reference frames. A reference frame is selected as a candidate reference frame for coding the current frame. | 06-13-2013 |
20130148722 | REFERENCE PICTURE LIST MODIFICATION FOR VIEW SYNTHESIS REFERENCE PICTURES - A video encoder generates a bitstream that includes a reference picture list modification (RPLM) command. The RPLM command belongs to a type of RPLM commands for inserting short-term reference pictures into reference picture lists. The RPLM command instructs a video decoder to insert a synthetic reference picture into the reference picture list. The video decoder decodes, based at least in part on syntax elements parsed from the bitstream, one or more view components and generates, based at least in part on the one or more view components, the synthetic reference picture. The video decoder modifies, in response to the RPLM commands, a reference picture list to include the synthetic reference picture. The video decoder may use one or more pictures in the reference picture list as reference pictures to perform inter prediction on one or more video blocks of a picture. | 06-13-2013 |
20130148723 | Block Error Compensating Apparatus Of Image Frame And Method Thereof - An apparatus and method are provided for compensating a block error in an image frame. This may include a video codec decoder for decoding an inputted image frame, and outputting a decoded image frame. An error concealment block may detect an error-generated block in the decoded image frame and compensate the detected error block through a median filter, and output the compensated image frame. | 06-13-2013 |
20130148724 | Block Error Compensating Apparatus Of Image Frame And Method Thereof - An apparatus and method are provided for compensating a block error in an image frame. This may include a video codec decoder for decoding an inputted image frame, and outputting a decoded image frame. An error concealment block may detect an error-generated block in the decoded image frame and compensate the detected error block through a median filter, and output the compensated image frame. | 06-13-2013 |
20130148725 | Block Error Compensating Apparatus Of Image Frame And Method Thereof - An apparatus and method are provided for compensating a block error in an image frame. This may include a video codec decoder for decoding an inputted image frame, and outputting a decoded image frame. An error concealment block may detect an error-generated block in the decoded image frame and compensate the detected error block through a median filter, and output the compensated image frame. | 06-13-2013 |
20130148726 | METHOD AND APPARATUS FOR ENCODING AND DECODING BASED ON INTRA PREDICTION - Methods and apparatuses for encoding and decoding based on intra prediction. The method of encoding an image based on intra prediction comprises dividing a current block into a plurality of sub blocks so that a plurality of unit blocks adjacent to each other are included in one of the sub blocks based on an intra prediction direction of each of the unit blocks included in the current block, and performing intra prediction encoding on each of the sub blocks so that only information about one intra prediction direction is encoded in each of the sub blocks. | 06-13-2013 |
20130148727 | METHOD AND APPARATUS FOR ENCODING VIDEO, AND METHOD AND APPARATUS FOR DECODING VIDEO - Disclosed is a method of encoding a video, the method including: splitting a current picture into at least one maximum coding unit; determining a coded depth to output a final encoding result according to at least one split region obtained by splitting a region of the maximum coding unit according to depths, by encoding the at least one split region, based on a depth that deepens in proportion to the number of times the region of the maximum coding unit is split; and outputting image data constituting the final encoding result according to the at least one split region, and encoding information about the coded depth and a prediction mode, according to the at least one maximum coding unit. | 06-13-2013 |
20130148728 | METHOD AND APPARATUS FOR ENCODING VIDEO, AND METHOD AND APPARATUS FOR DECODING VIDEO - Disclosed is a method of encoding a video, the method including: splitting a current picture into at least one maximum coding unit; determining a coded depth to output a final encoding result according to at least one split region obtained by splitting a region of the maximum coding unit according to depths, by encoding the at least one split region, based on a depth that deepens in proportion to the number of times the region of the maximum coding unit is split; and outputting image data constituting the final encoding result according to the at least one split region, and encoding information about the coded depth and a prediction mode, according to the at least one maximum coding unit. | 06-13-2013 |
20130148729 | IMAGE CODING METHOD, IMAGE DECODING METHOD, IMAGE CODING DEVICE, AND IMAGE DECODING DEVICE - An image coding method according to the present invention partitions an input image signal into processing units, and codes the partitioned image to generate a code sequence, the image coding method including: determining a partitioning pattern for hierarchically partitioning the input image signal in order starting from a largest unit of the processing units; generating partition information indicative of the partitioning pattern; and coding partition information, wherein the partition information includes maximum used hierarchy depth information indicative of a maximum used hierarchy depth which is a hierarchy depth of a deepest processing unit of the processing units included in the partitioning pattern. | 06-13-2013 |
20130156101 | HARDWARE-ACCELERATED DECODING OF SCALABLE VIDEO BITSTREAMS - In various respects, hardware-accelerated decoding is adapted for decoding of video that has been encoded using scalable video coding. For example, for a given picture to be decoded, a host decoder determines whether a corresponding base picture will be stored for use as a reference picture. If so, the host decoder directs decoding with an accelerator such that the some of the same decoding operations can be used for the given picture and the reference base picture. Or, as another example, the host decoder groups encoded data associated with a given layer representation in buffers. The host decoder provides the encoded data for the layer to the accelerator. The host decoder repeats the process layer-after-layer in the order that layers appear in the bitstream, according to a defined call pattern for an acceleration interface, which helps the accelerator determine the layers with which buffers are associated. | 06-20-2013 |
20130156102 | METHOD AND APPRATUS TO PRIORITIZE VIDEO INFORMATION DURING CODING AND DECODING - A method and apparatus prioritizing video information during coding and decoding. Video information is received and an element of the video information, such as a visual object, video object layer, video object plane or keyregion, is identified. A priority is assigned to the identified element and the video information is encoded into a bitstream, such as a visual bitstream encoded using the MPEG-4 standard, including an indication of the priority of the element. The priority information can then be used when decoding the bitstream to reconstruct the video information | 06-20-2013 |
20130163663 | IMPLICIT DETERMINATION OF COLLOCATED PICTURE FOR TEMPORAL PREDICTION - In one embodiment, a method determines a block of a current picture and a prediction type associated with the block. Also, the method determines one of a first list of reference pictures and a second list of reference pictures for the block. An encoder or a decoder selects the one of the first list of reference pictures or the second list of reference pictures implicitly without communication of information between the encoder and the decoder indicating which of the first list of reference pictures or the second list of reference pictures was selected. Then, the method sets a reference picture in the selected one of the first list of reference pictures and the second list of reference pictures as a collocated picture for the block. The selected reference picture is used in a temporal prediction process for the block. | 06-27-2013 |
20130163664 | UNIFIED PARTITION MODE TABLE FOR INTRA-MODE CODING - In an example, aspects of this disclosure relate to a method for coding video data that includes predicting a first non-square partition of a current block of video data using a first intra-prediction mode, where the first non-square partition has a first size. The method also includes predicting a second non-square partition of the current block of video data using a second intra-prediction mode, where the second non-square partition has a second size different than the first size. The method also includes coding the current block based on the predicted first and second non-square partitions. | 06-27-2013 |
20130163665 | MOVING IMAGE ENCODING APPARATUS AND MOVING IMAGE ENCODING METHOD - There is provided a moving image encoding apparatus comprising: an encoding unit which encodes moving image data using inter-frame prediction, the moving image data being input by an image pickup unit which captures an object image, and generates an encoded bitstream; a setting unit which performs settings for an encoding process performed by the encoding unit; a transmitting unit which transmits setting information created by the setting unit to an external moving image encoding apparatus; a receiving unit which receives setting information for an encoding process transmitted by the external moving image encoding apparatus; and an encoding control unit which controls the encoding process performed by the encoding unit in accordance with a first setting made by the setting unit and a second setting based on the setting information received by the receiving unit. | 06-27-2013 |
20130163666 | Method and System for Illumination Compensation and Transition for Video Coding and Processing - Deriving illumination compensation parameters and detection of illumination dominant transitions types for video coding and processing applications is described. Illumination changes such as fade-ins, fade-outs, cross-fades, and flashes are detected. Detection of these illumination changes is then used for weighted prediction to provide for improved illumination compensation. | 06-27-2013 |
20130163667 | VIDEO STREAMING - The network contains one or more network based video servers connected to one or more video receivers over a shared network. Multiple pieces of video content are each encoded at a number of constant quality levels and stored on one or more of the network based servers. In response to requests from a receiver, video content is selected on a server and delivered over the shared network to the receiver. The system selects the quality level of the stream to deliver based on characteristics of the video stream currently being delivered, and the number of bits already buffered at the video receiver and the available network throughput. The aim is to select the video quality being delivered according to the available network throughput so as maximise the quality while ensuring that all video data is delivered over the network in time for it to be decoded and displayed without interruption. The invention proposes a method for making that selection in advance. | 06-27-2013 |
20130170546 | METHOD OF ADAPTIVE INTRA PREDICTION MODE ENCODING AND APPARATUS FOR THE SAME, AND METHOD OF ENCODING AND APPARATUS FOR THE SAME - Disclosed are a method and an apparatus for intra prediction mode encoding that may increase compression efficiency of intra prediction mode encoding. The intra prediction mode encoding method may include detecting a similarity of a prediction direction of a neighbor block with respect to a current block based on a position of the neighbor block and an intra prediction direction of the neighbor block with respect to the current block, and determining a candidate prediction mode of the current block based on the similarity and the number of candidate intra prediction modes (N). Accordingly, intra encoding performance of an image may be improved by more accurately and efficiently compressing information about an intra prediction mode of a current block by considering local statistics, which is different from a related art in which only global statistics are considered. | 07-04-2013 |
20130170547 | VIDEO TRANSMISSION APPARATUS AND CONTROL METHOD FOR VIDEO TRANSMISSION APPARATUS - Waiting-for-transmission fragments that cannot be transmitted by a transmission unit due to the interruption of transmission by the transmission unit are stored. In accordance with the waiting-for-transmission fragments, a fragment to be transmitted prior to a first fragment including an intra-coded frame is eliminated from the waiting-for-transmission fragments. The transmission unit is controlled so that the first fragment is transmitted at the resumption of transmission. | 07-04-2013 |
20130170548 | VIDEO ENCODING DEVICE, VIDEO DECODING DEVICE, VIDEO ENCODING METHOD, VIDEO DECODING METHOD AND PROGRAM - The present invention is a video encoding device having: video encoder for encoding an inputted video on the basis of a prediction; reference picture compressor for compressing a reference picture used for the prediction; storage for storing the compressed reference picture; reference picture decompressor for decompressing the compressed reference picture stored in the storage; compression and decompression controller for controlling the reference picture compressor and the reference picture decompressor on the basis of predetermined control information; quantized information encoder for encoding a portion of the control information of the compression and decompression control means by means of a predetermined method and for generating a quantized information bitstream; and multiplexer for multiplexing the video bitstream from the video encoder, at least a portion of the control information excluding the portion that was encoded by means of the quantized information encoder, and the quantized information bitstream. | 07-04-2013 |
20130177077 | Method, Apparatus and Computer Program Product for Encoding Video Data - According to various embodiments, a method for encoding video data, and a corresponding apparatus and computer program product. The method includes: applying one of a first transform and a second transform to at least one row of a pixel block, and applying one of the first transform and the second transform to at least one column of the pixel block, based on a prediction mode of the pixel block, to transform between residual pixel values of the pixel block and residual transform coefficients of the pixel block. The method also includes: encoding the residual transform coefficients of the pixel block to generate encoded video data. | 07-11-2013 |
20130177078 | APPARATUS AND METHOD FOR ENCODING/DECODING VIDEO USING ADAPTIVE PREDICTION BLOCK FILTERING - Provided are a method and apparatus for encoding/decoding video. The method and apparatus of the present invention involve generating a first prediction block for a block to be decoded, calculating a filter coefficient on the basis of the block adjacent to the first prediction block, and performing filtering on the first prediction block using the filter coefficient so as to generate a second prediction block if information relating to the performance of filtering indicates that filtering should be performed. According to the present invention, accuracy in video prediction and encoding performance are improved. | 07-11-2013 |
20130177079 | METHOD FOR PARTITIONING BLOCK AND DECODING DEVICE - Disclosed are a method for partitioning a block and a decoding device. A method for decoding an image comprises the steps of: partitioning one prediction unit, in which an intra prediction is performed in a predetermined intra prediction mode, into a plurality of transform units; and performing the intra prediction for each of the plurality of the transform units on the basis of the predetermined intra prediction mode. Thus, the invention increases the image encoding efficiency. | 07-11-2013 |
20130182763 | VIDEO ENCODING APPARATUS, DECODING APPARATUS AND VIDEO ENCODING METHOD - According to one embodiment, a video encoding apparatus includes a controller, a loop filter processor, a interpolation filter, a generator, a transform unit, a quantizer, an encoder. The interpolation filter processor directly calculates, if motion compensation prediction of quarter pixel precision is performed, a sub-pixel value of a sub-pixel displaced from an integer-pixel by a quarter pixel in a horizontal direction or a vertical direction based on integer-pixel values of a reproduction image signal, and to generate a reference image including a integer-pixel and a sub-pixel. | 07-18-2013 |
20130182764 | IMAGE PROCESSING METHOD AND IMAGE PROCESSING APPARATUS - An image processing method of performing filtering on image blocks using a plurality of deblocking filters having different filter strengths includes: a first parameter calculating step of calculating a first parameter indicating a boundary strength; a second parameter calculating step of calculating a second parameter indicating a limit value for each of the deblocking filters, based on the first parameter and a quantization parameter; and a selecting step of selecting a deblocking filter to be used in the filtering from among the deblocking filters, using one or more threshold values which are determined based on the second parameter. | 07-18-2013 |
20130182765 | In-loop Filtering for Lossless Coding Mode in High Efficiency Video Coding - An apparatus comprising a processor configured to generate a reconstructed pixel, selectively bypass at least one in-loop filter on the reconstructed pixel, and generate a prediction pixel for a current pixel using at least the reconstructed pixel when the at least one in-loop filter is bypassed. | 07-18-2013 |
20130188695 | LOGICAL INTRA MODE NAMING IN HEVC VIDEO CODING - A method and apparatus of using logical mode numbers during both prediction and coding in the bit stream, such as for high efficiency video coders (HEVC). These logical intra mode numbers are sorted based on angle which as a result leads to improved coding designs with fewer and smaller look-up tables, and a small gain in coding efficiency. Furthermore, by using this type of naming, the number of most probable modes (MPMs) can be readily extended since no additional tables are required. The use of three MPMs achieves a larger gain of 0.25% and 0.31% for the AI_HE and AI_LC cases, respectively. | 07-25-2013 |
20130188696 | Reduced Look-Up Table for LM Mode Calculation - A video codec comprising a processor configured to generate a prediction block for a chroma block, wherein the prediction block comprises a plurality of predicted chroma samples, wherein each of the plurality of predicted chroma samples is based on a first plurality of reconstructed luma samples located in a corresponding reconstructed luma block, a second plurality of reconstructed luma samples located in neighboring blocks of the corresponding reconstructed luma block, and a look-up table, wherein an index of the look-up table is based on the second plurality of reconstructed luma samples, wherein an index of the look-up table has less than 63 values. | 07-25-2013 |
20130188697 | METHOD AND APPARATUS FOR SIGNALING AND CONSTRUCTION OF VIDEO CODING REFERENCE PICTURE LISTS - Improved method and apparatus for signaling of reference pictures used for temporal prediction. The signaling schemes and construction process for different reference picture lists in HEVC Working Draft 5 (WD5) are improved. | 07-25-2013 |
20130188698 | COEFFICIENT LEVEL CODING - In one example, a device includes a video coder configured to code a first set of syntax elements for the coefficients of a residual block of video data, and code, using at least a portion of the first set of syntax elements as context data, a second set of syntax elements for the coefficients, wherein the first set of syntax elements each correspond to a first type of syntax element for the coefficients, and wherein the second set of syntax elements each correspond to a second, different type of syntax element for the coefficients. For example, the first set of syntax elements may comprise values indicating whether the coefficients are significant (that is, have non-zero level values), and the second set of syntax elements may comprise values indicating whether level values for the coefficients have absolute values greater than one. | 07-25-2013 |
20130188699 | CODING OF COEFFICIENTS IN VIDEO CODING - A video encoder performs multiple coding passes on coefficients in a coefficient block. During each coding pass, the video encoder encodes a different set of syntax elements for coefficients in the coefficient block. A video decoder uses the syntax elements for a coefficient to determine the value of the coefficient. When the video encoder performs a coding pass, the video encoder selects a coding context for a syntax element based at least in part on a syntax element generated in an earlier coding pass for a non-causal coefficient and based at least in part on a value of a syntax element generated during the current coding pass for a causal coefficient. The video encoder entropy encodes the syntax element based on the selected coding context. A video decoder performs a similar series of coding passes in which the video decoder selects coding contexts and entropy decodes the syntax elements. | 07-25-2013 |
20130188700 | CONTEXT ADAPTIVE ENTROPY CODING WITH A REDUCED INITIALIZATION VALUE SET - Techniques for coding data, such as, e.g., video data, include coding a first syntax element, conforming to a particular type of syntax element, of a first slice of video data, conforming to a first slice type, using an initialization value set. The techniques further include coding a second syntax element, conforming to the same type of syntax element, of a second slice of video data, conforming to a second slice type, using the same initialization value set. In this example, the first slice type may be different from the second slice type. Also in this example, at least one of the first slice type and the second slice type may be a temporally predicted slice type. For example, the at least one of the first and second slice types may be a unidirectional inter-prediction (P) slice type, or a bi-directional inter-prediction (B) slice type. | 07-25-2013 |
20130188701 | SUB-BLOCK LEVEL PARALLEL VIDEO CODING - The techniques of this disclosure are generally related to parallel coding of video units that reside along rows or columns of blocks in largest coding units. For example, the techniques include removing intra-prediction dependencies between two video units in different rows or columns to allow for parallel coding of rows or columns of the video units. | 07-25-2013 |
20130188702 | Simplification of Mode Dependent Intra Smoothing - An apparatus comprising a processor configured to determine whether to apply an intra smoothing filter for a prediction unit (PU) based on a lookup table (LUT), wherein the LUT comprises data indicating the intra smoothing filter should not be applied for any PU with a block size of 8×8 pixels and associated with directional prediction mode. The disclosure also includes a method comprising generating reference samples, determining a size of a PU block, and selecting the reference samples based on PU block size, wherein filtered reference samples are not selected for PU blocks with a size of 8×8 pixels and associated with directional prediction mode. | 07-25-2013 |
20130188703 | Reference Pixel Reduction for Intra LM Prediction - A video codec comprising a processor configured to generate a prediction block for a chroma block, wherein the prediction block comprises a predicted chroma sample, wherein the predicted chroma sample is based on a filtered reconstructed luma sample located in a corresponding reconstructed luma block, a plurality of downsampled filtered reconstructed luma samples located in positions neighboring the corresponding reconstructed luma block, and a plurality of downsampled chroma samples located in positions neighboring the chroma block. | 07-25-2013 |
20130188704 | Scalable Prediction Type Coding - A method for encoding a video sequence is provided that includes signaling in the compressed bit stream that a subset of a plurality of partitioning modes is used for inter-prediction of a portion of the video sequence, using only the subset of partitioning modes for prediction of the portion of the video sequence, and entropy encoding partitioning mode syntax elements corresponding to the portion of the video sequence, wherein at least one partitioning mode syntax element is binarized according to a pre-determined binarization corresponding to the subset of partitioning modes, wherein the pre-determined binarization differs from a pre-determined binarization for the least one partitioning mode syntax element that would be used if the plurality of partitioning modes is used for inter-prediction. | 07-25-2013 |
20130188705 | Simplification of LM Mode - A video codec comprising a processor configured to compute an average of a plurality of reconstructed chroma samples located in neighboring blocks of a chroma block and adjacent to the chroma block, compute an intermediate variable by applying an integer function on the average of the reconstructed chroma samples, and generate a predicted chroma sample for the chroma block based on the intermediate variable. | 07-25-2013 |
20130188706 | MOVING IMAGE ENCODING DEVICE, MOVING IMAGE DECODING DEVICE, MOVING IMAGE CODING METHOD, AND MOVING IMAGE DECODING METHOD - When carrying out an intra-frame prediction process to generate an intra prediction image by using an already-encoded image signal in a frame, an intra prediction part | 07-25-2013 |
20130188707 | IMAGE ENCODING METHOD AND APPARATUS, IMAGE DECODING METHOD AND APPARATUS, AND PROGRAMS THEREFOR - When the entire image is divided into regions, each of which is subjected to predictive encoding while predicting an image signal by using an independent method assigned to the region, the object number and a representative pixel value for each object are predicted utilizing spatial continuity for the presence of the object, and also using decoded pixel values of a previously-processed neighbor region adjacent to a processing region. Accordingly, it is possible to reduce the amount of code required for encoding the object number in the processing region or the pixel value as a representative of each object in the processing region, where these encoded items are required in highly accurate image signal prediction which can handle any object shape by utilizing the pixel value as a representative of each object in the processing target region and information for identifying the object assigned to each pixel in the processing region. Therefore, efficient image encoding can be implemented. Since the employed decoded pixel values of pixels in a previously-decoded neighbor region are common information between the encoding and decoding sides, appropriate prediction can be performed even in the case where one of multiple image signal prediction modes is selected for each region, like in H.264. | 07-25-2013 |
20130188708 | Multi-View Encoding and Decoding Technique Based on Single-View Video Codecs - A technique for encoding and decoding data pertaining to multiple video views is presented. A method embodiment of the encoding technique comprises the steps of providing first picture stream belonging to a first view and performing a first encoding operation to encode a picture of the first picture stream. The first encoding operation is based on a single-view video codec and provides encoder state information relevant for the encoding of another picture of the first picture stream. Also provided is a second picture stream belonging to a second video view. A second encoding operation is performed to encode a picture of the second picture stream based on the single-view video codec, wherein the second encoding operation is based on the encoder state information provided by the first encoding operation. On the basis of the encoded picture of the first picture stream and encoded picture of the second picture stream, dedicated video streams are generated. | 07-25-2013 |
20130195180 | ENCODING AN IMAGE USING EMBEDDED ZERO BLOCK CODING ALONG WITH A DISCRETE COSINE TRANSFORMATION - An image (a still image or a frame of a video) is divided into macroblocks. The content of a macroblock is predicted based on the content of other macroblocks that are spatially or temporally close to the instant macroblock. The prediction is compared against the actual macroblock content to yield a residual value. The residual is then transformed by a discrete cosine (“DCT”) transformation. The resulting DCT coefficients are grouped into subbands. The subbands are encoded using embedded zero block bitplane coding (“EZBC”), and the EZBC output is sent to a decoder (usually on a device remote from the encoder). The EZBC output is also decoded by a subband-dequantizer process whose output coefficients are fed into an inverse DCT to reconstruct the residual signal. The reconstructed residual is used to refine the coding process. | 08-01-2013 |
20130195181 | METHODS FOR CODING AND DECODING - A method for coding a block of pixels is disclosed. The method comprises the following steps:
| 08-01-2013 |
20130195182 | SIMPLIFICATION OF SIGNIFICANCE MAP CODING - In one embodiment, a method for encoding video data is provided that includes receiving an array of transform coefficients corresponding to a luma component or a chroma component of the video data. The method further includes encoding a significance map for the array, where the encoding includes selecting, using a shared context derivation process that applies to both the luma component and the chroma component, context models for encoding significance values in the significance map. | 08-01-2013 |
20130195183 | VIDEO CODING EFFICIENCY WITH CAMERA METADATA - A system and method for using camera capture settings and related metadata to estimate the parameters for encoding a frame of the captured video data and to modify reference frames to accommodate detected camera setting changes. According to an embodiment, global brightness and color changes in video capture may be modeled by performing a sequence of transform operations on the reference frames to further improve the coding efficiency of a video coding system. | 08-01-2013 |
20130195184 | SCALABLE VIDEO CODING METHOD AND APPARATUS - A scalable video decoding method is provided for extracting a layer of the video bit stream with a decoding level configured selectively according to the layout of the video display screen. The method includes receiving at least one video bit stream composed of at least one layer; determining a decoding level based on a preset screen configuration; extracting the video bit stream layer of the video bit stream according to the decoding level; and decoding the extracted layer. Video bit streams may be selectively decoded so as to save resources, and the decoding level and display screen layout can be adjusted with intuitive manipulation. | 08-01-2013 |
20130195185 | APPARATUS AND METHOD FOR PROVIDING ADDITIONAL INFORMATION TO FUNCTIONAL UNIT IN RECONFIGURABLE CODEC - Disclosed herein is an apparatus and method for providing additional information to an FU in a reconfigurable codec. The apparatus includes a syntax parser, a prediction mode converter unit, and an inverse prediction unit. The syntax parser parses the encoding type value of a multimedia bit stream and a first prediction mode value from the multimedia bit stream. The prediction mode converter unit converts the first prediction mode value into a second prediction mode value corresponding to the encoding type value. The inverse prediction unit determines an inverse prediction operating mode based on the second prediction mode value. | 08-01-2013 |
20130195186 | Scalable Video Coding Extensions for High Efficiency Video Coding - A method of scalable video encoding, the method comprising encoding a first video signal using a base layer encoding, and encoding a second video signal using an enhancement layer encoding, wherein the enhancement layer encoding uses inter-layer prediction information based on the first video signal, wherein one of the first video signal or the second video signal has a resolution of 960×540, wherein the second video signal has a higher resolution than the first video signal, and wherein the first video signal is related to the second video signal by a spatial resolution factor that is an integer or an integer ratio. | 08-01-2013 |
20130195187 | IMAGE PROCESSING DEVICE, IMAGE PROCESSING METHOD, AND PROGRAM - The present invention relates to an image processing device, an image processing method, and a program that can reduce processing loads and delays while suppressing decreases in inter prediction precision when motion compensation operations with fractional precision are performed in inter predictions. When a pixel of a predicted image in an inter prediction has a fractional pixel position that is not a ½ pixel position in the horizontal direction and the vertical direction in a reference image, a reference image read unit | 08-01-2013 |
20130202034 | EXPLICIT WAY FOR SIGNALING A COLLOCATED REFERENCE PICTURE FOR VIDEO CODING - In one embodiment, a method for use in encoding and decoding a group of pictures in a video stream is provided. The method identifies a current picture in the group of pictures for encoding or decoding and determines a slice type for the current picture. When the slice type for the current picture is not equal to an I-type, the method identifies a collocated reference picture in the group of pictures using a syntax to determine if a collocated reference picture index should be accessed to identify the collocated reference picture and uses the collocated reference picture to encode or decode the current picture. | 08-08-2013 |
20130202035 | REFERENCE PICTURE LIST MODIFICATION FOR VIDEO CODING - A video coder may, in some cases, signal whether one or more initial reference picture lists are to be modified. When an initial list is to be modified, the video coder can signal information indicating a starting position in the initial reference picture list. When the starting position signaled by the video coder is less than a number of pictures included in the initial reference picture list, then the video coder signals the number of pictures to be inserted into the initial reference picture list, and a reference picture source from which a picture can be retrieved to insert into the initial reference picture list to construct a modified reference picture list. | 08-08-2013 |
20130208792 | REFERENCE PICTURE SET (RPS) SIGNALING FOR SCALABLE HIGH EFFICIENCY VIDEO CODING (HEVC) - Embodiments contemplate coding video data by generating a video encoded bitstream that may include reference picture set (RPS) extensions for inter-layer reference pictures, and the extensions may include inter-layer delta Picture Order Counts (POCs). Embodiments may also include signaling that lower layer reference pictures may be available in a lower layer decoder picture buffer (DPB), and/or an aggregate DPB, that may be added to the RPS set of a higher layer. The bitstream may include a signal indicating whether the higher layer RPS may be specified by a lower layer RPS, and the lower layer RPS may be temporal, inter-layer prediction (ILP), or both. | 08-15-2013 |
20130208793 | MOTION VIDEO ENCODING APPARATUS, MOTION VIDEO ENCODING METHOD, AND MOTION VIDEO ENCODING COMPUTER PROGRAM - A motion video encoding apparatus includes: a group determining unit which determines to which of a plurality of groups each block belongs; a group decode time information computing unit which computes a decode time for each of the groups; a group information appending unit which appends group information identifying the group to which each block belongs to data to be output; a code amount control unit which controls an amount of code for each block contained in the group so that data needed for decoding all the blocks contained in the group will arrive at a stream receive buffer provided in a motion video decoding apparatus by the decode time of the group when the data is transmitted to the motion video decoding apparatus at a prescribed transmission rate; and an encode processing unit which encodes each block, based on control information concerning the amount of code. | 08-15-2013 |
20130215964 | Scanning Method and Device, and Reverse Scanning Method and Device - A scanning method and device, and a reverse scanning method and device in coding and decoding technologies are provided. The scanning method includes: receiving quantized transformed coefficients of a current block; obtaining a prediction direction of the current block; finding, according to the prediction direction, a scanning order corresponding to the prediction direction of the current block from a mapping relationship table of the prediction direction and the scanning order, wherein at least one scanning order in the mapping relationship table of the prediction direction and the scanning order corresponds to at least two prediction directions; and performing scanning processing on the coefficients by using the scanning order corresponding to the prediction direction of the current block. With the solutions of the present invention, the number of the scanning orders used in coding and decoding is decreased, and system complexity of a codec system is reduced. | 08-22-2013 |
20130215965 | VIDEO ENCODING AND DECODING USING AN EPITOME - A method and apparatus are provided for encoding an image sequence. The method includes the following steps for at least one current image of the sequence, namely: construction of an epitome representative of the current image, from a set of at least two images from the sequence; and inter-image prediction of the current image from the epitome. | 08-22-2013 |
20130223524 | DYNAMIC INSERTION OF SYNCHRONIZATION PREDICTED VIDEO FRAMES - A video bitstream can be encoded and sent over a computer network to a decoding computer system. The bitstream can follow a regular prediction structure when an encoding computer system is not notified of lost data from the bitstream. A notification of lost data in the bitstream can be received. The lost data can include at least a portion of a reference frame of the bitstream. In response, a synchronization predicted frame can be dynamically encoded with a prediction that references one or more other previously-sent frames in the bitstream and that does not reference the lost data. The synchronization predicted frame can be inserted in the bitstream in a position where the regular prediction structure would have dictated inserting a different predicted frame with a prediction that would have referenced the lost data according to the regular prediction structure. | 08-29-2013 |
20130223525 | PIXEL PATCH COLLECTION FOR PREDICTION IN VIDEO CODING SYSTEM - In a video coding system, an encoder may include a coding engine to predictively code input video, a decoder to reconstruct reference pictures generated by the coding engine, a reference picture cache to store the reconstructed reference pictures, a patch cache to store prediction patches generated from other sources, and a prediction search unit to search among the reference picture cache and the patch cache to generate prediction references for use by the coding engine while coding input video. The prediction patches may be assembled from a variety of sources including: predefined image content, reference pictures being evicted from the reference picture cache, image content of prior coding sessions and image data stored by applications on a common terminal where the encoder resides. A decoder may store prediction patches in its own patch cache for synchronous decoding. | 08-29-2013 |
20130223526 | IMAGE DECODING METHOD, IMAGE CODING METHOD, IMAGE DECODING DEVICE, IMAGE CODING DEVICE, AND RECORDING MEDIUM - A method for decoding an image divided into plural blocks includes acquiring decoding information of a decoded block in a decoding target image from a storage unit that stores the decoding information of the decoded block and decoding information of blocks in plural decoded images; selecting a decoded image from the plural decoded images; acquiring decoding information of a corresponding block in the selected decoded image from the storage unit; predicting a division mode, which indicates a division shape of a decoding target block, by using the acquired decoding information of the decoded block and the acquired decoding information of the corresponding block; decoding division mode information, which indicates the division mode of the decoding target block based on coded data, and determining the division mode of the decoding target block based on the predicted division mode and the decoded division mode information. | 08-29-2013 |
20130223527 | SWITCH-SELECT SINGLE FRAME REFERENCE - Coding techniques for a video image compression system involve improving an image quality of a sequence of two or more bi-directionally predicted intermediate frames, where each of the frames includes multiple pixels. One method involves determining a brightness value of at least one pixel of each bi-directionally predicted intermediate frame in the sequence as an equal average of brightness values of pixels in non-bidirectionally predicted frames bracketing the sequence of bi-directionally predicted intermediate frames. The brightness values of the pixels in at least one of the non-bidirectionally predicted frames is converted from a non-linear representation. | 08-29-2013 |
20130223528 | METHOD AND APPARATUS FOR PARALLEL ENTROPY ENCODING/DECODING - The present invention relates to an entropy encoding method comprising the following steps: updating probability information using the update information derived based on a bit stream received from an encoder; deriving a bin corresponding to the current codeword based on the updated probability information; and performing the inverse binarization of the derived bin to acquire a syntax element. According to the present invention, video-encoding/decoding efficiency may be improved. | 08-29-2013 |
20130223529 | Scalable Video Encoding Using a Hierarchical Epitome - A method and apparatus are provided for encoding an image sequence and outputting a signal having a layered organization with at least a base layer and an enhancement layer. For at least one current image of the sequence, the method includes constructing a hierarchical epitome associated with the enhancement layer corresponding to a maximum resolution level of the current image, using: an epitome associated with the enhancement layer corresponding to the maximum resolution level of the current image; and at least one epitome associated with a preceding layer corresponding to a resolution level lower than the maximum resolution level of the current image. | 08-29-2013 |
20130230100 | VIDEO ENCODING DEVICE AND PROGRAM, VIDEO DECODING DEVICE AND PROGRAM, AND VIDEO DISTRIBUTION SYSTEM - The present invention relates to a video distribution system including a video encoding device which generates video data encoded per a unit of frame and a video decoding device which decodes the video data supplied from the video encoding device. The video encoding device includes a predicted image generator which generates a predicted image of a non-key frame, by using a key frame, an updated original image generator which compares each parameter representing a predicted image of the non-key frame with respective parameter values for each parameter representing an original image of the non-key frame, and according to this comparison result, generates an updated original image by selecting parameter values of either the predicted image or the original image for each parameter, and an error correction code generator which generates an error correction code for correcting an error of the updated original image to the non-key frame. | 09-05-2013 |
20130230101 | METHODS FOR ENCODING AND DECODING AN IMAGE, AND CORRESPONDING DEVICES - A video sequence comprises at least one frame comprising a plurality of blocks of pixels. A method for encoding the video sequence includes the steps of:
| 09-05-2013 |
20130230102 | METHODS FOR ENCODING AND DECODING AN IMAGE, AND CORRESPONDING DEVICES - A method for encoding at least one block of pixels, includes the steps of:
| 09-05-2013 |
20130230103 | METHOD FOR ENCODING AND DECODING IMAGES, AND DEVICE USING SAME - According to the present invention, an inter-prediction method includes: receiving mode information on the inter-prediction of a current block; decoding the received mode information; and performing inter-prediction using the decoded mode information. According to the present invention, image compression efficiency may be improved. | 09-05-2013 |
20130230104 | METHOD AND APPARATUS FOR ENCODING/DECODING IMAGES USING THE EFFECTIVE SELECTION OF AN INTRA-PREDICTION MODE GROUP - A video encoding/decoding method and apparatus select a prediction mode set based on neighboring pixels and, in some embodiments, obviate the need to encode additional information for selecting a prediction mode set and thereby improve the performance of compression. | 09-05-2013 |
20130230105 | INTRA-PREDICTION ENCODING/DECODING APPARATUS AND METHOD FOR OMITTING THE TRANSMISSION OF PREDICTION MODE INFORMATION USING CHARACTERISTICS OF REFERENCE PIXELS - An intra-prediction encoding/decoding apparatus and method is provided that omits transmission of prediction mode information using characteristics of reference pixels. The present disclosure provides an intra-prediction encoding apparatus and method for omitting transmission of additional information of a predicted mode of the current block through the use of characteristics of reference pixels adjacent to a current block and thereby reducing overhead when a bitstream is generated, and improving the efficiency of encoding and decoding an image while maintaining the accuracy of intra-predictions. | 09-05-2013 |
20130235931 | MASKING VIDEO ARTIFACTS WITH COMFORT NOISE - A system and method is presented to mask artifacts with content-adaptive comfort noise. Encoder side analysis may determine initial comfort noise characteristics. Noise parameters may then be developed for each frame or sequence of frames that define comfort noise patches that mask the artifacts. At the decoder, a comfort noise patch can be fetched from memory or created based on the amplitude and spatial characteristics of the comfort noise specified in the noise parameters. The noise patch may additionally be scaled or otherwise adjusted to accommodate the capabilities and/or limitations of the specific decoder. | 09-12-2013 |
20130235932 | SKIP MACROBLOCK CODING - Various techniques and tools for encoding and decoding (e.g., in a video encoder/decoder) binary information (e.g., skipped macroblock information) are described. In some embodiments, the binary information is arranged in a bit plane, and the bit plane is coded at the picture/frame layer. The encoder and decoder process the binary information and, in some embodiments, switch coding modes. For example, the encoder and decoder use normal, row-skip, column-skip, or differential modes, or other and/or additional modes. In some embodiments, the encoder and decoder define a skipped macroblock as a predicted macroblock whose motion is equal to its causally predicted motion and which has zero residual error. In some embodiments, the encoder and decoder use a raw coding mode to allow for low-latency applications. | 09-12-2013 |
20130235933 | IMAGE CODING METHOD, IMAGE DECODING METHOD, IMAGE CODING APPARATUS, IMAGE DECODING APPARATUS, PROGRAM, AND INTEGRATED CIRUIT - An image coding method includes: obtaining first information and second information from a current signal to be coded, the first information identifying at least one reference picture list used in inter prediction of an image out of a plurality of reference picture lists, the second information identifying at least one reference picture used in the inter prediction of the image out of reference pictures included in the at least one reference picture list identified by the first information; mixing the first information and the second information to generate a mixed signal; selecting a variable-length coding table according to a maximum variation range of the mixed signal; and variable-length coding the mixed signal using the selected variable-length coding table. | 09-12-2013 |
20130243085 | METHOD OF MULTI-VIEW VIDEO CODING AND DECODING BASED ON LOCAL ILLUMINATION AND CONTRAST COMPENSATION OF REFERENCE FRAMES WITHOUT EXTRA BITRATE OVERHEAD - Provided is an illumination and contrast compensation method applied to the frames comprising multi-view video sequence. Relations between the values of the pixels of the reference block and the values of the pixels neighboring the reference block and relations between the restored values of the pixels neighboring the current block and the values of the pixels neighboring the reference block is determined. An illumination and contrast compensation parameters for illumination and contrast compensation of discrepancy (mismatch) compensation between reference and encoded blocks is determined on the basis of the determined relations, values of the pixels of the reference block, restored values of the pixels neighboring the current block and values of the pixels neighboring the reference block. | 09-19-2013 |
20130243086 | WIRELESS TRANSMISSION TERMINAL AND WIRELESS TRANSMISSION METHOD, ENCODER AND ENCODING METHOD THEREFOR, AND COMPUTER PROGRAMS - A wireless moving image transmission terminal for encoding and wirelessly transmitting data comprises a moving image acquisition unit for acquiring data to be reproduced in time sequence, an encoder for encoding the data acquired in the moving image acquisition unit by inter-frame predictive encoding in units of frame and generating encoded data, a wireless transmission/reception unit for wirelessly transmitting the encoded data, a wireless state determination unit for determining a wireless state of the wireless transmission/reception unit, and when determining that the wireless state is deteriorated, interrupting transmission of the encoded data by the wireless transmission/reception unit, and a referenced frame designation unit for, when the wireless state determination unit interrupts transmission of the encoded data by the wireless transmission/reception unit , designating a referenced frame for inter-frame predictive encoding in the encoder. | 09-19-2013 |
20130243087 | INTRA PREDICTION MODE ENCODING/DECODING METHOD AND APPARATUS FOR SAME - An intra prediction method according to the present invention comprises the following steps: deriving neighboring prediction mode information from a left neighboring prediction mode and a top neighboring prediction mode; deriving an intra prediction mode for a target unit to be decoded, using the derived neighboring prediction mode information; and performing intra prediction for the target unit to be decoded, based on the intra prediction mode. According to the present invention, video encoding/decoding efficiency may be improved. | 09-19-2013 |
20130243088 | METHOD AND APPARATUS FOR INTER PREDICTION - An inter prediction method according to the present invention comprises: a step for deriving reference motion information related to a unit to be decoded in a current picture; and a step for performing motion compensation for the unit to be decoded, using the reference motion information that has been derived. According to the present invention, image encoding/decoding efficiency can be enhanced. | 09-19-2013 |
20130243089 | DEVICE FOR ENCODING ULTRA-HIGH DEFINITION IMAGE AND METHOD THEREOF, AND DECODING DEVICE AND METHOD THEREOF - Provided are an encoding device using predictive coding in a screen and a method thereof, and a decoding device and a method thereof. The encoding device is capable of generating a prediction block of a current block according to one of methods for generating a plurality of predetermined prediction blocks, and outputting at least one of encoding information and differential blocks as bitstream by entropy encoding according to whether differential blocks are encoded or not. | 09-19-2013 |
20130251034 | METHODS AND APPARATUS FOR ILLUMINATION AND COLOR COMPENSATION FOR MULTI-VIEW VIDEO CODING - There are provided a method and apparatus for illumination and color compensation for multi-view video coding. A video encoder includes an encoder for encoding a picture by enabling color compensation of at least one color component in a prediction of the picture based upon a correlation factor relating to color data between the picture and another picture. The picture and the other picture have different view points and both corresponding to multi-view content for a same or similar scene. | 09-26-2013 |
20130251035 | METHOD AND APPARATUS FOR ENCODING VIDEO BY MOTION PREDICTION USING ARBITRARY PARTITION, AND METHOD AND APPARATUS FOR DECODING VIDEO BY MOTION PREDICTION USING ARBITRARY PARTITION - An encoding method including: receiving and parsing a bitstream of an encoded image, determining coding units having a hierarchical structure being data units in which the encoded image is decoded, and sub-units for predicting the coding units, by using information that indicates division shapes of the coding units and information about prediction units of the coding units, parsed from the received bitstream, wherein the sub-units comprise partitions obtained by splitting at least one of a height and a width of the coding units according to at least one of a symmetric ratio and an asymmetric ratio, and reconstructing the image by performing decoding including motion compensation using the partitions for the coding units, using the encoding information parsed from received bitstream, wherein the coding units having the hierarchical structure comprise coding units of coded depths split hierarchically according to the coded depths and independently from neighboring coding units. | 09-26-2013 |
20130251036 | INTRA PREDICTION METHOD AND APPARATUS - An intra prediction method according to the present invention comprises the following steps: performing a directional prediction using at least one of a neighboring pixel of a current block and a left upper corner pixel positioned at a left upper corner of the current block so as to obtain a first prediction value for the current block; obtaining a second prediction value for the current block using the reference sample positioned in the current block; and weighted summing the first prediction value and the second prediction value using a weighting matrix so as to obtain a final prediction value for the current block. According to the present invention, image encoding/decoding efficiency may be improved. | 09-26-2013 |
20130259123 | SYSTEM AND METHOD FOR IDENTIFYING UNIQUE PORTIONS OF VIDEOS WITH VALIDATION AND PREDICTIVE SCENE CHANGES - A computer-based method for generating a compressed data stream, including using a specially programmed computer to: access a first compressed data stream including a first plurality of sequentially arranged frames including respective compressed frame data; access a second compressed data stream including a second plurality of sequentially arranged frames including respective compressed frame data; compare respective compressed data for sequentially matched pairs of frames in the first and second pluralities of frames; select, based on the comparison, common and unique portions in the first data stream; and select, based on the comparison, first and second portions in the second data stream, matched with the common and unique portions, respectively, in the sequence. The first portion has respective compressed frame data equal to the respective compressed frame data for the common portion. The second portion has respective compressed frame data unequal to the respective compressed frame data for the common portion. | 10-03-2013 |
20130259124 | IMAGE CODING METHOD, IMAGE DECODING METHOD, IMAGE CODING APPARATUS, AND IMAGE DECODING APPARATUS - With an image coding method, when performing arithmetic coding on parameters corresponding to a current coefficient to be coded, a related parameter which is a parameter related to a value to be referred to for selecting a context is arithmetically coded per coefficient among the parameters corresponding to the coefficient, and unrelated parameters which are parameters unrelated to a value to be referred to for selecting the context are collectively arithmetically coded per coefficient subset among the parameters corresponding to the coefficients in the coefficient subset. | 10-03-2013 |
20130259125 | METHODS AND APPARATUS FOR ILLUMINATION AND COLOR COMPENSATION FOR MULTI-VIEW VIDEO CODING - There are provided a method and apparatus for illumination and color compensation for multi-view video coding. A video encoder includes an encoder for encoding a picture by enabling color compensation of at least one color component in a prediction of the picture based upon a correlation factor relating to color data between the picture and another picture. The picture and the other picture have different view points and both corresponding to multi-view content for a same or similar scene. | 10-03-2013 |
20130259126 | METHOD AND APPARATUS FOR VIDEO ENCODING/DECODING OF ENCODING/DECODING BLOCK FILTER INFORMATION ON THE BASIS OF A QUADTREE - In a video encoding and/or decoding apparatus and/or method, a video encoder partitions a reference image predicted block-wise with at least a filter into blocks in at least one layer, sets a partitioning flag to indicate whether each of the partitioned blocks is subdividable into sub-blocks, sets a filter type to indicate which filter was used for interpolating each of the blocks or sub-blocks, and quadtree-encodes the partitioning flag and the filter type together with the corresponding block or sub-block to generate a quadtree-encoded bitstream. A video decoder reads the partitioning flags and the filter types from the quadtree-encoded bitstream to reconstruct the partitioning flags and the filter types for the corresponding blocks or sub-blocks, generates the blocks or sub-blocks based on the corresponding partitioning flags, and interpolates the generated blocks or sub-blocks on the basis of the corresponding filter types to reconstruct the reference image. | 10-03-2013 |
20130259127 | METHOD AND APPARATUS FOR ENCODING VIDEO, AND METHOD AND APPARATUS FOR DECODING VIDEO - Disclosed is a method of encoding a video, the method including: splitting a current picture into at least one maximum coding unit; determining a coded depth to output a final encoding result according to at least one split region obtained by splitting a region of the maximum coding unit according to depths, by encoding the at least one split region, based on a depth that deepens in proportion to the number of times the region of the maximum coding unit is split; and outputting image data constituting the final encoding result according to the at least one split region, and encoding information about the coded depth and a prediction mode, according to the at least one maximum coding unit. | 10-03-2013 |
20130259128 | METHOD AND APPARATUS FOR ENCODING/DECODING IMAGES TO MINIMIZE REDUNDANCY OF INTRA-PREDICTION MODE - A video encoding apparatus encodes intra-prediction mode information of the current block by excluding information on overlapping or unnecessary intra-prediction modes from a candidate mode group and/or based on whether predicted values of intra-prediction modes of at least a preset number of subblocks are matched with actual intra-prediction modes. | 10-03-2013 |
20130259129 | IMAGE PROCESSING DEVICE AND METHOD - The present disclosure relates an image processing device and method enabling merging blocks in the temporal direction in motion compensation. Provided is an image processing device including a determining unit configured to determine whether or not motion information of a current block which is to be processed, and motion information of a co-located block situated in the temporal periphery of the current block, match, and a merge information generating unit configured to, in the event that determination is made by the determining unit that these match, generate temporal merge information specifying the co-located block as a block with which the current block is to be temporally merged. | 10-03-2013 |
20130266063 | VIDEO ENCODING METHOD AND APPARATUS FOR FAST INTRA PREDICTION - An image encoding method in an image encoding apparatus is provided. An image encoding apparatus calculates an SATD (Sum of Absolute Transform Difference)-based encoding expense of each of a plurality of intra prediction modes for a current prediction unit. The image encoding apparatus determines at least one or more first candidate encoding modes for the current prediction unit based on the SATD-based encoding expense. The image encoding apparatus determines a final encoding mode among the first candidate encoding modes. | 10-10-2013 |
20130266064 | Method and Apparatus for Intra Mode Coding in HEVC - A method and apparatus for Intra prediction mode encoding or decoding based on multi-level most probable modes (MPMs) are disclosed. In one embodiment according to the present invention, the method and apparatus for encoding or decoding Intra prediction mode for 4×4 prediction unit (PU) use 19 Intra mode candidates to have full directional coverage or 35 Intra mode candidates as used by 8×8, 16×16 and 32×32 PUs. In another embodiment of the present invention, three MPMs are used to code the Intra modes. Various methods to derive the three MPMs based on the Intra modes of neighboring blocks are disclosed. In yet another embodiment of the present invention, the coding method for the remaining modes comprises fixed length coding. In addition, variable length coding for the remaining modes are also disclosed. | 10-10-2013 |
20130266065 | CODING AND DECODING OF MULTIVIEW VIDEOS - The present invention relates to a method for coding a multiview video stream ( | 10-10-2013 |
20130266066 | LOW-RESOLUTION VIDEO CODING CONTENT EXTRACTION - Low complexity method embodiments directly decode low-resolution frames from compressed high-resolution videos that were encoded using predictive coding techniques like the H.264 video coding standard. The smaller the decoding resolution, the higher will be the computation and power savings of using the method. Low-frequency coefficients of 2D transformed predictions are added to the low-frequency coefficients of the transformed residual error. Low-frequency coefficients of the reconstructed data are then inverse transformed taking a smaller size transform. Further savings are obtained by reconstructing only those reference pixels that will be needed for accurate decoding of further Intra blocks. | 10-10-2013 |
20130266067 | METHOD AND DEVICE FOR ENCODING/DECODING IMAGE BY INTER PREDICTION USING RANDOM BLOCK - A video encoding apparatus, a video decoding apparatus and method of encoding and decoding one or more images using various shapes of blocks. The video encoding apparatus is configured to determine a partition form, among candidate partition forms, for partitioning a current block into one or more partition blocks; generate one or more predicted blocks by performing a motion compensation with a scale factor applied to the one or more partition blocks; generate a residual block by subtracting the predicted blocks from the corresponding one or more partition blocks; generate at least one transform block by transforming the residual block; generate at least one quantized transform block by quantizing the at least one transform block; and encode the at least one quantized transform block, information on the determined partition form, and the scale factor into a bitstream. | 10-10-2013 |
20130266068 | APPARATUS AND METHOD FOR ENCODING AND DECODING MOVING PICTURE USING ADAPTIVE SCANNING - Provided is an apparatus and method for encoding/decoding a moving picture based on adaptive scanning. The moving picture apparatus and method can increase a compression rate based on adaptive scanning by performing intra prediction onto blocks of a predetermined size, and scanning coefficients acquired from Discrete Cosine Transform (DCT) of a residue signal and quantization differently according to the intra prediction mode. The moving picture encoding apparatus includes: a mode selector for selecting and outputting a prediction mode; a predictor for predicting pixel values of pixels to be encoded of an input video based on the prediction mode to thereby output a residue signal block; a transform/quantization unit for performing DCT onto the residue signal block and quantizing the transformed residue signal block; and an encoder for adaptively scanning and encoding the quantized residue signal block based on the prediction mode. | 10-10-2013 |
20130272394 | Graphical Application Integration with MPEG Objects - System and methods are provided to cache encoded graphical objects that may be subsequently combined with other encoded video data to form a data stream decodable by a client device according to a format specification. Paint instructions relating to a graphical object are sent from a layout engine to a rendering library. A shim intercepts these instructions and determines whether the graphical object already has been rendered and encoded. If so, a cached copy of the object is transmitted to the client device. If not, the shim transparently passes the instructions to the rendering library, and the object is rendered, encoded, and cached. Hash values are used for efficiency. Methods are disclosed to detect and cache animations, and to cut and splice cached objects into encoded video data. | 10-17-2013 |
20130272395 | IMAGE ENCODER AND DECODER USING UNDIRECTIONAL PREDICTION - The present invention relates to an image encoding and decoding technique, and more particularly, to an image encoder and decoder using unidirectional prediction. The image encoder includes a dividing unit to divide a macro block into a plurality of sub-blocks, a unidirectional application determining unit to determine whether an identical prediction mode is applied to each of the plurality of sub-blocks, and a prediction mode determining unit to determine a prediction mode with respect to each of the plurality of sub-blocks based on a determined result of the unidirectional application determining unit. | 10-17-2013 |
20130272396 | LM Mode with Uniform Bit-Width Multipliers - A video codec comprising a processor configured to generate a predicted chroma sample for a chroma block based on a plurality of reconstructed luma samples located in neighboring blocks of a corresponding reconstructed luma block and adjacent to the corresponding reconstructed luma block, and a plurality of reconstructed chroma samples located in neighboring blocks of the chroma block and adjacent to the chroma block, wherein generating the predicted chroma sample comprises computing a plurality of multipliers, wherein each of the plurality of multipliers has a bit width no greater than an input bit depth of the chroma block, and wherein generating the predicted chroma sample does not require any multiplier that has a bit width greater than the input bit depth of the chroma block. | 10-17-2013 |
20130272397 | IMAGE PROCESSING APPARATUS AND METHOD, AND PROGRAM - An image processing apparatus, a method, and a program that enable an amount of code to be suppressed below a desired value with more reliability. An emergency mode determining section determines that the amount of code of a next picture is likely to exceed an upper limit if a target bit calculated by a rate controlling section exceeds a predetermined upper limit. If it is determined that the amount of code of the next picture is likely to exceed the upper limit, the code amount controlling section controls an orthogonal transducing section to replace a transform coefficient of a predetermined frequency component with zero, controls an intra predicting section to restrict intra prediction modes to be applied, and controls a mode determining section to restrict inter prediction modes to be applied. The prevent invention can be applied to an encoding apparatus. | 10-17-2013 |
20130272398 | LONG TERM PICTURE SIGNALING - A system for decoding a video bitstream includes receiving a coded picture of the video and receiving a slice header including a least significant bits of picture order count and a delta picture order count most significant bits cycle corresponding to a respective picture. The system discriminates between whether the delta picture order count most significant bits cycle is signaling (a) no presence of a cycle corresponding to the delta picture order count most significant bits, and (b) yes presence of the cycle corresponding to the delta picture order count most significant bits. | 10-17-2013 |
20130272399 | MOVING PICTURE CODING METHOD, MOVING PICTURE DECODING METHOD, MOVING PICTURE CODING APPARATUS, MOVING PICTURE DECODING APPARATUS, AND MOVING PICTURE CODING AND DECODING APPARATUS - A moving picture coding method includes (i) transforming, for each of one or more second processing units included in the first processing unit, a moving picture signal in a spatial domain into a frequency domain coefficient and quantizing the frequency domain coefficient, and (ii) performing arithmetic coding on a luminance CBF flag indicating whether or not a quantized coefficient is included in the second processing unit in which transform and quantization are performed, wherein, in the arithmetic coding, a probability table for use in arithmetic coding is determined according to whether or not the size of the first processing unit is identical to the size of the second processing unit and whether or not the second processing unit has a predetermined maximum size. | 10-17-2013 |
20130272400 | METHODS AND DEVICES FOR ENCODING AND DECODING AT LEAST ONE IMAGE IMPLEMENTING A SELECTION OF PIXELS TO BE PREDICTED, AND CORRESPONDING COMPUTER PROGRAM - A method is provided for decoding a signal that represents at least one image. The method implements at least one iteration of the following steps, for at least one block of the image to be decoded: determining at least one selection parameter from at least one characteristic associated with at least one reference pixel of a reference region of the image, the reference region including at least one previously encoded/decoded block and/or at least one pixel predicted in a preceding iteration; selecting at least one pixel to be predicted in the block to be decoded from the at least one selection parameter; and for at least one selected pixel to be predicted, referred to as an anchor pixel, predicting the anchor pixel from at least one reference pixel, thereby outputting a predicted pixel. | 10-17-2013 |
20130272401 | METHOD AND DEVICE FOR ENCODING INTRA PREDICTION MODE FOR IMAGE PREDICTION UNIT, AND METHOD AND DEVICE FOR DECODING INTRA PREDICTION MODE FOR IMAGE PREDICTION UNIT - Methods and apparatuses for encoding and decoding an intra prediction mode of a prediction unit of a chrominance component based on an intra prediction mode of a prediction unit of a luminance component are provided. When an intra prediction mode of a prediction unit of a luminance component is the same as an intra prediction mode in an intra prediction mode candidate group of a prediction unit of a chrominance component, reconstructing the intra prediction mode candidate group of the prediction unit of the chrominance component by excluding or replacing an intra prediction mode of the prediction unit of the chrominance component which is same as an intra prediction mode of the prediction unit of the luminance component from the intra prediction mode candidate group, and encoding the intra prediction mode of the prediction unit of the chrominance component by using the reconstructed intra prediction mode candidate group. | 10-17-2013 |
20130279575 | MARKING REFERENCE PICTURES IN VIDEO SEQUENCES HAVING BROKEN LINK PICTURES - Systems, methods, and devices for processing video data are disclosed. Some examples determine that a current picture is a broken-link access (BLA) picture. These examples may also mark a reference picture in a picture storage buffer as unused for reference. In some examples, this may be done prior to decoding the BLA picture. | 10-24-2013 |
20130279576 | VIEW DEPENDENCY IN MULTI-VIEW CODING AND 3D CODING - This disclosure described techniques for coding layer dependencies for a block of video data. According to these techniques, a video encoder generates layer dependencies associated with a given layer. The video encoder also generates a type of prediction associated with one or more of the layer dependencies. In some examples, the video encoder generates a first syntax element to signal layer dependencies and a second syntax element to signal a type of prediction associated with one or more of the layer dependencies. A video decoder may obtain the layer dependencies associated with a given layer and the type of prediction associated with one or more of the layer dependencies. | 10-24-2013 |
20130279577 | PICTURE CODING SUPPORTING BLOCK MERGING AND SKIP MODE - A coding efficiency increase is achieved by using a common signalization within the bitstream with regard to activation of merging and activation of the skip mode. One possible state of one or more syntax elements within the bitstream may signalize for a current sample set of a picture that the sample set is to be merged and has no prediction residual encoded and inserted into the bitstream. A common flag may signalize whether the coding parameters associated with a current sample set are to be set according to a merge candidate or to be retrieved from the bitstream, and whether the current sample set of the picture is to be reconstructed based on a prediction signal depending on the coding parameters associated with the current sample set, without any residual data, or to be reconstructed by refining the prediction signal depending on the coding parameters associated with the current sample set by means of residual data within the bitstream. | 10-24-2013 |
20130279578 | MOVING IMAGE CODING APPARATUS AND MOVING IMAGE DECODING APPARATUS - An apparatus to decode an encoded bit stream obtained by dividing the moving image into a plurality of rectangular regions includes a rectangular region size determination unit for determining a variable size of the regions in a sequence (a set of continuous frames) based on region size information multiplexed in the encoded bit stream. The apparatus includes a decoding unit for decoding coding mode information multiplexed in the encoded bit stream for each of the regions, and a decoding unit for decoding pixel values in each of the regions based on the coding mode information. The coding mode information includes (1) prediction type information selected from information indicating either inter or intra prediction coding, and (2) intra prediction block size information indicating a size of a unit region for the intra prediction coding indicated by the prediction type information. | 10-24-2013 |
20130279579 | VIDEO-INFORMATION ENCODING METHOD AND VIDEO-INFORMATION DECODING METHOD - A video-information encoding apparatus and decoding apparatus with a guarantee of a fixed processing time. By limiting the amount of data to be input into/output from a CABAC encoding unit and decoding unit on a unit-of-encoding basis, such as one picture, slice, macroblock or block, and by encoding uncompressed video data, it is possible to provide a video-information encoding apparatus and decoding apparatus with a guarantee of a fixed processing time. Thereby, an apparatus with a guarantee of the processing time can be mounted. | 10-24-2013 |
20130279580 | METHOD AND APPARATUS FOR ENCODING AND DECODING IMAGE BY USING ROTATIONAL TRANSFORM - An image encoding method includes generating a first frequency coefficient matrix by transforming a predetermined block to a frequency domain; determining whether the first frequency coefficient matrix includes coefficients whose absolute values are greater than a predetermined value; generating a second frequency coefficient matrix by selectively partially switching at least one of rows and columns of the first frequency coefficient matrix according to an angle parameter based on a determination result; and selectively encoding the second frequency coefficient matrix based on the determination result. | 10-24-2013 |
20130279581 | MOTION ESTIMATION METHODS FOR RESIDUAL PREDICTION - Systems, apparatus and methods are described including determining a first value by reducing a bit-length of a reference pixel value and adding a first predetermined value to the result and determining a second value by subtracting a residual pixel value from a current pixel value to generate a difference value, reducing a bit-length of the difference value and adding the first predetermined value to the result. The range of the second value may then be clipped by setting the second value to zero when the second value is equal to or less than a second predetermined value and setting the second value to a third predetermined value when the second value is equal to or greater than a fourth predetermined value. The first value and the second value may then be used for inter-layer residual prediction in Scalable Video Coding (SVC) systems. | 10-24-2013 |
20130279582 | MOVING IMAGE ENCODING DEVICE, MOVING IMAGE DECODING DEVICE, MOVING IMAGE ENCODING METHOD AND MOVING IMAGE DECODING METHOD - When a coding mode selected by an encoding controlling part | 10-24-2013 |
20130287101 | METHOD AND DEVICE FOR ENCODING A VIDEO FRAME, METHOD AND DEVICE FOR DECODING A VIDEO FRAME AND STORAGE MEDIUM - A method and a device are described for modifying a video frame for encoding or decoding wherein values of pixels of the video frame are represented an increased bit depth. | 10-31-2013 |
20130287102 | VIDEO IMAGE ENCODING DEVICE, VIDEO IMAGE ENCODING METHOD, VIDEO IMAGE DECODING DEVICE, AND VIDEO IMAGE DECODING METHOD - A method including determining a group to which each of the plurality of blocks belongs, the plurality of blocks being obtained by dividing each picture included in video image data; adding, to an output stream, group information expressing information of the group; calculating a decode time for each of the groups; determining a decode delay for each of the groups; adding, to the output stream, a delay time of each of the groups; controlling an encode amount so that data used for decoding all of the blocks included in one of the groups arrives at a receiving buffer of a decoding device by a time expressed by the delay time; and performing encoding based on the encode amount controlled at the controlling. | 10-31-2013 |
20130287103 | QUANTIZATION PARAMETER (QP) CODING IN VIDEO CODING - A method of coding delta quantization parameter values is described. In one example a video decoder may receive a delta quantization parameter (dQP) value for a current quantization block of video data, wherein the dQP value is received whether or not there are non-zero transform coefficients in the current quantization block. In another example, a video decoder may receive the dQP value for the current quantization block of video data only in the case that the QP Predictor for the current quantization block has a value of zero, and infer the dQP value to be zero in the case that the QP Predictor for the current quantization block has a non-zero value, and there are no non-zero transform coefficients in the current quantization block. | 10-31-2013 |
20130287104 | METHOD FOR ENCODING VIDEO INFORMATION AND METHOD FOR DECODING VIDEO INFORMATION, AND APPARATUS USING SAME - Disclosed herein is a method for coding image information, including: generating prediction information by predicting information on a current coding unit; and determining whether the information on the current coding unit is the same as the prediction information, wherein when the information on the current coding unit is the same as the prediction information, a flag indicating that the information on the current coding unit is the same as the prediction information is coded and transmitted, and when the information on the current coding unit is not the same as the prediction information, the flag indicating that the information on the current coding unit is not the same as the prediction information and the information on the current coding unit are coded and transmitted. | 10-31-2013 |
20130287105 | IMAGE CODING DEVICE AND IMAGE DECODING DEVICE - In terms of the transmission of the coding method, it is ensured to decode information coded according to the intra-frame prediction coding with vector information. An error of a piece of divisional image information targeted for image prediction coding and a piece of predicted information is determined to perform prediction coding. A data stream in which a piece of information for identifying a prediction method and a piece of information subjected to prediction coding according to the method are arranged is produced according to the process sequence of the prediction coding for each process on the divisional image information. At this time, the data stream has a pair of vector information and the error information as information subjected to prediction coding for each process on the divisional image information on condition that the prediction method is intra-frame prediction coding with vectors. | 10-31-2013 |
20130287106 | VIDEO PREDICTION METHOD CAPABLE OF PERFORMING BILATERAL PREDICTION AND UNILATERAL PREDICTION AND A DEVICE THEREOF, VIDEO ENCODING METHOD AND DEVICE THEREOF, AND VIDEO DECODING METHOD AND DEVICE THEREOF - A method and a device for performing inter prediction of a video, and encoding and decoding a video using an inter prediction, are provided. A video prediction method includes: determining reference information indicating at least one reference image for inter predicting an image; determining a first reference list and a second reference list, each of which includes the determined reference information and a reference order of the at least one reference image; and if the determined reference information indicates only images for uni-directional prediction, generating a reconstructed image by referring to images indicated by the first and second lists in a same reference order. | 10-31-2013 |
20130287107 | IMAGE CODING APPARATUS, IMAGE CODING METHOD AND PROGRAM, IMAGE DECODING APPARATUS, AND IMAGE DECODING METHOD AND PROGRAM - An image coding method according to one aspect includes dividing an input image into processing target block(s), determining a mode of an intra-picture prediction of the processing target block in units of the divided processing target block(s), holding the prediction mode into a holding unit, estimating the intra prediction mode of the processing target block, comparing the result of the prediction mode determination and the result of the prediction mode estimation to determine whether they match each other, coding the result of the comparison, and further, when the result of the comparison indicates a mismatch, coding the result of the prediction mode determination. An intra prediction mode of one or more predetermined processing units surrounding the processing target block from the holding unit is acquired and compared, and the coding is controlled based on the result of the mode comparison. | 10-31-2013 |
20130294507 | ADAPTIVE SCAN DEVICE AND METHOD FOR SCANNING THEREOF - The present disclosure relates to an adaptive scan apparatus and a method for scanning thereof. The adaptive scan apparatus includes a zero coefficient counter and a scan pattern updater. The scan pattern updater is configured to generate a zero counter corresponding to a prediction mode of a neighboring block of a current block and to update the zero counter corresponding to a position where a coefficient value of the current block is 0 for transformed and quantized data. And the scan pattern updater is configured to update a scan pattern by sequentially arranging generated zero counters updated for the current block from a position of a small value to a position of a large value. | 11-07-2013 |
20130294508 | METHOD AND DEVICE FOR ENCODING AND DECODING BY USING PARALLEL INTRAPREDICTION BY A CODING UNIT - A video encoding apparatus, a video decoding apparatus and method by using parallel intra-prediction by a coding unit-level are provided. The video encoding apparatus includes a left extrapolation pixel generating unit for generating left extrapolation pixels for a coding unit by using at least one of pixels of a top left block of the coding unit according to a direction of an intra-prediction mode with respect to the coding unit and leftmost original pixels of the coding unit; an intra-prediction encoding unit for predicting the coding unit by using neighboring pixels including the left extrapolation pixels to generate a first prediction block and encode the coding unit; and
| 11-07-2013 |
20130294509 | APPARATUS AND METHOD FOR ENCODING/DECODING ADDITIONAL INTRA-INFORMATION - The present disclosure provides an apparatus for encoding additional intra-information includes an intra prediction mode selecting unit for performing an intra prediction by applying at least one of one or more predetermined types of partitions and one or more prediction modes with respect to a coding unit, and for selecting at least one of a partition among the one or more types of partitions and a prediction mode among the one or more prediction modes; a partitioning and prediction mode table lookup unit for looking up a table, and for generating a table hit signal if the table has at least one of a partition corresponding to the selected partition and a prediction mode corresponding to the selected prediction mode; and an entropy encoding unit for performing an encoding based on the table, if the table hit signal is received. | 11-07-2013 |
20130294510 | VIDEO ENCODING DEVICE, VIDEO DECODING DEVICE, VIDEO ENCODING METHOD, VIDEO DECODING METHOD, AND PROGRAM - A video encoding device includes a planar prediction unit using planar prediction, and a noise injecting unit for injecting pseudo-random noise into a prediction image of a planar prediction block when a reconstructed prediction error value for planar prediction is less than a threshold determined by the size of the planar prediction block. The video encoding device then uses the pseudo-random noise in linear interpolation for calculating the prediction image, based on the conditions under which a gradient distortion occurs, to suppress the gradient distortion. | 11-07-2013 |
20130294511 | Methods and Devices for Intra Coding of Video - Encoder, decoder and methods for intra coding of video. The method in the decoder relates to decoding of an intra coded block IZ having a number N of neighboring blocks CU | 11-07-2013 |
20130301713 | SYSTEMS AND METHODS FOR INTRA PREDICTION VIDEO CODING - Systems and methods for intra prediction video coding are described herein. In one aspect, an apparatus includes a processor and a memory. The processor divides a video block into a plurality of video sub-blocks having a first size. The video block includes video units and has an intra prediction mode, and each video sub-block of the plurality of video sub-blocks includes at least a non-zero integer number of video units of the video block. The processor further determines prediction variables for a first video sub-block of the plurality of video sub-blocks based on the intra prediction mode of the video block and determines a predicted video unit for each video unit of the first video sub-block based on the intra prediction mode of the video block and the prediction variables for the first video sub-block. The memory stores the predicted video units. | 11-14-2013 |
20130301714 | METHOD AND APPARATUS FOR ENCODING/DECODING IMAGE FOR PERFORMING INTRAPREDICTION USING PIXEL VALUE FILTERED ACCORDING TO PREDICTION MODE - A video encoding apparatus, a video decoding apparatus and video decoding method are provided. The video decoding apparatus includes:
| 11-14-2013 |
20130301715 | PREDICTION METHOD IN CODING OR DECODING AND PREDICTOR - The present application provides a prediction method for use in an image block encoding or decoding process. The method includes obtaining availability information of reference blocks of a current image block, and determining whether the reference blocks are available according to the availability information, where the reference blocks of the current image block include a left side block, an upper side block, and an upper left block of the current image block; if at least one of the reference blocks is available, and at least one is unavailable, filling a pixel value in the available reference block to the unavailable reference block as a reference pixel value of the current image block; and predicting the current image block according to the reference pixel value. | 11-14-2013 |
20130301716 | Method and Device for Coding and Decoding Images - A method and a device for coding and decoding images are disclosed. The method for coding images includes: determining a second length according to a direction of a division line, a scale value, and a position parameter value; determining a division mode of the image block according to the direction of the division line, a first length, the second length, and the scale value; coding the image block according to the division mode of the image block; and coding a direction parameter value, the scale value, and the position parameter value. With the technical solution provided in the embodiments of the present invention, the determining of the division mode of the image block on the image coder is simplified. | 11-14-2013 |
20130301717 | INTRA PREDICTION METHOD AND APPARATUS, AND IMAGE ENCODING/DECODING METHOD AND APPARATUS USING SAME - The present disclosure relates to an intra prediction method and apparatus and an image encoding/decoding method and apparatus using the same. The disclosure provides the intra prediction apparatus that predicts the pixel values of respective pixels in a current block by weight-averaging the pixel values of one or more adjacent pixels in neighboring blocks to the current block according to the distances between each pixel in the current block and the adjacent pixel(s). According to the disclosure, the current block to be encoded can be predicted more accurately so that the encoding efficiency is improved by reducing the difference between the original block and the predicted block, and thereby video compression efficiency can be improved. | 11-14-2013 |
20130301718 | METHODS AND DEVICES FOR FORMING A PREDICTION VALUE - A method and device form a prediction value. A prediction direction is locally described by nonlinear trajectories. The prediction direction can be used in forming a prediction value to achieve a more accurate prediction determination. The method and device can be used in image compression or image-sequence compression. | 11-14-2013 |
20130301719 | MOVING PICTURE CODING METHOD AND MOVING PICTURE DECODING METHOD - A moving picture coding method includes: judging whether or not is to be performed on a coding target block; (b) judging, when the result of the judgment in step (a) is TRUE, whether or not the coding target block is a block that does not refer to at least part of intra predictors; (c) determining an intra predictor based on image information of the coding target block, when the result of the judgment in step (b) is TRUE; and (d) deriving a predictive image signal for the coding target block, using the intra predictor. | 11-14-2013 |
20130301720 | IMAGE ENCODING/DECODING METHOD AND APPARATUS FOR SAME - According to the present invention, an image encoding/decoding method comprises the steps of: performing an intra prediction on a current block so as to generate a prediction block; performing filtering on a filtering target pixel in the prediction block on the basis of the intra prediction mode of the current block so as to generate a final prediction block; and generating a reconstructed block on the basis of a reconstructed differential block corresponding to the current block and on the final prediction block. According to the present invention, image encoding/decoding efficiency can be improved. | 11-14-2013 |
20130301721 | MULTIVIEW IMAGE ENCODING METHOD, MULTIVIEW IMAGE DECODING METHOD, MULTIVIEW IMAGE ENCODING DEVICE, MULTIVIEW IMAGE DECODING DEVICE, AND PROGRAMS OF SAME - A multiview image encoding method includes, a view synthesis step for generating a view synthesis image at an encoding target view using a reference view image, a prediction image candidate generation step for generating plural intra prediction image candidates for each encoding target region using decoded images in already-encoded regions which are adjacent to the encoding target region, a prediction image candidate evaluation step for determining evaluation values of each intra prediction image candidates using the view synthesis image, a prediction image generation step for generating an intra prediction image from the plural intra prediction image candidates based on the evaluation values, and an image signal encoding step for performing a predictive encoding of an encoding target image in the encoding target regions using the intra prediction image. | 11-14-2013 |
20130308701 | VIDEO CODING WITH LARGE MACROBLOCKS - Techniques are described for encoding and decoding digital video data using macroblocks that are larger than the macroblocks prescribed by conventional video encoding and decoding standards. For example, the techniques include encoding and decoding a video stream using macroblocks comprising greater than 16×16 pixels. In one example, an apparatus includes a video encoder configured to encode a coded unit comprising a plurality of video blocks, wherein at least one of the plurality of video blocks comprises a size of more than 16×16 pixels and to generate syntax information for the coded unit that includes a maximum size value, wherein the maximum size value indicates a size of a largest one of the plurality of video blocks in the coded unit. The syntax information may also include a minimum size value. In this manner, the encoder may indicate to a decoder the proper syntax decoder to apply to the coded unit. | 11-21-2013 |
20130308702 | MOTION PICTURE ENCODING APPARATUS - Suppression of prediction error accumulating in an intra prediction is described. A motion picture encoding apparatus that performs encoding processing for each pixel block using a motion picture encoding method includes intra prediction processing for generating a prediction image using correlation of pixels therearound, and in the intra prediction processing, the motion picture encoding apparatus has processing for generating a quasi-prediction image from an input image, wherein when a prediction mode is determined, a weight is given to a pixel serving as a reference pixel in the intra prediction processing, and thus, the prediction mode is determined. When the weight is set at one or more, an error of a pixel serving as a reference pixel in a subsequent block is emphasized, and therefore, a prediction mode that is likely to propagate the error to the subsequent block is less likely to be selected. | 11-21-2013 |
20130315303 | METHOD AND APPARATUS FOR ENCODING VIDEO, AND METHOD AND APPARATUS FOR DECODING VIDEO - Disclosed are a method and a apparatus for encoding a video, and a method and apparatus for decoding a video, in which neighboring pixels used to perform intra prediction on a current block to be encoded are filtered and intra prediction is performed by using the filtered neighboring pixels. | 11-28-2013 |
20130315304 | METHOD FOR BINARIZING INTRA PREDICTION MODE AND METHOD, APPARATUS, AND SYSTEM FOR DECODING INTRA PREDICTION MODE - A method and an apparatus for binarizing an intra prediction mode are provided. The method includes: acquiring an intra prediction mode of a luma component; if the intra prediction mode of the luma component is one kind of prediction mode in M, modifying a value of a serial number of a prediction mode Luma Angle of a chroma component to I; sequencing all prediction modes of the chroma component according to a preset rule; and performing binarization on the modified Luma Angle, and sending the binarized Luma Angle to a decoding end. A method for coding an intra prediction mode and a method and an apparatus for decoding an intra prediction mode are further provided. According to the present invention, coding efficiency is improved. | 11-28-2013 |
20130315305 | IMAGE CODING METHOD, IMAGE DECODING METHOD, IMAGE CODING APPARATUS, IMAGE DECODING APPARATUS, AND IMAGE CODING-DECODING APPARATUS - An image coding method includes: generating a predicted block; calculating a residual block; calculating quantized coefficients by performing transform and quantization on the residual block; calculating a coded residual block by performing inverse quantization and inverse transform on the quantized coefficients; generating a temporary coded block; determining whether or not an offset process is required, to generate first flag information indicating a result of the determination; executing the offset process on the temporary coded block when it is determined that the offset process is required; and performing variable-length coding on the quantized coefficients and the first flag information. | 11-28-2013 |
20130315306 | Personal Video Recorder - A sequence of picture slices is encoded as reference slices and non-reference slices, wherein the reference slices include B slices, by forming, for each B slice, at least one data packet containing data values derived from brightness and color information pertaining to the slice. The data packet for each B slice includes a header element indicating whether the B slice is a reference slice. The header element of each reference B slice has a value that depends on depth of the reference B slice in a hierarchy of discardability. | 11-28-2013 |
20130315307 | PROCESSING AND REPRODUCTION OF FRAMES - A processor is configured to receive input data, divide an individual frame into blocks, compare the blocks with corresponding blocks of a first prediction frame for and identify changed blocks. In order to obtain an efficient solution for processing and reproducing frames, the processor is configured to include in generated intermediate data the blocks identified as changed blocks, and generate a change indicator indicating the positions in the individual frame of the identified changed blocks and identified unchanged blocks. | 11-28-2013 |
20130322529 | METHOD AND DEVICE FOR ENCODING AND DECODING A DIGITAL IMAGE SIGNAL - A method for encoding and decoding a digital image signal, and associated devices. A method for encoding a digital image signal represented by a set of digital samples includes applying a segmentor to a reference digital image signal to obtain subsets of digital samples and applying a same filter among a set of predetermined filters to each sample of a subset of digital samples. The method includes a step of selecting (S | 12-05-2013 |
20130322530 | ENCODING AND RECONSTRUCTION OF RESIDUAL DATA BASED ON SUPPORT INFORMATION - Decoder processor hardware reproduces a support plane including a set of support values. The set of support values is derived from combining a sequence of multiple original sets of values. The decoder processor hardware receives compensation information. The decoder processor hardware utilizes the compensation information to produce preliminary renditions of the multiple original sets of values based on the set of support values. Encoder processor hardware processes a sequence of original sets of values. The encoder processor hardware utilizes the values of the original sets in the sequence to produce a set of support values, the set of support values representing a baseline to reproduce a rendition of each of the original sets of values. The encoder processor hardware generates reconstruction data to include data corresponding to the set of support values, the reconstruction data indicates how to reconstruct the original sets of values using the set of support values. | 12-05-2013 |
20130322531 | EXTERNAL PICTURES IN VIDEO CODING - A video encoder generates a syntax element that indicates whether a video unit of a current picture is predicted from an external picture. The external picture is in a different layer than the current picture. Furthermore, the video encoder outputs a video data bitstream that includes a representation of the syntax element. The video data bitstream may or may not include a coded representation of the external picture. A video decoder obtains the syntax element from the video data bitstream. The video decoder uses the syntax element in a process to reconstruct video data of a portion of the video unit. | 12-05-2013 |
20130322532 | HIGH DYNAMIC RANGE CODECS - A method for encoding high dynamic range (HDR) images involves providing a lower dynamic range (LDR) image, generating a prediction function for estimating the values for pixels in the HDR image based on the values of corresponding pixels in the LDR image, and obtaining a residual frame based on differences between the pixel values of the HDR image and estimated pixel values. The LDR image, prediction function and residual frame can all be encoded in data from which either the LDR image of HDR image can be recreated. | 12-05-2013 |
20130322533 | ENCODING DEVICE - A coding device that achieves reduction in a circuit size and in the number of processing cycles is obtained. A coding device includes a first arithmetic unit that calculates a first difference value between an input image and a predicted image with respect to each of blocks having a first block size included in a macroblock to be coded, and a second arithmetic unit that calculates a second difference value between an input image and a predicted image for each of blocks having a second block size larger than the first block size included in the macroblock, and a prediction mode determination unit that determines a prediction mode to be applied to the macroblock, based on the first difference values of the macroblock calculated by the first arithmetic unit and the second difference values of the macroblock calculated by the second arithmetic unit. | 12-05-2013 |
20130329786 | METHOD FOR CODING AND RECONSTRUCTING A PIXEL BLOCK AND CORRESPONDING DEVICES - A method for coding a block of pixels is disclosed. The method for coding comprises:
| 12-12-2013 |
20130329787 | SIGNALING DATA FOR LONG TERM REFERENCE PICTURES FOR VIDEO CODING - A video coder codes a slice header for a slice of video data. The slice header includes a syntax element comprising identifying information for a long term reference picture, wherein the identifying information is explicitly signaled in the slice header or derived from a sequence parameter set corresponding to the slice. When the syntax element indicates that the identifying information for the long term reference picture is explicitly signaled, to code the slice header, the video coder is further configured to code a value for the identifying information for the long term reference picture in the slice header. | 12-12-2013 |
20130329788 | METHOD AND APPARATUS FOR ENCODING VIDEO, AND METHOD AND APPARATUS FOR DECODING VIDEO - Disclosed are method and apparatus for encoding and decoding an image which divides a current picture into blocks with various sizes and varies a number of intra prediction modes according to the sizes of the divided blocks. | 12-12-2013 |
20130329789 | PREDICTION MODE INFORMATION DOWNSAMPLING IN ENHANCED LAYER CODING - In one embodiment, a video coder for processing video data includes a processor and a memory. The processor is configured to downsample at least prediction mode information of a reference layer block. In addition, the processor is configured to predict at least one of an enhancement layer block or prediction mode information of the enhancement layer block based at least on the prediction mode information of the reference layer block before the processor downsamples the prediction mode information of the reference layer block. The memory is configured to store the prediction mode information of the reference layer block. The prediction mode information of the reference layer block, for example, includes an inter-prediction mode, an intra-prediction mode, or a motion vector of the reference layer block. | 12-12-2013 |
20130329790 | Method and System for Reducing Slice Header Parsing Overhead in Video Coding - A method for encoding a picture of a video sequence in a bit stream that reduces slice header parsing overhead is provided. The method includes determining weighting factors that may be used for weighted prediction in encoding at least one slice of the picture, wherein a total number of the weighting factors is constrained to not exceed a predetermined threshold number of weighting factors, wherein the threshold number is less than a maximum possible number of weighting factors, and signaling weighted prediction parameters including the weighting factors in a slice header in the bit stream. | 12-12-2013 |
20130329791 | METHOD AND APPARATUS FOR ENCODING VIDEO, AND METHOD AND APPARATUS FOR DECODING VIDEO - Disclosed are a method and a apparatus for encoding a video, and a method and apparatus for decoding a video, in which neighboring pixels used to perform intra prediction on a current block to be encoded are filtered and intra prediction is performed by using the filtered neighboring pixels. | 12-12-2013 |
20130329792 | METHOD AND DEVICE FOR OPTIMIZING THE COMPRESSION OF A VIDEO STREAM - A method and device for compressing at least a portion of a video image for transmission in a video stream such that the compressed portion either includes or does not include an encoded residual depending on whether including the residual would be advantageous in terms of data rate and distortion. The size of the video stream and the resources needed for decompression at a receiver are optimized through encoding only the most relevant data in the video stream. If the information added by a residual is insufficiently relevant or useful, the residual is not included or encoded. Factors associated with a residual are only encoded if use of the residual limits the distortion in a satisfactory manner and if the encoding of the associated factors does not generate too high of a data rate. Use of the method makes it possible to optimize resources needed by a decoder by optimizing use and encoding of the residual and associated factors. | 12-12-2013 |
20130329793 | DETERMINING INTRA PREDICTION MODE OF IMAGE CODING UNIT AND IMAGE DECODING UNIT - A method and apparatus for determining an intra prediction mode of a coding unit. Candidate intra prediction modes of a chrominance component coding unit, which includes an intra prediction mode of a luminance component coding unit, are determined, and costs of the chrominance component coding unit according to the determined candidate intra prediction modes are compared to determine a minimum cost intra prediction mode to be the intra prediction mode of the chrominance component coding unit. | 12-12-2013 |
20130329794 | INTRA-PREDICTION METHOD USING FILTERING, AND APPARATUS USING THE METHOD - Disclosed are an intra-prediction method using filtering and an apparatus using the method. An image-decoding method comprises: a step of filtering an n upper reference pixel of a block to be predicted and neighboring pixels of the n upper reference pixel so as to obtain the filtered n upper reference pixel; and a step of filtering an n left reference pixel of a block to be predicted and neighboring pixels of the n left reference pixel so as to obtain the filtered n left reference pixel. According to the present invention, intra-prediction may be efficiently performed to improve image-encoding/decoding efficiency. | 12-12-2013 |
20130329795 | Floating Point Video Coding - Floating point video coding is described. In particular, a video encoder/decoder and methods for floating point video coding are discussed. Floating point video coding can be used in the video encoder and decoder to support video content, such as HDR content. Specifically, a video codec structure such as H.264/AVC can be modified in order to support floating point video coding. Within any component of a codec system, some operations can be performed at floating point precision whereas other operations can be performed at fixed point precision. | 12-12-2013 |
20130336394 | INFERRED BASE LAYER BLOCK FOR TEXTURE_BL MODE IN HEVC BASED SINGLE LOOP SCALABLE VIDEO CODING - An apparatus for coding video data using a single-loop decoding approach may include a memory unit and a processor in communication with the memory unit. In an embodiment, the memory unit stores the video data, the video data including a base layer and an enhancement layer. The base layer includes a base layer block, a non-constrained INTRA mode block, and an INTER mode block. The base layer block includes a sub-block located at least partially within one of the non-constrained INTRA mode block or the INTER mode block. The enhancement layer includes an enhancement layer block located at a position in the enhancement layer corresponding to a position of the base layer block in the base layer. The processor approximates pixel values of the sub-block and determines, based at least in part on the approximated pixel values, pixel values of the enhancement layer block. | 12-19-2013 |
20130336395 | UNIFICATION OF SIGNALING LOSSLESS CODING MODE AND PULSE CODE MODULATION (PCM) MODE IN VIDEO CODING - Techniques described herein are related to harmonizing the signaling of coding modes and filtering in video coding. In one example, a method of decoding video data is provided that includes decoding a first syntax element to determine whether PCM coding mode is used for one or more video blocks, wherein the PCM coding mode refers to a mode that codes pixel values as PCM samples. The method further includes decoding a second syntax element to determine whether in-loop filtering is applied to the one or more video blocks. Responsive to the first syntax element indicating that the PCM coding mode is used, the method further includes applying in-loop filtering to the one or more video blocks based at least in part on the second syntax element and decoding the one or more video blocks based at least in part on the first and second syntax elements. | 12-19-2013 |
20130336396 | METHOD AND APPARATUS FOR ENCODING VIDEO IN CONSIDERATION OF SCANNING ORDER OF CODING UNITS HAVING HIERARCHICAL STRUCTURE, AND METHOD AND APPARATUS FOR DECODING VIDEO IN CONSIDERATION OF SCANNING ORDER OF CODING UNITS HAVING HIERARCHICAL STRUCTURE - A method and apparatus for decoding a video and a method and apparatus for encoding a video are provided. The method for decoding the video includes: receiving and parsing a bitstream of an encoded video; extracting, from the bitstream, encoded image data of a current picture of the encoded video assigned to a maximum coding unit, and information about a coded depth and an encoding mode according to the maximum coding unit; and decoding the encoded image data for the maximum coding unit based on the information about the coded depth and the encoding mode for the maximum coding unit, in consideration of a raster scanning order for the maximum coding unit and a zigzag scanning order for coding units of the maximum coding unit according to depths. | 12-19-2013 |
20130336397 | VIDEO ENCODING DEVICE, VIDEO DECODING DEVICE, VIDEO ENCODING METHOD, VIDEO DECODING METHOD, AND PROGRAM - A video encoding device for encoding video using inter prediction includes encoding control means | 12-19-2013 |
20130336398 | METHOD AND DEVICE FOR INTRA-PREDICTION - The multi sample prediction method of the present invention comprises the steps of: determining a sample group consisting of a plurality of samples inside a decoding target block; determining a representative position corresponding to the sample group, inside the decoding target block; determining a representative prediction value for the sample group, on the basis of the determined representative position; and determining the determined representative prediction value as the final prediction value for each of the plurality of samples making up the sample group. The present invention enhances efficiency in encoding/decoding and reduces complexity thereof. | 12-19-2013 |
20130343457 | COMPRESSION OF PICTURES - In video coding, where differences between input picture values and picture prediction values are transformed in a block based transform, the differences are formed in a series of parallel steps. A first step conducted in parallel upon a first subset of pixels uses prediction values based wholly on previously processed blocks. This first subset can include anchor pixels which are not contiguous with any previously processed block. A second step conducted in parallel upon a second subset includes pixels which are predicted from pixels of the first subset. | 12-26-2013 |
20140003500 | MULTI-PASS QUANTIZATION AND BIT PACKING CONTROL FOR VIDEO | 01-02-2014 |
20140003501 | Systems and Methods for Compressing Geotagged Video | 01-02-2014 |
20140003502 | Systems and Methods for Decoding Video Encoded Using Predictions that Reference Higher Rate Video Sequences | 01-02-2014 |
20140003503 | VIDEO CODING SYSTEM | 01-02-2014 |
20140003504 | Apparatus, a Method and a Computer Program for Video Coding and Decoding | 01-02-2014 |
20140003505 | METHOD AND APPARATUS FOR VIDEO CODING | 01-02-2014 |
20140003506 | SIGNALING OF LONG-TERM REFERENCE PICTURES FOR VIDEO CODING | 01-02-2014 |
20140003507 | MULTIVIEW VIDEO DECODING DEVICE, METHOD AND MULTIVIEW VIDEO CODING DEVICE | 01-02-2014 |
20140003508 | VIDEO ENCODING APPARATUS, VIDEO DECODING APPARATUS, VIDEO ENCODING METHOD, AND VIDEO DECODING METHOD | 01-02-2014 |
20140003509 | Cross Layer Spatial Intra Prediction | 01-02-2014 |
20140003510 | ENCODING APPARATUS, ENCODING METHOD, DECODING APPARATUS, AND DECODING METHOD | 01-02-2014 |
20140003511 | IMAGE ENCODING METHOD, IMAGE DECODING METHOD, IMAGE ENCODING DEVICE, IMAGE DECODING DEVICE, IMAGE ENCODING PROGRAM, AND IMAGE DECODING PROGRAM | 01-02-2014 |
20140003512 | IMAGE PROCESSING DEVICE AND IMAGE PROCESSING METHOD | 01-02-2014 |
20140003513 | METHOD AND APPARATUS FOR ENCODING VIDEO, AND METHOD AND APPARATUS FOR DECODING VIDEO | 01-02-2014 |
20140003514 | Block Error Compensating Apparatus of Image Frame and Method Thereof | 01-02-2014 |
20140003515 | VIDEO IMAGE DECODING DEVICE AND VIDEO IMAGE DECODING METHOD | 01-02-2014 |
20140010292 | SKIP TRANSFORM AND RESIDUAL CODING MODE EXTENSION FOR DIFFERENCE DOMAIN INTRA PREDICTION - An apparatus for coding video information according to certain aspects includes a memory unit and a processor in communication with the memory unit. The memory unit stores difference video information associated with a difference video layer of pixel information derived from a difference between an enhancement layer and a corresponding base layer of the video information. The processor determines a value of a video unit based on the difference video layer. The processor is further configured to refrain from performing a transform and residual coding of the determined value of the video unit. | 01-09-2014 |
20140010293 | METHOD AND SYSTEM FOR VIDEO PICTURE INTRA-PREDICTION ESTIMATION - Several systems and methods for intra-prediction estimation of video pictures are disclosed. In an embodiment, the method includes accessing four ‘N×N’ pixel blocks comprising luma-related pixels. The four ‘N×N’ pixel blocks collectively configure a ‘2N×2N’ pixel block. A first pre-determined number of candidate luma intra-prediction modes is accessed for each of the four ‘N×N’ pixel blocks. A presence of one or more luma intra-prediction modes that are common among the candidate luma intra-prediction modes of at least two of the four ‘N×N’ pixel blocks is identified. The method further includes performing, based on the identification, one of (1) selecting a principal luma intra-prediction mode for the ‘2N×2N’ pixel block and (2) limiting a partitioning size to a ‘N×N’ pixel block size for a portion of the video picture corresponding to the ‘2N×2N’ pixel block. | 01-09-2014 |
20140010294 | CODEC ARCHITECTURE FOR MULTIPLE LAYER VIDEO CODING - Systems, methods, and instrumentalities are provided to implement video coding system (VCS). The VCS may be configured to receive a video signal, which may include one or more layers (e.g., a base layer (BL) and/or one or more enhancement layers (ELs)). The VCS may be configured to process a BL picture into an inter-layer reference (ILR) picture, e.g., using picture level inter-layer prediction process. The VCS may be configured to select one or both of the processed ILR picture or an enhancement layer (EL) reference picture. The selected reference picture(s) may comprise one of the EL reference picture, or the ILR picture. The VCS may be configured to predict a current EL picture using one or more of the selected ILR picture or the EL reference picture. The VCS may be configured to store the processed ILR picture in an EL decoded picture buffer (DPB). | 01-09-2014 |
20140010295 | Methods and Apparatus for Geometric-Based Intra Prediction - Methods and apparatus are provided for geometric-based intra prediction. An apparatus includes a video encoder for encoding picture data for at least a portion of a block in a picture by detecting a local geometric pattern in a surrounding area with respect to the portion, and performing at least one of interpolation and extrapolation with respect to an edge direction of the local geometric pattern to generate an intra prediction for the portion. | 01-09-2014 |
20140010298 | MOVING PICTURE PREDICTION METHOD, MOVING PICTURE CODING METHOD AND APPARATUS, AND MOVING PICTURE DECODING METHOD AND APPARATUS - An image decoding method is provided which includes a time information determination step of determining time information of a current picture, a first reference picture referred to by the current picture and a second reference picture referred to by the current picture; a scaling parameter calculation step of calculating a scaling parameter based on a time distance between the first reference picture and a second reference picture; a weighting coefficient determination step of determining two weighting coefficients based on the scaling parameter; a predictive pixel value generation step of generating a predictive pixel value of the current picture by scaling a pixel value of the first reference picture and a pixel value of the second reference picture using the two weighting coefficients determined in the weighting coefficient determination step; and a decoding step of decoding the current picture using the predictive pixel value. | 01-09-2014 |
20140016696 | Video Transmission Using Content-Based Frame Search - A system, method and computer-readable medium are disclosed that uses previously transmitted video frames and associated video frame content information to reduce the amount of information to be transmitted from a sending device to a receiving device during a video transmission. | 01-16-2014 |
20140016697 | CODING RANDOM ACCESS PICTURES FOR VIDEO CODING - In one example, a device for decoding video data includes a processor configured to decapsulate a slice of a random access point (RAP) picture of a bitstream from a network abstraction layer (NAL) unit, wherein the NAL unit includes a NAL unit type value that indicates whether the RAP picture is of a type that can have associated leading pictures and whether the RAP picture is an instantaneous decoder refresh (IDR) picture or a clean random access (CRA) picture, determine whether the RAP picture can have associated leading pictures based on the NAL unit type value, and decode video data of the bitstream following the RAP picture based on the determination of whether the RAP picture can have associated leading pictures. | 01-16-2014 |
20140016698 | ROTATION OF PREDICTION RESIDUAL BLOCKS IN VIDEO CODING WITH TRANSFORM SKIPPING - Techniques are described for coding residual data of a prediction residual block with transform skipping. A transform may be skipped for a residual block when the residual block is coded using either a lossless coding mode or a lossy coding mode in a transform skip mode. According to the techniques, based on a transform being skipped for a residual block, a rotation unit included in a video encoder or a video decoder determines whether to rotate the residual block prior to coding residual data of the residual block. In some examples, a rotation value may be explicitly signaled between the video encoder and the video decoder. In other examples, the video encoder and the video decoder may each independently determine whether to rotate the residual block based on a type of boundary at two or more edges of the residual block. | 01-16-2014 |
20140016699 | REFERENCE PICTURE LIST MODIFICATION FOR VIDEO CODING - A video decoder generates an initial reference picture list (RPL). Furthermore, the video decoder determines that an ordered set of reference picture list modification (RPLM) syntax elements does not include any additional syntax elements when a syntax element in the ordered set of RPLM syntax elements has a particular value. Furthermore, the video decoder generates a final RPL. For each respective RPLM syntax element in the ordered set of syntax elements, when the respective RPLM syntax element does not have the particular value, the final RPL includes, at an insertion position for the respective RPLM syntax element, a particular reference picture. The respective syntax element indicates a position in the initial RPL of the particular RPLM reference picture. The insertion position for the respective RPLM syntax element corresponds to a position in the ordered set of RPLM syntax elements of the respective RPLM syntax element. | 01-16-2014 |
20140016700 | METHOD OF CODING AND DECODING IMAGES, CODING AND DECODING DEVICE AND COMPUTER PROGRAMS CORRESPONDING THERETO - A method of coding at least one image comprising the steps of splitting the image into a plurality of blocks, of grouping said blocks into a predetermined number of subsets of blocks, of coding each of said subsets of blocks in parallel, the blocks of a subset considered being coded according to a predetermined sequential order of traversal. The coding step comprises, for a current block of a subset considered, the sub-step of predictive coding of said current block with respect to at least one previously coded and decoded block, and the sub-step of entropy coding of said current block on the basis of at least one probability of appearance of a symbol. | 01-16-2014 |
20140023138 | REUSING PARAMETER SETS FOR VIDEO CODING - In one example, a device includes a video coder (e.g., a video encoder or a video decoder) configured to code parameter set information for a video bitstream, code video data of a base layer of the video bitstream using the parameter set information, and code video data of an enhancement layer of the video bitstream using at least a portion of the parameter set information. The parameter set information may include, for example, profile and level information and/or hypothetical reference decoder (HRD) parameters. For example, the video coder may code a sequence parameter set (SPS) for a video bitstream, code video data of a base layer of the video bitstream using the SPS, and code video data of an enhancement layer of the video bitstream using at least a portion of the SPS, without using any other SPS for the enhancement layer. | 01-23-2014 |
20140023139 | CROSS-CHANNEL RESIDUAL PREDICTION - Systems, apparatus and methods are described including determining a prediction residual for a channel of video data; and determining, using the first channel's prediction residual, a prediction residual for a second channel of the video data. Further, a prediction residual for a third channel of the video data may be determined using the second channel's prediction residual. | 01-23-2014 |
20140023140 | METHODS AND APPARATUSES FOR ENCODING AND DECODING VIDEO USING MULTIPLE REFERENCE PICTURES - A video encoding method using reference pictures includes: writing a parameter indicating a temporal level of a reference picture or a period of a type of a reference picture into the reference picture for each of the reference pictures, creating a first list of reference pictures comprising the reference pictures sorted based on the parameter; and encoding a current picture of the video using at least the first list of reference pictures. A video decoding method using a reference pictures includes: parsing a parameter indicating a temporal level of a reference picture or a period of a type of a reference picture from each of the reference pictures; creating a first list of reference pictures comprising the reference pictures sorted based on the parameter; and decoding a current picture of the video using at least the first list of reference pictures. Corresponding video encoding and decoding apparatuses are provided. | 01-23-2014 |
20140029666 | VIDEO IMAGE DECODING APPARATUS AND VIDEO IMAGE ENCODING SYSTEM - A video image decoding apparatus includes a plurality of predicted image generating units that generate predicted images according to respectively different methods. A predicted image combining unit combines the predicted images generated by the predicted image generating units to obtain a predicted image. A decoding unit decodes an encoded image by using, as side information, the predicted image obtained by the predicted image combining unit. | 01-30-2014 |
20140029667 | METHOD OF CODING AN IMAGE EPITOME - A method of coding an image epitome is disclosed. The method of coding comprises:
| 01-30-2014 |
20140029668 | APPARATUS FOR ENCODING AND DECODING IMAGE BY SKIP ENCODING AND METHOD FOR SAME - The present invention relates to an apparatus and method for encoding and decoding an image by skip encoding. The image-encoding method by skip encoding, which performs intra-prediction, comprises: performing a filtering operation on the signal which is reconstructed prior to an encoding object signal in an encoding object image; using the filtered reconstructed signal to generate a prediction signal for the encoding object signal; setting the generated prediction signal as a reconstruction signal for the encoding object signal; and not encoding the residual signal which can be generated on the basis of the difference between the encoding object signal and the prediction signal, thereby performing skip encoding on the encoding object signal. | 01-30-2014 |
20140036999 | FRAME PRIORITIZATION BASED ON PREDICTION INFORMATION - Priority information may be used to distinguish between different types of video data, such as different video packets or video frames. The different types of video data may be included in the same temporal level and/or different temporal levels in a hierarchical structure. A different priority level may be determined for different types of video data at the encoder and may be indicated to other processing modules at the encoder, or to the decoder, or other network entities such as a router or a gateway. The priority level may be indicated in a header of a video packet or signaling protocol. The priority level may be determined explicitly or implicitly. The priority level may be indicated relative to another priority or using a priority identifier that indicates the priority level. | 02-06-2014 |
20140037000 | APPARATUS FOR ENCODING AND DECODING IMAGE USING ADAPTIVE DCT COEFFICIENT SCANNING BASED ON PIXEL SIMILARITY AND METHOD THEREFOR - The present invention discloses an encoding apparatus using a Discrete Cosine Transform (DCT) scanning, which includes a mode selection means for selecting an optimal mode for intra prediction; an intra prediction means for performing intra prediction onto video inputted based on the mode selected in the mode selection means; a DCT and quantization means for performing DCT and quantization onto residual coefficients of a block outputted from the intra prediction means; and an entropy encoding means for performing entropy encoding onto DCT coefficients acquired from the DCT and quantization by using a scanning mode decided based on pixel similarity of the residual coefficients. | 02-06-2014 |
20140037001 | METHOD AND DEVICE FOR DETERMINING REFERENCE UNIT - An inter prediction method according to the present invention comprises the steps of: selecting candidate units from among reconstructed neighbor units; creating a candidate unit set with respect to units to be decoded, using the selected candidate units; determining a reference unit from among the candidate units which constitute the created candidate unit set; and performing inter prediction on the units to be decoded, using the determined reference unit. According to the present invention, image encoding/decoding efficiency can be improved. | 02-06-2014 |
20140037002 | IMAGE PROCESSING APPARATUS AND IMAGE PROCESSING METHOD - Provided is an image processing apparatus including a mode setting section that, when a number of candidates of an intra prediction mode of a first prediction unit in a first layer of an image to be scalable-video-decoded containing the first layer and a second layer, which is an upper layer of the first layer, is different from the number of candidates of the intra prediction mode of a second prediction unit corresponding to the first prediction unit in the second layer, sets the prediction mode selected based on the prediction mode set to the first prediction unit to the second prediction unit, and a prediction section that generates a predicted image of the second prediction unit according to the prediction mode set by the mode setting section. | 02-06-2014 |
20140044166 | Transform-Domain Intra Prediction - A method for encoding a frame having a plurality of blocks in a video stream using transform-domain intra prediction is disclosed. The method includes generating, using a two-dimensional transform, a set of transform coefficients for a current block; generating, using a one-dimensional transform, a set of transform coefficients for previously coded pixel values in the frame; determining, using the set of transform coefficients for the previously coded pixel values, a set of transform coefficients for a prediction block; determining a residual based on the difference between the set of transform coefficients for the current block and the set of coefficients for the prediction block; and encoding the residual. | 02-13-2014 |
20140044167 | VIDEO ENCODING APPARATUS AND METHOD USING RATE DISTORTION OPTIMIZATION - An apparatus for video encoding includes an image prediction unit configured to generate a prediction image about an input image; and a differential signal generation unit configured to generate a differential signal by subtracting the prediction image from the input image. Further, the apparatus includes a restoration image generation unit configured to generate a first restoration image about the input image using the prediction image; and an in-loop filter unit configured to produce a second restoration image that in-loop filtering has been performed, and after performing rate distortion optimization (RDO) by producing bit amount information necessary for restoring the second restoration image, provide result information of the RDO with the image prediction unit. | 02-13-2014 |
20140044168 | DEVICE AND METHOD FOR SCALABLE CODING OF VIDEO INFORMATION - An apparatus for coding video data according to certain aspects includes a memory unit and a processor in communication with the memory unit. The memory unit is configured to store video data associated with a base layer and a corresponding enhancement layer. The processor is in communication with the memory, and in a case that the video data comprises a particular mode flag, the processor determines (e.g., predicts) an enhancement layer block in the enhancement layer of the video data based at least in part on a co-located block in the base layer of video data while assuming a residual associated with the enhancement layer block in the enhancement layer (the co-located block in the base layer being a predictor for the enhancement layer block) is equal to zero and without transmitting or receiving the residual or transform coefficients, coded block flags or a transform depth associated with the enhancement layer block. The co-located block in the base layer is located at a position in the base layer corresponding to a position of the enhancement layer block in the enhancement layer. The position on the base layer block can be adjusted according to the ratio of the base and enhancement frame resolutions. The processor may encode or decode the video data. | 02-13-2014 |
20140044169 | IMAGE DECODING METHOD, IMAGE CODING METHOD, IMAGE DECODING APPARATUS, IMAGE CODING APPARATUS, PROGRAM, AND INTEGRATED CIRCUIT - An image decoding method includes: restoring a selected prediction mode used in prediction at a time of coding; and decoding a current block included in coded image data to generate a decoded block, according to the prediction based on the selected prediction mode. The restoring includes: determining a first estimated prediction mode; determining a second estimated prediction mode different from the first estimated prediction mode; and restoring the selected prediction mode based on the mode information, the first estimated prediction mode, and the second estimated prediction mode. | 02-13-2014 |
20140044170 | IMAGE PROCESSING DEVICE AND METHOD - The present technology relates to an image processing device and a method capable of improving encoding efficiency. In a weighted prediction process performed in an image encoding process or in an image decoding process, a motion compensation unit that performs motion compensation of sub-pixel accuracy for each of L0 and L1, a weighted addition unit that applies weighted addition to arithmetic operation results by the motion compensation unit, and a rounding processing unit that suppresses a decrease in arithmetic operation accuracy by performing a necessary rounding process once with respect to an arithmetic operation result by the weighted addition unit are provided. The present disclosure can be applied to an image processing device. | 02-13-2014 |
20140056347 | Non-Transform Coding - Techniques for selectively transforming one or more coding units when coding video content are described herein. The techniques may include determining whether or not to transform a particular coding unit. The determination may be based on a difference in pixel values of the particular coding unit and/or one or more predefined rate-distortion constraints. When it is determined to not perform a transform, the particular coding unit may be coded without transforming the particular coding unit. | 02-27-2014 |
20140056348 | METHODS AND DEVICE FOR RECONSTRUCTING AND CODING AN IMAGE BLOCK - A method for reconstruction of a current block predicted from at least one reference block is described. The method comprises the steps for:
| 02-27-2014 |
20140056349 | IMAGE ENCODING DEVICE AND IMAGE DECODING DEVICE - A video encoding device includes: a quantization step size encoding unit | 02-27-2014 |
20140056350 | SIMPLIFICATIONS FOR BOUNDARY STRENGTH DERIVATION IN DEBLOCKING - The present invention relates to an advantageous scheme for boundary strength derivation and decision processing related to deblocking filtering. More particularly, the present invention improves schemes for deciding deblocking and selecting appropriate deblocking filters known in the art so as to reduce the number of calculation cycles and required memory space. | 02-27-2014 |
20140056351 | MOVING PICTURE CODING METHOD AND MOVING PICTURE DECODING METHOD - According to a picture coding method, a coded picture is stored, as a reference picture, into a storage unit; commands indicating correspondence between reference pictures and reference indices for designating reference pictures and coefficients used for generation of predictive images are generated; a reference picture being used when motion compensation is performed on a current block in a current picture to be coded is designated by a reference index; a predictive image is generated by performing linear prediction on a block being obtained by motion estimation within the designated reference picture, by use of a coefficient corresponding to the reference index; a coded image signal including a coded signal obtained by coding a prediction error being a difference between the current block in the current picture to be coded and the predictive image, the commands, the reference index and the coefficient is outputted. | 02-27-2014 |
20140056352 | INTRA-PREDICTION METHOD, AND ENCODER AND DECODER USING SAME - The present invention relates to an intra-prediction method and to an encoder and decoder using same. The intra-prediction method according to one embodiment of the present invention comprises the steps of: deriving a prediction mode of a current block; and generating a prediction block with respect to the current block on the basis of the prediction mode of the current block. When the prediction mode of the current block is an intra-angular prediction mode, values of boundary samples from among left boundary samples and upper boundary samples of the prediction block, which are not positioned in a prediction direction of the intra-angular prediction mode, are derived on the basis of reference samples positioned in the prediction direction of the intra-angular prediction mode, and on the basis of adjacent reference samples. | 02-27-2014 |
20140064363 | Decoders and Methods Thereof for Managing Pictures in Video Decoding Process - An object with the embodiments of the present invention is to make it well defined from which previously decoded picture to retrieve the values for calculating POC of the current picture regardless of how many temporal layers have been decoded. | 03-06-2014 |
20140064364 | METHODS AND DEVICES FOR INTER-LAYER PREDICTION IN SCALABLE VIDEO COMPRESSION - Methods and devices for encoding and decoding scalable video are described. In one aspect, a method of reconstructing, in a video decoder, an enhancement-layer image based upon a reconstructed reference-layer image using inter-layer prediction is described. The method includes reconstructing a reference-layer residual and a reference-layer prediction, wherein the reference-layer residual and the reference-layer prediction, when combined, form the reconstructed reference-layer image; up-sampling the reference-layer residual using a first up-sampling operation; up-sampling the reference-layer prediction using a second up-sampling operation different from the first up-sampling operation; generating an inter-layer prediction using the up-sampled reference-layer residual and the up-sampled reference-layer prediction; and reconstructing the enhancement-layer image based upon the inter-layer prediction. | 03-06-2014 |
20140064365 | METHODS AND DEVICES FOR ENTROPY CODING IN SCALABLE VIDEO COMPRESSION - Methods and devices for decoding, in a video decoder, a block of enhancement-layer transform domain data for an enhancement-layer encoded video and corresponding to a reconstructed block of reference-layer transform domain data, are provided. The method includes determining a context for an enhancement-layer element based, at least in part, upon elements in the corresponding reconstructed block of reference-layer transform domain data, wherein the elements are identified by a template and wherein the position of the template in the reference-layer reconstructed block is based upon the position of that enhancement-layer element in the block of enhancement-layer transform domain data. | 03-06-2014 |
20140064366 | Intra-Prediction Estimation Using Approximate Reconstructed Samples - A method for intra-prediction estimation is provided that includes determining a best intra-prediction mode for a block of samples, wherein at least some of the neighboring samples used for intra-prediction estimation include approximate reconstructed samples, applying approximate reconstruction to the block of samples using the best intra-prediction mode to generate a block of approximate reconstructed samples, and storing the block of approximate reconstructed samples for use in intra-prediction estimation of other blocks of samples. | 03-06-2014 |
20140064367 | METHOD AND APPARATUS FOR ENCODING AND DECODING CODING UNIT OF PICTURE BOUNDARY - A method and apparatus for encoding an image is provided. An image coding unit, including a region that deviates from a boundary of a current picture, is divided to obtain a coding unit having a smaller size than the size of the image coding unit, and encoding is performed only in a region that does not deviate from the boundary of the current picture. A method and apparatus for decoding an image encoded by the method and apparatus for encoding an image is also provided. | 03-06-2014 |
20140064368 | IMAGE ENCODING DEVICE, IMAGE DECODING DEVICE, IMAGE ENCODING METHOD, IMAGE DECODING METHOD, AND IMAGE PREDICTION DEVICE - When an intra prediction parameter indicates a horizontal prediction process, an intra prediction unit adds a value proportional to a change in a horizontal direction of the luminance values of pixels adjacent to the top of each block, which is a unit for prediction process of a coding block, to the luminance value of a pixel adjacent to the left of the block to set a result of the addition as a predicted value of a prediction image, whereas when the intra prediction parameter indicates a vertical prediction process, the intra prediction unit adds a value proportional to a change in a vertical direction of the luminance values of pixels adjacent to the left of the block to the luminance value of the pixel adjacent to the top of the block to set the result of the addition as a predicted value of the prediction image. | 03-06-2014 |
20140072038 | Reference Picture List Handling - In a method performed by an encoder according to a first aspect a one-bit flag is signaled, wherein the one-bit flag is associated with a reference picture in a buffer description for the current picture. The one-bit flag is set to explicitly indicate to a decoder if the reference picture should be included in a list of reference pictures or not included in the list of reference pictures. The list of reference pictures indicates which pictures that can be used for decoding the current picture. | 03-13-2014 |
20140072039 | METHOD, DEVICE, AND SYSTEM FOR MULTIPLEXING OF VIDEO STREAMS - A method of reproducing at least two digital video sequences. The method includes multiplexing a first digital video sequence with a second digital video sequence, pictures of the second digital video sequence are included in advance in a video stream and are associated with timing information such that a receiver will not decode and reproduce the pictures of the second digital video sequence. The method includes composing the at least two digital video sequences into the video stream in correspondence with a result of the multiplexing and subsequently including a sequence of dummy timing pictures into the video stream. The dummy timing pictures are inter-predicted and are coded by omitting any prediction error data. | 03-13-2014 |
20140079119 | Encoder and Decoder and Methods Thereof for Encoding/Decoding a Picture of a Video Sequence - An object of the embodiments is to achieve an improved reference picture handling. That is achieved by taking into account whether the reference pictures in the decoded picture buffer are long-term reference pictures or short-term reference pictures when determining how they should be marked when the information of the reference picture set is received. The reference pictures are marked as “used for short-term reference” or “used for long-term reference” in the Decoded Picture Buffer (DPB) depending on whether they are included as short-term pictures or long-term pictures in the RPS of a current picture. | 03-20-2014 |
20140079120 | MOVING IMAGE CODING APPARATUS AND MOVING IMAGE CODING METHOD - Moving images are coded with reduced deterioration in the image quality while variations in the amount of code per frame are being reduced. A moving image coding apparatus includes a remaining picture number obtaining unit, an activity calculation unit, an intra MB determination unit, and a coding unit. The remaining picture number obtaining unit detects the temporal position of the current frame image, and determines the reset timing at which an intra refresh process is reset in a manner that the reset timing differs for each macroblock line (MBL). The activity calculation unit calculates an activity value for each macroblock (MB). The intra MB determination unit determines a MB to be set as an intra MB based on the activity value calculated by the activity calculation unit. The coding unit codes the MB set as an intra MB through an intra coding process. | 03-20-2014 |
20140079121 | METHOD AND APPARATUS FOR ENCODING VIDEO, AND METHOD AND APPARATUS FOR DECODING VIDEO - A method of decoding an image including: obtaining information about an intra prediction mode applied to a current block to be decoded, from a bitstream; obtaining one of a left neighboring pixel whose location is determined based on j*dy>>n and a up neighboring pixel whose location is determined based on i*dx>>m, where a current pixel is located on (i,j), dx, dy, m and n are integers; performing intra prediction on the current pixel using one of the left neighboring pixel and the up neighboring pixel. | 03-20-2014 |
20140079122 | IMAGE PROCESSING APPARATUS AND IMAGE PROCESSING METHOD - The present technique relates to an image processing apparatus and an image processing method which allow the encoding efficiency to be improved. The image processing apparatus includes: a control unit that controls encoding of various parameters related to intra prediction in accordance with a size and a shape of a prediction unit that is a region in a prediction processing unit by selecting a table and setting a context probability model, and an encoding unit that encodes the parameters according to control by the control unit. The present disclosure can be applied to an image processing apparatus. | 03-20-2014 |
20140086315 | ERROR RESILIENT MANAGEMENT OF PICTURE ORDER COUNT IN PREDICTIVE CODING SYSTEMS - Coding techniques for input video may include assigning picture identifiers to input frames in either long-form or short-form formats. If a network error has occurred that results in loss of previously-coded video data, a new input frame may be assigned a picture identifier that is coded in a long-form coding format. If no network error has occurred, the input frame may be assigned a picture identifier that is coded in a short-form coding format. Long-form coding may mitigate against loss of synchronization between an encoder and a decoder by picture identifiers. | 03-27-2014 |
20140086316 | VIDEO COMPRESSION WITH COLOR SPACE SCALABILITY - An image decoder includes a base layer to decode at least a portion of an encoded video stream into a first image having a first image format. The image decoder can generate a color space prediction by scaling a color space of the first image from the first image format into a color space corresponding to a second image format. The image decoder includes an enhancement layer to decode the encoded video stream to generate a second image in the second image format based, at least in part, on the color space prediction. | 03-27-2014 |
20140086317 | INDICATION AND ACTIVATION OF PARAMETER SETS FOR VIDEO CODING - In some examples, a video encoder includes multiple sequence parameter set (SPS) IDs in an SEI message, such that multiple active SPSs can be indicated to a video decoder. In some examples, a video decoder activates a video parameter set (VPS) and/or one or more SPSs through referencing an SEI message, e.g., based on the inclusion of the VPS ID and one or more SPS IDs in the SEI message. The SEI message may be, as examples, an active parameter sets SEI message or a buffering period SEI message. | 03-27-2014 |
20140086318 | VIDEO COMPRESSION WITH COLOR SPACE SCALABILITY - An image decoder includes a base layer to decode at least a portion of an encoded video stream into a first image having a first image format. The image decoder can generate a color space prediction by scaling a color space of the first image from the first image format into a color space corresponding to a second image format. The image decoder includes an enhancement layer to decode the encoded video stream to generate a second image in the second image format based, at least in part, on the color space prediction. | 03-27-2014 |
20140086319 | VIDEO CODING SYSTEM WITH ADAPTIVE UPSAMPLING AND METHOD OF OPERATION THEREOF - A video coding system and method of operation includes: a receive bitstream module for receiving a video bitstream and extracting a filter flag from the video bitstream; an upsampling filter module, coupled to the receive bitstream module, for extracting a base layer from the video bitstream, and for forming a prediction for calculating an enhancement layer by upsampling the base layer using an upsampling filter, the upsampling filter configured with upsampling filter coefficients; and a display interface, coupled to the upsampling filter module, for forming a video stream based on the base layer, the enhancement layer, and the filter flag for displaying on a device. | 03-27-2014 |
20140086320 | Multiple Decoding - A system for processing information received from a plurality of source devices. Various aspects of the present invention provide a first video generating device that produces a first video output that comprises compressed video information representative of a sequence of video frames, the compressed video information comprising inter-frame comparison information. A second video generating device is also provided, which produces a second video output. A processing module is communicatively coupled to the first and second video generating devices and independent of such devices. The processing module may decompress the first video output from the first video generating device. A video presentation device is provided, which may generate a display corresponding to the first video output via the processing module and a display corresponding to the second video output via the processing module. Generally analogous components for processing audio information are also provided. | 03-27-2014 |
20140086321 | HIGH DYNAMIC RANGE CODECS - A method for encoding high dynamic range (HDR) images involves providing a lower dynamic range (LDR) image, generating a prediction function for estimating the values for pixels in the HDR image based on the values of corresponding pixels in the LDR image, and obtaining a residual frame based on differences between the pixel values of the HDR image and estimated pixel values. The LDR image, prediction function and residual frame can all be encoded in data from which either the LDR image of HDR image can be recreated. | 03-27-2014 |
20140086322 | IMAGE PROCESSING DEVICE AND METHOD - The present technique relates to an image processing device and a method that can improve encoding efficiency in multi-viewpoint encoding. A reference image index allocation unit alternately allocates a reference image index referred by a motion estimator/compensator to predict an image to be processed to a referable image in a view direction and to a referable image in a time direction. In allocation, the reference image index allocation unit refers to time information and view information of the reference image accumulated in a decoded picture buffer, information such as a sequence parameter set and a slice header from a syntax processing unit, and the like. The present disclosure can be applied to image processing devices, for example. | 03-27-2014 |
20140086323 | METHOD AND APPARATUS FOR CODING OF INTRA PREDICTION MODE - Embodiments according to the present invention configure the intra prediction mode candidates into multi-level MPM sets, which comprise at least a first-level MPM set and a second-level MPM set. Encoding or decoding a current intra prediction mode is based on the multi-level MPM sets, where one syntax element of the syntax information to be generated or decoded respectively is associated with evaluating the current intra prediction mode using the first-level MPM set. A method and apparatus for spectively is associated with evaluating the current intra prediction mode using the first-level MPM set. A method and apparatus for chroma intra prediction mode encoding and decoding are also disclosed. The chroma intra prediction mode set includes a Luma-based chroma prediction Mode (LM), a Direct Mode (DM) and four other modes. The codeword set comprises variable-length codewords and fixed-length codewords, and the fixed-length codewords are longer than the variable-length codewords. The variable-length codewords are used for the DM and LM, and the fixed-length codewords are used for the four other modes. | 03-27-2014 |
20140092961 | SIGNALING DECODER PICTURE BUFFER INFORMATION - A system for decoding a video bitstream includes receiving a frame of the video that includes at least one slice and at least one tile and where each of the at least one slice and the at least one tile are not all aligned with one another. | 04-03-2014 |
20140092962 | INTER FIELD PREDICTIONS WITH HEVC - To improve the coding efficiency of field sequences, any GOP structures for field sequence coding by HEVC have both top and bottom fields in a reference list. Modified HEVC inter-field prediction uses an interlaced video with a series of frames. Each interlaced frame is separated into a top field and a bottom field. For HEVC encoding, inter-field prediction structures are defined with the following properties: if a current block in a picture includes only pixels in a field and it has more than one reference field pictures as reference pictures in a reference list, then at least one of the reference field pictures comes from the top field of a frame and at least one of the reference field pictures comes from the bottom field of a frame. | 04-03-2014 |
20140092963 | SIGNALING OF REGIONS OF INTEREST AND GRADUAL DECODING REFRESH IN VIDEO CODING - During a coding process, systems, methods, and apparatus may code information indicating whether gradual decoder refresh (GDR) of a picture is enabled. When GDR is enabled, the coding process, systems, methods, and apparatus may code information that indicates whether one or more slices of the picture belong to a foreground region of the picture. In another example, during a coding process, systems, methods, and apparatus may decode video data corresponding to an ISP identification (ISP ID) for one of the ISPs for slices of a picture. The systems, methods, and apparatus may decode video data corresponding to an ROI using the ISP. | 04-03-2014 |
20140092964 | Apparatus, a Method and a Computer Program for Video Coding and Decoding - There are disclosed various methods, apparatuses and computer program products for video encoding and decoding. In other embodiments, there is provided a method, an apparatus, a computer readable storage medium stored with code thereon for use by an apparatus, and a video encoder, for encoding a scalable bitstream, to provide indicating an encoding configuration, where only samples and syntax from intra coded pictures of base layer is used for coding the enhancement layer pictures. In other embodiments, there is provided an apparatus, a computer readable storage medium stored with code thereon for use by an apparatus, and a video decoder, for decoding a scalable bitstream, to receive indications of an encoding configuration, where only samples and syntax from intra coded pictures of base layer is used for coding the enhancement | 04-03-2014 |
20140092965 | INTRA-CODING FOR 4:2:2 SAMPLE FORMAT IN VIDEO CODING - Systems, methods, and devices for video coding that may receive a rectangular chroma block are disclosed. The rectangular chroma block may be divided into a first square sub-block and a second square sub-block. The systems, methods, and devices may reconstruct the first square sub-block and intra-predict the second square sub-block using reference samples from the reconstructed first square sub-block. | 04-03-2014 |
20140092966 | VIDEO ENCODING APPARATUS, VIDEO DECODING APPARATUS, VIDEO ENCODING METHOD, AND VIDEO DECODING METHOD - A video encoding apparatus appends decoding delay and display delay correction information to encoded video data in order to ensure that even when one or more pictures that are later in encoding order than a starting encoded picture in a video data stream to be spliced to a trailing end of another encoded video data stream have been discarded from among pictures contained in the video data stream, the starting encoded picture and its subsequent pictures can be continuously decoded and displayed by a video decoding apparatus. The correction information is calculated based on a decoding interval between each discarded picture and a picture that immediately precedes the discarded picture. The video decoding apparatus corrects the decoding delay and display delay of the starting encoded picture and its subsequent pictures by using the calculated correction information. | 04-03-2014 |
20140098859 | ENTROPY DECODING METHOD, AND DECODING APPARATUS USING SAME - The present invention relates to an entropy decoding method and to a decoding apparatus using same. The entropy decoding method according to the present invention comprises: a step of decoding a bin of a syntax element; and a step of acquiring information on the syntax element based on the decoded bin. In the step of decoding the bin, context-based decoding or bypass decoding is performed for each bin of the syntax element. | 04-10-2014 |
20140098860 | FILE FORMAT FOR VIDEO DATA - A device generates a file that stores coded samples that contain coded pictures of the video data. The file also includes a sample entry that includes an element that indicates whether all sequence parameter sets (SPSs) that are activated when a stream to which the sample entry applies is decoded have syntax elements that indicate that temporal sub-layer up-switching to any higher temporal sub-layer can be performed at any sample associated with the SPSs. The same or different device determines, based on the element in the sample entry, that all SPSs that are activated when the stream to which the sample entry applies is decoded have syntax elements that indicate that temporal sub-layer up-switching to any higher temporal sub-layer can be performed at any sample associated with the SPSs. | 04-10-2014 |
20140098861 | Architecture for Hybrid Video Codec - A method for video encoding comprising transforming a plurality of pixels to generate a first plurality of transform coefficients, quantizing the first plurality of transform coefficients to generate a plurality of quantized transform coefficients, computing a plurality of prediction pixels based on a plurality of reconstructed pixels which are prediction references for the plurality of pixels, transforming the plurality of prediction pixels to generate a second plurality of transform coefficients, and computing a plurality of prediction residual coefficients as a difference between the plurality of quantized transform coefficients and the second plurality of transform coefficients. | 04-10-2014 |
20140098862 | ENCODING OR DECODING METHOD AND APPARATUS - Embodiments of the present invention provide an encoding or decoding method and apparatus. The method includes: extracting first information in a bitstream; determining a chroma component intra prediction mode according to the first information; when the chroma component intra prediction mode cannot be determined according to the first information, extracting second information in the bitstream; and determining the chroma component intra prediction mode according to the second information, where the first information includes information for indicating whether the chroma component intra prediction mode is a DM mode or an LM mode, the second information is used to indicate a remaining mode as the chroma component intra prediction mode, and the remaining mode is one of available chroma component intra prediction modes other than a mode that may be determined according to the first information. | 04-10-2014 |
20140098863 | VIDEO CODER PROVIDING IMPLICIT COEFFICIENT PREDICTION AND SCAN ADAPTATION FOR IMAGE CODING AND INTRA CODING OF VIDEO - A predictive video coder performs gradient prediction based on previous blocks of image data. For a new block of image data, the prediction determines a horizontal gradient and a vertical gradient from a block diagonally above the new block (vertically above a previous horizontally adjacent block). Based on these gradients, the encoder predicts image information based on image information of either the horizontally adjacent block or a block vertically adjacent to the new block. The encoder determines a residual that is transmitted in an output bitstream. The decoder performs the identical gradient prediction and predicts image information without need for overhead information. The decoder computes the actual information based on the predicted information and the residual from the bitstream. | 04-10-2014 |
20140098864 | Referenceable Frame Expiration - Coding techniques for a video image compression system involve improving an image quality of a sequence of two or more bi-directionally predicted intermediate frames, where each of the frames includes multiple pixels. One method involves determining a brightness value of at least one pixel of each bi-directionally predicted intermediate frame in the sequence as an equal average of brightness values of pixels in non-bidirectionally predicted frames bracketing the sequence of bi-directionally predicted intermediate frames. The brightness values of the pixels in at least one of the non-bidirectionally predicted frames is converted from a non-linear representation. | 04-10-2014 |
20140098865 | DEVICE, METHOD, AND PROGRAM FOR PICTURE CODING, AND DEVICE, METHOD, AND PROGRAM FOR PICTURE DECODING - An intra prediction mode selecting unit selects an intra prediction mode for a block subject to coding. A most probable mode list construction unit constructs, using intra prediction modes for multiple reference blocks, a list of most probable modes having a certain number of elements for any block subject to coding, irrespective of the number of different intra prediction modes for multiple coded blocks. A most probable mode index calculating unit calculates, when the intra prediction mode for a block subject to coding is probable, information identifying the most probable mode according to the list. A non-probable mode index calculating unit calculates, when the intra prediction mode for a block subject to coding is not probable, information identifying the non-probable mode according to the list. | 04-10-2014 |
20140098866 | In-Loop Adaptive Wiener Filter for Video Coding and Decoding - A video encoder may use an adaptive Wiener filter inside the core video encoding loop to improve coding efficiency. In one embodiment, the Wiener filter may be on the input to a motion estimation unit and, in another embodiment, it may be on the output of a motion compensation unit. The taps for the Wiener filter may be determined based on characteristics of at least a region of pixel intensities within a picture. Thus, the filtering may be adaptive in that it varies based on the type of video being processed. | 04-10-2014 |
20140098867 | METHOD AND APPARATUS FOR DECODING INTRA PREDICTION MODE - An intra prediction mode decoding method includes reconstructing an intra prediction mode group indicator and a prediction mode index, constructing an MPM group including three intra prediction modes using valid intra prediction modes of left and top blocks of the current block, determining the intra prediction mode corresponding to the prediction mode index in the intra prediction group corresponding to the intra prediction mode group indicator, and assigning the lowest mode numbers to non-directional modes. Therefore, it is possible to reduce the amount of information for encoding the intra prediction mode of the current block by using intra prediction modes having higher possibility of being equal to the intra prediction mode of the current block. Also, it is possible to reduce the amount of information by assigning lowest mode numbers to the non-directional modes. | 04-10-2014 |
20140105286 | ROBUST VIDEO CODING USING VIRTUAL FRAMES - A method of encoding video frames to produce encoded video frames. Each encoded video frame is represented by a bit-stream, the bit-stream representative of an encoded video frame including high and low priority information. At least some of the low priority information is decoded from a bit-stream depending on decoding of at least some of the high priority information from the bit-stream. The method includes encoding a first video frame to form a first encoded video frame, the first encoded video frame being represented by a first bit-stream including high and low priority information representative of the first video frame. A first complete reference frame is formed by decoding the high and low priority information from the first bit-stream. A first virtual reference frame is formed using the high priority information decoded from the first bit-stream. | 04-17-2014 |
20140105287 | IMAGE ENCODING METHOD AND DEVICE, AND DECODING METHOD AND DEVICE THEREFOR - A video encoding method and apparatus and a video decoding method and apparatus. In the video encoding method, a first predicted coding unit of a current coding unit that is to be encoded is produced, a second predicted coding unit is produced by changing a value of each pixel of the first predicted coding unit by using each pixel of the first predicted coding unit and at least one neighboring pixel of each pixel, and the difference between the current coding unit and the second predicted coding unit is encoded, thereby improving video prediction efficiency. | 04-17-2014 |
20140105288 | IMAGE ENCODING DEVICE, IMAGE ENCODING METHOD, IMAGE DECODING DEVICE, IMAGE DECODING METHOD, PROGRAM, AND STORAGE MEDIUM - A prediction set determining section selects a prediction set from a prediction set group including a plurality of prediction sets having different combinations of prediction modes corresponding to different prediction directions. Further, a prediction mode determining section selects a prediction mode from the prediction set thus selected. An entropy encoding section encodes the prediction set thus selected, the prediction mode thus selected, and residual data between an input image and a predicted image formed on the basis of the prediction set and the prediction mode. This allows an image encoding device to carry out predictions from more various angles, thereby improving prediction efficiency. | 04-17-2014 |
20140105289 | Efficient Architecture for Layered VDR Coding - In layered Visual Dynamic range (VDR) coding, inter-layer prediction requires several color-format transformations between the input VDR and Standard Dynamic Range (SDR) signals. Coding and decoding architectures are presented wherein inter-layer prediction is performed in the SDR-based color format, thus reducing computational complexity in both the encoder and the decoder, without compromising coding efficiency or coding quality. | 04-17-2014 |
20140105290 | METHOD AND APPARATUS FOR INTRA PREDICTION WITHIN DISPLAY SCREEN - The present invention relates to a method and apparatus for intra prediction. The intra prediction method for a decoder, according to the present invention, comprises the steps of entropy-decoding a received bitstream, generating reference pixels to be used in the intra prediction of a prediction unit; generating a prediction block from the reference pixels on the basis of a prediction mode for the prediction unit and reconstructing an image from the prediction block and a residual block, which is obtained as a result of entropy encoding, wherein the reference pixels and/or the prediction block pixels are predicted on the basis of a base pixel, and the predicted pixel value can be the sum of the pixel value of the base pixel and the difference between the pixel values of the base pixel and the generated pixel. | 04-17-2014 |
20140105291 | PICTURE CODING DEVICE, PICTURE CODING METHOD, PICTURE CODING PROGRAM, PICTURE DECODING DEVICE, PICTURE DECODING METHOD, AND PICTURE DECODING PROGRAM - There is provided a picture coding device that performs intra prediction coding of a picture signal including a luma signal and a chroma signal in units of blocks and codes information relating to an intra prediction mode. When the intra prediction of a picture signal is made in units of coding blocks, in a case where a chroma format is 4:2:2, in a mode for setting a chroma intra prediction mode in accordance with the luma intra prediction mode, an intra prediction unit sets the chroma intra prediction mode based on the luma intra prediction mode and the chroma format and makes an intra prediction of the chroma signal. | 04-17-2014 |
20140105292 | SYSTEM AND METHOD FOR INTRACODING VIDEO DATA - A video system for coding a stream of video data that includes a stream of video frames divides each video frame into a matrix of a plurality of subblocks, wherein each subblock includes a plurality of pixels. The video system operates in accordance with nine prediction modes. Each prediction mode determines a prediction mode according to which a present subblock is to be coded. One of the nine prediction modes is selected to encode the present subblock, wherein the selected prediction mode provides for a minimum error value in the present subblock. | 04-17-2014 |
20140105293 | SAMPLE ARRAY CODING FOR LOW-DELAY - The entropy coding of a current part of a predetermined entropy slice is based on, not only, the respective probability estimations of the predetermined entropy slice as adapted using the previously coded part of the predetermined entropy slice, but also probability estimations as used in the entropy coding of a spatially neighboring, in entropy slice order preceding entropy slice at a neighboring part thereof. Thereby, the probability estimations used in entropy coding are adapted to the actual symbol statistics more closely, thereby lowering the coding efficiency decrease normally caused by lower-delay concepts. Temporal interrelationships are exploited additionally or alternatively. | 04-17-2014 |
20140112388 | ENCODING AND DECODING METHODS AND APPARATUSES - The present disclosure provides a method for encoding an intra-frame prediction mode, including: obtaining an intra-frame prediction mode of a current intra-frame encoding block from a preset prediction mode set; obtaining reference prediction modes of the current intra-frame encoding block, where the reference prediction modes are intra-frame prediction modes of available adjacent blocks of the current intra-frame encoding block or prediction modes in a preset backup reference mode set; writing a first flag bit into a code stream according to the reference prediction modes and the intra-frame prediction mode; and, when the intra-frame prediction mode of the encoding block is different from all the reference prediction modes, obtaining a prediction mode encoding value according to a size relationship between the value of the intra-frame prediction mode and values of the reference prediction modes, and encoding the prediction mode encoding value. | 04-24-2014 |
20140112389 | VIDEO ENCODING METHOD, VIDEO ENCODING APPARATUS, VIDEO DECODING METHOD AND VIDEO DECODING APPARATUS - Accordingly, a video encoding method, apparatus and other aspects are disclosed. A reference picture set is written into a header of the bit stream, the reference picture set including reference pictures, a time identifier, a usage identifier and at least one parameter representing at least one of scale and view. A reference picture list having one or more of the reference pictures is constructed. A block of the video is encoded from a reference picture associated with a reference index in the reference picture list. The reference index is written into the bit stream. | 04-24-2014 |
20140119436 | SYSTEM AND METHOD FOR DECODING SCALABLE VIDEO CODING - A system and method for decoding video encoded using scalable video coding. In one embodiment, a decoder for scalable video coding (SVC) includes an SVC access unit analyzer and decoding logic. The SVC access unit analyzer is configured to examine an SVC access unit prior to layered decoding of the access unit, to determine, based on the examination, what operations the access unit specifies for each layer of the decoding, and to determine, based on the determined operations to be performed for each layer of the decoding, what data to store for use by a subsequent layer of the decoding. The decoding logic is configured to decode the access unit via a plurality of decoding layers; and to store at each decoding layer, for use by a subsequent decoding layer, the data determined by the SVC access unit analyzer to be used by the subsequent decoding layer. | 05-01-2014 |
20140119437 | TARGET OUTPUT LAYERS IN VIDEO CODING - In one example, a device includes a video coder configured to code a multilayer bitstream comprising a plurality of layers of video data, where the plurality of layers of video data are associated with a plurality of layer sets, and where each layer set contains one or more layers of video data of the plurality of layers, and to code on one or more syntax elements of the bitstream indicating one or more output operation points, where each output operation point is associated with a layer set of the plurality of layer sets and one or more target output layers of the plurality of layers. | 05-01-2014 |
20140119438 | SYSTEM AND METHOD FOR RELATIVE STORAGE OF VIDEO DATA - System and method for compressing and decompressing of differentially encoded video streams. I-frames of the encoded video stream may be relatively compressed and decompressed, thereby reducing video data size of an already encoded video stream. Compression and decompression may be lossless processes and may typically require relatively low processing power and small memory sizes. | 05-01-2014 |
20140119439 | METHOD AND APPARATUS OF INTRA MODE CODING - Method and apparatus for intra prediction mode coding and decoding are disclosed. In one embodiment, the encoding and decoding process assigns individual indices and codewords to DC mode and Planar mode respectively. The flag is set if the current intra prediction mode is equal to any of one or more neighboring intra prediction modes. Variable length codes are designed for a remaining mode set. If the flag is not set, the currently intra prediction mode is encoded using the variable length codes. In another embodiment, multiple most probable modes are used. If the current intra prediction mode is not equal to any of the multiple most probable modes, the current intra prediction mode is encoded using variable length codes designed for the corresponding remaining modes according the ranking order of the remaining modes. | 05-01-2014 |
20140119440 | METHOD FOR CODING AND DECODING SCALABLE VIDEO AND APPARATUS USING SAME - The present invention relates to a method and an apparatus for interlayer intra-prediction, and the method for interlayer intra-prediction, according to the present invention, comprises the steps of: deciding whether to apply an interlayer prediction to an enhancement layer; and performing a prediction on a current block of the enhancement layer based on reference information that is generalized and generated from a reference picture, which is decoded, of a reference layer, when the interlayer prediction is applied. | 05-01-2014 |
20140119441 | METHOD FOR CODING AND DECODING SCALABLE VIDEO AND APPARATUS USING SAME - The present invention relates to a method and an apparatus for interlayer prediction, and the method for interlayer prediction, according to the present invention, comprises the steps of: deciding whether to apply an interlayer prediction to an enhancement layer; and performing a prediction on a current block of the enhancement layer based on reference information that is generalized and generated from a reference picture, which is decoded, of a reference layer, when the interlayer prediction is applied, wherein the reference layer information can be encoding information of a reference block, which corresponds to a current block of the enhancement layer, from the reference layer, and residual information. | 05-01-2014 |
20140119442 | METHOD AND APPARATUS FOR MOTION COMPENSATION PREDICTION - The invention relates to a motion compensation performed under an inter-frame prediction. A fractional sample interpolation is applied on retrieved samples to generate fractional samples. The fractional sample interpolation comprises a plurality of filtering operations, and all of filtered results from the filtering operations are truncated down to a predetermined bit depth independent of the bit depth of the samples stored in the reference picture memory. | 05-01-2014 |
20140119443 | IMAGE DECODING APPARATUS - A method for encoding an intra prediction mode according to the present invention selects an intra prediction mode for a current block, determines the number of valid MPM candidates by checking the validity of MPM candidates of the current block, and if the number of valid MPM candidates is less than a previously set number, adds additional intra prediction modes as MPM candidates. MPM candidates can be adaptively added on the basis of the directionality of valid MPM candidates. Additionally, during the encoding of residual intra prediction modes, residual intra prediction modes are realigned on the basis of the directionality of valid MPM candidates. Accordingly, the present invention allows the information for encoding the intra prediction mode of the current block to be minimized by adding MPM candidates or realigning the residual intra prediction modes on the basis of the directionality of valid MPM candidates. | 05-01-2014 |
20140119444 | Intra Frame Predication Scanning Method for Video Coding and Video Coding Method - An intra frame predication scanning method for video coding includes steps of: providing a two-dimensional residual coefficient array of a pixel block; dividing the two-dimensional residual coefficient array into a plurality of sub-arrays; converting, in a predetermined order, residual coefficients in the respective sub-array into a one-dimensional individual-sub-array residual coefficient series; connecting the one-dimensional individual-sub-array residual coefficient series of all the sub-arrays as a one-dimensional all-sub-array residual coefficient series of the pixel block; and performing an entropy coding on the one-dimensional all-sub-array residual coefficient series. A video coding method is also provided. | 05-01-2014 |
20140126633 | PIXEL PREDICTION METHOD AND APPARATUS - A method for pixel prediction is provided. The method includes: obtaining an average pixel value of reference pixel points on a long side of a current block if the current block is rectangular and coded or decoded adjacent blocks of the current block are all available, where the reference pixel points are all located at boundaries of the adjacent blocks near the current block; and obtaining a prediction pixel value of the current block according to the average pixel value of the reference pixel points on the long side. According to the pixel prediction method and apparatus provided in the embodiments of the present invention, a prediction pixel is obtained from corresponding adjacent blocks according to a shape of the current block, meeting a pixel distribution rule. | 05-08-2014 |
20140126634 | OPTIMIZATION OF INTRA BLOCK SIZE IN VIDEO CODING - In video coding, selecting an optimal intra block size based on minimal activity directions and strengths. The method is directed to simplifying the procedure of choosing the best subdivision of a texture block into intra blocks. | 05-08-2014 |
20140126635 | OPTIMAL INTRA PREDICTION IN BLOCK-BASED VIDEO CODING - Simplified selection of optimal intra prediction in block-based video coding based on texture gradient distribution and minimal activity direction. The minimal activity direction is defined by a vector (α(B, W), β(B, W)) indicating minimal variation of a discrete function P(x, y) inside a spatial aria of block B with weights W. | 05-08-2014 |
20140133554 | ADVANCED VIDEO CODING METHOD, APPARATUS, AND STORAGE MEDIUM - An advanced video coding method, apparatus, and storage medium are provided utilizing advanced edge detection, object of interest identification, pixel tracking of the object of interest, sharpening, and motion estimation. | 05-15-2014 |
20140133555 | DETECTION OF SKIP MODE - A method to quickly determine whether a macroblock in H.264 or other similar standards should be encoded in skip mode in a SIMD processor environment is provided. The method exploits the fact that the processor provides enough register space to store N=4 4x4 set of 8 bits data. By performing 4 consecutive reads of 16 linear aligned values into 16 SIMD register variables each capable of storing 16 values, the entire data set for operating can be stored within the processors SIMD register variables and can be operated upon, without any memory related latency. | 05-15-2014 |
20140133556 | MPEG FRAME COMPATIBLE VIDEO CODING - In an example, a video coder may determine a first layer component of a first layer of video data, wherein the first layer of video data is associated with a layer identifier. The video coder may generate at least one filtered layer component by filtering the first layer component, and assign the layer identifier of the first layer and a filtered layer component index to the at least one filtered layer component, where the filtered layer component index is different than a layer component index of the first layer component. The video coder may also add the at least one filtered layer component to a reference picture set for performing inter-layer prediction of a layer other than the first layer of video data. | 05-15-2014 |
20140133557 | IMAGE PREDICTION ENCODING DEVICE, IMAGE PREDICTION DECODING DEVICE, IMAGE PREDICTION ENCODING METHOD, IMAGE PREDICTION DECODING METHOD, IMAGE PREDICTION ENCODING PROGRAM, AND IMAGE PREDICTION DECODING PROGRAM - The image predictive encoding device | 05-15-2014 |
20140133558 | METHOD AND APPARATUS FOR CODING VIDEO AND METHOD AND APPARATUS FOR DECODING VIDEO, USING INTRA PREDICTION - A video decoding method involving intra prediction includes: parsing a most probable mode (MPM) flag of a block while parsing symbols of the block of an encoded video from a received bitstream; determining whether a predetermined number of a plurality of candidate intra prediction modes are used to predict an intra prediction mode of the block based on the MPM flag; when it is determined that the plurality of candidate intra prediction modes are used based on the MPM flag, determining the plurality of candidate intra prediction modes based on intra prediction modes of a left block and an upper block that are adjacent to the block while restoring the intra prediction mode of the block by using the parsed symbols. | 05-15-2014 |
20140133559 | METHOD FOR ENCODING IMAGE INFORMATION AND METHOD FOR DECODING SAME - The present invention relates to a method for encoding image information, to a method for decoding same, and to an apparatus using the methods. The method for decoding the image information according to one embodiment of the present invention comprises the steps of: dividing a prediction area into a first prediction area and a second prediction area according to an intra-prediction mode; performing intra prediction on, and restoration of, the first prediction area; and performing prediction on, and restoration of, the second prediction area. In the step of performing prediction on, and restoration of, the second prediction area, intra-prediction on the second prediction area can be performed with reference to a reference sample for the first prediction area or with reference to a predetermined sample in the restored first prediction area. | 05-15-2014 |
20140133560 | INTER PREDICTION METHOD AND APPARATUS FOR SAME - According to the present invention, an image encoding apparatus comprises: a motion prediction unit which derives motion information on a current block in the form of the motion information including L0 motion information and L1 motion information; a motion compensation unit which performs a motion compensation for the current block on the basis of at least one of the L0 motion information and L1 motion information so as to generate a prediction block corresponding to the current block; and a restoration block generating unit which generates a restoration block corresponding to the current block based on the prediction block. According to the present invention, image encoding efficiency can be improved. | 05-15-2014 |
20140133561 | PICTURE ENCODING METHOD AND PICTURE DECODING METHOD - A picture encoding method of the present invention is a picture encoding method of predictively encoding an input picture with reference to pictures stored in a picture buffer, decoding the encoded input picture, judging whether or not the decoded picture is a picture for reference and whether or not the decoded picture is a picture for output which needs to be stored until its display time, and storing, in the picture buffer, the picture for reference and the picture for output based on the determination result. | 05-15-2014 |
20140133562 | IMAGE CODING METHOD, IMAGE CODING APPARATUS, IMAGE DECODING METHOD AND IMAGE DECODING APPARATUS - An apparatus is provided for decoding last position information indicating a horizontal position and a vertical position of a last non-zero coefficient in a predetermined order within a current block to be decoded, the current block being included in a picture and including a plurality of coefficients. The apparatus includes one or more processors, a communication unit, and storage coupled to the one or more processors and the communication unit. The communication unit is configured to transmit a request for a bitstream to an external system, and receive the bitstream from the external system. The one or more processors are configured to obtain the bitstream, perform first arithmetic decoding, perform second arithmetic decoding, derive a horizontal component of the last position information, and derive a vertical component of the last position. A system for decoding and a displaying method are also provided. | 05-15-2014 |
20140133563 | METHOD AND APPARATUS FOR ENCODING VIDEO IN CONSIDERATION OF SCANNING ORDER OF CODING UNITS HAVING HIERARCHICAL STRUCTURE, AND METHOD AND APPARATUS FOR DECODING VIDEO IN CONSIDERATION OF SCANNING ORDER OF CODING UNITS HAVING HIERARCHICAL STRUCTURE - A method and apparatus for decoding a video and a method and apparatus for encoding a video are provided. The method for decoding the video includes: receiving and parsing a bitstream of an encoded video; extracting, from the bitstream, encoded image data of a current picture of the encoded video assigned to a maximum coding unit, and information about a coded depth and an encoding mode according to the maximum coding unit; and decoding the encoded image data for the maximum coding unit based on the information about the coded depth and the encoding mode for the maximum coding unit, in consideration of a raster scanning order for the maximum coding unit and a zigzag scanning order for coding units of the maximum coding unit according to depths. | 05-15-2014 |
20140133564 | ENCODING/DECODING APPARATUS AND METHOD USING FLEXIBLE DEBLOCKING FILTERING - A video decoding method includes decoding a bitstream including generating a quantized frequency transform block from the bitstream, reconstructing a residual block by inversely quantizing and inversely transforming the quantized frequency transform block, generating a prediction block by predicting a current block to be reconstructed, reconstructing the current block by adding the generated prediction block to the reconstructed residual block and performing a deblocking filtering with respect to a boundary between subblocks within a frame including the reconstructed current block, by allowing numbers of filtered pixels in a first block of the subblocks and a second block of the subblocks that engage in the filtering to be different depending on one or more predetermined criterion. | 05-15-2014 |
20140140397 | LOGIC DEVICES, DIGITAL FILTERS AND VIDEO CODECS INCLUDING LOGIC DEVICES, AND METHODS OF CONTROLLING LOGIC DEVICES - A logic device includes: a function block and a configuration block. The function block is configurable to perform operations associated with a plurality of operation modes. The configuration block is configured to configure the function block to perform an operation associated with any one of the plurality of operation modes. The logic device also includes a controller configured to control the configuration block so that the function block is configured to perform the operation. | 05-22-2014 |
20140140398 | SIGNALING SCALABILITY INFORMATION IN A PARAMETER SET - A system for decoding a video bitstream includes receiving a frame of the video that includes at least one slice and at least one tile and where each of the at least one slice and the at least one tile are not all aligned with one another. | 05-22-2014 |
20140140399 | LOW-COMPLEXITY SUPPORT OF MULTIPLE LAYERS FOR HEVC EXTENSIONS IN VIDEO CODING - A method of coding video data includes receiving video information associated with a first layer and a second layer and determining whether at least one of the first layer and the second layer is a default layer. The method can include at least partially restricting inter-layer prediction when neither the first layer nor the second layer is the default layer. A default layer can be a base layer or an enhancement layer. A flag can be received that indicates that inter-layer prediction is to be restricted. In addition, the method can include determining whether inter-layer prediction is allowed for the video information associated with the first layer, and determining whether inter-layer prediction is partially allowed for the video information associated with the second layer such that motion compensation is not used with the second layer video information. | 05-22-2014 |
20140140400 | ENTROPY CODING SUPPORTING MODE SWITCHING - A decoder for decoding a data stream into which media data is coded has a mode switch configured to activate a low-complexity mode or a high-efficiency mode depending on the data stream, an entropy decoding engine configured to retrieve each symbol of a sequence of symbols by entropy decoding using a selected one of a plurality of entropy decoding schemes, a desymbolizer configured to desymbolize the sequence of symbols to obtain a sequence of syntax elements, a reconstructor configured to reconstruct the media data based on the sequence of syntax elements, selection depending on the activated low-complexity mode or the high-efficiency mode. In another aspect, a desymbolizer is configured to perform desymbolization such that the control parameter varies in accordance with the data stream at a first rate in case of the high-efficiency mode being activated and the control parameter is constant irrespective of the data stream or changes depending on the data stream, but at a second lower rate in case of the low-complexity mode being activated. | 05-22-2014 |
20140140401 | PREDICTION METHOD AND APPARATUS FOR CHROMA COMPONENT OF IMAGE USING LUMA COMPONENT OF IMAGE - Provided are a method and an apparatus for predicting a chrominance signal from a luminance signal by using a correlation between the luminance and chrominance signals. A method of predicting a chrominance component image generates a down-sampled luminance signal matching a chrominance signal by independently applying various down-sampling methods according to a location of a luminance signal, and predicts a chrominance signal from the down-sampled luminance signal, while considering a size of a luminance prediction unit and a size of a chrominance prediction unit corresponding to each other according to a color format. | 05-22-2014 |
20140140402 | METHOD AND APPARATUS FOR SELECTING A CODING MODE - A method and apparatus for selecting a coding mode are described. For example, the method receives at least one block of a signal to be encoded. The method determines a frame vertical pixel difference in the at least one block and determines a field vertical pixel difference in the at least one block. The method then compares the frame vertical pixel difference with the field vertical pixel difference to determine a first coding mode for the at least one block. | 05-22-2014 |
20140140403 | Methods and Systems for Encoding and Decoding Wide Color-Gamut Video - Aspects of the present invention relate to systems and methods for capturing, encoding and decoding wide color-gamut video. According to a first aspect of the present invention, a plurality of processed image frames are associated with a legacy bit-stream, and a plurality of unprocessed image frames are associated with an enhancement bit-stream. | 05-22-2014 |
20140140404 | METHOD AND APPARATUS FOR INTRA PREDICTION USING NON-SQUARE BLOCKS - A method and apparatus for Intra prediction of a block based on neighboring pixels around the block are disclosed. Embodiments according to the present invention use square blocks as well as non-square blocks for Intra prediction. For a 2N×2N Luma CU (coding unit), the CU can be partitioned into 2N×N, N×2N, 2N×2N or N×N PUs. The 2N×N and N×2N PUs can be further processed by either square transforms only or both non-square and square transforms. In one embodiment, the 2N×N PU or the N×2N PU is processed as two N×N TUs (transform units) and each of the N×N TU is further split into smaller N×N TUs based on quad-tree split. In another embodiment, the 2N×N and N×2N PUs are processed as two 2N×0.5N and 0.5N×2N TUs respectively. | 05-22-2014 |
20140146883 | BANDWIDTH SAVING ARCHITECTURE FOR SCALABLE VIDEO CODING SPATIAL MODE - A system and method for scalable video coding that includes base layer having lower resolution encoding, enhanced layer having higher resolution encoding and the data transferring between two layers. The system and method provides several methods to reduce bandwidth of inter-layer transfers while at the same time reducing memory requirements. Due to less memory access, the system clock frequency can be lowered so that system power consumption is lowered as well. The system avoids having prediction data from base layer to enhanced layer to be up-sampled for matching resolution in the enhanced layer as transferring up-sampled data can impose a big burden on memory bandwidth. | 05-29-2014 |
20140146884 | FAST PREDICTION MODE DETERMINATION METHOD IN VIDEO ENCODER BASED ON PROBABILITY DISTRIBUTION OF RATE-DISTORTION - The present invention provides a fast prediction mode determination method of a video encoder that may remove an unnecessary operation of an encoder by selectively terminating early or omitting a splitting process and a pruning process based on a probability distribution of rate-distortion values, and thereby enables the encoder to quickly determine a prediction mode. The present invention may include a method that may adaptively change a termination and omission determination criterion of the splitting process and the pruning process based on a characteristic of an input image. When using the method provided by the present invention, reliability regarding the termination and omission determination of the splitting process and the pruning process may be set and thus, it is possible to adjust the tradeoff between a decrease in an operation amount and a quality degradation of the encoder. | 05-29-2014 |
20140146885 | METHOD AND APPARATUS FOR MULTIPLEXING AND DEMULTIPLEXING VIDEO DATA TO IDENTIFY REPRODUCING STATE OF VIDEO DATA - A method and apparatus for multiplexing and de-multiplexing video data. The method of multiplexing the video data involves syntax to a header of transmission unit data that is used to multiplex a clean random access (CRA) picture used in a random access, wherein the predetermined syntax indicates a reproduction status of the CRA picture, i.e., normal reproduction or reproduction according to a random access. | 05-29-2014 |
20140146886 | METHOD AND APPARATUS FOR ENCODING VIDEO IN CONSIDERATION OF SCANNING ORDER OF CODING UNITS HAVING HIERARCHICAL STRUCTURE, AND METHOD AND APPARATUS FOR DECODING VIDEO IN CONSIDERATION OF SCANNING ORDER OF CODING UNITS HAVING HIERARCHICAL STRUCTURE - A method and apparatus for decoding a video and a method and apparatus for encoding a video are provided. The method for decoding the video includes: receiving and parsing a bitstream of an encoded video; extracting, from the bitstream, encoded image data of a current picture of the encoded video assigned to a maximum coding unit, and information about a coded depth and an encoding mode according to the maximum coding unit; and decoding the encoded image data for the maximum coding unit based on the information about the coded depth and the encoding mode for the maximum coding unit, in consideration of a raster scanning order for the maximum coding unit and a zigzag scanning order for coding units of the maximum coding unit according to depths. | 05-29-2014 |
20140146887 | PICTURE ENCODING METHOD, PICTURE DECODING METHOD, PICTURE ENCODING APPARATUS, PICTURE DECODING APPARATUS, PICTURE ENCODING PROGRAM, AND PICTURE DECODING PROGRAM - The encoding computational complexity and the decoding computational complexity are reduced while suppressing deterioration of coding efficiency in comparison with conventional intra divided-picture coding. A divided picture generation unit divides an input encoding target picture into blocks having the same size, and collects pixels having the same relative position in the blocks to generate divided pictures having the same size. An intra divided-picture encoding unit performs intra divided-picture encoding on some divided pictures. A reference picture selection unit selects, as a reference picture, an encoded divided picture in which a pixel position on an original picture is close in order to encode the other encoding target divided pictures. An inter divided-picture predictive encoding unit generates a predicted picture using the selected reference picture and encodes an encoding target divided picture through inter divided-picture prediction in units of divided pictures. | 05-29-2014 |
20140153644 | DYNAMIC SLICE RESIZING WHILE ENCODING VIDEO - An apparatus having a plurality of processors is disclosed. The processors may be configured to (i) gather a plurality of statistics by encoding a current picture in a video signal, (ii) calculate a plurality of complexity values in response to both the statistics and a plurality of coefficients and (iii) partition a next picture in the video signal into a plurality of slices in response to the complexity values such that each of the slices has a similar coding complexity. The statistics generally characterize how the current picture was encoded. The coefficients may correspond to a plurality of coding modes. | 06-05-2014 |
20140153645 | 3D VIDEO CODING INCLUDING DEPTH BASED DISPARITY VECTOR CALIBRATION - Systems, apparatus, articles, and methods are described including operations for 3D video coding including depth based disparity vector calibration. | 06-05-2014 |
20140153646 | VIDEO ENCODING METHOD WITH INTRA PREDICTION USING CHECKING PROCESS FOR UNIFIED REFERENCE POSSIBILITY, VIDEO DECODING METHOD AND DEVICE THEREOF - An intra prediction method includes searching for a neighboring block restored prior to a current block from among blocks of an image; checking whether the neighboring block found by the searching is a block restored in an intra mode and whether an intra mode of the current block is also a Combined Intra Prediction (CIP) mode in which only blocks pre-restored in the intra mode are referred to; determining based on a checking result of the checking whether the found neighboring block is a reference block available for intra prediction of the current block; and performing intra prediction on the current block by using sample values of the reference block determined as available for the intra prediction of the current block. | 06-05-2014 |
20140161179 | DEVICE AND METHOD FOR SCALABLE CODING OF VIDEO INFORMATION BASED ON HIGH EFFICIENCY VIDEO CODING - An apparatus configured to code video information includes a memory unit and a processor in communication with the memory unit. The memory unit is configured to store video information associated with an enhancement layer having a first block and a base layer having a second block, the second block in the base layer corresponding to the first block in the enhancement layer. The processor is configured to predict, by inter layer prediction, the first block in the enhancement layer based on information derived from the second block in the base layer. At least a portion of the second block is located outside of a reference region of the base layer, the reference region being available for use for the inter layer prediction of the first block. The processor may encode or decode the video information. | 06-12-2014 |
20140161180 | PICTURE CODING DEVICE, PICTURE CODING METHOD AND PICTURE CODING PROGRAM AS WELL AS PICTURE DECODING DEVICE, PICTURE DECODING METHOD, AND PICTURE DECODING PROGRAM - A prediction direction difference calculating unit derives a prediction direction difference in intra prediction modes of a plurality of reference blocks used for an intra prediction processing of a block to be coded. A most probable mode determining unit and a coding tree selecting unit determine a most probable mode as an intra prediction mode candidate of the block to be coded based on the intra prediction modes of the reference blocks used for deriving the prediction direction difference and the prediction direction difference, and creates a coding tree assigned with a bitstream having a shorter code length than other prediction modes for the determined most probable mode. A variable length coding unit codes information for specifying an intra prediction mode of the block to be coded according to the coding tree. | 06-12-2014 |
20140161181 | DECODING AND ENCODING OF PICTURES OF A VIDEO SEQUENCE - The embodiments reduce output delay for pictures by determining after a current picture has been decoded and stored in a decoded picture buffer, DPB, a number of pictures in the DPB that are marked as needed for output. This number is compared, after a current picture has been decoded and stored in the DPB against a value derived from at least one syntax element present or to be present in a bitstream representing pictures of a video sequence. If this number is greater than the value a picture, which is the first picture in output order, of the pictures in the DPB that are marked as needed for output is preferably output and marked as not needed for output. | 06-12-2014 |
20140161182 | MOVING IMAGE ENCODING METHOD, MOVING IMAGE ENCODING APPARATUS, AND COMPUTER-READABLE MEDIUM - A slice division structure control unit ( | 06-12-2014 |
20140161183 | METHOD AND APPARATUS TO PRIORITIZE VIDEO INFORMATION DURING CODING AND DECODING - A method and apparatus prioritizing video information during coding and decoding. Video information is received and an element of the video information, such as a visual object, video object layer, video object plane or keyregion, is identified. A priority is assigned to the identified element and the video information is encoded into a bitstream, such as a visual bitstream encoded using the MPEG-4 standard, including an indication of the priority of the element. The priority information can then be used when decoding the bitstream to reconstruct the video information | 06-12-2014 |
20140169457 | PERFORMANCE CONTROL IN VIDEO ENCODING - An apparatus having a circuit is disclosed. The circuit may be configured to (i) generate a complexity value by encoding a current picture in a video signal, where the current picture is encoded using a current one of a plurality of configurations, (ii) calculate an estimate in response to the complexity value and (iii) reconfigure the encoding into a new one of the configurations in response to the estimate relative to one or more thresholds. The configurations may include a normal configuration and one or more simplified configurations. The estimate generally describes a computational stress that the encoding of the current picture placed on the circuit. The new configuration may be different from the current configuration. | 06-19-2014 |
20140169458 | DEVICES AND METHODS FOR USING BASE LAYER INTRA PREDICTION MODE FOR ENHANCEMENT LAYER INTRA MODE PREDICTION - Devices and methods for using base layer intra prediction mode for enhancement layer intra mode prediction are disclosed. | 06-19-2014 |
20140169459 | METHOD AND APPARATUS OF REFERENCE PICTURE MANAGEMENT FOR VIDEO CODING - A method and apparatus that determine one or more reference pictures for the current image unit and indicate the reference pictures using information associated with COIs (coding order indexes) of the reference pictures are disclosed. The image unit corresponds to a picture, a slice of the picture, or a region of the picture. Inter-picture encoding or decoding is applied to the input data using the reference pictures. The information associated with the COIs can be incorporated in a slice header or a picture header of a bitstream associated with the video sequence. Furthermore, the COI can be represented by a coded COI using a fixed number of bits, wherein the coded COI is constrained to a range from 0 to MAC_COI-1 and MAX_COI is a positive integer. | 06-19-2014 |
20140169460 | IMAGE ENCODING APPARATUS AND IMAGE DECODING APPARATUS - According to one embodiment, an image encoding apparatus includes a setting unit configured to set a combination of a vertical transform matrix and a horizontal transform matrix corresponding to the target image. The combination includes any of a plurality of transform matrices including a first transform matrix and a second transform matrix which increases a coefficient density compared to the first transform matrix if a one-dimensional orthogonal transformation in a direction orthogonal to a line of a group of reference pixels on at least one line is performed on the prediction error in the intra-prediction mode in which the group of reference pixels is referenced to generate an intra-prediction image. | 06-19-2014 |
20140169461 | IMAGE ENCODING APPARATUS AND IMAGE DECODING APPARATUS - According to one embodiment, an image encoding apparatus includes a setting unit configured to set a combination of a vertical transform matrix and a horizontal transform matrix corresponding to the target image. The combination includes any of a plurality of transform matrices including a first transform matrix and a second transform matrix which increases a coefficient density compared to the first transform matrix if a one-dimensional orthogonal transformation in a direction orthogonal to a line of a group of reference pixels on at least one line is performed on the prediction error in the intra-prediction mode in which the group of reference pixels is referenced to generate an intra-prediction image. | 06-19-2014 |
20140169462 | MOVING-PICTURE ENCODING APPARATUS AND MOVING-PICTURE DECODING APPARATUS - According to one embodiment, an encoding apparatus includes a prediction unit, a classifying unit, a first transformer, a second transformer, an order controller, and an entropy coder. The prediction unit obtains a predictive residual signal to be encoded, by using a mode selected from intra-prediction modes. The first transformer obtains first transformation coefficients by subjecting the signal to an orthogonal transformation by use of a first transformation basis if the selected mode is classified into a mode having a prediction direction. The first transformation basis is preset so that a coefficient density after the orthogonal transformation is higher than a coefficient density. | 06-19-2014 |
20140169463 | MOVING-PICTURE ENCODING APPARATUS AND MOVING-PICTURE DECODING APPARATUS - According to one embodiment, an encoding apparatus includes a prediction unit, a classifying unit, a first transformer, a second transformer, an order controller, and an entropy coder. The prediction unit obtains a predictive residual signal to be encoded, by using a mode selected from intra-prediction modes. The first transformer obtains first transformation coefficients by subjecting the signal to an orthogonal transformation by use of a first transformation basis if the selected mode is classified into a mode having a prediction direction. The first transformation basis is preset so that a coefficient density after the orthogonal transformation is higher than a coefficient density. | 06-19-2014 |
20140169464 | MOVING-PICTURE ENCODING APPARATUS AND MOVING-PICTURE DECODING APPARATUS - According to one embodiment, an encoding apparatus includes a prediction unit, a classifying unit, a first transformer, a second transformer, an order controller, and an entropy coder. The prediction unit obtains a predictive residual signal to be encoded, by using a mode selected from intra-prediction modes. The first transformer obtains first transformation coefficients by subjecting the signal to an orthogonal transformation by use of a first transformation basis if the selected mode is classified into a mode having a prediction direction. The first transformation basis is preset so that a coefficient density after the orthogonal transformation is higher than a coefficient density. | 06-19-2014 |
20140169465 | VIDEO DECODING METHOD AND IMAGE ENCODING METHOD - A video decoding method and image encoding method capable of utilizing a portion of the prediction image predicted in a size larger than the size of the macroblock of the encoding target, as the prediction image of the macroblock of the encoding target in order to lower the compression ratio in image coding accompanied by expansion and contraction of blocks containing coding units. | 06-19-2014 |
20140169466 | METHOD AND VIDEO DECODER FOR DECODING SCALABLE VIDEO STREAM USING INTER-LAYER RACING SCHEME - One exemplary method for decoding a scalable video stream, including a base layer frame and at least an enhancement layer frame corresponding to the base layer frame, has the following steps: decoding the base layer frame; and before the base layer frame is fully decoded, decoding the enhancement layer frame. Another exemplary method for decoding a scalable video stream, including a base layer frame and at least an enhancement layer frame corresponding to the base layer frame, has the following steps: decoding the enhancement layer frame, and decoding the base layer frame; wherein a start point of decoding the enhancement layer frame is earlier than a start point of decoding the base layer frame. | 06-19-2014 |
20140177708 | METHOD AND APPARATUS FOR ENTROPY ENCODING/DECODING - Provided are methods and apparatuses for entropy-encoding and entropy-decoding an image. The method for entropy-encoding an image includes operations of arithmetically encoding a binary value of a current coding symbol, by using a probability of a predefined binary value which is determined based on previously-coded symbols that are encoded before the current coding symbol; and updating the probability of the predefined binary value by using a plurality of scaling factors, according to the binary value of the current coding symbol. | 06-26-2014 |
20140177709 | IMAGE ENCODING APPARATUS, IMAGE ENCODING METHOD AND COMPUTER PROGRAM - To reduce power consumption in an encoding process without extremely lowering encoding efficiency, a chrominance of each pixel of a prediction block is derived as a reference chrominance block according to a chrominance intra prediction mode from a reference chrominance sample representing a chrominance of a pixel necessary for intra encoding, a difference between the reference chrominance block and a chrominance sample of an input encoding block is derived as a chrominance prediction residual, and an evaluation value of the chrominance prediction residual is derived. This process is performed to a candidate of the chrominance intra prediction mode adoptable irrespective of a luminance intra prediction mode. The chrominance intra prediction mode corresponding to the evaluation value when this evaluation value is equal to or smaller than a threshold is adopted as the chrominance intra prediction mode of the prediction block. | 06-26-2014 |
20140177710 | VIDEO IMAGE COMPRESSION/DECOMPRESSION DEVICE - An image compression/decompression device achieving increased utilization efficiency of the memory bandwidth in the access to the memory used for the compression/decompression operation while maintaining ill effect on the images at a low level is realized. The image compression/decompression device comprises a data conversion unit which reduces the data access rate when original images (as input images at the time of performing the compression) and reference images (used for performing the interframe prediction) are stored in the memory by accessing the memory. The access to the memory is performed in an address sequence (order) that differs between data write and data read. This makes it possible to increase the utilization efficiency of the memory bandwidth, and further to reduce the capacity of the buffer memory used for the data read. | 06-26-2014 |
20140177711 | VIDEO ENCODING AND DECODING METHOD AND APPARATUS USING THE SAME - Disclosed is technology associated with video encoding and decoding having a structure including one or more layers (quality, spatial, and view) and technology associated with a method that predicts an higher layer signal by using one or more reference layers in encoding and decoding an higher layer. In more detail, an interlayer prediction is capable of being performed by considering a characteristic of each layer by separating a spatial and quality reference layer list constituted by spatial and quality layers to be referred at the same view as a target layer and a view reference layer list constituted by the same spatial and quality layers as a target layer in encoding and decoding encoding and decoding pictures of an higher layer in encoding and decoding encoded and decoded pictures of the higher layer to improve encoding and decoding efficiency. | 06-26-2014 |
20140177712 | METHOD OF ENCODING/DECODING OF MULTIVIEW VIDEO SEQUENCE BASED ON ADAPTIVE COMPENSATION OF LOCAL ILLUMINATION MISMATCHES AT INTERFRAME PREDICTION - A technology for processing digital signals is provided, and more particularly, a method of encoding or decoding a multiview video sequence based on adaptive compensation of local illumination mismatches between frames of the multiview video sequence is provided. The method may be performed using a correction parameter used to correct a change in illumination. The correction parameter may be computed based on at least one of a first estimate estD | 06-26-2014 |
20140177713 | METHOD AND DEVICE FOR DETERMINING TRANSFORM BLOCK SIZE - Embodiments of the present invention provide a method and a device for determining a transform block size, and can improve image compression efficiency. The method includes: obtaining, according to image block information and a splitting manner of an image block, a parameter of a transform block corresponding to the image block; and obtaining a transform block size according to the parameter of the transform block and the splitting manner of the image block. In the embodiments of the present invention, during determination of a transform block size, the transform block size is obtained according to a splitting manner of an image block and a parameter of a transform block corresponding to the image block. Therefore, a transform block matching the splitting manner of the image block can be used, improving image compression efficiency. | 06-26-2014 |
20140177714 | CODING VIDEO DATA WITH AN ALTERNATE REFERENCE FRAME GENERATED USING A TEMPORAL FILTER - Implementations of the teachings herein include coding video data with an alternate reference frame generated using a temporal filter. The alternate reference frame is generated by determining a first weighting factor, for each corresponding block of a respective frame of a filter set, that represents a temporal correlation of the block with the corresponding block, determining a second weighting factor, for each pixel for each corresponding block of the respective frame of the filter set, that represents a temporal correlation of the pixel to a spatially-correspondent pixel in the block, determining a filter weight for each pixel in the block and for each spatially-correspondent pixel is each corresponding block based on the first weighting factor and the second weighting factor, and generating a weighted average pixel value for each pixel position in the block to form a block of the alternate reference frame based on the filter weights. | 06-26-2014 |
20140185669 | INTER-LAYER CODING UNIT QUADTREE PATTERN PREDICTION - Systems, apparatus, articles, and methods are described including operations for inter-layer coding unit quadtree pattern prediction. | 07-03-2014 |
20140185670 | PROGRESSIVE REFINEMENT WITH TEMPORAL SCALABILITY SUPPORT IN VIDEO CODING - An example method of decoding video data includes receiving information indicating a picture order count (POC) value of a last picture of a plurality of pictures in a progressive refinement segment in an encoded bitstream, and decoding at least some of the pictures in the progressive refinement segment according to a progressive refinement operation based on the received information. | 07-03-2014 |
20140185671 | VIDEO ENCODING AND DECODING METHOD AND APPARATUS USING THE SAME - Disclosed is a video decoding method supporting a plurality of layers including: decoding a first layer which is referred by a target block of a second layer to be decoded; determining a size of the target block of the second layer which uses information on the first layer; and performing prediction for the target block by using the information on the first layer according to a determined result. | 07-03-2014 |
20140185672 | IMAGE ENCODING METHOD, IMAGE DECODING METHOD, IMAGE ENCODING APPARATUS, IMAGE DECODING APPARATUS, AND IMAGE CODING APPARATUS - An image encoding method includes: generating a first bitstream by encoding an input image, and a first decoded image by encoding and decoding the input image; and generating a second bitstream by encoding the input image using the first decoded image, and a second decoded image by encoding and decoding the input image; wherein the second decoded image has resolution or image quality higher than resolution or image quality of the first decoded image, the generating of a second bitstream and a second decoded image includes generating a prediction block for a current block by intra prediction, and in the generating of a prediction block, the prediction block is generated using (i) pixels included in the second decoded image as top and left reference pixels for the current block, and (ii) pixels included in the first decoded image as right and bottom reference pixels for the current block. | 07-03-2014 |
20140185673 | METHOD AND APPARATUS FOR IMAGE ENCODING/DECODING - This document discloses a method and apparatus for image encoding/decoding which support multiple layers. The method for image decoding comprises analyzing a video parameter set (VPS) extension for layer dependency on a current layer, analyzing slices for layer dependency on a current slice by determining whether not to apply layer dependency to the current slice or to apply new layer dependency to the current slice, the new layer dependency determining within a range of layer dependency analyzed from the VPS extension, and constructing a reference picture list about the current layer based on at least one of layer dependency analyzed from the VPS extension and layer dependency analyzed from the slice. | 07-03-2014 |
20140185674 | Methods and Systems for Inter-Layer Image Prediction Signaling - Embodiments of the present invention comprise systems and methods for predicting high dynamic range (HDR) image blocks with block-specific prediction data, where the systems and methods may comprise low dynamic range (LDR) image data and HDR image data for a target image block, where a scaled, offset LDR image block may be combined with HDR residual image block to form an HDR image block corresponding to the target image block. | 07-03-2014 |
20140185675 | APPARATUS AND METHOD FOR IMAGE ENCODING/DECODING USING PREDICTABILITY OF INTRA-PREDICTION MODE - An apparatus and a method for video encoding/decoding using predictability of an intra-prediction mode are disclosed. The apparatus for encoding a video of the present disclosure includes: an intra-prediction mode determiner for determining an encoder prediction mode which is an intra-prediction mode of a current block of the video; an encoder for encoding a residual block generated by subtracting, from the current block, a predicted block generated by predicting the current block according to the encoder prediction mode; a mode information generator for generating mode information according to whether or not a video decoding apparatus is able to predict the encoder prediction mode; and an encoded data generator for generating encoded data including the encoded residual block and the mode information. The present disclosure can enhance compression in video encoding/decoding by using intra-prediction to predict the video with a minimum necessary bit rate. | 07-03-2014 |
20140185676 | LINE-BASED COMPRESSION FOR DIGITAL IMAGE DATA - A method of compressing digital image data is provided that includes selecting an entropy code for encoding a line of pixels in the digital image data, wherein the entropy code is selected from a plurality of variable length entropy codes, using spatial prediction to compute a pixel predictor and a pixel residual for a pixel in the line of pixels, and selectively encoding the pixel residual using one of the entropy code or run mode encoding. | 07-03-2014 |
20140192865 | REFINING FILTER FOR INTER LAYER PREDICTION OF SCALABLE VIDEO CODING - Techniques involving inter layer prediction of scalable video coding are described. Such techniques may employ refining filters. | 07-10-2014 |
20140192866 | Data Remapping for Predictive Video Coding - Specifically, a method decodes a picture. The picture is encoded and represented by blocks in a bitstream. For each block, a remap flag is obtained from the bit-stream. The block is either a remapped reconstructed block or a non-remapped reconstructed block. Either the non-mapped reconstructed block or an inverse remapped reconstructed block is output according to the remap flag. The remapped reconstructed block maximizes a similarity with the neighboring blocks, as compared to the similarity of the non-mapped reconstructed block and the neighboring blocks, by applying point operations to the remapped reconstructed block. | 07-10-2014 |
20140192867 | CODING DEVICE, DECODING DEVICE, CODING/DECODING SYSTEM, CODING METHOD, AND DECODING METHOD - A coding device and method, which can suppress degradation of image data while guaranteeing a target compression ratio, a decoding device and method, which decode the data coded by the coding device and method, and a coding/decoding system including the coding device and the decoding device are provided. The coding device includes a predictive value data generator that sequentially generates predictive value data, a predictive error data generator that sequentially generates predictive error data, which is a difference between pixel data and the predictive value data, a coder that sequentially codes the predictive error data to sequentially generate variable-length coded data, and a coding controller that sequentially controls the coder. The coding controller sequentially calculates an accumulated value by accumulating a difference between a code length and a target code length of the variable-length coded data, and controls the coder such that the final accumulated value is 0 or lower. | 07-10-2014 |
20140192868 | INTER-LAYER REFERENCE PICTURE GENERATION FOR HLS-ONLY SCALABLE VIDEO CODING - An apparatus for coding video information may include a memory unit configured to store video information associated with a picture and a processor in communication with the memory unit configured to resample video information of a reference picture to obtain a resampled picture having a plurality of slices and a different picture size than a picture to be encoded. Further, the processor may determine slice definitions for slices in the resampled picture. The slices of the resampled picture may correspond to slices of the reference picture. The processor may determine, based on the slice definitions, whether a slice of the resampled picture satisfies one or more slice definition rules. In response to determining that the slice of the resampled picture does not satisfy at least one slice definition rule, the processor can modify the slice definition for the slice so as to satisfy the slice definition rule. | 07-10-2014 |
20140192869 | Method, device, computer program, and information storage means for encoding or decoding a video sequence - The invention relates to video coding. A method of encoding or decoding such a video sequence according to the invention comprises: obtaining a reconstructed frame area made of an array of sample values; applying a sample adaptive offset, SAO, filtering to the reconstructed frame area based on SAO parameters; wherein at least one of the SAO parameters is determined independently of the sample values of the reconstructed frame area. Preferably, the sample-independent SAO parameters define an Edge Offset filtering. | 07-10-2014 |
20140192870 | System And Method For Providing Error Resilience, Random Access And Rate Control In Scalable Video Communications - Systems and methods for error resilient transmission, rate control, and random access in video communication systems that use scalable video coding are provided. Error resilience is obtained by using information from low resolution layers to conceal or compensate loss of high resolution layer information. The same mechanism is used for rate control by selectively eliminating high resolution layer information from transmitted signals, which elimination can be compensated at the receiver using information from low resolution layers. Further, random access or switching between low and high resolutions is also achieved by using information from low resolution layers to compensate for high resolution spatial layer packets that may have not been received prior to the switching time. | 07-10-2014 |
20140192871 | APPARATUS FOR CODING OR DECODING INTRA IMAGE BASED ON LINE INFORMATION OF REFERENCE IMAGE BLOCK - An apparatus for coding an image is provided to effectively code the image. The apparatus for coding the image includes an input image segmentation unit to segment an input image into a plurality of image blocks including a first image block and a second image block. The apparatus also includes a waveform information generation unit to select a plurality of reference pixels from among pixels included in the first image block, generate first waveform information about the first image block based on a pixel value difference between the selected plurality of reference pixels, and generate second waveform information about the second image block based on a pixel value difference between the pixels included in the second image block. The apparatus also includes a coding unit to code an image included in the second image block based on the first waveform information and the second waveform information. | 07-10-2014 |
20140192872 | APPARATUS FOR CODING OR DECODING INTRA IMAGE BASED ON LINE INFORMATION OF REFERENCE IMAGE BLOCK - An apparatus for coding an image is provided to effectively code the image. The apparatus for coding the image includes an input image segmentation unit to segment an input image into a plurality of image blocks including a first image block and a second image block. The apparatus also includes a waveform information generation unit to select a plurality of reference pixels from among pixels included in the first image block, generate first waveform information about the first image block based on a pixel value difference between the selected plurality of reference pixels, and generate second waveform information about the second image block based on a pixel value difference between the pixels included in the second image block. The apparatus also includes a coding unit to code an image included in the second image block based on the first waveform information and the second waveform information. | 07-10-2014 |
20140192873 | IMAGE ENCODING/DECODING METHOD AND APPARATUS FOR SAME - According to the present invention, an image encoding/decoding method comprises the steps of: performing an intra prediction on a current block so as to generate a prediction block; performing filtering on a filtering target pixel in the prediction block on the basis of the intra prediction mode of the current block so as to generate a final prediction block; and generating a reconstructed block on the basis of a reconstructed differential block corresponding to the current block and on the final prediction block. According to the present invention, image encoding/decoding efficiency can be improved. | 07-10-2014 |
20140192874 | METHOD AND APPARATUS FOR ENCODING VIDEO BY MOTION PREDICTION USING ARBITRARY PARTITION, AND METHOD AND APPARATUS FOR DECODING VIDEO BY MOTION PREDICTION USING ARBITRARY PARTITION - An apparatus for decoding a video including a processor which determines coding units having a hierarchical structure being data units in which the encoded image is decoded, and sub-units for predicting the coding units, by using information that indicates division shapes of the coding units and information about prediction units of the coding units, parsed from a received bitstream of a encoded image, wherein the sub-units comprise partitions obtained by splitting at least one of a height and a width of the coding units according to at least one of a symmetric ratio and an asymmetric ratio, and a decoder which reconstructs the image by performing decoding including motion compensation using the partitions for the coding units, using the encoding information parsed from the received bitstream, wherein the coding units having the hierarchical structure comprise coding units of coded depths split hierarchically according to the coded depths and independently from neighboring coding units. | 07-10-2014 |
20140192875 | METHOD AND APPARATUS FOR ENCODING VIDEO BY MOTION PREDICTION USING ARBITRARY PARTITION, AND METHOD AND APPARATUS FOR DECODING VIDEO BY MOTION PREDICTION USING ARBITRARY PARTITION - An apparatus for decoding a video includes a receiver which receives and obtains a bitstream of an encoded image, a processor which determines coding units having a hierarchical structure being data units in which the encoded image is decoded, and sub-units for predicting the coding units, by using information that indicates division shapes of the coding units and information about prediction units of the coding units, obtained from the received bitstream, wherein the sub-units comprise partitions obtained by splitting at least one of a height and a width of the coding units according to at least one of a symmetric ratio and an asymmetric ratio, and a decoder which reconstructs the image by performing decoding including motion compensation using the partitions for the coding units, using the encoding information parsed from received bitstream, wherein the coding units having the hierarchical structure comprise coding units of coded depths split hierarchically according to the coded depths and independently from neighboring coding units. | 07-10-2014 |
20140192876 | IMAGE ENCODING/DECODING APPARATUS AND METHOD TO WHICH FILTER SELECTION BY PRECISE UNITS IS APPLIED - According to the present invention, an image encoding/decoding method involves selecting, for units which are more precise than picture units, interpolation filters to be used in a motion compensated inter prediction to calculate sub-pixel values, wherein said precise units include at least one of a slice unit and a partition unit. Thus, encoding precision may be improved in a high resolution image having high definition (HD) or greater resolution. | 07-10-2014 |
20140198846 | DEVICE AND METHOD FOR SCALABLE CODING OF VIDEO INFORMATION - An apparatus configured to code (e.g., encode or decode) video information includes a memory unit and a processor in communication with the memory unit. The memory unit is configured to store video information associated with a base layer and an enhancement layer, the enhancement layer comprising an enhancement layer (EL) block and the base layer comprising a base layer (BL) block that is co-located with the enhancement layer block. The processor is configured to determine predicted pixel information of the EL block by applying a prediction function to pixel information of the BL block, and to determine the EL block using the predicted pixel information. The processor may encode or decode the video information. | 07-17-2014 |
20140198847 | ENCODING DEVICE, ENCODING METHOD, DECODING DEVICE, AND DECODING METHOD - The present technique relates to an encoding device, an encoding method, a decoding device, and a decoding method capable of improving encoding efficiency of a parallax image using information about the parallax image. The correction unit corrects a prediction image of a parallax image of a reference viewpoint using information about the parallax image of the reference viewpoint. The arithmetic operation unit encodes the parallax image of the reference viewpoint using the corrected prediction image. The encoded parallax image of the reference viewpoint and the information about the parallax image of the reference viewpoint are transmitted. The present technique can be applied to, for example, an encoding device of the parallax image. | 07-17-2014 |
20140205008 | METHOD FOR ENCODING AND/OR DECODING IMAGES ON MACROBLOCK LEVEL USING INTRA-PREDICTION - Conventional intra-prediction uses pixels from left and upper neighbour blocks to predict a macroblock (MB). Thus, the MBs must be sequentially processed, since reconstructed left and upper MBs must be available for prediction. In an improved method for encoding Intra predicted MBs, a MB is encoded in two steps: first, a first portion of the MB is encoded independently, without references outside the MB. Pixels of the first portion can be Intra predicted using DC mode. Then, the first portion is reconstructed. The remaining pixels of the MB, being a second portion, are intra predicted from the reconstructed pixels of the first portion and then reconstructed. The first portion comprises at least one column or one row of pixels of the MB. The encoding is applied to at least two Intra predicted MBs per slice, or per picture if no slices are used. | 07-24-2014 |
20140205009 | METHOD AND APPARATUS FOR SPATIALLY SCALABLE VIDEO COMPRESSION AND TRANSMISSION - A method and apparatus provide the ability to resample video frame into various resolutions, and to predict, quantize, and entropy code the video signal for spatially scalable compression and networking applications. The solution involves a unified re-sampling and estimation-theoretic prediction, quantization, and entropy coding framework, which by design is tailored to allow base layer coding information to be fully accessible and usable by enhancement layers; and for the enhancement layer to account for all available information from both layers for superior compression performance. Specialization may include specific techniques for coding and networking scenarios, where the potential of the unified resampling and estimation-theoretic framework is realized to considerably improve the overall system performance over existing schemes. | 07-24-2014 |
20140205010 | ARITHMETIC DECODING DEVICE, IMAGE DECODING APPARATUS AND ARITHMETIC DECODING METHOD - An arithmetic decoding device includes a calculating unit that calculates candidates for split information using probability information, the split information indicating a boundary between a first value range and a second value range in range information, the probability information indicating whether a next item of binary data takes the first or second value, and the range information indicating a possible range of positional information obtained from a stream; a selecting unit that selects the split information corresponding to the range information from among the candidates; and a generating unit that generates the binary data according to which range of the range information divided at the split information includes the positional information and generates a next piece of the range information and a next piece of the positional information using the generated binary data. A process of the calculating unit and that of the generating unit are pipelined. | 07-24-2014 |
20140205011 | METHOD AND AN APPARATUS FOR ENCODING/DECODING AN IMAGE - The present invention relates to an intra prediction method for predicting pixel values within a prediction target block on the basis of a plurality of peripheral pixels adjacent to the prediction target block. The intra prediction method according to the present invention includes the steps of: receiving and decoding encoded image information; determining a target boundary by determining a plurality of boundary pixels representing the target boundary within the prediction target block on the basis of the decoded image information; determining a plurality of prediction target regions partitioned on the basis of the target boundary within the prediction target block; and performing a prediction for each of the plurality of prediction target regions on the basis of peripheral pixels differing from each other selected from among the plurality of the peripheral pixels. | 07-24-2014 |
20140211849 | REFERENCE PICTURE SET SIGNALING AND RESTRICTION ON AN ELECTRONIC DEVICE - A previously signaled reference picture set (RPS) corresponding to a current picture is indicated. A first flag for a picture in the previously signaled RPS is set if the picture is to be used as a reference picture for the current picture. A bitstream is sent. | 07-31-2014 |
20140211850 | METHOD AND APPARATUS FOR PREDICTION MODE AND PARTITION MODE SYNTAX CODIND FOR CODING UNITS IN HEVC - A method and apparatus for coding of syntax elements are disclosed to allow prediction units in P and B slices to share the same syntax coding table. In one embodiment according to the present invention, the method and apparatus coding of syntax elements selectively apply a syntax coding table to encode or decode the syntax element associated with the partition mode of a coding unit of a picture region according to the slice type of the picture region. A first syntax coding table is used to process the syntax element if the slice type is an I mode and a second syntax coding table is used to process the syntax element if the slice type is not an I mode. | 07-31-2014 |
20140219342 | MODE DECISION SIMPLIFICATION FOR INTRA PREDICTION - In general, techniques are described for reducing the complexity of mode selection when selecting from multiple, different prediction modes. A video coding device comprising a processor may perform the techniques. The processor may compute approximate costs for a pre-defined set of intra-prediction modes identified in a current set. The current set of intra-prediction modes may include fewer modes than a total number of intra-prediction modes. The processor may compare approximate costs computed for one or more most probable intra-prediction modes to a threshold and replace one or more of the intra-prediction modes of the current set with one or more most probable intra-prediction modes. The processor may perform rate distortion analysis with respect to each intra-prediction mode identified in the current set and perform intra-prediction coding with respect to the current block using a mode of the current set. | 08-07-2014 |
20140219343 | METHOD AND APPARATUS FOR GENERATING RECONSTRUCTED BLOCK - A reconstructed block creating method is provided which includes decoding an intra prediction mode using an intra prediction mode group indicator and a prediction mode index, constructing a prediction block, inversely quantizing a received residual signal using a quantization parameter and adaptively inversely transforming the residual signal using the intra prediction mode to create a residual block, and adding the prediction block and the residual block to create a reconstructed block. The quantization parameter is reconstructed using a minimum quantization CU size, and the minimum quantization CU size is determined by a parameter transmitted from a picture parameter set. Therefore, it is possible to improve image quality by adaptively adjusting a quantization parameter of a current block depending on the size of a coding unit and enhance compression efficiency of an image by effectively encoding/decoding the quantization parameter. | 08-07-2014 |
20140219344 | METHOD AND APPARATUS FOR ENCODING INTRA PREDICTION INFORMATION - A method for encoding an intra prediction mode according to the present invention selects an intra prediction mode for a current block, determines the number of valid MPM candidates by checking the validity of MPM candidates of the current block, and if the number of valid MPM candidates is less than a previously set number, adds additional intra prediction modes as MPM candidates. MPM candidates can be adaptively added on the basis of the directionality of valid MPM candidates. Additionally, during the encoding of residual intra prediction modes, residual intra prediction modes are realigned on the basis of the directionality of valid MPM candidates. Accordingly, the present invention minimizes the information for encoding the intra prediction mode of the current block by adding MPM candidates or realigning the residual intra prediction modes on the basis of the directionality of valid MPM candidates. | 08-07-2014 |
20140219345 | METHOD AND APPARATUS FOR IMAGE ENCODING WITH INTRA PREDICTION MODE - A method for encoding an intra prediction mode according to the present invention selects an intra prediction mode for a current block, determines the number of valid MPM candidates by checking the validity of MPM candidates of the current block, and if the number of valid MPM candidates is less than a previously set number, adds additional intra prediction modes as MPM candidates. MPM candidates can be adaptively added on the basis of the directionality of valid MPM candidates. Additionally, during the encoding of residual intra prediction modes, residual intra prediction modes are realigned on the basis of the directionality of valid MPM candidates. Accordingly, the present invention allows the information for encoding the intra prediction mode of the current block to be minimized by adding MPM candidates or realigning the residual intra prediction modes on the basis of the directionality of valid MPM candidates. | 08-07-2014 |
20140219346 | METHOD AND APPARATUS FOR VIDEO CODING AND DECODING - Various methods, apparatuses and computer program products for video encoding and decoding. In some embodiments a first picture having a first resolution on a first layer is encoded without inter-layer prediction; a second picture having a second resolution on a second layer is encoded without inter-layer prediction; a third picture having the second resolution on the second layer is encoded without inter-layer prediction and without temporally referencing to pictures prior to the second picture. Further, a corresponding indication is encoded. In some embodiments one or more indications are received to determine if a switching point, referring to a picture coded using inter-layer prediction, from the first layer to the second layer exists, and if so, pictures in the first layer prior to the switching point; pictures associated with the switching point; and pictures in the second layer after the switching point may be decoded. | 08-07-2014 |
20140219347 | CROSS-CHANNEL RESIDUAL PREDICTION - Systems, apparatus and methods are described including determining a prediction residual for a channel of video data; and determining, using the first channel's prediction residual, a prediction residual for a second channel of the video data. Further, a prediction residual for a third channel of the video data may be determined using the second channel's prediction residual. | 08-07-2014 |
20140219348 | MOVING IMAGE ENCODING APPARATUS, CONTROL METHOD THEREOF AND COMPUTER PROGRAM - A filter intensity calculated in accordance with the image quality deterioration degree between an original image and locally decoded image is corrected in accordance with pattern information of the locally decoded image, and deblocking filter processing is performed by using the corrected filter intensity. The deblocking filter processing is performed by using a filter intensity which is calculated in accordance with the image quality deterioration degree between the original image and locally decoded image and the flatness of the original image or locally decoded image, and which increases as the image quality deterioration degree and flatness of an image increase. | 08-07-2014 |
20140233640 | RANDOM ACCESS POINT (RAP) FORMATION USING INTRA REFRESHING TECHNIQUE IN VIDEO CODING - A random access point is generated in a stream of coded digital pictures containing a plurality of predictive coded frames that have two or more predictive coded frames in which one or more subsections of each of the two or more predictive coded frames are intra coded. Information is added to a stream of digital pictures that identifies for a decoder which of two or more predictive-coded frames in the stream have intra-coded subsections at different portions that can be combined to form a patch frame. | 08-21-2014 |
20140233641 | INTRA-FRAME DECODING METHOD AND APPARATUS FOR SIGNAL COMPONENT SAMPLING POINT OF IMAGE BLOCK - Embodiments of the present invention provide an intra-frame decoding method and apparatus for a signal component sampling point of an image block. The method includes: obtaining prediction mode information about a first signal component of a current block from a video code stream; determining a prediction mode for the first signal component of the current block, where the prediction mode for the first signal component of the current block is one of a DM mode and an LM mode; obtaining a prediction value of a first signal component sampling point of the current block according to the prediction mode for the first signal component of the current block; and obtaining a reconstruction value of the first signal component sampling point of the current block. The technical solutions provided by the embodiments of the present invention reduce complexity of implementing a decoding end. | 08-21-2014 |
20140233642 | Method and Apparatus for Intra-Prediction - An intra-prediction method is provided to predict a current block according to pixel values of an upper neighboring block and a left neighboring block. The method includes: acquiring, according to a prediction direction, mapped pixels in the left neighboring block for reference pixels in an upper neighboring block; calculating an average pixel value of pixel values of the reference pixels in the upper neighboring block and pixel values of their respective mapped pixels; and predicting, according to the prediction direction, a pixel value of a pixel in the current block by using the average pixel value. By using the method and apparatus for intra-prediction according to the present invention, a pixel value of a reference pixel used for prediction is acquired according to an average pixel value of reference pixels in an upper neighboring block and a left neighboring block of the current block. | 08-21-2014 |
20140233643 | TRANSFORMATION MODE ENCODING AND DECODING METHOD AND APPARATUS - Embodiments of the present invention disclose a transformation mode encoding and decoding method and apparatus. A correlation between the prediction mode and the transformation mode is used, and an optimal transformation mode candidate set is simplified, thereby saving resources when an index of an optimal transformation mode is encoded in encoding header information. In addition, encoding efficiency is higher when an encoding end elects a transformation mode. | 08-21-2014 |
20140233644 | METHOD FOR ENCODING/DECODING AN INTRA-PICTURE PREDICTION MODE USING TWO INTRA- PREDICTION MODE CANDIDATE, AND APPARATUS USING SUCH A METHOD - The method for decoding an intra-picture prediction mode includes the steps of: determining whether the intra-picture prediction mode of a current prediction unit is identical to a first intra-picture prediction mode candidate or a second intra-picture prediction mode candidate based on bit information; and when the intra-picture prediction mode of the current prediction unit is identical to the first intra-picture prediction mode candidate and/or to the second intra-picture prediction mode candidate, determining whether the first intra-picture prediction mode candidate or the second intra-picture prediction mode candidate is identical to the intra-picture prediction mode of the current prediction unit on the basis of additional bit information, and decoding the intra-picture prediction mode of the current prediction unit. | 08-21-2014 |
20140241426 | INTERLEAVED VIDEO STREAMS - A first predictive frame is exchanged between an encoder and a decoder. A second predictive frame is exchanged between the encoder and the decoder, where the first predictive frame is encoded using at least some portion of a first reference frame and the second predictive frame is encoded using at least some portion of a second reference frame different from the first reference frame. | 08-28-2014 |
20140241427 | METHOD AND APPARATUS FOR CODING MATRIX AND METHOD AND APPARATUS FOR DECODING MATRIX - The present disclosure provides a method and an apparatus for coding or decoding a matrix, includes: dividing a matrix into layers according to a preset quantity of divided layers, and grouping matrix elements into different layers; performing, according to a determined layer number of a highest layer to be coded and in an order of layers one by one, coding processing on matrix elements at each layer to be coded; for a layer having a layer number less than or equal to the layer number of the highest layer to be coded, writing residual data between an original matrix element value corresponding to the layer and a corresponding matrix element predicted value into a bit stream; for a layer having a layer number greater than the layer number of the highest layer to be coded, writing no coded data of the layer into the bit stream. | 08-28-2014 |
20140241428 | IMAGE PROCESSING DEVICE AND IMAGE PROCESSING METHOD - Provided is an image processing device including a decoding section that, from an encoded stream of a first picture among two or more pictures associated with a common scene, decodes MostProbableMode information for a first prediction unit within the first picture, a first prediction section that conducts intra prediction on the first prediction unit using the MostProbableMode information decoded by the decoding section, and a second prediction section that conducts intra prediction using the MostProbableMode information used by the first prediction section on a second prediction unit corresponding to the first prediction unit within a second picture among the two or more pictures. | 08-28-2014 |
20140247871 | ADAPTIVE PARTITION CODING - Although wedgelet-based partitioning seems to represent a better tradeoff between side information rate on the one hand and achievable variety in partitioning possibilities on the other hand, compared to contour partitioning, the ability to alleviate the constraints of the partitioning to the extent that the partitions have to be wedgelet partitions, enables applying relatively uncomplex statistical analysis onto overlaid spatially sampled texture information in order to derive a good predictor for the bi-segmentation in a depth/disparity map. Thus, in accordance with a first aspect it is exactly the increase of the freedom which alleviates the signaling overhead provided that co-located texture information in form of a picture is present. Another aspect pertains the possibility to save side information rate involved with signaling a respective coding mode supporting irregular partitioning. | 09-04-2014 |
20140247872 | EFFECTIVE WEDGELET PARTITION CODING - Wedgelet separation lines of neighboring blocks are predicted from each other by aligning the wedgelet separation lines of such neighboring blocks to each other, thereby reducing the side information coding rate that may be used. | 09-04-2014 |
20140247873 | MULTI-VIEW CODING WITH EXPLOITATION OF RENDERABLE PORTIONS - Actually rendered portions of a renderable portion of a first view of a multi-view signal are introduced into a prediction loop of a multi-view encoder to form a reference signal for the block-based prediction of the encoder's view predictor may improve the prediction and thereby increasing the coding efficiency. The introduction may be performed by completely inserting the renderable portion into the prediction loop to form new reference pictures with their own reference picture indices in addition to reference pictures obtained by the reconstructed version of the multi-view signal of the block-based prediction. Alternatively, the actually rendered portion may be introduced into the prediction loop completely, but with replacing the normal prediction reference signal, i.e. the normally reconstructed signal as obtained by block-based prediction. Alternatively, it may be signaled within the data stream which portions of the renderable portion are used to replace respective portions in the normally reconstructed signal. | 09-04-2014 |
20140247874 | IMAGE PROCESSING APPARATUS AND METHOD - The present disclosure relates to an image processing apparatus and method with which a decrease in a coding efficiency can be suppressed. | 09-04-2014 |
20140247875 | VIDEO DECODING DEVICE AND VIDEO DECODING METHOD - A parallel processing starting unit | 09-04-2014 |
20140247876 | VIDEO ENCODING DEVICE, VIDEO DECODING DEVICE, VIDEO ENCODING METHOD, AND VIDEO DECODING METHOD - A tile partitioning unit | 09-04-2014 |
20140254664 | METHODS TO PERFORM INTRA PREDICTION FOR COMPRESSION OF CFA DATA - Methods to perform intra prediction for compression of color filter array data utilize one or more prediction patterns and two lines of memory to support more than one color filter array and to improve performance. | 09-11-2014 |
20140254665 | METHOD FOR ENCODING AND DECODING IMAGES, ENCODING AND DECODING DEVICE, AND CORRESPONDING COMPUTER PROGRAMS - A method for coding includes; segmenting an image into blocks; grouping blocks into a number of subsets; coding, using an entropy coding module, each subset, by associating digital information with symbols of each block of a subset, including, for the first block of the image, initializing state variables of the coding module; and generating a data sub-stream representative of at least one of the coded subsets of blocks. Where a current block is the first block to be coded of a subset, symbol occurrence probabilities for the first current block are determined based on those for a coded and decoded predetermined block of at least one other subset. Where the current block is the last coded block of the subset: writing, in the sub-stream representative of the subset, the entire the digital information associated with the symbols during coding of the blocks of the subset, and implementing the initializing sub-step. | 09-11-2014 |
20140254666 | PARALLEL PROCESSING FOR VIDEO CODING - In one example, a device for coding video data includes a video coder configured to code data representative of whether a tile of an enhancement layer picture can be predicted using inter-layer prediction, and predict data of the tile using inter-layer prediction only when the data indicates that the tile can be predicted using inter-layer prediction. | 09-11-2014 |
20140254667 | PARALLEL PROCESSING FOR VIDEO CODING - In one example, a device for coding video data includes a video coder configured to code data indicating whether tile boundaries of different layers of video data are aligned and whether inter-layer prediction is allowed along or across tile boundaries of enhancement layer blocks, code an enhancement layer block in an enhancement layer tile of the video data without using inter-layer prediction from a collocated base layer block for which inter-layer filtering or reference layer filtering across tile boundaries in a reference layer picture in an access unit including both the enhancement layer tile and the base layer block is enabled, and code the collocated base layer block. | 09-11-2014 |
20140254668 | PARALLEL PROCESSING FOR VIDEO CODING - In one example, a device for coding video data includes a video coder configured to code a value for a syntax element representative of whether any two reference layer samples, collocated with two respective enhancement layer picture samples within a common enhancement layer tile, must be within a common reference layer tile, and code the enhancement layer picture samples based at least in part on the value of the syntax element. | 09-11-2014 |
20140254669 | PARALLEL PROCESSING FOR VIDEO CODING - In one example, a device for coding video data includes a video coder configured to code, for a tile of an enhancement layer picture, data indicating a number of tiles in a base layer picture that need to be coded before the tile of the enhancement layer picture can be coded, code tiles of the base layer picture corresponding to the number of tiles, and, after coding the tiles of the base layer picture, code the tile of the enhancement layer picture substantially in parallel with at least one other tile in the base layer picture. | 09-11-2014 |
20140254670 | METHOD AND APPARATUS FOR ROI CODING USING VARIABLE BLOCK SIZE CODING INFORMATION - A video/image compression method based on an region of interest (ROI) can be performed in a variable block video encoder such as a HEW. A ROI coding method using variable block size coding information partitions a maximum coding unit (LCU) block obtained from an image into coding unit (CU) blocks. To obtain a quantization parameter of each coding unit (CU) block, the value of its quantization parameter is assigned based on its first hierarchical depth information and its second hierarchical depth information by using the first hierarchical depth information related to the size of the coding unit (CU) block and using the second hierarchical depth information related to the size of a prediction unit (PU) block correspondingly represented in consequence of the partition of the coding unit (CU) block. The resulting values of a quantization parameter assigned to different coding unit (CU) blocks may be different. | 09-11-2014 |
20140254671 | VIDEO DECODER PARALLELIZATION FOR TILES - A method for decoding video includes receiving a frame of the video that includes at least one slice and at least one tile. Each of the at least one slice and the at least one tile are not all aligned with one another. Each of the at least one slice is characterized that it is decoded independently of the other the at least one slice. Each of the at least one tile is characterized that it is a rectangular region of the frame and having coding units for the decoding arranged in a raster scan order. The at least one tile of the frame are collectively arranged in a raster scan order of the frame. | 09-11-2014 |
20140254672 | TRACKING A REFERENCE PICTURE ON AN ELECTRONIC DEVICE - A method for tracking a reference picture on an electronic device is described. The method includes receiving a bitstream. The method also includes decoding a portion of the bitstream to produce a decoded reference picture. The method further includes tracking the decoded reference picture in a decoded picture buffer (DPB) with reduced overhead referencing. The method additionally includes decoding a picture based on the decoded reference picture. | 09-11-2014 |
20140254673 | METHOD AND APPARATUS FOR ENCODING VIDEO, AND METHOD AND APPARATUS FOR DECODING VIDEO - An apparatus of decoding image includes an entropy decoder which extracts information that indicates an intra prediction mode applied to a current block to be decoded, from a bitstream, a reference pixel determining unit which determines one of neighboring pixels adjacent to the current block and filtered neighboring pixels filtered from the neighboring pixels as reference pixels, based on at least one of a size of the current block and an intra prediction mode of the current block, and an intra prediction performing unit which performs intra prediction on the current block using the extracted information and the determined reference pixels. | 09-11-2014 |
20140254674 | METHOD AND APPARATUS FOR ENCODING/DECODING IMAGE - A method for decoding an image, according to the present invention, comprises the steps of: deciding a prediction mode that corresponds to a chroma component block; deciding a transform skip mode of the chroma component block from a plurality of transform skip mode candidates, according to the prediction mode that corresponds to the chroma component block; and reverse-transforming the chroma component block on the basis of the transform skip mode that is decided. | 09-11-2014 |
20140254675 | ADAPTIVE TRANSFORM METHOD BASED ON IN-SCREEN PREDICTION AND APPARATUS USING THE METHOD - Disclosed is an adaptive transform method based on an in-screen prediction, and an apparatus using the method. A method for encoding an image can comprise a step of determining in-screen prediction mode groups, and a step of transforming by using a different transform method according to the in-screen prediction mode group. As a result, transforming can be performed by applying the different transform method according to the in-screen prediction mode group. | 09-11-2014 |
20140254676 | VIDEO ENCODING AND DECODING BASED ON IMAGE REFINEMENT - A particular implementation forms an initial reconstructed image block from inverse quantization and inverse transform, and further refines the reconstructed image block using pixels from neighboring reconstructed blocks. The image block may be refined using a bilateral filter, whose space parameter and range parameter are adaptive to the quantization parameter. The particular implementation can be used in both encoding and decoding when reconstructing an image block. When used in encoding, the particular implementation can be used jointly with coefficient truncation, where some non-zero transform coefficients are set to zero. The number of remaining non-zero transform coefficients after coefficient truncation may be adaptive to the quantization parameter, the variance of the image block, the number of non-zero transform coefficients of the image block, and the index of the last non-zero transform coefficient in a zigzag scanning order. | 09-11-2014 |
20140254677 | METHOD FOR DECODING CHROMA IMAGE - Provided is a method that derives a chroma intra prediction mode of a prediction unit, determines a size of a current chroma block using luma transform size information, generates a chroma prediction block of the current chroma block using the chroma intra prediction mode, generates a chroma residual block of the current chroma block using the chroma intra prediction mode and a chroma quantization parameter, generates a chroma reconstructed block adding the chroma prediction block and the chroma residual block, and the chroma quantization parameter is generated using a luma quantization parameter and information indicating the relationship between the luma quantization parameter and the chroma quantization parameter. Therefore, the coding efficiency is improved by adjusting the chroma quantization parameter per picture. Also, the amount of bits for transmitting the luma and chroma quantization parameters is reduced by encoding the luma quantization parameter using neighboring luma quantization parameters. | 09-11-2014 |
20140269911 | BATCH COMPRESSION OF PHOTOS - Embodiments are provided for batch compression of photos. In some embodiments, first and second images are selected, each image comprising a plurality of individual blocks and each individual block is defined by at least one matrix whose values are indicative of pixel data within the individual block. For each individual block of the second image, comparing a chosen individual block of the second image to each individual block within at least one region of the first image. The comparing including calculating a difference block between the chosen block of the second image and a chosen block within the at least one region of the first image, the difference block comprising a difference between corresponding matrix values of the two blocks being compared, and calculating a sum for the calculated difference block as a similarity metric for the two blocks being compared. A similar difference block is provided from the calculated difference blocks for inclusion in a difference representation based on the corresponding sum, the similar difference block operable with the chosen block within the at least one region of the first image to reconstruct the chosen individual block of the second image, and compressing the difference representation and the first image, where the difference representation is operable with the first image to reconstruct the second image, and transmitting the compressed information. | 09-18-2014 |
20140269912 | RESAMPLING AND PICTURE RESIZING OPERATIONS FOR MULTI-RESOLUTION VIDEO CODING AND DECODING - Techniques and tools for high accuracy position calculation for picture resizing in applications such as spatially-scalable video coding and decoding are described. In one aspect, resampling of a video picture is performed according to a resampling scale factor. The resampling comprises computation of a sample value at a position i,j in a resampled array. The computation includes computing a derived horizontal or vertical sub-sample position x or y in a manner that involves approximating a value in part by multiplying a 2 | 09-18-2014 |
20140269913 | METHOD AND APPARATUS FOR LOOP FILTERING - A method and apparatus for loop processing of reconstructed video in an encoder system are disclosed. The loop processing comprises an in-loop filter and one or more adaptive filters. The filter parameters for the adaptive filter are derived from the pre-in-loop video data so that the adaptive filter processing can be applied to the in-loop processed video data without the need of waiting for completion of the in-loop filter processing for a picture or an image unit. In another embodiment, two adaptive filters derive their respective adaptive filter parameters based on the same pre-in-loop video data. In yet another embodiment, a moving window is used for image-unit-based coding system incorporating in-loop filter and one or more adaptive filters. The in-loop filter and the adaptive filter are applied to a moving window of pre-in-loop video data comprising one or more sub-regions from corresponding one or more image units. | 09-18-2014 |
20140269914 | METHOD AND APPARATUS OF DERIVING INTRA PREDICION MODE - Provided is a method that constructs an MPM group including three intra prediction modes, determines the intra prediction mode of the MPM group specified by the prediction mode index as the intra prediction mode of the current prediction unit if the mode group indicator indicates the MPM group, and derives the intra prediction mode of the current prediction unit using the prediction mode index and the three prediction modes of the MPM group if the mode group indicator does not indicate the MPM group. Accordingly, additional bits resulted from increase of a number of intra prediction mode are effectively reduced. Also, an image compression ratio can be improved by generating a prediction block similar to an original block. | 09-18-2014 |
20140269915 | METHOD AND APPARATUS FOR ENCODING/DECODING IMAGE - A method for decoding an image, according to the present invention, comprises the steps of: receiving image information that corresponds to a block to be decoded; performing entropy-decoding with respect to the image information that is received; deciding a transform skip mode of the block to be decoded from a plurality of transform skip mode candidates, based on the image information that is entropy-decoded; and reverse-transforming the block to be decoded based on the transform skip mode that is decided. | 09-18-2014 |
20140286408 | INTER-LAYER PIXEL SAMPLE PREDICTION - Systems, devices and methods are described including performing scalable video coding using inter-layer pixel sample prediction. Inter-layer pixel sample prediction in an enhancement layer coding unit, prediction unit, or transform unit may use reconstructed pixel samples obtained from a base layer or from a lower enhancement layer. The pixel samples may be subjected to upsample filtering and/or refinement filtering. The upsample or refinement filter coefficients may be predetermined or may be adaptively determined. | 09-25-2014 |
20140286409 | ENHANCED REFERENCE REGION UTILIZATION FOR SCALABLE VIDEO CODING - Techniques to identify one or more candidate reference blocks used to generate a prediction block to encode a current coding block. The candidate reference blocks can be in the same layer as the current coding block or a different layer. In addition, the candidate reference blocks do not have to be co-located with the current coding block. Motion vectors and shift vectors can be used to identify the one or more candidate reference blocks. In addition, uniform and non-uniform weighting can be applied to the one or more candidate reference blocks to generate the prediction block. Accordingly, an encoder can determine and identify reference blocks to a decoder that can provide desirable rate-distortion cost. | 09-25-2014 |
20140286410 | SYSTEM AND METHOD FOR NON-UNIFORM VIDEO CODING - A method and system for video coding by integrating frame data and time data may be described. The method and system can include a video coding non-transitory storage media that integrates reference data and time data. More specifically, the video coding non-transitory storage media can produce one or more luma vectors and one or more chroma vectors within a video plane, the one or more luma vectors and one or more chroma vectors may be extended into time vectors that can be utilized for compression or reconstruction of the frame rate, define luma vector across time as a contiguous function and perform video compression across a time dimension. | 09-25-2014 |
20140286411 | METHOD AND APPARATUS FOR SCALABLE VIDEO ENCODING AND METHOD AND APPARATUS FOR SCALABLE VIDEO DECODING - Provided are scalable video encoding and decoding methods. The scalable video encoding method includes: obtaining a peripheral pixel of an enhancement block based on a peripheral pixel of a base layer block corresponding to the enhancement layer block to be prediction-encoded, and performing intra prediction on the enhancement layer block by using at least one of a peripheral pixel of the enhancement layer block that is encoded before the enhancement layer block and then restored and a peripheral pixel of the enhancement layer block that is obtained based on a peripheral pixel of the base layer block. | 09-25-2014 |
20140286412 | INTRA DC PREDICTION FOR LOSSLESS CODING IN VIDEO CODING - A video coder may generate a predictive block. As part of generating the predictive block, the video coder may use at least one of a losslessly reconstructed sample to left of a current sample in a current row of a predictive block and a losslessly reconstructed sample for a row of the predictive block above the current row for DC prediction of the current sample. | 09-25-2014 |
20140286413 | DISABLING SIGN DATA HIDING IN VIDEO CODING - A video coder may determine that sign data hiding is disabled for a current block if the current block is generated using lossy coding without application of a transform to residual data and the current block is intra predicted using an intra prediction mode in which a residual differential pulse code modulation (DPCM) technique is used. | 09-25-2014 |
20140286414 | MOVING PICTURE ENCODING DEVICE, MOVING PICTURE ENCODING METHOD AND MOVING PICTURE ENCODING PROGRAM, AND MOVING PICTURE DECODING DEVICE, MOVING PICTURE DECODING METHOD AND MOVING PICTURE DECODING PROGRAM - In inter prediction that is performed by partitioning a first block, which is obtained by partitioning each picture, into one or more second blocks, a spatial merge candidate generating unit derives a spatial merge candidate without referring to a block included in a first block that includes a second block. In case of a mode where a coding block is divided by a horizontal border into prediction blocks arranged vertically, the reference index derivation unit of a time merge candidate sets reference index information of a time merge candidate to a value of reference index information of an encoded prediction block adjacent to a left edge of a prediction block subject to encoding. | 09-25-2014 |
20140286415 | VIDEO ENCODING/DECODING METHOD AND APPARATUS FOR SAME - According to the present invention, a video decoding method comprises: a step of decoding a first bitstream corresponding to a base layer image based on first decoding information corresponding to the image that belongs to the view which is different from the view to which the base layer image belongs; and a step of decoding a second bitstream corresponding to an enhancement layer image based on second decoding information corresponding to the base layer image and third decoding information corresponding to the image that belongs to the view which is different from the view to which the enhancement layer image belongs. | 09-25-2014 |
20140286416 | METHOD AND DEVICE FOR TRANSMITTING IMAGE INFORMATION, AND DECODING METHOD AND DEVICE USING SAME - An image decoding method according to the present invention comprises the steps of: acquiring information to form a reference picture set of a current picture by entropy decoding the received bitstream information; and performing prediction on a prediction block inside the current picture by using a reference picture list which is formed based on the reference picture set. | 09-25-2014 |
20140286417 | DATA ENCODING AND DECODING - A data coding apparatus in which a set of ordered data is encoded includes: an entropy encoder encoding the ordered data, wherein each data item is split into respective data subsets that are encoded by first and second encoding systems so that for a predetermined quantity of encoded data generated in respect of a group of data items by the first encoding system, a variable quantity of zero or more data is generated in respect of that group of data by the second encoding system; and an output data stream assembler generating an output data stream from the encoded data, the output data stream including successive packets of a predetermined quantity of data generated by the first encoding system followed, in a data stream order, by the zero or more data generated by the second encoding system in respect of same data items as encoded by the first encoding system. | 09-25-2014 |
20140294072 | APPARATUSES AND METHODS FOR STAGGERED-FIELD INTRA-REFRESH - Examples of apparatuses and methods for performing staggered-field intra-refresh process are described herein. An example apparatus may include an encoder configured to provide an encoded bitstream based on a video signal. The encoder is configured to perform a staggered-field intra-refresh process over a series of frames of the video signal, where a frame of the series of frames is divided into a plurality of regions. The encoder includes an intra-refresh block configured to refresh a region of frame for a first field of the frame that is spatially offset from a region of the frame refreshed for a second field. | 10-02-2014 |
20140294073 | APPARATUS AND METHOD OF PROVIDING RECOMPRESSION OF VIDEO - Disclosed herein are an apparatus and a method of providing recompression of a video capable of recompressing and transmitting flags of data having an association with neighboring data in a video block and an original video by a simple logic. To this end, the apparatus of providing recompression of a video includes: a recompressing unit recompressing a compressed video frame based on information obtained by comparing a selected block selected from the compressed video frame and an adjacent block adjacent to the selected block with each other; and a frame memory controlling unit storing the recompressed video frame in a frame memory. Therefore, a hardware volume may be decreased while original video data are maintained. | 10-02-2014 |
20140294074 | METHOD AND APPARATUS FOR ENCODING VIDEO, AND METHOD AND APPARATUS FOR DECODING VIDEO - Disclosed is a method of encoding a video, the method including: splitting a current picture into at least one maximum coding unit; determining a coded depth to output a final encoding result according to at least one split region obtained by splitting a region of the maximum coding unit according to depths, by encoding the at least one split region, based on a depth that deepens in proportion to the number of times the region of the maximum coding unit is split; and outputting image data constituting the final encoding result according to the at least one split region, and encoding information about the coded depth and a prediction mode, according to the at least one maximum coding unit. | 10-02-2014 |
20140294075 | IMAGE CODING METHOD, IMAGE DECODING METHOD, IMAGE CODING APPARATUS, AND IMAGE DECODING APPARATUS - An image coding method, comprising: subtracting a prediction signal from the input image signal for each coding unit, thereby generating respective prediction error signals; performing orthogonal transform and quantization on a corresponding one of the prediction error signals for each transform unit, eventually generating quantization coefficients; and coding pieces of management information indicating a structure of the transform units and the quantization coefficients into a tree structure. Each of the transform units corresponds to a corresponding one of leaf nodes in the tree structure. In the coding, for each leaf node, management information and a quantization coefficient are coded, eventually generating a coded signal in which the coded management information and the coded quantization coefficient are arranged in succession for each leaf node. | 10-02-2014 |
20140294076 | TRACKING A REFERENCE PICTURE ON AN ELECTRONIC DEVICE - A method for tracking a reference picture on an electronic device is described. The method includes receiving a bitstream. The method also includes decoding a portion of the bitstream to produce a decoded reference picture. The method further includes tracking the decoded reference picture in a decoded picture buffer (DPB) with reduced overhead referencing. The method additionally includes decoding a picture based on the decoded reference picture. | 10-02-2014 |
20140294077 | METHOD AND APPARATUS FOR ENCODING VIDEO BY USING DEBLOCKING FILTERING, AND METHOD AND APPARATUS FOR DECODING VIDEO BY USING DEBLOCKING FILTERING - A method and apparatus for encoding video by using deblocking filtering, and a method and apparatus for decoding video by using deblocking filtering are provided. The method of encoding video includes: splitting a picture into a maximum coding unit; determining coding units of coded depths and encoding modes for the coding units of the maximum coding unit by prediction encoding the coding units of the maximum coding unit based on at least one prediction unit and transforming the coding units based on at least one transformation unit, wherein the maximum coding unit is hierarchically split into the coding units as a depth deepens, and the coded depths are depths where the maximum coding unit is encoded in the coding units; and performing deblocking filtering on video data being inversely transformed into a spatial domain in the coding units, in consideration of the encoding modes. | 10-02-2014 |
20140301451 | NAL UNIT TYPE RESTRICTIONS - A system for encoding and/or decoding video that include NAL unit types. | 10-09-2014 |
20140301452 | MARKING PICTURES FOR INTER-LAYER PREDICTION - A method for video coding is described. Signaling of a maximum number of sub-layers for inter-layer prediction is obtained. A sub-layer non-reference picture is also obtained. It is determined whether a value of a temporal identifier of the sub-layer non-reference picture is greater than the maximum number of sub-layers for inter-layer prediction minus 1. The sub-layer non-reference picture is marked as “unused for reference” if the value of the temporal identifier of the sub-layer non-reference picture is greater than the maximum number of sub-layers for inter-layer prediction minus 1. In some cases a sub-layer non-reference picture is also obtained. It is determined whether a value of a temporal identifier of the sub-layer non-reference picture is greater than the maximum number of sub-layers for inter-layer prediction. The sub-layer non-reference picture is marked as “unused for reference” if the value of the temporal identifier of the sub-layer non-reference picture is greater than the maximum number of sub-layers for inter-layer prediction. | 10-09-2014 |
20140301453 | DECODING OF INTER-LAYER REFERENCE PICTURE SET AND REFERENCE PICTURE LIST CONSTRUCTION - A method for video coding is described. Signaling of a maximum number of sub-layers for inter-layer prediction is obtained. A sub-layer non-reference picture is also obtained. It is determined whether a value of a temporal identifier of the sub-layer non-reference picture is greater than the maximum number of sub-layers for inter-layer prediction minus 1. The sub-layer non-reference picture is marked as “unused for reference” if the value of the temporal identifier of the sub-layer non-reference picture is greater than the maximum number of sub-layers for inter-layer prediction minus 1. In some cases a sub-layer non-reference picture is also obtained. It is determined whether a value of a temporal identifier of the sub-layer non-reference picture is greater than the maximum number of sub-layers for inter-layer prediction. The sub-layer non-reference picture is marked as “unused for reference” if the value of the temporal identifier of the sub-layer non-reference picture is greater than the maximum number of sub-layers for inter-layer prediction. | 10-09-2014 |
20140301454 | DEPTH CODING MODES SIGNALING OF DEPTH DATA FOR 3D-HEVC - Techniques are described for encoding and decoding depth data for three-dimensional (3D) video data represented in a multiview plus depth format using depth coding modes that are different than high-efficiency video coding (HEVC) coding modes. Examples of additional depth intra coding modes available in a 3D-HEVC process include at least two of a Depth Modeling Mode (DMM), a Simplified Depth Coding (SDC) mode, and a Chain Coding Mode (CCM). In addition, an example of an additional depth inter coding mode includes an Inter SDC mode. In one example, the techniques include signaling depth intra coding modes used to code depth data for 3D video data in a depth modeling table that is separate from the HEVC syntax. In another example, the techniques of this disclosure include unifying signaling of residual information of depth data for 3D video data across two or more of the depth coding modes. | 10-09-2014 |
20140301455 | ENCODING/DECODING DEVICE AND METHOD USING VIRTUAL VIEW SYNTHESIS AND PREDICTION - The present invention relates to an encoding/decoding device and method using view synthesis and prediction. The encoding device may synthesize images corresponding to the surrounding views of a current view, encode current blocks that are included in the images of the current view, and apply a skip mode and a residual signal encoding technique. | 10-09-2014 |
20140301456 | INTER-LAYER PICTURE SIGNALING AND RELATED PROCESSES - In one implementation, an apparatus is provided for encoding or decoding video information. The apparatus comprises a memory configured to store inter-layer reference pictures associated with a current picture that is being coded. The apparatus further comprises a processor operationally coupled to the memory. In one embodiment, the processor is configured to indicate a number of inter-layer reference pictures to use to predict the current picture using inter-layer prediction. The processor is also configured to indicate which of the inter-layer reference pictures to use to predict the current picture using inter-layer prediction. The processor is also configured to determine an inter-layer reference picture set associated with the current picture using the indication of the number of inter-layer reference pictures and the indication of which of the inter-layer reference pictures to use to predict the current picture using inter-layer prediction. | 10-09-2014 |
20140301457 | MULTIPLE BASE LAYER REFERENCE PICTURES FOR SHVC - A method of coding video data can include receiving video information associated with a reference layer, an enhancement layer, or both, and generating a plurality of inter-layer reference pictures using a plurality of inter-layer filters and one or more reference layer pictures. The generated plurality of inter-layer reference pictures may be inserted into a reference picture list. A current picture in the enhancement layer may be coded using the reference picture list. The inter-layer filters may comprise default inter-layer filters or alternative inter-layer filters signaled in a sequence parameter set, video parameter set, or slice header. | 10-09-2014 |
20140301458 | DEVICE AND METHOD FOR SCALABLE CODING OF VIDEO INFORMATION - An apparatus configured to code (e.g., encode or decode) video information includes a memory unit and a processor in communication with the memory unit. The memory unit is configured to store video information associated with a video layer comprising one or more temporal sub-layers. The processor is configured to determine presence information for a coded video sequence in a bitstream, the presence information indicating whether said one or more temporal sub-layers of the video layer are present in the bitstream. The processor may encode or decode the video information. | 10-09-2014 |
20140301459 | MULTIPLE REFERENCE LAYER PREDICTION SIGNALING TECHNIQUES - The disclosed subject matter, in one embodiment, provides techniques to signal inter-layer texture and motion prediction from different direct dependent reference layers. In certain exemplary arrangements, techniques are provided which include one or more syntax elements in a high level syntax structure, e.g., the slice segment header, indicating such different direct dependent reference layer(s). | 10-09-2014 |
20140301460 | INTRA RATE CONTROL FOR VIDEO ENCODING BASED ON SUM OF ABSOLUTE TRANSFORMED DIFFERENCE - This disclosure describes techniques for rate control for intra coded frames. In one example of the disclosure, a rate control parameter may be calculated using a target bit rate and a complexity measure. In one example, the complexity measure is calculated with a sum of absolute transformed differences (SATD) calculation of an intra-coded frame. | 10-09-2014 |
20140301461 | INTER PREDICTION METHOD AND APPARATUS THEREFOR - According to the present invention, an inter prediction method comprises the steps of: generating a merge candidate list for a block to be predicted, wherein the block is to correspond to a current prediction unit; deriving, on the basis of one of a plurality of merge candidates constituting the merge candidate list, motion information on the block to be predicted; and performing, on the basis of the derived motion information, a prediction on the block to be predicted so as to generate a prediction block corresponding to the current prediction unit. | 10-09-2014 |
20140301462 | LOSSLESS IMAGE AND VIDEO COMPRESSION - A method is provided for encoding an intra predicted residual block of an image for use in image or video compression. The intra predicted residual block is associated with an intra prediction coding mode. The method includes generating a set of residual error blocks including residual data with different statistical characteristics from the residual data in the intra predicted residual block. Each of the residual error blocks is scanned and entropy coded to produce a first set of bit streams. The lengths of each of the first set of bit streams are recorded. The intra predicted residual block is also scanned and entropy coded to produce a second bit stream. The length of the second bit stream is recorded. Selecting the minimum length bit stream from the first set of bit streams and the second bit stream as the output coded bit stream of the intra predicted residual block. | 10-09-2014 |
20140307786 | SIMPLIFIED DEPTH CODING WITH MODIFIED INTRA-CODING FOR 3D VIDEO CODING - Systems, mediums, and methods for simplified depth coding with modified intra-coding for 3D video coding. | 10-16-2014 |
20140307787 | METHOD AND APPARATUS OF DEPTH PREDICTION MODE SELECTION - There is disclosed a method, apparatus and computer program product for prediction mode selection for coding a block of a depth map. An ordered list of coding modes is obtained, wherein the ordered list of coding modes comprises a plurality of coding modes. And whether a depth modeling mode and/or a region boundary chain mode is to be added into the ordered list of coding modes in accordance with a decision condition is determined. | 10-16-2014 |
20140307788 | METHOD AND APPARATUS FOR ENCODING AND DECODING VIDEO USING SKIP MODE - A video encoding apparatus includes: an inter prediction unit to determine a motion parameter of a current block and generate a predicted block of the current block, by performing a motion estimation on the current block; and an optimal mode determining unit to set a prediction mode of the current block as a SKIP mode when (i) the motion parameter of the current block is identical to a motion parameter of a candidate block among a plurality of candidate blocks and (ii) all-zero coefficients result from a transform and a quantization performed on a residual data block representing the difference between the current block and the predicted block. | 10-16-2014 |
20140307789 | METHOD AND APPARATUS FOR SETTING REFERENCE PICTURE INDEX OF TEMPORAL MERGING CANDIDATE - The present invention relates to a method and apparatus for setting a reference picture index of a temporal merging candidate. An inter-picture prediction method using a temporal merging candidate can include the steps of: determining a reference picture index for a current block; and inducing a temporal merging candidate block of the current block and calculating a temporal merging candidate from the temporal merging candidate block, wherein the reference picture index of the temporal merging candidate can be calculated regardless of whether a block other than the current block is decoded. Accordingly, a video processing speed can be increased and video processing complexity can be reduced. | 10-16-2014 |
20140307790 | VIDEO ENCODING DEVICE, VIDEO DECODING DEVICE, VIDEO ENCODING METHOD, VIDEO DECODING METHOD, AND PROGRAM - A video encoding device includes a down-sampler with sampling position shifter | 10-16-2014 |
20140314147 | HARMONIZED INTER-VIEW AND VIEW SYNTHESIS PREDICTION FOR 3D VIDEO CODING - There are disclosed various methods, apparatuses and computer program products for video encoding. The type of prediction used for a reference picture index may be signaled in the video bit-stream. The omission of motion vectors from the video bit-stream for a certain image element may also be signaled; signaling may indicate to the decoder that motion vectors used in prediction are to be construed at the decoder. The construction of motion vectors may take place by using disparity information that has been obtained from depth information of the picture being used as a reference. | 10-23-2014 |
20140314148 | APPARATUS, A METHOD AND A COMPUTER PROGRAM FOR VIDEO CODING AND DECODING - A method and related apparatus for decoding an image sequence from a bitstream, wherein an identifier indicating if all output pictures are decodable with a predefined set of reference pictures is decoded; an indication of required reference pictures for a given output picture is decoded; the indicated at least one reference picture for the given output picture is decoded; and the at least one output picture is decoded. | 10-23-2014 |
20140314149 | METHOD AND APPARATUS FOR ENCODING RESIDUAL BLOCK, AND METHOD AND APPARATUS FOR DECODING RESIDUAL BLOCK - A decoding apparatus includes a splitter which splits the image into a plurality of maximum coding units, hierarchically splits a maximum coding unit among the plurality of maximum coding units into a plurality of coding units, and determines one or more transformation residual blocks from a coding unit among the plurality of coding units, wherein the one or more transformation residual blocks include sub residual blocks, a parser which obtains an effective coefficient flag of a sub residual block among the sub residual blocks from a bitstream, the effective coefficient flag of the sub residual block indicating whether at least one non-zero effective transformation coefficient exists in the sub residual block, and when the effective coefficient flag indicates that at least one non-zero transformation coefficient exists in the sub residual block, obtains transformation coefficients of the sub residual block based on location information of the non-zero transformation coefficient and level information of the non-zero transformation coefficient obtained from the bitstream, and an inverse-transformer which performs inverse-transformation on a transformation residual block including the sub residual block based on the transformation coefficients of the sub residual block. | 10-23-2014 |
20140314150 | CODEWORD ASSIGNMENT FOR INTRA CHROMA MODE SIGNALING FOR HEVC - Intra prediction is used in state-of-the-art video coding standards such as AVC. The intra prediction modes are coded into the bitstream. Luma and chroma components could potentially have different prediction modes. For chroma components, there are 5 different modes defined in AVC: vertical, horizontal, DC, diagonal down right, and “same as luma”. Statistics show that the “same as luma” mode is frequent used, but in AVC, this mode is encoded using more bits than other modes during entropy coding, therefore the coding efficiency is decreased. Accordingly, a modified binarization/codeword assignment for chroma intra mode signaling is able to be utilized for high efficiency video coding (HEVC), the next generation video coding standard. | 10-23-2014 |
20140314151 | CODEWORD ASSIGNMENT FOR INTRA CHROMA MODE SIGNALING FOR HEVC - Intra prediction is used in state-of-the-art video coding standards such as AVC. The intra prediction modes are coded into the bitstream. Luma and chroma components could potentially have different prediction modes. For chroma components, there are 5 different modes defined in AVC: vertical, horizontal, DC, diagonal down right, and “same as luma”. Statistics show that the “same as luma” mode is frequent used, but in AVC, this mode is encoded using more bits than other modes during entropy coding, therefore the coding efficiency is decreased. Accordingly, a modified binarization/codeword assignment for chroma intra mode signaling is able to be utilized for high efficiency video coding (HEVC), the next generation video coding standard. | 10-23-2014 |
20140321542 | NEW PLANAR PREDICTION MODE - New intra planar modes are introduced for predicting digital video data. As part of the new intra planar modes, various methods are offered for predicting a first sample within a prediction unit, where the first sample is needed for referencing to when processing the new intra planar modes. And once the first sample is successfully predicted, the new intra planar modes are able to predict a sample of video data within the prediction unit by processing a bi-linear interpolation of four previously reconstructed reference samples. | 10-30-2014 |
20140321543 | METHOD AND APPARATUS FOR IMAGE ENCODING/DECODING - A method and an apparatus for image encoding/decoding are disclosed. The apparatus includes: a block decomposer for decomposing a current block into a plurality of sub-blocks; and an intra prediction encoder for performing an intra prediction encoding by referring to already encoded and decoded adjacent pixel information of each sub-block, based on an intra prediction mode equal to an intra prediction mode of the current block, thereby generating a bit stream for the current block. In image encoding and image decoding, when a current block to be encoded or decoded is predicted, the disclosed method and apparatus can improve the accuracy of the prediction, which can provide an image with a satisfactory reproduction quality by improved coding efficiency. | 10-30-2014 |
20140328397 | Intra-Prediction Method Using Filtering, And Apparatus Using The Method - Disclosed are an intra-prediction method using filtering and an apparatus using the method. An image-decoding method comprises: a step of filtering an n upper reference pixel of a block to be predicted and neighboring pixels of the n upper reference pixel so as to obtain the filtered n upper reference pixel; and a step of filtering an n left reference pixel of a block to be predicted and neighboring pixels of the n left reference pixel so as to obtain the filtered n left reference pixel. According to the present invention, intra-prediction may be efficiently performed to improve image-encoding/decoding efficiency. | 11-06-2014 |
20140328398 | CONDITIONALLY INVOKING A RESAMPLING PROCESS IN SHVC - An apparatus for coding video information according to certain aspects includes a memory and a processor. The memory unit is configured to store video information associated with an interlayer reference picture for a current picture to be coded. The processor is configured to: receive information relating to a plurality of interlayer reference offsets that are configured to define a region of a resampled version of the interlayer reference picture, wherein the region is used to generate a prediction of the current picture, and wherein the plurality of interlayer reference offsets include a left offset, a top offset, a right offset, and a bottom offset that are each specified relative to the current picture; determine based at least in part on the plurality of interlayer reference offsets whether to resample the interlayer reference picture; and in response to determining to resample the interlayer reference picture, resample the interlayer reference picture. | 11-06-2014 |
20140328399 | ENCODING OR DECODING METHOD AND APPARATUS - Embodiments of the present invention provide an encoding or decoding method and apparatus. The method includes: extracting first information in a bitstream; determining a chroma component intra prediction mode according to the first information; when the chroma component intra prediction mode cannot be determined according to the first information, extracting second information in the bitstream; and determining the chroma component intra prediction mode according to the second information, where the first information includes information for indicating whether the chroma component intra prediction mode is a DM mode or an LM mode, the second information is used to indicate a remaining mode as the chroma component intra prediction mode, and the remaining mode is one of available chroma component intra prediction modes other than a mode that may be determined according to the first information. | 11-06-2014 |
20140334541 | VIDEO COMPRESSION DEVICE - With a video compression device configured to compress one pixel per cycle, a predictive pixel generation unit generates predictive pixel values of a plurality of predictive modes defined assuming local decode pixels read from predetermined positions of a line memory as upper reference pixels and an input original image pixel positioned on the left side of a pixel to be compressed as a left reference pixel for the pixel to be compressed. A predictive mode determination unit calculates a predictive error in a unit based on differential values between the pixel value to be compressed and the predictive pixel value, and selects a minimum predictive mode. A DPCM unit generates a minimum differential value between the minimum predictive pixel value and the pixel to be compressed assuming local decode pixels as upper reference pixels and a local decode pixel value one cycle before as a left reference pixel. | 11-13-2014 |
20140334542 | METHOD AND DEVICE FOR INTRA PREDICTION VIDEO - A method and apparatus for intra predicting a video. The method includes: determining availability of a predetermined number of adjacent pixels used for intra prediction of a current block; if a first adjacent pixel is unavailable, searching for a second adjacent pixel that is available by searching the predetermined number of adjacent pixels in a predetermined direction based on the first adjacent pixel; and replacing a pixel value of the first adjacent pixel with a pixel value of a found second adjacent pixel. At least one third adjacent pixel in another location, which is not available and excludes the first adjacent pixel at a predetermined location, is sequentially replaced by using a directly adjacent pixel in a predetermined direction. | 11-13-2014 |
20140334543 | INTRA PREDICTION MODE ENCODING/DECODING METHOD AND APPARATUS - Disclosed are an intra prediction mode encoding and decoding method, an image decoding device, and an image encoding device. The intra prediction mode decoding method comprises the steps of: deriving most probable modes (MPMs) from surrounding prediction units adjacent to a current prediction unit; and deriving an intra prediction mode of the current prediction unit on the basis of an MPM flag indicating whether an MPM having the same prediction mode as the intra prediction mode of the current prediction unit exists among the derived MPMs. | 11-13-2014 |
20140334544 | SPATIAL PREDICTION METHOD, IMAGE DECODING METHOD, AND IMAGE CODING METHOD - A spatial prediction method capable of reducing the complexity of spatial prediction includes: detecting an edge (E) overlapping the current block by obtaining a horizontal gradient (Gy) and a vertical gradient (Gx) between pixels within a block adjacent to the current block; calculating an integer slope of the edge; determining, for each pixel position within the current block, a sub-pel position being an intersection between (i) a line that has the integer slope and passes through the pixel position and (ii) a boundary of the adjacent block; and predicting, for each pixel position, a pixel value at the pixel position based on a pixel value interpolated in the sub-pel position, wherein the boundary of the adjacent block is a row or a column that is the closest to the current block, among rows or columns of pixels included in the adjacent block. | 11-13-2014 |
20140341281 | Enhanced Intra-Prediction Coding Using Planar Representations - The present invention provides low complexity planar mode coding in which a first prediction value is calculated using linear interpolation between a value of respective horizontal boundary pixels and a value of one of vertical boundary pixels, and a second prediction value is calculated using linear interpolation between a value of respective vertical boundary pixels and a value of one of the horizontal boundary pixels. The first and second prediction values are then averaged to derive a respective prediction pixel value in a prediction block. A residual between the prediction block and a target block is signaled to a decoder. | 11-20-2014 |
20140341282 | ENCODING OR DECODING METHOD AND APPARATUS - Embodiments of the present invention provide an encoding or decoding method and apparatus. The method includes: extracting first information in a bitstream; determining a chroma component intra prediction mode according to the first information; when the chroma component intra prediction mode cannot be determined according to the first information, extracting second information in the bitstream; and determining the chroma component intra prediction mode according to the second information, where the first information includes information for indicating whether the chroma component intra prediction mode is a DM mode or an LM mode, the second information is used to indicate a remaining mode as the chroma component intra prediction mode, and the remaining mode is one of available chroma component intra prediction modes other than a mode that may be determined according to the first information. | 11-20-2014 |
20140341283 | METHOD AND APPARATUS FOR ENCODING VIDEO AND METHOD AND APPARATUS FOR DECODING VIDEO CHANGING SCANNING ORDER DEPENDING ON HIERARCHICAL CODING UNIT - A method and apparatus for encoding a video and a method and apparatus for decoding a video which change a scanning order according to hierarchical coding units. | 11-20-2014 |
20140341284 | METHOD AND DEVICE FOR SHARING A CANDIDATE LIST - The present invention relates to a method and device for sharing a candidate list. A method of generating a merging candidate list for a predictive block may include: producing, on the basis of a coding block including a predictive block on which a parallel merging process is performed, at least one of a spatial merging candidate and a temporal merging candidate of the predictive block; and generating a single merging candidate list for the coding block on the basis of the produced merging candidate. Thus, it is possible to increase processing speeds for coding and decoding by performing inter-picture prediction in parallel on a plurality of predictive blocks. | 11-20-2014 |
20140341285 | IMAGE PROCESSING DEVICE AND IMAGE PROCESSING METHOD - The present technology relates to an image processing device and an image processing method that are capable of improving the encoding efficiency of a parallax image by using information relating to the parallax image. A correction unit sets a calculation precision of a calculation that is used when performing a depth weighting prediction process that uses a depth weighting coefficient and a depth offset with the depth image as a target. A correction unit performs the depth weighting prediction process in relation to the depth image according to the calculation precision that is set, and generates a depth prediction image. A calculation unit generates a depth stream by encoding the depth image using the depth prediction image. The present technology can be applied to an encoding device of the parallax image, for example. | 11-20-2014 |
20140341286 | IMAGE CODING METHOD, IMAGE DECODING METHOD, IMAGE CODING APPARATUS, IMAGE DECODING APPARATUS, AND IMAGE CODING AND DECODING APPARATUS - An image decoding device includes a processor and storage configured to receive a bitstream from a server based on an instruction sent from an apparatus, decode an image on a block-by-block basis, from the bitstream and send the image to a display apparatus. The decoding includes obtaining first, second, third and fourth data, where context adaptive binary arithmetic decoding is performed on the first data, bypass decoding is performed on the second data, context adaptive binary arithmetic decoding is performed on the third data, and bypass decoding is separately performed on the fourth data. Four luma intra prediction modes are derived from a respective one of four luma context-dependent segments and a corresponding one of four luma context-independent segments for four subblocks in an image block, and one chroma intra prediction mode is derived from one chroma context-dependent segment and one chroma context-independent segment for the image block. | 11-20-2014 |
20140348232 | Multiview and Bitdepth Scalable Video Delivery - A video encoding and decoding system for use in a multiview and bitdepth coding system is described. Such system can comprise a plurality of layer groupings, where each group can be adapted to encode and/or decode based on predictions from previous layers and a plurality of data categories from the input video data. | 11-27-2014 |
20140348233 | IMAGE PROCESSING APPARATUS AND METHOD - The present technology relates to an image processing apparatus and method capable of preventing an increase in a cost of the apparatus. A setting unit sets identification information for identifying a correspondence relationship between a size of a block of an image and changing of a prediction method applied to the block, and an inter-prediction unit generates a prediction image according to the identification information. An encoder codes the block by using the prediction image so as to generate a coded stream. In addition, the encoder transmits the coded stream and the identification information. The present technology is applicable to, for example, a case of coding/decoding an image, and the like. | 11-27-2014 |
20140348234 | CODEWORD SPACE REDUCTION FOR INTRA CHROMA MODE SIGNALING FOR HEVC - Intra prediction is used in state-of-the-art video coding standards such as AVC. The intra prediction modes are coded into the bitstream. Luma and chroma components could potentially have different prediction modes. For chroma components, there are 7 different modes defined in AVC: vertical, horizontal, DC, diagonal directions, and “same as luma”. Statistics show that the “same as luma” mode is frequently used, but in AVC, this mode is encoded using more bits than other modes during entropy coding, therefore the coding efficiency is decreased. Accordingly, a modified binarization/codeword assignment for chroma intra mode signaling is able to be utilized for high efficiency video coding (HEVC), the next generation video coding standard. | 11-27-2014 |
20140348235 | VIDEO ENCODING APPARATUS AND VIDEO DECODING APPARATUS - While maintaining a high degree of freedom in choosing partition sizes and transformation sizes adapted for local characteristics of videos, the amount of metadata is decreased. A video encoding apparatus ( | 11-27-2014 |
20140348236 | IMAGE CODING METHOD AND APPARATUS USING SPATIAL PREDICTIVE CODING OF CHROMINANCE AND IMAGE DECODING METHOD AND APPARATUS - A coding method including dividing pixels of a chrominance component of an input image into blocks having a predetermined size; selecting one among a direct current prediction method, a vertical prediction method, a horizontal prediction method, and a hybrid prediction method according to a user's input; generating a prediction value of each pixel in a current block to be predictively coded, using at least one pixel value among pixel values in an upper reference block adjacent to the current block and in a side reference block adjacent to the current block, according to the selected prediction method; generating a differential value between the prediction value and a corresponding real pixel value in the current block; and coding the differential value and information on the selected prediction method using a predetermined coding method. | 11-27-2014 |
20140355675 | LOSSY DATA COMPRESSION WITH CONDITIONAL RECONSTRUCTION REFINEMENT - Methods of encoding and decoding media, for example video, using conditional reconstruction refinement are described. The encoding and decoding relies upon predictions that are based on previously encoded and decoded samples. Prediction information identifies the previously reconstructed samples upon which a prediction is to be based and is available to both the encoder and decoder. On the basis that a previously-reconstructed sample is going to be used as source data for a prediction, the encoder refines that reconstructed sample, uses the refined reconstructed sample for the prediction, and encodes refinement data to enable the decoder to also refine the previously-reconstructed sample during decoding. In some cases, a reconstructed sample may be refined more than once. Various flags or bits may be used to signal when refinement is enabled or disabled and may be signaled at various hierarchical points in the coding structure. | 12-04-2014 |
20140355676 | RESAMPLING USING SCALING FACTOR - An apparatus for coding video information according to certain aspects includes a memory and a processor. The memory unit is configured to store video information associated with a reference layer picture and an enhancement layer picture. The processor is configured to: store video information associated with a reference layer picture and an enhancement layer picture; receive a scale factor that indicates a proportion of scaling between the reference layer picture and the enhancement layer picture in a first direction; determine, without performing a division operation, a rounding offset value using the scale factor; and determine a coordinate in the first direction of a first sample located in the reference layer picture that corresponds to a second sample located in the enhancement layer picture using the scale factor and the rounding offset value. | 12-04-2014 |
20140355677 | IMAGE PROCESSING APPARATUS AND METHOD THEREOF - The present technology relates to an image processing apparatus and method capable of preventing an increase in a cost of the apparatus. | 12-04-2014 |
20140355678 | METHODS, APPARATUSES, AND PROGRAMS FOR ENCODING AND DECODING PICTURE - Compared to conventional intra divided-picture encoding, deterioration in the coding efficiency is suppressed and the encoding computational complexity and the decoding computational complexity are reduced. A divided picture generating unit divides an input encoding target picture into blocks of the same size and generates divided pictures having the same size by collecting pixels having the same relative position within each block. An intra divided-picture encoding processing unit performs intra divided-picture encoding on part of the divided pictures. An inter divided-picture encoding processing unit performs inter divided-picture encoding using another encoded divided picture as a reference picture. When there are a plurality of candidates for the reference picture, a correlation direction calculating unit obtains a combination in which a correlation of a pixel on an original picture is high among combinations of encoded divided pictures and their reference pictures. A reference picture selecting unit selects an encoded divided picture in a direction in which a correlation with an encoding target divided picture is high as the reference picture to be used in the inter divided-picture encoding processing unit. | 12-04-2014 |
20140355679 | METHOD, APPARATUS AND SYSTEM FOR ENCODING AND DECODING THE SIGNIFICANCE MAP FOR RESIDUAL COEFFICIENTS OF A TRANSFORM UNIT - Disclosed is a method of decoding a plurality of coding units from a bitstream of video data. The method determines a coding unit structure of the plurality of coding units from a first data block of the bitstream. The coding unit structure describes a division of a coding unit into the plurality of coding units. The method decodes, according to the determined coding unit structure, bypass encoded data for the plurality of coding units from a second data block of the bitstream. The method decodes, according to the determined coding unit structure, residual data for the plurality of coding units from a third data block of the bitstream. The method then forms the plurality of coding units from the bitstream using the residual data and the bypass encoded data. A method of encoding is also disclosed. | 12-04-2014 |
20140355680 | METHOD FOR IMAGE PREDICTION OF MULTI-VIEW VIDEO CODEC AND COMPUTER READABLE RECORDING MEDIUM THEREFOR - Provided are a method for image prediction of a multi-view video codec capable of improving coding efficiency, and a computer readable recording medium therefor. The method for image prediction of a multi-view video codec includes partitioning an image to a plurality of base blocks, acquiring information of reference images which are temporally different, acquiring information of reference images which have different views, and predicting a target block based on the acquired information. Accordingly, an image that is most similar to an image of a view to be currently compressed is generated using multiple images of different views, so that coding efficiency can be improved. | 12-04-2014 |
20140355681 | CONTEXT REDUCTION FOR CONTEXT ADAPTIVE BINARY ARITHMETIC CODING - A reduction in the number of binarizations and/or contexts used in context adaptive binary arithmetic coding (CABAC) for video coding is proposed. In particular, this disclosure proposes techniques that may lower the number contexts used in CABAC by up to 56. | 12-04-2014 |
20140362908 | METHOD FOR ENCODING DIGITAL VIDEO DATA - The present invention relates to a method for encoding digital video data corresponding to a sequence of digital source images using a cache memory, each of the digital source images having an equal source image width corresponding to a first number of blocks, the cache memory having a cache width corresponding to a second number of blocks, wherein the second number of blocks is smaller than the first number of blocks. | 12-11-2014 |
20140362909 | DYNAMIC RANGE CONTROL OF INTERMEDIATE DATA IN RESAMPLING PROCESS - An apparatus for coding video information according to certain aspects includes a memory and a processor. The memory unit is configured to store video information. The processor is configured to: obtain reference layer video information; upsample the reference layer video information in a first dimension to generate an intermediate output; constrain the intermediate output to a predetermined bit depth; and upsample the constrained intermediate output in a second dimension, wherein the second dimension is orthogonal to the first dimension. | 12-11-2014 |
20140362910 | PROCESSING BITSTREAM CONSTRAINTS RELATING TO INTER-LAYER PREDICTION TYPES IN MULTI-LAYER VIDEO CODING - An apparatus for coding video information may include computing hardware configured to: when a current picture is to be predicted using at least inter layer motion prediction (ILMP): process a collocated reference index value associated with the current picture, wherein the collocated reference index value indicates a first reference picture that is used in predicting the current picture using inter layer prediction (ILP); and determine whether the first reference picture indicated by the collocated reference index value is enabled for ILMP; when the current picture is to be predicted using at least inter layer sample prediction (ILSP): process a reference index value associated with a block in the current picture, wherein the reference index value indicates a second reference picture that is used in predicting the block in the current picture using ILP; and determine whether the second reference picture indicated by the reference index value is enabled for ILSP. | 12-11-2014 |
20140362911 | MATCHED FILTERING OF PREDICTION AND RECONSTRUCTION SIGNALS FOR NEXT GENERATION VIDEO - Techniques related to matched filtering of prediction and reconstruction signals for video coding are described. | 12-11-2014 |
20140362912 | PICTURE CODING AND DECODING - A picture with multiple slices is encoded by generating a coded slice representation for each of the slices. A slice flag is set to a first value for the first slice in the picture and corresponding slice flags of the remaining slices are set to a second defined value. A respective slice address is generated for each remaining slice to enable identification of the slice start position within the picture for the slice. A coded picture representation of the picture comprises the coded slice representations, the slice addresses and the slice flags. The slice flags enable differentiation between slices for which slice addresses are required and the slice per picture for which no slice address is needed to identify its slice start position. | 12-11-2014 |
20140362913 | IMAGE ENCODER AND DECODER USING UNDIRECTIONAL PREDICTION - The present invention relates to an image encoding and decoding technique, and more particularly, to an image encoder and decoder using unidirectional prediction. The image encoder includes a dividing unit to divide a macro block into a plurality of sub-blocks, a unidirectional application determining unit to determine whether an identical prediction mode is applied to each of the plurality of sub-blocks, and a prediction mode determining unit to determine a prediction mode with respect to each of the plurality of sub-blocks based on a determined result of the unidirectional application determining unit. | 12-11-2014 |
20140362914 | IMAGE ENCODER AND DECODER USING UNDIRECTIONAL PREDICTION - The present invention relates to an image encoding and decoding technique, and more particularly, to an image encoder and decoder using unidirectional prediction. The image encoder includes a dividing unit to divide a macro block into a plurality of sub-blocks, a unidirectional application determining unit to determine whether an identical prediction mode is applied to each of the plurality of sub-blocks, and a prediction mode determining unit to determine a prediction mode with respect to each of the plurality of sub-blocks based on a determined result of the unidirectional application determining unit. | 12-11-2014 |
20140362915 | IMAGE ENCODER AND DECODER USING UNDIRECTIONAL PREDICTION - The present invention relates to an image encoding and decoding technique, and more particularly, to an image encoder and decoder using unidirectional prediction. The image encoder includes a dividing unit to divide a macro block into a plurality of sub-blocks, a unidirectional application determining unit to determine whether an identical prediction mode is applied to each of the plurality of sub-blocks, and a prediction mode determining unit to determine a prediction mode with respect to each of the plurality of sub-blocks based on a determined result of the unidirectional application determining unit. | 12-11-2014 |
20140362916 | IMAGE ENCODER AND DECODER USING UNDIRECTIONAL PREDICTION - The present invention relates to an image encoding and decoding technique, and more particularly, to an image encoder and decoder using unidirectional prediction. The image encoder includes a dividing unit to divide a macro block into a plurality of sub-blocks, a unidirectional application determining unit to determine whether an identical prediction mode is applied to each of the plurality of sub-blocks, and a prediction mode determining unit to determine a prediction mode with respect to each of the plurality of sub-blocks based on a determined result of the unidirectional application determining unit. | 12-11-2014 |
20140369409 | Piecewise Cross Color Channel Predictor - A sequence of visual dynamic range (VDR) images may be encoded using a standard dynamic range (SDR) base layer and one or more enhancement layers. A prediction image is generated by using piecewise cross-color channel prediction (PCCC), wherein a color channel in the SDR input may be segmented into two or more color channel segments and each segment is assigned its own cross-color channel predictor to derive a predicted output VDR image. PCCC prediction models may include first order, second order, or higher order parameters. Using a minimum mean-square error criterion, a closed form solution is presented for the prediction parameters for a second-order PCCC model. Algorithms for segmenting the color channels into multiple color channel segments are also presented. | 12-18-2014 |
20140369410 | METHOD OF AND DEVICE FOR ENCODING AN HDR VIDEO TOGETHER WITH AN LDR VIDEO, METHOD OF AND DEVICE FOR RECONSTRUCTING ONE OF AN HDR VIDEO AND AN LDR VIDEO CODED TOGETHER AND PF STORAGE MEDIUM - The inventors realized that representing HDR content using LDR content and HDR residual is not unproblematic. The invention therefore proposes representing HDR content using LDR content, LDR residual and global illumination data, instead. That is, it is proposed a method of encoding an HDR video of high dynamic range together with an LDR video, the LDR video providing a lower dynamic range depiction of the HDR video content, the method comprising using processing means for encoding one video of the LDR video and a further LDR video extracted from the HDR video independent from the other video of the LDR video and the HDR video and predictive encoding the other video using the one video as reference, and lossless encoding global illumination data further extracted from the HDR video. This has the advantage that prediction is more stable and globally optimal predictors are more easily found. | 12-18-2014 |
20140369411 | IMAGE PROCESSING APPARATUS AND METHOD - The present disclosure relates to an image processing apparatus and a method therefor capable of reducing the amount of memory required for intra-frame prediction. | 12-18-2014 |
20140376624 | SCENE CHANGE DETECTION USING SUM OF VARIANCE AND ESTIMATED PICTURE ENCODING COST - A video processing device includes a complexity estimation module to determine a first sum of variances metric and a first estimated picture encoding cost metric for a first picture of a video stream. The video processing device further includes a scene analysis module to determine a first threshold based on a first statistical feature for sum of variance metrics of a set of one or more pictures preceding the first picture in the video stream and a second threshold based on a second statistical feature for estimated picture encoding cost metrics of the set of one or more pictures. The scene analysis module further is to identify a scene change as occurring at the first picture based on the first sum of variances metric, the first estimated picture encoding cost metric, the first threshold, and the second threshold. | 12-25-2014 |
20140376625 | INTRA PREDICTION METHOD AND ELECTRONIC DEVICE THEREFOR - An intra prediction method executed by a processor of an electronic device is disclosed. The method allows the electronic device to obtain a prediction unit of an image, and to set a search range for the prediction unit based on a reconstruction region of the image. The search range includes a plurality of predicted blocks. The electronic device further measures similarities between the prediction unit and each of the plurality of predicted blocks, determines a reference block based on the similarities, and predicts the prediction unit based on the reference block. | 12-25-2014 |
20140376626 | INTRA PREDICTION MODE MAPPING METHOD AND DEVICE USING THE METHOD - The present invention relates to an intra prediction mode mapping method and a device using the method. The intra prediction mode includes: decoding flag information providing information regarding whether an intra prediction mode of a plurality of candidate intra prediction modes for the current block is the same as the intra prediction mode for the current block, and decoding a syntax component including information regarding the intra prediction mode for the current block in order to induce the intra prediction mode for the current block if the intra prediction mode from among the plurality of candidate intra prediction modes for the current block is not the same as the intra prediction mode for the current block. Thus, it is possible to increase the efficiency with which are images are decoded. | 12-25-2014 |
20140376627 | PICTURE CODING DEVICE, PICTURE CODING METHOD, AND PICTURE CODING PROGRAM, AND PICTURE DECODING DEVICE, PICTURE DECODING METHOD, AND PICTURE DECODING PROGRAM - In a picture coding device, a significant coefficient information coding controller | 12-25-2014 |
20140376628 | MULTI-VIEW IMAGE ENCODING DEVICE AND METHOD, AND MULTI-VIEW IMAGE DECODING DEVICE AND METHOD - According to an embodiment, a multi-view image encoding device encodes a multi-view image including a plurality of viewpoint images. The device includes an assignor, a predictor, a subtractor, and an encoder. The assignor assigns reference image numbers to the reference images according to a number of reference images used in predicting already-encoded blocks obtained by dividing the viewpoint images. The predictor generates a prediction image with respect to an encoding target block obtained by dividing the viewpoint images by referring to the reference images. The subtractor calculates a residual error between an encoding target image and the prediction image. The encoder encodes: a coefficient of transformation which is obtained by performing orthogonal transformation and quantization with respect to the residual error; and the reference image numbers of the reference images used in generating the prediction image. | 12-25-2014 |
20140376629 | DECODING APPARATUS, DECODING METHOD, AND PROGRAM OF SAME - An encoding apparatus for encoding progressive image data and interlace image data corresponding to this progressive image data, having a first encoding unit configured to encode picture data composing the interlace image data to generate first encoded data and decoding and recomposing the first encoded data to generate recomposed image data, an up sample processing unit configured to up sample the generated recomposed image data to generate image data having the same resolution as that of the progressive image data, and a second encoding unit configured to encode the picture data composing the progressive image data to generate second encoded data using the generated image data as predictive image data. | 12-25-2014 |
20140376630 | IMAGE PROCESSING DEVICE AND METHOD - The present invention relates to an image processing device and method enabling noise removal to be performed according to images and bit rates. A low-pass filter setting unit | 12-25-2014 |
20140376631 | IMAGE PROCESSING DEVICE AND METHOD - The present invention relates to an image processing device and method enabling noise removal to be performed according to images and bit rates. A low-pass filter setting unit | 12-25-2014 |
20150010069 | Intra video coding in error prone environments - A method of processing data for video encoding, comprising the following steps:
| 01-08-2015 |
20150010070 | METHOD AND APPARATUS FOR DECIDING A VIDEO PREDICTION MODE - A method and an apparatus for deciding a video prediction mode are provided. The method includes providing n prediction modes, where n is a positive integer, selecting first prediction modes among the n prediction modes using a first cost function, and selecting a final prediction mode among the first prediction modes using a second cost function different from the first cost function. The first cost function includes a sum of absolute transformed difference (SATD) operation, and the second cost function includes a sum of squared difference (SSD) operation. | 01-08-2015 |
20150010071 | BASE COLOR MERGING FOR MULTI-STAGE BASE COLOR AND INDEX MAP (MBCIM) FOR REXT - An enhancement for removing signaling redundancy of base color within multi-stage base color and index map (MBCIM) processing of HEVC for computer generated screen content is presented. Redundancy is removed in response to determining and setting merge flags when neighboring pixels are coded and available. During coding of pixels in the current CU, then color are copied from the neighboring blocks when a merge flag is set, or the pixel is coded as it was previously. | 01-08-2015 |
20150010072 | METHOD AND APPARATUS FOR UNIFICATION OF COEFFICIENT SCAN OF 8X8 TRANSFORM UNITS IN HEVC - A method and apparatus for processing 2N×2N transform units (TUs) are disclosed. In one embodiment, the method comprises determining a first-layer scanning order among four N×N sub-blocks of the 2N×2N TU; determining a second-layer scanning pattern for said four N×N sub-blocks; and providing scanned 2N×2N transform coefficients of the intra-coded or the inter-coded 2N×2N TU using double scanning based on the first-layer scanning order and the second-layer scanning pattern. In another embodiment, said determining the first-layer scanning order is dependent on the second-layer scanning pattern. The second-layer scanning pattern can be diagonal, horizontal or vertical. In an embodiment, the first-layer scanning order can be from an upper-left sub-block, to an upper-right sub-block, to a lower-left sub-block and to a lower-right sub-block for the second-layer horizontal scanning pattern and from an upper-left sub-block, to a lower-left sub-block, to an upper-right sub-block and to a lower-right sub-block for other second-layer scanning patterns. | 01-08-2015 |
20150010073 | Dynamic quantization method for encoding data streams - The present invention relates to a method of dynamic quantization of a stream of images including blocks ( | 01-08-2015 |
20150010074 | METHOD AND APPARATUS FOR ENCODING MULTI-VIEW VIDEO PREDICTION CAPABLE OF VIEW SWITCHING, AND METHOD AND APPARATUS FOR DECODING MULTI-VIEW VIDEO PREDICTION CAPABLE OF VIEW SWITCHING - Video encoding and decoding accompanying inter prediction and motion compensation in a multi-view video prediction structure. A multi-view video prediction restoring method includes receiving a base view image stream and additional view image streams for two or more additional views; restoring base view images including base view anchor pictures that are I-picture type images by performing motion compensation referring to the base view images by using the base view image stream; and restoring images of a first additional view by performing at least one of disparity compensation referring to the restored base view images and motion compensation referring to images except for an anchor picture having a preceding reproduction order among the images of the first additional view by using an image stream of the first additional view among the additional view image streams. | 01-08-2015 |
20150010075 | IMAGE PROCESSING DEVICE AND METHOD - An image processing device and method that enable suppression of an increase in the amount of coding of a scaling list. The image processing device sets a coefficient located at the beginning of a quantization matrix by adding a replacement difference coefficient that is a difference between a replacement coefficient used to replace a coefficient located at the beginning of the quantization matrix and the coefficient located at the beginning of the quantization matrix to the coefficient located at the beginning of the quantization matrix; up-converts the set quantization matrix; and dequantizes quantized data using an up-converted quantization matrix in which a coefficient located at the beginning of the up-converted quantization matrix has been replaced with the replacement coefficient. The device and method can be applied to an image processing device. | 01-08-2015 |
20150010076 | Method of Coding and Decoding Images, Coding and Decoding Device and Computer Programs Corresponding Thereto - A method is provided for coding at least one image split up into partitions, a current partition to be coded containing data, at least one data item of which is allotted a sign. The coding method includes, for the current partition, the following steps: calculating the value of a function representative of the data of the current partition with the exclusion of the sign; comparing the calculated value with a predetermined value of the sign; as a function of the result of the comparison, modifying or not modifying at least one of the data items of the current partition, in the case of modification, coding the at least one modified data item. | 01-08-2015 |
20150010077 | PICTURE CODING DEVICE, PICTURE CODING METHOD, AND PICTURE CODING PROGRAM, AND PICTURE DECODING DEVICE, PICTURE DECODING METHOD, AND PICTURE DECODING PROGRAM - In a picture coding device that partitions differential information between a picture that is a coding target and a picture that is a prediction target into a plurality of sub blocks and codes the partitioned sub blocks in a predetermined sequence, a significant sub block information coding controller and a calculation encoder code significant sub block information that represents whether or not all the values of differential coefficients belonging to the sub block are zero. A significant coefficient information coding controller and the calculation encoder code significant differential coefficient information that represents whether or not the value of the differential coefficient is zero. A differential coefficient value coding controller and the calculation encoder code the value of the differential coefficient. | 01-08-2015 |
20150010078 | PICTURE CODING DEVICE, PICTURE CODING METHOD, AND PICTURE CODING PROGRAM, AND PICTURE DECODING DEVICE, PICTURE DECODING METHOD, AND PICTURE DECODING PROGRAM - A picture coding device partitions differential information between a coding target picture and a prediction target picture into sub blocks and codes the partitioned sub blocks. The device codes significant sub block information that represents whether or not all the values of differential coefficients belonging to the sub block are zero and codes significant differential coefficient information that represents whether or not the value of the differential coefficient is zero. A context index processing unit derives a context used for coding the significant sub block information and a context used for coding the significant differential coefficient information of the differential coefficient that is a coding target based on an addition equation using the significant sub block information of a coded sub block that is horizontally neighboring to the coding target sub block and the significant sub block information of a coded sub block that is vertically neighboring. | 01-08-2015 |
20150010079 | APPARATUS AND METHOD FOR ENCODING/DECODING IMAGES FOR INTRA-PREDICTION - A method of decoding an image includes the steps of restoring a residual value by performing inverse quantization and inverse transform on the residual value by entropy decoding a received bit stream, generating a prediction unit by performing intra prediction selectively using one of a plurality of prediction modes on a prediction unit split by conducting at least one of asymmetric partitioning and geometrical partitioning, and restoring an image by adding the residual value to the prediction unit. It may be possible to enhance encoding efficiency of high-resolution images having a resolution of HD or higher by performing intra prediction on the asymmetric partitioning and/or geometrical partitioning. | 01-08-2015 |
20150010080 | APPARATUS AND METHOD FOR ENCODING/DECODING IMAGES FOR INTRA-PREDICTION - A method of decoding an image includes the steps of restoring a residual value by performing inverse quantization and inverse transform on the residual value by entropy decoding a received bit stream, generating a prediction unit by performing intra prediction selectively using one of a plurality of prediction modes on a prediction unit split by conducting at least one of asymmetric partitioning and geometrical partitioning, and restoring an image by adding the residual value to the prediction unit. It may be possible to enhance encoding efficiency of high-resolution images having a resolution of HD or higher by performing intra prediction on the asymmetric partitioning and/or geometrical partitioning. | 01-08-2015 |
20150016515 | VIDEO ENCODING AND DECODING WITH PREDICTION AT HIGHER PRECISION - A video decoder has a transform mode and a transform skip mode and in the transform skip mode a residual prediction mode is selected. A compressed bit-stream is entropy-decoded to obtain a block of quantised values. An inverse quantiser operates in the transform mode to form transform coefficients and in the transform skip mode to form differential residual values. In the transform mode an inverse transform is performed to form residual values. In the transform skip mode residual prediction is used perform residual prediction using high accuracy locally decoded residual value. The residual value is then down-scaled to obtain the reconstructed residual. A block predictor is formed from decoded image values at the same precision at which video samples are stored in the frame memory. | 01-15-2015 |
20150016516 | METHOD FOR INTRA PREDICTION IMPROVEMENTS FOR OBLIQUE MODES IN VIDEO CODING - In various embodiments, a method and a decoder include identifying a directional intra prediction mode with an angle of prediction. The method also includes identifying a first and second reference neighboring samples in a block of the video along the angle of prediction; the angle of prediction intersects a pixel to be predicted. The method further includes determining which of the first and second reference samples is nearest the angle of prediction and applying a value of the nearest reference neighboring sample to the pixel as a predictor. Also, a method and a decoder include determining whether a block type of a block of the video is intra block copy. The method also includes responsive to the block type being the intra block copy, determining a transform block size of the block and, responsive to the transform block size being 4×4, applying a discrete sine transform to the block. | 01-15-2015 |
20150016517 | ENCODING DEVICE AND ENCODING METHOD, AND DECODING DEVICE AND DECODING METHOD - Provided is an encoding device including a non-occlusion region encoding unit configured to encode a difference between an image of a neighboring viewpoint, which is a viewpoint different from a criterion viewpoint, and a predicted image of the neighboring viewpoint of a non-occlusion region of the image of the neighboring viewpoint according to a first encoding scheme, and an occlusion region encoding unit configured to encode an occlusion region of the image of the neighboring viewpoint according to a second encoding scheme different from the first encoding scheme. | 01-15-2015 |
20150016518 | Video Decoding with Reduced Complexity Deblocking - A method and apparatus for decoding a video comprising a plurality of frames. Each frame was encoded in a plurality of blocks of pixels, using a predictive algorithm with deblocking inside the prediction loop. A first deblocking filter was applied by the encoder at boundaries between adjacent blocks, and the output of the deblocking filter was used to provide a reference frame for the predictive algorithm. The decoding comprises: reconstructing a frame of the video, to produce a reconstructed frame; applying a second deblocking filter at some block-boundaries in the reconstructed frame; and skipping deblocking-filtering at other block-boundaries in the reconstructed frame, even though deblocking was applied at those block-boundaries by the encoder. | 01-15-2015 |
20150016519 | HIGH LEVEL SYNTAX IMPROVEMENT ON INTER-LAYER PREDICTION FOR SHVC/MV-HEVC - Syntax changes for SHVC/MV-HEVC coding apparatus and methods are described which improve efficiency. In a first portion, syntax of header signaling position under P or B-slice conditions are described, and a new condition to signal inter-layer prediction layer. A second portion describes use of an inter-layer reference picture set as an alternative to the first portion, and provides an arranged syntax to more efficiently signal inter-layer reference information. In a third portion, an inter-layer sample only prediction and TMVP interaction is described which reduces signaling needs for collocated references syntax. | 01-15-2015 |
20150016520 | CROSS-LAYER PARALLEL PROCESSING AND OFFSET DELAY PARAMETERS FOR VIDEO CODING - In an example, a method of coding video data includes coding data of a video parameter set (VPS) of a multi-layer bitstream, including at least one of data that indicates whether any layers of the multi-layer bitstream have an inter-layer prediction restriction or data that indicates whether tile boundaries are aligned between at least two of the layers of the multi-layer bitstream, and coding the multi-layer bitstream in accordance with the data of the VPS. | 01-15-2015 |
20150016521 | VIDEO ENCODER FOR IMAGES - Some implementations can compress a digital image to create a compressed image corresponding to the digital image. The digital image can be divided into a plurality of coding units and a determination can be made whether to divide each coding unit of the plurality of coding units into smaller coding units/prediction units based on (i) a range of pixel values in each coding unit and/or (ii) a number of bits to encode the coding unit. Rate distortion optimization can be performed based on a size of each of the prediction units. A determination can be made whether to perform a transform for each of the transform units based on a size of each prediction unit and/or a spatial frequency measure associated with each transform unit. | 01-15-2015 |
20150016522 | IMAGE PROCESSING APPARATUS AND IMAGE PROCESSING METHOD - Provided is an image processing apparatus including a base layer prediction section that acquires prediction mode information for an intra prediction of a first prediction unit of a color difference component in a base layer of an image to be scalable-decoded, and an enhancement layer prediction section that, when the prediction mode information acquired by the base layer prediction section indicates a luminance based color difference prediction mode, generates a predicted image in the luminance based color difference prediction mode for a second prediction unit of the color difference component corresponding to the first prediction unit in an enhancement layer using coefficients calculated for the first prediction unit. | 01-15-2015 |
20150016523 | CONTENT ADAPTIVE PARTITIONING FOR PREDICTION AND CODING FOR NEXT GENERATION VIDEO - Techniques related to content adaptive partitioning for prediction and coding are described. | 01-15-2015 |
20150016524 | Method of Coding and Decoding Images, Coding and Decoding Device and Computer Programs Corresponding Thereto - A method for coding includes; segmenting an image into blocks; grouping blocks into a number of subsets; coding, using an entropy coding module, each subset, by associating digital information with symbols of each block of a subset, including, for the first block of the image, initializing state variables of the coding module; and generating a data sub-stream representative of at least one of the coded subsets of blocks. Where a current block is the first block to be coded of a subset, symbol occurrence probabilities for the first current block are determined based on those for a coded and decoded predetermined block of at least one other subset. Where the current block is the last coded block of the subset; writing, in the sub-stream representative of the subset, the entire the digital information associated with the symbols during coding of the blocks of the subset, and implementing the initializing sub-step. | 01-15-2015 |
20150016525 | IMAGE ENCODING METHOD AND DEVICE, AND DECODING METHOD AND DEVICE THEREFOR - A video encoding method and apparatus and a video decoding method and apparatus. In the video encoding method, a first predicted coding unit of a current coding unit that is to be encoded is produced, a second predicted coding unit is produced by changing a value of each pixel of the first predicted coding unit by using each pixel of the first predicted coding unit and at least one neighboring pixel of each pixel, and the difference between the current coding unit and the second predicted coding unit is encoded, thereby improving video prediction efficiency. | 01-15-2015 |
20150023417 | METHOD FOR SIMULTANEOUSLY ENCODING MACROBLOCK GROUPS OF FRAME - A first frame associated with a video stream is in a prior sequence than a second frame of the video stream. Each of the first frame and the second frame has a plurality of groups, and each of the groups contains a plurality of macroblocks. A plurality of encoding procedures of the groups of the second frame are simultaneously performed to encode the second frame into a plurality of strings of data, and encoded data of the second frame is outputted by the encoder according to the strings of data. Since a plurality of groups of the macroblocks in the second frame are simultaneously encoded, the encoder has a high efficiency of encoding the video stream. | 01-22-2015 |
20150023418 | IMAGE PROCESSING APPARATUS AND IMAGE PROCESSING METHOD - A moving image processing apparatus includes a storage unit to store encoding parameter information generated by encoding each of multiple blocks obtained by partitioning an image; a candidate list generation unit to generate a prediction vector candidate list including two prediction vector candidates for a motion vector of each of the blocks to be processed; a difference vector calculation unit to set one bit of predetermined information in selection information for the prediction vector candidates if inter-prediction is applied to the block to be processed, and to calculate a difference vector representing a difference between the motion vector of the block to be processed and one of the prediction vector candidates designated by the selection information; and a variable-length encoding unit to apply variable-length encoding to the encoding parameter information including the difference vector and the selection information. | 01-22-2015 |
20150023419 | DEVICE AND METHOD FOR SCALABLE CODING OF VIDEO INFORMATION - An apparatus configured to code video information includes a memory and a processor in communication with the memory. The memory is configured to store video information associated with a reference layer and an enhancement layer, the reference layer comprising a reference layer (RL) picture having a first slice and a second slice, and the enhancement layer comprising an enhancement layer (EL) picture corresponding to the RL picture. The processor is configured to generate an inter-layer reference picture (ILRP) by upsampling the RL picture, the ILRP having a single slice associated therewith, set slice information of the single slice of the ILRP equal to slice information of the first slice, and use the ILRP to code at least a portion of the EL picture. The processor may encode or decode the video information. | 01-22-2015 |
20150036743 | INTERLAYER PREDICTION METHOD AND DEVICE FOR IMAGE SIGNAL - The present invention relates to a multilayer structure-based image coding and decoding method. The present invention provides a method of using an intra prediction mode of a corresponding block of a lower layer in intra-frame predictive coding of a target block of an upper layer to increase coding efficiency and decrease complexity by removing redundancy from inter-layer intra prediction mode information. | 02-05-2015 |
20150036744 | IMAGE PROCESSING APPARATUS AND IMAGE PROCESSING METHOD - Provided is an image processing apparatus including an enhancement layer prediction section configured to generate a predicted image of a first prediction block of a color difference component in an enhancement layer of an image subjected to scalable video decoding using a prediction function of a luminance based color difference prediction mode having coefficients calculated from a luminance component and the color difference component in a position corresponding to the first prediction block in a base layer. | 02-05-2015 |
20150036745 | METHOD AND APPARATUS OF SIMPLIFIED LUMA-BASED CHROMA INTRA PREDICTION - A method and apparatus for chroma intra prediction based on reconstructed luma pixels and chroma pixels are disclosed. The chroma intra prediction is based on a linear model of derived co-located current luma pixels of the current luma block scaled by a scaling factor. The scaling factor comprises a product term of a division factor and a scaled covariance-like value associated with neighboring reconstructed luma and chroma pixels of a current block. The division factor is related to a first data range divided with rounding by a scaled variance-like value associated with the neighboring reconstructed luma pixels of the current block. The scaled covariance-like value, the first data range, or both of the scaled covariance-like value and the first data range are dependent on the internal bit depth, with which the chroma signal is processed during video coding process, according to an embodiment of the present invention. | 02-05-2015 |
20150036746 | MOVING PICTURE PREDICTION METHOD, MOVING PICTURE CODING METHOD AND APPARATUS, AND MOVING PICTURE DECODING METHOD AND APPARATUS - An image decoding method is provided which includes a time information determination step of determining time information of a current picture, a first reference picture referred to by the current picture and a second reference picture referred to by the current picture; a scaling parameter calculation step of calculating a scaling parameter based on a time distance between the first reference picture and a second reference picture; a weighting coefficient determination step of determining two weighting coefficients based on the scaling parameter; a predictive pixel value generation step of generating a predictive pixel value of the current picture by scaling a pixel value of the first reference picture and a pixel value of the second reference picture using the two weighting coefficients determined in the weighting coefficient determination step; and a decoding step of decoding the current picture using the predictive pixel value. | 02-05-2015 |
20150043634 | METHOD AND APPARATUS FOR PROCESSING INTRA PREDICTION MODE - Embodiments of the present invention provide a method and an apparatus for processing an intra prediction mode. The method includes: determining whether an intra prediction mode of each neighboring block in multiple neighboring blocks of a current block is applicable to the current block; and obtaining multiple mapped intra prediction modes of the current block according to a result of the determining, if it is determined that an intra prediction mode of a neighboring block is applicable to the current block, setting the intra prediction mode of the neighboring block as a mapped intra prediction mode of the current block, and if it is determined that the intra prediction mode of the neighboring block is not applicable to the current block, setting a specific intra prediction mode as the mapped intra prediction mode of the current block. | 02-12-2015 |
20150043635 | ENCODING AND DECODING BY SELECTIVE INHERITANCE - A method is provided for decoding at least one current encoded block of a first image relative to a reference block of a second image including at least one common element with the first image, wherein the reference block has been previously decoded. The method includes: filtering the decoded reference block; estimating, only on the basis of the filtered decoded reference block, at least one value of a local characteristic of the filtered decoded reference block; determining, on the basis of the estimated value of the local characteristic: a set of decoding information to be used for decoding the current block, a method for decoding the current block, on the basis of the estimated value of the local characteristic, decoding the current block on the basis of the set of determined decoding information and according to the determined decoding method. | 02-12-2015 |
20150043636 | METHOD AND DEVICE FOR PROCESSING VIDEO SIGNAL - The present invention encodes a warp map by using a video codec such as a multi-view texture image by a warp converter, and decodes a warp map by using a video codec such as a multi-view texture image by using a warp inverter. The present invention may incur less additional costs because it does not use a dedicated warp map coder. In addition, the present invention may convert a warp map by using a warp map converter and send the converted map to an encoder and invert decoded warp map information by using a warp map inverter so that the warp map is encoded and decoded by using a video codec such as a multi-view texture image. In addition, it is possible to increase compatibility by enabling various kinds of supplementary data to be used. In addition, it is possible to increase technique compatibility by simply applying a warp map scheme to a 3D video coding technique using a depth map. | 02-12-2015 |
20150043637 | IMAGE PROCESSING DEVICE AND METHOD - The present technology relates to an image processing device and method capable of improving the coding efficiency. | 02-12-2015 |
20150043638 | IMAGE PROCESSING APPARATUS AND IMAGE PROCESSING METHOD - Provided is an image processing apparatus including a first setting section configured to set a macroblock in a base layer decoded with a first coding scheme which is based on the macroblock with a fixed size, and a second setting section configured to set a coding unit in an enhancement layer decoded with a second coding scheme which is based on the coding unit subjected to recursive block division in accordance with a block size set by the first setting section. | 02-12-2015 |
20150043639 | METHOD AND DEVICE FOR CODING SCALABLE VIDEO ON BASIS OF CODING UNIT OF TREE STRUCTURE, AND METHOD AND DEVICE FOR DECODING SCALABLE VIDEO ON BASIS OF CODING UNIT OF TREE STRUCTURE - Provided are scalable video encoding and decoding methods and apparatuses. A scalable video encoding method includes: encoding a lower layer image according to coding units having a tree structure, the coding units hierarchically split from maximum coding units of an image; determining scalable coding modes for performing scalable encoding on a higher layer image based on the coding units having the tree structure by referring to the lower layer image; predicting and encoding the higher layer image by referring to encoding information of the lower layer image based on the determined scalable coding modes; and outputting coding modes, predicted values of the lower layer image, and the determined scalable coding modes of the higher layer image based on the determined scalable coding modes. | 02-12-2015 |
20150043640 | IMAGE ENCODING/DECODING METHOD FOR RATE-DISTORTION OPTIMIZATION AND DEVICE FOR PERFORMING SAME - Disclosed are an image encoding/decoding method for rate-distortion optimization and a device for performing the same. A macro-block to be encoded is provided, a prediction macro-block is generated by performing either inter prediction or intra prediction, a residual prediction block is generated on the basis of the generated prediction macro-block and the provided macro-block, and the residual prediction block is transformed by applying one of a plurality of predetermined transform matrices to the generated residual prediction block. Accordingly, rate-distortion can be optimized, and image quality can be enhanced. | 02-12-2015 |
20150043641 | DATA ENCODING AND DECODING - A video coding or decoding method using inter-image prediction to encode input video data in which each chrominance component has 1/Mth of the horizontal resolution of the luminance component and 1/Nth of the vertical resolution of the luminance component, where M and N are integers equal to 1 or more, comprises: storing one or more images preceding a current image; interpolating a higher resolution version of prediction units of the stored images so that the luminance component of an interpolated prediction unit has a horizontal resolution P times that of the corresponding portion of the stored image and a vertical resolution Q times that of the corresponding portion of the stored image, where P and Q are integers greater than 1; detecting inter-image motion between a current image and the one or more interpolated stored images so as to generate motion vectors between a prediction unit of the current image and areas of the one or more preceding images; and generating a motion compensated prediction of the prediction unit of the current image with respect to an area of an interpolated stored image pointed to by a respective motion vector; in which the interpolating step comprises: applying a ×R horizontal and ×S vertical interpolation filter to the chrominance components of a stored image to generate an interpolated chrominance prediction unit, where R is equal to (U×M×P) and S is equal to (V×N×Q), U and V being integers equal to 1 or more; and subsampling the interpolated chrominance prediction unit, such that its horizontal resolution is divided by a factor of U and its vertical resolution is divided by a factor of V, thereby resulting in a block of MP×NQ samples. | 02-12-2015 |
20150043642 | IMAGE CODING METHOD, IMAGE DECODING METHOD, IMAGE CODING APPARATUS, AND IMAGE DECODING APPARATUS - An image coding method for performing compression-coding on image data includes: binarizing a signal to be coded of the image data, to generate a binary signal; determining a low-order context which is a context associated with a type of the signal to be coded, and a high-order context that is common to the low-order context and a context associated with another type; calculating coding probability information to be used in arithmetic coding of the binary signal, using (i) high-order probability information corresponding to the determined high-order context and (ii) low-order probability information corresponding to the determined low-order context; performing the arithmetic coding on the binary signal using the coding probability information; and updating the high-order probability information and the low-order probability information based on the binary signal. | 02-12-2015 |
20150049806 | METHOD FOR MULTI-VIEW VIDEO ENCODING BASED ON TREE STRUCTURE ENCODING UNIT AND APPARATUS FOR SAME, AND METHOD FOR MULTI-VIEW VIDEO DECODING BASED ON TREE STRUCTURE ENCODING UNIT AND APPARATUS FOR SAME - Provided are multiview video inter-layer encoding and decoding based on coding units of a tree structure. A video encoding method includes operations of encoding a base layer image that is one of a base view texture image and a base view depth image of a base view image, based on coding units of a tree structure that are among coding units obtained by hierarchically splitting a maximum coding unit of an image, determining an inter-layer encoding mode for performing inter-layer encoding on an additional view image by referring to the base layer image based on the coding units of the tree structure, and referring to an additional layer image including the additional view image, based on the inter-layer encoding mode. | 02-19-2015 |
20150055702 | METHOD OF PROCESSING VIDEO SIGNALS - According to the present invention, a method of processing a video signal includes the steps of: receiving the depth data corresponding to a given block containing present pixels; determining a variation of the depth data; comparing the variation of the depth data with a predetermined value; if the variation is less than the predetermined value, coding the present pixels by using a first partial filter, and if the variation is greater than the predetermined value, coding the present pixels by using a second partial filter; wherein the second partial filter is applied to a wider range than the first partial filter. Accordingly the image quality of improved; the complexity according to the filter application is reduced; and at the same time variable filtering may improve the coding efficiency. | 02-26-2015 |
20150055703 | DETERMINING REGIONS WHEN PERFORMING INTRA BLOCK COPYING - In general, techniques are described for performing an intra block copying process to code video data. A video decoding device that includes a memory and one or more processors may perform the techniques. The memory may be configured to store a current block of a picture. The processors may be configured to perform an intra block copying process to decode the current block using a prediction block that is from a same slice or a same tile as that in which the coded current block resides, the prediction block restricted to be within a search region that only includes the same slice or the same tile as that in which the coded current block resides. | 02-26-2015 |
20150063452 | HIGH EFFICIENCY VIDEO CODING (HEVC) INTRA PREDICTION ENCODING APPARATUS AND METHOD - Disclosed is a residual signal inter-channel intra prediction encoding method between a residual signal of a luminance component of an image and a residual signal of a chrominance component thereof. It is possible to improve an intra prediction encoding performance when the inter-channel prediction is performed between residual signal of the luminance component and the chrominance component of HEVC, and derive a prediction coefficient for linear prediction at a high speed while the quadtree block structure of the HEVC is not changed. In addition, it is advantageous to avoid degradation in inter-channel prediction performance, which is caused when quadtree block structures of prediction units (PUs) of the luminance component and the chrominance component are different. | 03-05-2015 |
20150063453 | IMAGE INFORMATION DECODING METHOD, IMAGE DECODING METHOD, AND DEVICE USING SAME - The present invention relates to an image information decoding method. The decoding method includes receiving a bit stream including a Network Abstraction Layer (NAL) unit that includes information related to encoded image, and parsing a NAL unit header of the NAL unit. The NAL unit header may not include 1 bit flag information that represents whether a picture is a non-reference picture or a reference picture in the entire bit stream during encoding. | 03-05-2015 |
20150063454 | RESIDUAL PREDICTION FOR INTRA BLOCK COPYING - In an example, a method of decoding video data includes generating a residual block of a picture based on a predicted residual block including reconstructing one or more residual values of the residual block based on one or more predicted residual values of the residual block. The method also includes generating a current block of the picture based on a combination of the residual block and a prediction block of the picture. | 03-05-2015 |
20150063455 | METHODS AND APPARATUSES FOR PREDICTING DEPTH QUADTREE IN THREE-DIMENSIONAL VIDEO - A method of predicting and encoding depth information in a multi-view video includes encoding, by an encoding apparatus, depth information collocated with a texture of a current multi-view video picture in linkage with split information of a coding unit of the texture of the current multi-view video picture, the coding unit having a quadtree structure. The quantity of encoded data of depth information to be transmitted and complexity of encoding and decoding may be reduced by predicting and encoding depth information collocated with a texture of a current multi-view video picture in linkage with split information of a coding unit having a quadtree structure of the texture of the current multi-view video picture. | 03-05-2015 |
20150063456 | IMAGE ENCODING AND DECODING APPARATUS AND METHOD - An image encoding and decoding apparatus and method, the image encoding and decoding apparatus includes: an encoding unit adjusting at least one weight value adaptively to the number of bits expressing each pixel of a current image, predicting a pixel value of a block of interest by performing an operation on a pixel value of at least one block having a pixel value similar to the pixel value of the block of interest among blocks included in a previous image and the at least one adjusted weight value, and encoding the pixel value of the block of interest using the predicted pixel value of the block of interest; and a decoding unit adjusting the at least one weight value adaptively to the number of bits, restoring the predicted pixel value of the block of interest by performing an operation on the pixel value of the at least one block having the pixel value similar to the pixel value of the block of interest among blocks included in the restored previous image and the at least one adjusted weight value, and decoding the pixel value of the block of interest using the restored pixel value, wherein the previous image refers to an image displayed prior to a current image, and the block of interest is a target block of interest among blocks belonging to the current image. | 03-05-2015 |
20150071349 | LUMA AND CHROMA DECODING USING A COMMON PREDICTOR - There are provided video encoders, video decoders, and corresponding methods. A video encoder for encoding video signal data for an image block includes an encoder ( | 03-12-2015 |
20150071350 | IMAGE PROCESSING DEVICE AND IMAGE PROCESSING METHOD - The present technology relates to an image processing device and an image processing method that are capable of efficiently generating a multi-view image. | 03-12-2015 |
20150071351 | INTER PREDICTION METHOD IN WHICH REFERENCE PICTURE LISTS CAN BE CHANGED AND APPARATUS FOR THE SAME - An inter prediction method includes determining whether a restriction condition is provided which restricts an identity of reference picture lists to be used for slices of a same slice type among slices included in a same picture; determining a modification possibility of reference picture lists determined for a same slice among the slices of the same slice type; and determining reference picture lists for blocks in an inter mode that belong to the same slice based on the determining of whether the restriction condition is provided and the determining of the modification possibility of the reference picture lists. | 03-12-2015 |
20150071352 | METHOD AND APPARATUS FOR PROCESSING VIDEO DATA - A method for signalling an intra chroma prediction mode and a method for implementing the signalled intra chroma prediction mode, the intra chroma prediction mode taking an intropolation of previously predicted luma samples from neighboring blocks of video data to attain an intra chroma prediction of a current chroma prediction unit. | 03-12-2015 |
20150071353 | Video Coding - A method comprising: encoding a video image at each of a plurality of frames, including by using inter frame encoding to encode at least portions of some of the frames, thereby generating an encoded video stream; transmitting the encoded video stream over a lossy channel to be decoded at a receiver to produce decoded video; and performing a recovery operation to refresh the encoding of the video image, cutting off error propagation that has occurred in the decoded video due to an effect of inter prediction in presence of loss over said channel; wherein said recovery operation is triggered by a report fed back from the receiver indicative of loss; and wherein the recovery operation is performed over a plural number of frames, refreshing the encoding of different partial frame regions at different respective frames. | 03-12-2015 |
20150078445 | TRANSPOSING A BLOCK OF TRANSFORM COEFFICIENTS, BASED UPON AN INTRA-PREDICTION MODE - Methods and devices for video coding are described. If an intra-prediction mode to be used in encoding a block of residual data is in a specific predetermined class, e.g., the horizontal class, then at least a portion of a quantized transformed block of residual data is transposed during encoding. Likewise, if an intra-prediction mode that was used to generate an encoded block of residual data is in such a class, then at least a portion of an entropy-decoded block of residual data is transposed during decoding. | 03-19-2015 |
20150078446 | METHOD AND APPARATUS FOR INTER-LAYER INTRA PREDICTION - The present invention relates to a method and an apparatus for inter-layer intra prediction. The method for inter-layer intra prediction comprises: a step of determining a reference layer for inter-layer intra prediction; a step of generating intra prediction information from the reference layer; and a step of performing inter-layer prediction on the current block based on the intra prediction information. In cases where the same location block of the reference block corresponding to the prediction object frame on a temporal axis is inter predicted in the reference layer, intra prediction information is generated based on the intra predicted same location block from among the previous and post frames of the reference frame. | 03-19-2015 |
20150078447 | INTRA PREDICTION MODE DERIVATION FOR CHROMINANCE VALUES - A video coding or decoding method in which luminance and chrominance samples are predicted from other respective reference samples according to a prediction direction associated with a current sample to be predicted, the chrominance samples having a lower horizontal and/or vertical sampling rate than the luminance samples so that the ratio of luminance horizontal resolution to chrominance horizontal resolution is different than the ratio of luminance vertical resolution to chrominance vertical resolution, so that a block of luminance samples has a different aspect ratio to a corresponding block of chrominance samples, the method including: detecting a first prediction direction defined in relation to a first grid of a first aspect ratio in respect of a set of current samples to be predicted; and applying a direction mapping to the prediction direction to generate a second prediction direction defined in relation to a second grid of a different aspect ratio. | 03-19-2015 |
20150085926 | IMAGE ENCODING METHOD, IMAGE DECODING METHOD, IMAGE ENCODING DEVICE, AND IMAGE DECODING DEVICE - An image encoding method according to an aspect of the present invention includes: generating, from a plurality of first sub-bitstreams which are obtained by encoding a plurality of images on a per layer basis according to spatial scalable image encoding, a second sub-bitstream including two or more first sub-bitstreams corresponding to two or more layers, the two or more first sub-bitstreams being included in the plurality of first sub-bitstreams; and generating a descriptor including a first field indicating a minimum value for two or more layer identifiers indicating the two or more layers and a second field indicating a maximum value for the two or more layer identifiers. | 03-26-2015 |
20150085927 | Encoder, decoder and methods thereof for video encoding and decoding - According to an embodiment, the encoder is configured to ensure that for each long-term picture i of a RPS of a picture the value of a flag is equal to 1 when there is at least two reference pictures in a decoded picture buffer with LSBs of the POC equal to the LSBs of the respective long-term picture i. When said flag is equal to 1, the long-term picture i is indicated by the full POC. Furthermore, in a decoder, a parameter indicative of whether the respective long-term picture indication i of the RPS should be indicated by the full POC or by the LSBs of the POC is received. A first condition if the received parameter indicates that the long-term picture indication i should be indicated by the LSBs of POC is checked and then a second condition if there are at least two reference pictures in the decoded picture buffer with POC LSB equal to POC LSB of said long-term picture indication i is checked. If both the conditions are fulfilled, it is determined that the video stream is erroneous. | 03-26-2015 |
20150085928 | APPARATUS FOR CODING OR DECODING INTRA IMAGE BASED ON LINE INFORMATION OF REFERENCE IMAGE BLOCK - An apparatus for coding an image is provided to effectively code the image. The apparatus for coding the image includes an input image segmentation unit to segment an input image into a plurality of image blocks including a first image block and a second image block. The apparatus also includes a waveform information generation unit to select a plurality of reference pixels from among pixels included in the first image block, generate first waveform information about the first image block based on a pixel value difference between the selected plurality of reference pixels, and generate second waveform information about the second image block based on a pixel value difference between the pixels included in the second image block. The apparatus also includes a coding unit to code an image included in the second image block based on the first waveform information and the second waveform information. | 03-26-2015 |
20150092843 | DATA STORAGE AND ACCESS IN BLOCK PROCESSING PIPELINES - Block processing pipeline methods and apparatus in which reference data are stored to a memory according to tile formats to reduce memory accesses when fetching the data from the memory. When the pipeline stores reference data from a current frame being processed to memory as a reference frame, the reference samples are stored in macroblock sequential order. Each macroblock sample set is stored as a tile. Reference data may be stored in tile formats for luma and chroma. Chroma reference data may be stored in tile formats for chroma 4:2:0, 4:2:2, and/or 4:4:4 formats. A stage of the pipeline may write luma and chroma reference data for macroblocks to memory according to one or more of the macroblock tile formats in a modified knight's order. The stage may delay writing the reference data from the macroblocks until the macroblocks have been fully processed by the pipeline. | 04-02-2015 |
20150092844 | INTRA-PREDICTION METHOD FOR MULTI-LAYER IMAGES AND APPARATUS USING SAME - An intra-prediction method for multi-layer images is provided. The method comprises the steps of: deriving an intraprediction mode of a predictive target block of an enhanced layer; generating an alternative sample for an unavailable reference sample of the predictive target block on the basis of a reference layer for the enhanced layer; and generating a predictive block for the predictive target block by using the intra-prediction mode and the alternative sample. | 04-02-2015 |
20150092845 | METHOD FOR GENERATING AND RECONSTRUCTING A THREE-DIMENSIONAL VIDEO STREAM, BASED ON THE USE OF THE OCCLUSION MAP, AND CORRESPONDING GENERATING AND RECONSTRUCTING DEVICE - A method is described for generating a three-dimensional video stream by starting from a sequence of video images, said sequence including a first view (V | 04-02-2015 |
20150092846 | DECODING DEVICE AND DECODING METHOD - The present technology relates to a decoding device and a decoding method capable of reducing the amount of information relating to information specifying a reference image. A reception unit receives inter_ref_pic_set_prediction_flag representing whether reference image specifying information specifying a reference image, which is used for generating a predicted image, of a prior image that is an image prior to a current coding image in coding order that is transmitted in a case where the current coding image is an image other than a first image of a GOP (Group of Picture) is used as the reference image specifying information of the current coding image. The present technology, for example, can be applied to a decoding device of an HEVC (High Efficiency Video Coding) system. | 04-02-2015 |
20150092847 | Hardware Efficient Sparse FIR Filtering in Video Codec - In an embodiment, a control map of false contour filtering is generated for a predicted image. The predicted image is predicted from a low dynamic range image mapped from the wide dynamic range image. Based at least in part on the control map of false contour filtering and the predicted image, one or more filter parameters for a sparse finite-impulse-response (FIR) filter are determined. The sparse FIR filter is applied to filter pixel values in a portion of the predicted image based at least in part on the control map of false contour filtering. The control map of false contour filtering is encoded into a part of a multi-layer video signal that includes the low dynamic range image. | 04-02-2015 |
20150092848 | METHOD, DEVICE AND SYSTEM FOR RESIZING ORIGINAL DEPTH FRAME INTO RESIZED DEPTH FRAME - A method, a device and a system for resizing an original depth frame into a resized depth frame. The method for resizing an original depth frame into a resized depth frame includes the steps of: obtaining two sub-pixel values from at least two pixels of the original depth frame, respectively; and storing the two sub-pixel values into corresponding two sub-pixels of one pixel of the resized depth frame, respectively. | 04-02-2015 |
20150092849 | VIDEO DECODING PROCESSING APPARATUS AND OPERATING METHOD THEREOF - Disclosed is a video decoding processing apparatus which can reduce overhead for the start of parallel decoding processing. The video decoding processing apparatus includes a parsing unit, and first and second video processing units. A coding bit stream including information of largest coding units each having at least a prescribed pixel size is supplied to an input terminal of the parsing unit. The parsing unit performs parsing of the syntax of the coding bit stream to thereby generate parallel-processable first and second intermediate streams from the largest coding unit. The first and second video processing units parallel-process the first and second intermediate streams generated from the parsing unit. | 04-02-2015 |
20150092850 | Weighted Multi-Band Cross Color Channel Predictor - A sequence of visual dynamic range (VDR) images is encoded using a standard dynamic range (SDR) base layer and one or more enhancement layers. A predicted VDR image is generated from an SDR input by using a weighted, multi-band, cross-color channel prediction model. Exponential weights with an adaptable decay parameter for each band are also presented. | 04-02-2015 |
20150098503 | HIGH PRECISION EXPLICIT WEIGHTED PREDICTION FOR VIDEO CODING - In one example, a device for coding video data includes a memory configured to store video data, and a video coder configured to code a value for a syntax element representative of whether a high bit depth is enabled for the video data, and when the value for the syntax element indicates that the high bit depth is enabled: code a value for a syntax element representative of the high bit depth for one or more parameters of the video data, code values for the parameters such that the values for the parameters are representative of bit depths that are based on the value for the syntax element representative of the high bit depth, and code the video data based at least in part on the values for the parameters. | 04-09-2015 |
20150098504 | BLOCK VECTOR CODING FOR INTRA BLOCK COPYING - An example method for decoding video data includes receiving a plurality of syntax elements that define a component of a block vector for a current block of video data as part of intra block copying, and determining the component of the block vector based on the plurality of syntax elements by at least: determining, based on a first syntax element, whether or not an absolute value of the component of the block vector is nonzero; determining, based on a second syntax element, the absolute value of the component of the block vector minus an offset; determining, based on a third syntax element, whether the value of the component of the block vector is positive or negative; and determining, based on the first, second, and third syntax elements, whether or not the absolute value of the component of the block vector is greater than one. | 04-09-2015 |
20150098505 | METHOD AND APPARATUS OF DERIVING INTRA PREDICTION MODE USING MOST PROBABLE MODE GROUP - Provided is a method that constructs an MPM group including three intra prediction modes, determines the intra prediction mode of the MPM group specified by the prediction mode index as the intra prediction mode of the current prediction unit if the mode group indicator indicates the MPM group, and derives the intra prediction mode of the current prediction unit using the prediction mode index and the three prediction modes of the MPM group if the mode group indicator does not indicate the MPM group. Accordingly, additional bits resulted from increase of a number of intra prediction mode are effectively reduced. Also, an image compression ratio can be improved by generating a prediction block similar to an original block. | 04-09-2015 |
20150098506 | METHOD AND APPARATUS OF DERIVING INTRA PREDICTION MODE USING MOST PROBABLE MODE GROUP - Provided is a method that constructs an MPM group including three intra prediction modes, determines the intra prediction mode of the MPM group specified by the prediction mode index as the intra prediction mode of the current prediction unit if the mode group indicator indicates the MPM group, and derives the intra prediction mode of the current prediction unit using the prediction mode index and the three prediction modes of the MPM group if the mode group indicator does not indicate the MPM group. Accordingly, additional bits resulted from increase of a number of intra prediction mode are effectively reduced. Also, an image compression ratio can be improved by generating a prediction block similar to an original block. | 04-09-2015 |
20150103896 | INTER-LAYER PREDICTION METHOD AND ENCODING DEVICE AND DECODING DEVICE USING SAME - The present invention relates to an inter-layer prediction method, and an encoder and a decoder using the same, the inter-layer prediction method including specifying a reference block in a reference layer and predicting a current block in a current layer using information on the reference block, wherein the specifying of the reference block includes specifying the reference block on the basis of a reference position which is a position in the reference layer corresponding to a current position in the current layer for specifying the current block. | 04-16-2015 |
20150103897 | IMAGE ENCODING/DECODING METHOD AND DEVICE USING SAME - The image decoding method according to the present invention comprises the steps of: determining the availability of a block adjacent to a current block; configuring a merge candidate list for the current block on the basis of the result of the determined availability; and performing motion compensation for the current block on the basis of the merge candidate list, wherein the step of determining availability comprises the steps of inducing block availability information on the adjacent block and inducing the availability of motion information on the adjacent block, and the step of determining the availability of the adjacent block is such that when there is more than one adjacent block, the availability of adjacent blocks can be determined in accordance with a predetermined order restriction. | 04-16-2015 |
20150103898 | WEIGHTED PREDICTION PARAMETER SIGNALING FOR VIDEO CODING - Systems, methods, and instrumentalities are provided to implement weighted prediction (WP) signaling, A decoding device may receive a plurality of first list WP parameters, and a. weights present flag. The weights present flag may indicate whether a plurality of second list WP parameters are signaled. The decoding device may receive the second list WP parameters when the weights present flag indicates that the second list WP parameters are signaled. The plurality of second list WP parameters may be derived when the weights present flag indicates that the second list WP parameters are not signaled. The decoding device may receive a delta parameter present, flag, which may indicate whether a plurality of delta WP parameters are signaled. The decoding device may receive the delta WP parameters, when the delta parameter present flag indicates that the plurality of the delta WP parameters are signaled. | 04-16-2015 |
20150103899 | SCALABLE ENCODING AND DECODING - A method for scalable encoding of a digital image into a base layer and at least one enhancement layer comprising an up-sampling step providing at least one part of an enhancement layer, based on a corresponding part of a lower layer having a lower level than the considered enhancement layer, the area of said corresponding parts having a scale factor of 4 | 04-16-2015 |
20150103900 | METHOD AND APPARATUS OF INTER-LAYER FILTERING FOR SCALABLE VIDEO CODING - A method and apparatus for inter-layer prediction for scalable video coding are disclosed. Embodiments according to the present invention apply inter-layer adaptive filtering to the video data derived from the reconstructed BL video data to generate inter-layer adaptive filtered data. The inter-layer adaptive filtered data is then included as prediction data to encode or decode the EL video data. The video data derived from the reconstructed BL video data is up-sampled before applying inter-layer adaptive filtering. The up-sampling may also be included in the inter-layer adaptive filtering. In another embodiment, the inter-layer adaptive filtering comprises adaptive up-sampling. For up-sampled BL video data at locations not collocated with the EL video data, the up-sampled BL video data is divided into location types according to locations of the up-sampled BL video data. Each location type may have an individual filter for up-sampling video data in the group. | 04-16-2015 |
20150103901 | IMAGE PROCESSING APPARATUS AND IMAGE PROCESSING METHOD - Provided is an image processing apparatus including a decoding section configured to decode a difference from a previous value of a prediction parameter used when an image of a second layer having a different color gamut from a first layer is predicted from an image of the first layer, and a prediction section configured to predict the image of the second layer from the image of the first layer using the prediction parameter calculated using the difference decoded by the decoding section. | 04-16-2015 |
20150103902 | THREE-DIMENSIONAL LOOKUP TABLE BASED COLOR GAMUT SCALABILITY IN MULTI-LAYER VIDEO CODING - Techniques are described for 3D lookup table based color gamut scalability in multi-layer video coding. A lower layer of video data may include color data in a first color gamut and a higher layer of the video data may include color data in a second color gamut. To generate inter-layer reference pictures, a video coder performs color prediction to convert the color data of a reference picture in the first color gamut to the second color gamut. The video coder may perform color prediction using a 3D lookup table. According to the techniques, the video coder generates at least one 3D lookup table having a size that is different for a luma component than for a first chroma component and a second chroma component. In this way, the total size of the table may be reduced while maintaining good coding performance. | 04-16-2015 |
20150103903 | DEVICE AND METHOD FOR SCALABLE CODING OF VIDEO INFORMATION - An apparatus configured to code video information includes a memory unit and a processor in communication with the memory unit. The memory unit is configured to store video information associated with a first video layer having a first picture in a first access unit. The processor is configured to determine whether the first picture in the first access unit is an intra random access point (IRAP) picture, and in response to determining that the first picture in the first access unit is an IRAP picture, provide an indication, in a bitstream, to reset a picture order count (POC) of at least one other picture in the first access unit, wherein the at least one other picture is not an IRAP picture. The processor may encode or decode the video information. | 04-16-2015 |
20150103904 | SYSTEMS AND METHODS FOR INTER-LAYER RPS DERIVATION BASED ON SUB-LAYER REFERENCE PREDICTION DEPENDENCY - Systems and methods for inter-layer reference picture set derivation based on sub-layer reference prediction dependency are described herein. One aspect of the subject matter described in the disclosure provides a video encoder comprising a memory configured to store one or more direct reference layer pictures of one or more current pictures in a sequence, wherein the one or more current pictures are associated with a current layer, the current layer being associated with the one or more direct reference layers. The video encoder further comprises a processor in communication with the memory unit. The memory unit is configured to set an indication associated with a current picture to indicate whether all of the one or more direct reference layer pictures of the current picture that are not restricted for use in inter-layer prediction are included in an inter-layer reference picture set associated with the current picture. | 04-16-2015 |
20150103905 | SYSTEMS AND METHODS FOR SEPARATELY DEFINING DEPENDENCIES FOR SUB-LAYER BASED INTER-LAYER PREDICTION - Systems and methods for separately defining and indicating inter-layer prediction dependencies for a first layer with respect to each of a number of enhancement layers associated with the first layer are described herein. One aspect of the subject matter described in the disclosure provides a video encoder comprising a memory unit configured to store a first picture associated with a first layer and enhancement layer pictures associated with a plurality of enhancement layers. The video encoder further comprises a processor in communication with the memory unit. The processor is configured to provide a separate indication for each of the enhancement layers that indicates whether the first picture can be used for inter-layer prediction of the enhancement layer picture in a respective enhancement layer. | 04-16-2015 |
20150103906 | WEDGELET PATTERN EXTENSION FOR DEPTH INTRA CODING - Techniques are described determining a partition pattern for intra-prediction encoding or decoding a depth block from a partition pattern of one or more partition patterns associated with smaller sized blocks. A video encoder may intra-prediction encode the depth block based on the determined partition pattern, and a video decoder may intra-prediction decode the depth block based on the determine partition pattern. | 04-16-2015 |
20150103907 | SUPPORT FOR LARGE NUMBERS OF VIEWS IN MULTI-LAYER CODING - A computing device obtains a Network Abstraction Layer (NAL) unit header of a NAL unit of the multi-layer video data. The NAL unit header comprises a layer identifier syntax element having a value that specifies an identifier of a layer of the NAL unit. The layer identifier syntax element comprises a plurality of bits that represent the value within a defined range of values. A requirement of the bitstream conforming to a video coding standard is that the value of the layer identifier syntax element is less than the maximum value of the range of values. | 04-16-2015 |
20150103908 | METHOD AND APPARATUS FOR A LOW COMPLEXITY TRANSFORM UNIT PARTITIONING STRUCTURE FOR HEVC - A method and apparatus for a low complexity transform unit partitioning structure for High Efficiency Video Coding (HEVC). The method includes determining prediction unit size of a coding unit, and setting the size of transform unit size of Y, U and V according to the prediction unit size of the coding unit. | 04-16-2015 |
20150110180 | METHOD AND APPARATUS FOR INTRA TRANSFORM SKIP MODE - A method and apparatus for video coding including an Intra transform Skip mode is disclosed. When the transform Skip mode is ON for a transform unit, embodiments according to the present invention apply different coding processes to the transform unit. The coding process with the transform Skip mode ON uses a different scan pattern from the coding process with the transform Skip mode OFF. According to various embodiments, the transform Skip mode is enabled when the transform unit size is 4×4, the prediction unit and the transform unit having the same size, or the prediction unit uses an INTRA_N×N mode. When the transform Skip mode is enabled, a flag can be signaled in the bitstream to indicate the transform Skip mode selection. Furthermore, the flag can be incorporated in a picture level, a slice level or a sequence level of the video bitstream. | 04-23-2015 |
20150110181 | METHODS FOR PALETTE PREDICTION AND INTRA BLOCK COPY PADDING - A method is provided that includes receiving a bitstream. The method also includes parsing the bitstream for a flag indicating whether a palette was used from a first or second coding unit. The method also includes decoding the first coding unit using the palette from the first or second coding unit indicated by the flag. The palette is determined based on which palette of the first or second coding unit improves compression performance. Also, a method is provided that includes receiving a bitstream with a predicted pixel. A coding unit and a reference unit are identified. A number of pixels of the coding unit and the reference unit overlap. A set of available pixels and a set of unavailable pixels of the reference unit are identified. The predicted pixel of the set of unavailable pixels is estimated as a pixel of the set of available pixels. | 04-23-2015 |
20150110182 | IMAGE DECODING METHOD, IMAGE CODING METHOD, IMAGE DECODING APPARATUS, IMAGE CODING APPARATUS, PROGRAM, AND INTEGRATED CIRCUIT - An image decoding method decodes a coded stream which includes processing units and a header of the processing units, and which is generated by coding a moving picture using inter prediction. The processing units includes at least one processing unit divided in a hierarchy, the hierarchy including a highest hierarchical layer in which a coding unit exists as a largest processing unit and a lower hierarchical layer in which a prediction unit exists. The method includes identifying, by parsing hierarchy depth information stored in the header and indicating a hierarchical layer higher than a lowest hierarchical layer in which a smallest prediction unit exits, a hierarchical layer which is indicated by the hierarchy depth information or a hierarchical layer higher than the indicated hierarchical layer. The hierarchical layer includes a prediction unit in which a reference index is stored. The prediction unit is decoded using the reference index. | 04-23-2015 |
20150110183 | IMAGE PREDICTIVE ENCODING AND DECODING DEVICE - An image predictive encoding device can efficiently encode an image, while suppressing an increase in prediction information and reducing the prediction error of a target block. In an image predictive encoding device, according to one embodiment, to produce a prediction signal of a partition in a target region, it is decided whether prediction information of a neighbouring region can be used. When prediction information of the neighbouring region can be used, a region width of the partition where the prediction information of the neighbouring region is used to produce the prediction signal is determined. The prediction signal of the target region is produced from a reconstructed signal based on at least one of the region width, the prediction information of the target region, and the prediction information of the neighbouring region. The prediction information, information identifying the region width, and a residual signal are encoded. | 04-23-2015 |
20150110184 | DYNAMIC IMAGE PREDICTIVE ENCODING AND DECODING DEVICE, METHOD, AND PROGRAM - A video predictive encoding device can include an input device to implement input of pictures constituting a video sequence; an encoder to encode the pictures by intra-prediction or inter-prediction and to encode output order information of each picture and information about a picture type of each picture to generate compressed picture data. The compressed picture data includes a picture to serve as a random access point. The video predictive coding device can also include a reconstruction unit to decode the compressed picture data to reconstruct pictures; a picture storage unit to store one or more of the reconstructed pictures as reference pictures to be used for encoding of a subsequent picture; and a controller to determine the picture type and control the picture storage unit based on the determined picture type. The controller can label each picture as one of following three types: CRA picture, type-1 picture and type-2 picture. | 04-23-2015 |
20150110185 | METHOD AND APPARATUS FOR ENCODING INTRA PREDICTION INFORMATION - A method for encoding an intra prediction mode according to the present invention selects an intra prediction mode for a current block, determines the number of valid MPM candidates by checking the validity of MPM candidates of the current block, and if the number of valid MPM candidates is less than a previously set number, adds additional intra prediction modes as MPM candidates. MPM candidates can be adaptively added on the basis of the directionality of valid MPM candidates. Additionally, during the encoding of residual intra prediction modes, residual intra prediction modes are realigned on the basis of the directionality of valid MPM candidates. Accordingly, the present invention minimizes the information for encoding the intra prediction mode of the current block by adding MPM candidates or realigning the residual intra prediction modes on the basis of the directionality of valid MPM candidates. | 04-23-2015 |
20150110186 | METHOD AND APPARATUS FOR ENCODING INTRA PREDICTION INFORMATION - A method for encoding an intra prediction mode according to the present invention selects an intra prediction mode for a current block, determines the number of valid MPM candidates by checking the validity of MPM candidates of the current block, and if the number of valid MPM candidates is less than a previously set number, adds additional intra prediction modes as MPM candidates. MPM candidates can be adaptively added on the basis of the directionality of valid MPM candidates. Additionally, during the encoding of residual intra prediction modes, residual intra prediction modes are realigned on the basis of the directionality of valid MPM candidates. Accordingly, the present invention minimizes the information for encoding the intra prediction mode of the current block by adding MPM candidates or realigning the residual intra prediction modes on the basis of the directionality of valid MPM candidates. | 04-23-2015 |
20150110187 | METHOD AND APPARATUS FOR ENCODING INTRA PREDICTION INFORMATION - A method for encoding an intra prediction mode according to the present invention selects an intra prediction mode for a current block, determines the number of valid MPM candidates by checking the validity of MPM candidates of the current block, and if the number of valid MPM candidates is less than a previously set number, adds additional intra prediction modes as MPM candidates. MPM candidates can be adaptively added on the basis of the directionality of valid MPM candidates. Additionally, during the encoding of residual intra prediction modes, residual intra prediction modes are realigned on the basis of the directionality of valid MPM candidates. Accordingly, the present invention minimizes the information for encoding the intra prediction mode of the current block by adding MPM candidates or realigning the residual intra prediction modes on the basis of the directionality of valid MPM candidates. | 04-23-2015 |
20150110188 | MOVING PICTURE CODING METHOD, AND MOVING PICTURE DECODING METHOD - A moving picture coding apparatus for performing inter-picture predictive coding for pictures constituting a moving picture is provided with a coding unit for performing predictive error coding for image data; a decoding unit for performing predictive error decoding for an output from the coding unit; a reference picture memory for holding output data from the decoding unit; and a motion vector detection unit for detecting motion vectors on the basis of the decoded image data stored in the memory. When coding a B picture as a target picture, information indicating whether or not the target picture should be used as a reference picture when coding another picture is added as header information. Therefore, in a decoding apparatus for decoding a bit stream Bs outputted from the moving picture coding apparatus, management of a memory for holding the reference picture can be facilitated on the basis of the header information. | 04-23-2015 |
20150110189 | VIDEO PREDICTIVE ENCODING DEVICE AND SYSTEM, VIDEO PREDICTIVE DECODING DEVICE AND SYSTEM - A video predictive encoding device includes an input module to receive pictures forming a video sequence, and an encoding module to encode the pictures by either intra prediction or inter prediction to generate compressed picture data, and to packetize the compressed image data along with packet header information. The packet header information includes a picture type. The encoding module determines the picture type so as to uniquely indicate whether encoded picture data is used for reference in decoding of another picture. | 04-23-2015 |
20150117526 | METHOD FOR ENCODING MULTIVIEW VIDEO USING REFERENCE LIST FOR MULTIVIEW VIDEO PREDICTION AND DEVICE THEREFOR, AND METHOD FOR DECODING MULTIVIEW VIDEO USING REFERENCE LIST FOR MULTIVIEW VIDEO PREDICTION AND DEVICE THEREFOR - Provided are methods of encoding and decoding a multiview video by performing inter-prediction and inter-view prediction on each view image of the multiview video. | 04-30-2015 |
20150117527 | FILTERING OF PREDICTION UNITS ACCORDING TO INTRA PREDICTION DIRECTION - A video coding or decoding method in which luminance and chrominance samples in a 4:4:4 format or a 4:2:2 format are predicted from other respective samples according to a prediction direction associated with blocks of samples to be predicted; comprises detecting a prediction direction in respect of a current block to be predicted; generating a predicted block of chrominance samples according to other chrominance samples defined by the prediction direction; if the detected prediction direction is substantially vertical, filtering the left column of samples in the predicted block of chrominance samples, or if the detected prediction direction is substantially horizontal, filtering the top row of samples in the predicted block of chrominance samples; and encoding a difference between the filtered predicted chrominance block and the actual chrominance block or applying a decoded difference to the filtered predicted chrominance block so as to encode or decode the block respectively. | 04-30-2015 |
20150117528 | VIDEO ENCODING DEVICE AND DRIVING METHOD THEREOF - A video encoding device includes a pixel offset pre-calculation part configured to generate a loop-filtered pixel from a coding information and at least one of a source pixel, a predicted pixel and a restructured pixel, and configured to generate an offset from the loop-filtered pixel by performing a sample adaptive offset operation. The video encoding device also includes an entropy coding part configured to generate a bit stream from the offset. | 04-30-2015 |
20150117529 | VIDEO PREDICTIVE ENCODING DEVICE, VIDEO PREDICTIVE ENCODING METHOD, VIDEO PREDICTIVE ENCODING PROGRAM, VIDEO PREDICTIVE DECODING DEVICE, VIDEO PREDICTIVE DECODING METHOD, AND VIDEO PREDICTIVE DECODING PROGRAM - A video prediction encoding device provided with a picture storage unit storing, as reference pictures to be used for encoding of a subsequent picture, one or more of reconstructed pictures restored from compressed picture data and a memory control unit to control a frame memory in the picture storage unit. When a frame size of input pictures is not more than 1/(2̂L) (where L is an integer of one or more) of a maximum frame size of pictures, the memory control unit determines that (2̂L) times the maximum number of reconstructed pictures are storable in the frame memory. | 04-30-2015 |
20150117530 | METHOD AND APPARATUS FOR ENCODING VIDEO, AND METHOD AND APPARATUS FOR DECODING VIDEO - Disclosed are a method and apparatus for encoding a video, and a method and apparatus for decoding a video, in which neighboring pixels used to perform intra prediction on a current block to be encoded are filtered and intra prediction is performed by using the filtered neighboring pixels. | 04-30-2015 |
20150117531 | METHOD OF DECODING MOVING PICTURES IN INTRA PREDICTION - A method of decoding an image is disclosed. The method comprises deriving an intra prediction mode; generating reference pixels if there exist unavailable reference pixels of a current block; determining whether reference pixels of the current block are filtered or not based on the intra prediction mode and a size of the current block; selecting a filter using the size of the current block and difference between reference pixels and filtering the reference pixels of the current block using the selected filter if it is determined that the reference pixels of the current block are filtered; and generating the prediction block according to the intra prediction mode. | 04-30-2015 |
20150117532 | DETERMINING INTRA PREDICTION MODE OF IMAGE CODING UNIT AND IMAGE DECODING UNIT - A method for decoding an image including performing intra prediction on a chrominance block according to whether the intra prediction mode of the chrominance block is equal to an intra prediction mode of a luminance block. | 04-30-2015 |
20150117533 | DETERMINING INTRA PREDICTION MODE OF IMAGE CODING UNIT AND IMAGE DECODING UNIT - A method and apparatus for determining an intra prediction mode of a coding unit. Candidate intra prediction modes of a chrominance component coding unit, which includes an intra prediction mode of a luminance component coding unit, are determined, and costs of the chrominance component coding unit according to the determined candidate intra prediction modes are compared to determine a minimum cost intra prediction mode to be the intra prediction mode of the chrominance component coding unit. | 04-30-2015 |
20150124875 | CROSS-LAYER CROSS-CHANNEL RESIDUAL PREDICTION - Systems, apparatus and methods are described including operations for video coding including cross-layer cross-channel residual prediction. | 05-07-2015 |
20150124876 | TRANSFORM METHOD BASED ON BLOCK INFORMATION, AND APPARATUS USING SAID METHOD - Disclosed are a transform method based on block information and an apparatus using the method. An image-decoding method comprises: a step of taking information on a block as an input; and a transform method determination step of determining an inverse transform method for the block on the basis of whether or not the prediction mode of the block is an intra-prediction mode, whether or not the size of the block satisfies a predetermined condition, and whether or not the block is a block for a luminance sample. Accordingly, encoding efficiency can be improved by using an appropriate transform method on the basis of the information on a prediction block and an intra-prediction mode. | 05-07-2015 |
20150124877 | MULTIVIEW VIDEO ENCODING METHOD USING REFERENCE PICTURE SET FOR MULTIVIEW VIDEO PREDICTION AND DEVICE THEREFOR, AND MULTIVIEW VIDEO DECODING METHOD USING REFERENCE PICTURE SET FOR MULTIVIEW VIDEO PREDICTION AND DEVICE THEREFOR - Methods of encoding and decoding multi-view video by performing inter-prediction and inter-view prediction on each of pictures of multi-view video according to views are provided. A prediction encoding method of encoding a multi-view video includes determining a reference picture set; determining at least one reference list between a first reference list and a second reference list; determining one reference picture and reference block for a current block of the current picture using the determined one reference list; and performing inter-prediction or inter-view prediction for the current block using the reference block. | 05-07-2015 |
20150124878 | MULTIPLE REFERENCE LAYER PREDICTION SIGNALING TECHNIQUES - The disclosed subject matter, in one embodiment, provides techniques to signal inter-layer texture and motion prediction from different direct dependent reference layers. In certain exemplary arrangements, techniques are provided which include one or more syntax elements in a high level syntax structure, e.g., the slice segment header, indicating such different direct dependent reference layer(s). | 05-07-2015 |
20150124879 | INTRA PREDICTION DEVICE FOR IMAGE - A device for performing intra prediction for an image is disclosed. The disclosed intra prediction device includes: a subtractor configured to perform a subtraction operation on a first reference value and a second reference value of a prediction target pixel; a multiplier configured to perform a multiplication operation on a parameter set for each angular mode and an output value of the subtractor; and an adder configured to perform an addition operation on a product of the first reference value multiplied by a predetermined constant and an output value of the multiplier, where an output value of the adder is a resultant value of intra prediction for the image according to an angular mode. | 05-07-2015 |
20150124880 | METHOD OF DECODING MOVING PICTURES IN INTRA PREDICTION - A method of encoding an image is disclosed. The method comprises determining an intra prediction mode; generating a reference pixel if there exist unavailable reference pixels of a current block; determining whether reference pixels of the current block are filtered or not based on the intra prediction mode and a size of the current block; selecting a filter using the size of the current block and difference between reference pixels and filtering the reference pixels of the current block using the selected filter if it is determined that the reference pixels of the current block are filtered; and generating the prediction block according to the intra prediction mode. | 05-07-2015 |
20150124881 | DETERMINING INTRA PREDICTION MODE OF IMAGE CODING UNIT AND IMAGE DECODING UNIT - A method for decoding an image including performing intra prediction on a chrominance block according to whether the intra prediction mode of the chrominance block is equal to an intra prediction mode of a luminance block. | 05-07-2015 |
20150131720 | Spatial Scalable Video Multicast for Heterogeneous MIMO Systems - A multiplexed space-time block coding (M-STBC) scheme is described that allows for transmitting a single multicast transmission in a heterogeneous MIMO (i.e., multiple-input and multiple-output) environment, where receivers with fewer antennas can receive a lower resolution version of the multi-cast transmission, while receivers with a greater number of antennas can receive a higher resolution version of the multi-cast transmission. Thus, the M-STBC scheme allows for transmitting the single multicast transmission that includes both a spatial multiplexing mode and a diversity mode. | 05-14-2015 |
20150131721 | Simplified Processing of Weighted Prediction Syntax and Semantics Using a Bit Depth Variable for High Precision Data - Particular embodiments may remove a condition check in the semantics for checking a high-precision data flag. This simplifies the semantics used in the encoding and decoding process. In this case, even if the high-precision data flag is not set, the value of the weighted prediction syntax element is set by the BitDepth variable. However, even if the BitDepth is not considered high-precision data, such as 8 bits, the range for the weighted prediction syntax element is still the same as the fixed value. For example, the syntax elements luma_offset_l0[i], luma_offset_l1[i], delta_chroma_offset_l0[i][j], and delta_chroma_offset_l1[i][j] use the variable BitDepth as described above whether the flag extended_precision_processing_flag is enabled and not enabled to indicate whether the bit depth is above a threshold. | 05-14-2015 |
20150131722 | Method and Apparatus of Improved Intra Luma Prediction Mode Coding - A method of video coding using intra prediction for a block of video data is disclosed. The intra prediction modes are ranked according to a priority order associated with the block size. One or more tables are used, where the tables ranks the intra prediction modes according to a first priority order for the block having a first block size and ranks the intra prediction modes according to a second priority order for the block having a second block size. Two or more neighboring intra prediction modes corresponding to two or more neighboring blocks are received, where each neighboring block has a neighboring block size corresponding to the first block size or the second block size. A highest-priority mode among said two or more neighboring intra prediction modes is selected as the most probable mode. The current mode is then encoded or decoded using the most probable mode as a predictor. | 05-14-2015 |
20150131723 | METHOD AND APPARATUS FOR ENCODING VIDEO BASED ON SCANNING ORDER OF HIERARCHICAL DATA UNITS, AND METHOD AND APPARATUS FOR DECODING VIDEO BASED ON SCANNING ORDER OF HIERARCHICAL DATA UNITS - A video decoding method and apparatus and a video encoding method and apparatus based on a scanning order of hierarchical data units are provided. The decoding method includes: receiving and parsing a bitstream of an encoded video; extracting from the bitstream information about a size of a maximum coding unit for decoding a picture of the encoded video, and encoding information about a coded depth and an encoding mode for coding units of the picture, wherein the size of the maximum coding unit is a maximum size of a coding unit which is a data unit for decoding the picture; and determining a hierarchical structure of the maximum coding unit and the coding units into which the picture is divided according to depths, and decoding the picture based on the coding units, by using the information about the size of the maximum coding unit and the encoding information about the coded depth and the encoded mode. | 05-14-2015 |
20150139310 | IMAGE PROCESSING APPARATUS AND IMAGE PROCESSING METHOD - The present technique relates to an image processing apparatus and an image processing method capable of suppressing deterioration in accuracy of a predicted image and reducing the number of storable reference images. A motion prediction/compensation unit generates a predicted image of an encoding target image by using a reference image. A frame memory is, for example, a decoded picture buffer (DPB) and preferentially stores the reference image of which display order is close to that of the encoding target image. The present technique may be applied to, for example, an encoding device using a high efficiency video coding (HEVC) scheme. | 05-21-2015 |
20150139311 | METHOD AND APPARATUS FOR PERFORMING BLOCK PREDICTION SEARCH BASED ON RESTORED SAMPLE VALUES DERIVED FROM STORED SAMPLE VALUES IN DATA BUFFER - A block prediction search method includes at least following steps: utilizing a data buffer to store bit-depth reduced sample values of a plurality of samples in a first pixel line; detecting occurrence of an edge in the first pixel line according to restored sample values derived from stored sample values in the data buffer; and determining a block prediction vector for a pixel group in a second pixel line different from the first pixel line, wherein the block prediction vector is determined based at least partly on a last edge count value indicative of a number of samples in the first pixel line that have gone by since the edge occurs. | 05-21-2015 |
20150139312 | METHOD AND APPARATUS FOR ENCODING VIDEO BY USING DEBLOCKING FILTERING, AND METHOD AND APPARATUS FOR DECODING VIDEO BY USING DEBLOCKING FILTERING - A method and apparatus for encoding video by using deblocking filtering, and a method and apparatus for decoding video by using deblocking filtering are provided. The method of encoding video includes: splitting a picture into a maximum coding unit; determining coding units of coded depths and encoding modes for the coding units of the maximum coding unit by prediction encoding the coding units of the maximum coding unit based on at least one prediction unit and transforming the coding units based on at least one transformation unit, wherein the maximum coding unit is hierarchically split into the coding units as a depth deepens, and the coded depths are depths where the maximum coding unit is encoded in the coding units; and performing deblocking filtering on video data being inversely transformed into a spatial domain in the coding units, in consideration of the encoding modes. | 05-21-2015 |
20150139313 | METHOD AND APPARATUS FOR ENCODING VIDEO BY USING DEBLOCKING FILTERING, AND METHOD AND APPARATUS FOR DECODING VIDEO BY USING DEBLOCKING FILTERING - A method and apparatus for encoding video by using deblocking filtering, and a method and apparatus for decoding video by using deblocking filtering are provided. The method of encoding video includes: splitting a picture into a maximum coding unit; determining coding units of coded depths and encoding modes for the coding units of the maximum coding unit by prediction encoding the coding units of the maximum coding unit based on at least one prediction unit and transforming the coding units based on at least one transformation unit, wherein the maximum coding unit is hierarchically split into the coding units as a depth deepens, and the coded depths are depths where the maximum coding unit is encoded in the coding units; and performing deblocking filtering on video data being inversely transformed into a spatial domain in the coding units, in consideration of the encoding modes. | 05-21-2015 |
20150139314 | METHOD AND APPARATUS FOR CODING VIDEO AND METHOD AND APPARATUS FOR DECODING VIDEO, USING INTRA PREDICTION - A video decoding method involving intra prediction includes: parsing a most probable mode (MPM) flag of a block while parsing symbols of the block of an encoded video from a received bitstream; determining whether a predetermined number of a plurality of candidate intra prediction modes are used to predict an intra prediction mode of the block based on the MPM flag; when it is determined that the plurality of candidate intra prediction modes are used based on the MPM flag, determining the plurality of candidate intra prediction modes based on intra prediction modes of a left block and an upper block that are adjacent to the block while restoring the intra prediction mode of the block by using the parsed symbols. | 05-21-2015 |
20150139315 | METHOD AND APPARATUS FOR ENCODING VIDEO BASED ON SCANNING ORDER OF HIERARCHICAL DATA UNITS, AND METHOD AND APPARATUS FOR DECODING VIDEO BASED ON SCANNING ORDER OF HIERARCHICAL DATA UNITS - A video decoding method and apparatus and a video encoding method and apparatus based on a scanning order of hierarchical data units are provided. The decoding method includes: receiving and parsing a bitstream of an encoded video; extracting from the bitstream information about a size of a maximum coding unit for decoding a picture of the encoded video, and encoding information about a coded depth and an encoding mode for coding units of the picture, wherein the size of the maximum coding unit is a maximum size of a coding unit which is a data unit for decoding the picture; and determining a hierarchical structure of the maximum coding unit and the coding units into which the picture is divided according to depths, and decoding the picture based on the coding units, by using the information about the size of the maximum coding unit and the encoding information about the coded depth and the encoded mode. | 05-21-2015 |
20150139316 | IMAGE CODING METHOD, IMAGE DECODING METHOD, IMAGE CODING APPARATUS, IMAGE DECODING APPARATUS, AND IMAGE CODING AND DECODING APPARATUS - An image coding method includes: writing, into a sequence parameter set, buffer description defining information for defining a plurality of buffer descriptions; selecting one of the buffer descriptions for each processing unit that is a picture or a slice, and writing buffer description selecting information for specifying the selected buffer description, into a first header of the processing unit which is included in the coded bitstream; and coding the processing unit using the selected buffer description, and the buffer description defining information includes long-term information for identifying, among a plurality of reference pictures indicated in the buffer descriptions, a reference picture to be assigned as a long-term reference picture. | 05-21-2015 |
20150139317 | METHOD AND APPARATUS FOR ENCODING IMAGE, AND METHOD AND APPARATUS FOR DECODING IMAGE - The present invention discloses a method and an apparatus for encoding an image, and a method and an apparatus for decoding a message. The method for decoding the image comprises the steps of: entropy-decoding a bit stream that is received, to recover a residual value by reverse-quantizing and reverse-converting the residual value; performing inter prediction with respect to a prediction unit that is divided into at least two units by applying an asymmetric partition division method, wherein the prediction unit that is divided comprises a first divided prediction unit and a second divided prediction unit; and recovering the image by adding the residual value to a final prediction unit, wherein the step of generating the final prediction unit can comprise a step of interpolating by using a filter tap, which has a variable length in a horizontal or perpendicular direction depending on the length of the first divided prediction unit, so that pixels that belong to the second divided prediction unit is not included in the interpolation. | 05-21-2015 |
20150139318 | METHOD AND APPARATUS FOR INTRA PREDICTION WITHIN DISPLAY SCREEN - The present invention relates to a method and apparatus for intra prediction. The intra prediction method for a decoder, according to the present invention, comprises the steps of entropy-decoding a received bitstream, generating reference pixels to be used in the intra prediction of a prediction unit; generating a prediction block from the reference pixels on the basis of a prediction mode for the prediction unit and reconstructing an image from the prediction block and a residual block, which is obtained as a result of entropy encoding, wherein the reference pixels and/or the prediction block pixels are predicted on the basis of a base pixel, and the predicted pixel value can be the sum of the pixel value of the base pixel and the difference between the pixel values of the base pixel and the generated pixel. | 05-21-2015 |
20150139319 | METHOD AND APPARATUS FOR ENCODING/DECODING IMAGES USING A PREDICTION METHOD ADOPTING IN-LOOP FILTERING - Disclosed is a prediction method adopting in-loop filtering. According to the present invention, a prediction method for encoding and decoding video comprises the following steps: generating a residual block of the current block through an inverse quantization and inverse transform; generating a prediction block of the current block through an intra-prediction; performing in-loop filtering on the current block in which the residual block and the prediction block are combined; and storing the current block, on which the in-loop filtering is performed, in a frame buffer for an intra-prediction of the next block to be encoded. As described above, prediction is performed using an in-loop filter during processes for encoding and decoding video, thereby improving the accuracy of prediction and reducing errors in prediction, thus improving the efficiency of video compression and reducing the amount of data to be transmitted. | 05-21-2015 |
20150146779 | IN-LOOP FILTERING METHOD AND APPARATUS USING SAME - A video decoding method for depth information in accordance with an embodiment of the present invention includes generating a prediction block of a current block for the depth information, generating a restored block of the current block based on the prediction block, and performing filtering on the restored block, whether or not to perform the filtering can be determined based on block information about the current block and coding information about the current block. | 05-28-2015 |
20150146780 | VIDEO ENCODER AND VIDEO ENCODING METHOD - The video encoder includes: a refresh boundary determination unit which determines a position of a boundary in a second picture to be encoded based on a position of a boundary between a refreshed region and an unrefreshed region in a first picture which have been encoded and a refresh update size; and a restriction block identification unit which identifies, as a first restriction target sub-block which does not utilize a prediction vector, a first sub-block being a unit of motion compensation which is included in a refreshed region of the second picture and is possible to select a motion vector of a sub-block in the unrefreshed region of the first picture as a prediction vector of the motion vector, based on the positions of the boundaries of the first and the second pictures. | 05-28-2015 |
20150146781 | METHOD AND APPARATUS FOR INTRA PREDICTION WITHIN DISPLAY SCREEN - The present invention relates to a method and apparatus for intra prediction. The intra prediction method for a decoder, according to the present invention, comprises the steps of entropy-decoding a received bitstream, generating reference pixels to be used in the intra prediction of a prediction unit; generating a prediction block from the reference pixels on the basis of a prediction mode for the prediction unit and reconstructing an image from the prediction block and a residual block, which is obtained as a result of entropy encoding, wherein the reference pixels and/or the prediction block pixels are predicted on the basis of a base pixel, and the predicted pixel value can be the sum of the pixel value of the base pixel and the difference between the pixel values of the base pixel and the generated pixel. | 05-28-2015 |
20150146782 | IN-LOOP FIDELITY ENHANCEMENT FOR VIDEO COMPRESSION - An encoder for receiving a video frame and performing encoding processes to generate an encoded bitstream includes: a fidelity enhancement block, for performing a fidelity enhancement technique on processed data utilizing a partition method, and generating fidelity enhancement information comprising at least one parameter associated with a partition structure, wherein the fidelity enhancement technique comprises applying discrepancy modeling based on DC offset; and an entropy coding block, coupled to the fidelity enhancement block, for encoding the fidelity enhancement information, and embedding the encoded fidelity enhancement information into the encoded bitstream. | 05-28-2015 |
20150296211 | INTER-LAYER TEXTURE CODING WITH ADAPTIVE TRANSFORM AND MULTIPLE INTER-LAYER MOTION CANDIDATES - Methods of adaptive transform type based on transform unit (TU) size for enhancement layer (EL) coding and multiple motion candidates for EL coding based on corresponding base layer (BL) video data are provided. One method selects a transform type from multiple allowable transform types based on the TU size and applies the selected transform type to the transform units of the inter-layer prediction processed data. Another method derives multiple motion candidates for the EL video data coded in Merge mode or Inter mode based on motion information associated with the corresponding BL video data. | 10-15-2015 |
20150296219 | METHOD AND DEVICE FOR GENERATING PREDICTED PICTURES - Disclosed are a method and device for generating a predicted picture, the method comprising: determining a reference rectangular block of pixels according to parameter information which includes a location of a target rectangular block of pixels and/or depth information of a reference view; mapping the reference rectangular block of pixels to a target view according to the depth information of the reference view to obtain a projection rectangular block of pixels; and acquiring a predicted picture block from the projection rectangular block of pixels. The technical problem of relatively large dependence among the data brought by simultaneously employing the depth picture of the target view and the depth picture of the reference view in the process of generating the predicted picture in the prior art is solved, and the technical effects of reducing the dependence on the data and improving the encoding and decoding efficiency is achieved. | 10-15-2015 |
20150296220 | VIDEO ENCODING AND DECODING METHOD USING AN INTRA PREDICTION - A method performed by an apparatus for intra-predicting a current block in the unit of subblocks, comprises: determining an intra prediction mode of the current block among a plurality of intra prediction modes; identifying the subblocks split from the current block; and sequentially reconstructing the identified subblocks using an intra prediction mode identical to the determined intra prediction mode of the current block, wherein a subblock to be reconstructed is predicted using at least one pre-reconstructed neighboring subblock in the current block. | 10-15-2015 |
20150296221 | ENCODING OR DECODING METHOD AND APPARATUS - Embodiments of the present invention provide an encoding or decoding method and apparatus. The method includes: extracting first information in a bitstream; determining a chroma component intra prediction mode according to the first information; when the chroma component intra prediction mode cannot be determined according to the first information, extracting second information in the bitstream; and determining the chroma component intra prediction mode according to the second information, where the first information includes information for indicating whether the chroma component intra prediction mode is a DM mode or an LM mode, the second information is used to indicate a remaining mode as the chroma component intra prediction mode, and the remaining mode is one of available chroma component intra prediction modes other than a mode that may be determined according to the first information. | 10-15-2015 |
20150296223 | APPARATUS AND METHOD FOR ENCODING AND DECODING MOVING PICTURE USING ADAPTIVE SCANNING - Provided is an apparatus and method for encoding/decoding a moving picture based on adaptive scanning. The moving picture apparatus and method can increase a compression rate based on adaptive scanning by performing intra prediction onto blocks of a predetermined size, and scanning coefficients acquired from Discrete Cosine Transform (DCT) of a residue signal and quantization differently according to the intra prediction mode. The moving picture encoding apparatus includes: a mode selector for selecting and outputting a prediction mode; a predictor for predicting pixel values of pixels to be encoded of an input video based on the prediction mode to thereby output a residue signal block; a transform/quantization unit for performing DCT onto the residue signal block and quantizing the transformed residue signal block; and an encoder for adaptively scanning and encoding the quantized residue signal block based on the prediction mode. | 10-15-2015 |
20150304669 | TECHNIQUES FOR DESCRIBING TEMPORAL CODING STRUCTURE - The disclosed subject matter describes a new pattern description that can be part of an SEI message or a parameter set, and can be used to describe a temporal picture coding structure and associated bitrates and frame rates. The knowledge of the coding structure can benefit transraters, bitstream extractors, and digital video recorders. Decoders can utilize the coding structure information for example, to decode pictures in parallel, using multiple threads/cores. | 10-22-2015 |
20150304671 | DEVICE FOR SIGNALING A LONG-TERM REFERENCE PICTURE IN A PARAMETER SET - A method for sending a long-term reference picture indicator by an electronic device is described. A long-term reference picture indicator is generated. The long-term reference picture indicator is sent. An absolute Picture Order Count (POC) corresponding to a long-term reference picture is generated. The absolute POC includes a least significant bit (LSB) value. The LSB value of the absolute POC corresponding to a long-term reference picture is sent. A used by current picture flag corresponding to a current picture is generated. The used by current picture flag in at least one parameter set is sent. | 10-22-2015 |
20150304672 | IMAGE PROCESSING DEVICE AND METHOD - The present disclosure relates to image processing devices and methods image processing devices and methods that can reduce noise that is recognized in synchronization with an intraframe appearance cycle. | 10-22-2015 |
20150304675 | SYSTEM AND METHOD FOR CODING IN BLOCK PREDICTION MODE FOR DISPLAY STREAM COMPRESSION (DSC) - A system and method for coding a block of video data in block prediction mode for display stream compression (DSC) is disclosed. In one aspect, the method includes determining a candidate block to be used for predicting a current block in a current slice. The candidate block may be within a range of locations defined by one or more block prediction parameters. The method further includes determining, based on the candidate block and the current block, a prediction vector identifying a location of the candidate block with respect to the current block, and coding the current block in block prediction mode at least in part via signaling the prediction vector identifying the location of the candidate block with respect to the current block. | 10-22-2015 |
20150304683 | INTRAFRAME CODING METHOD, DEVICE AND ENCODER FOR DEPTH IMAGES - The embodiments of the present invention provide an intraframe encoding method, device and encoder for depth images. The method is applied to 3D video encoding or multi-view video encoding. The method includes: in an intraframe encoding mode for depth images, generating a non-all-zero residual and an all-zero residual when a prediction unit is encoded; and performing a rate-distortion optimization selection between the non-all-zero residual and the all-zero residual, as a residual encoding scheme of the prediction unit. The device is applied to 3D video encoding or multi-view video encoding. The device includes: a residual generation unit configured to generate, in an intraframe encoding mode for depth images, a non-all-zero residual and an all-zero residual when a prediction unit is encoded; and a rate-distortion optimization selection unit configured to perform a rate-distortion optimization selection between the non-all-zero residual and the all-zero residual, as a residual encoding scheme of the prediction unit. | 10-22-2015 |
20150312583 | METHOD AND APPARATUS FOR REDUCING REDUNDANCY IN RESIDUE SIGNEL IN VIDEO DATA COMPRESSION - A method of processing video data includes generating a prediction signal (PS) corresponding to a Macro Block (MB), calculating a prediction residue signal (PRS) of the MB from the prediction signal (PS), predicting a reconstructed prediction residual signal (RPRS) from a reconstructed residue reference frame (RRRF), and identifying an error of residue signal (EORS) by subtracting the RPRS from the PRS. The method further includes comparing the PRS of the MB and the EORS, identifying a residue signal having a least error value based on a result of the comparison, and generating an encoded bit stream for transmission based on the residue signal having the least error value. The residue signal is identified by correlating the prediction residue signal of the MB and the RPRS of a reference frame. | 10-29-2015 |
20150312590 | METHODS FOR ENCODING AND DECODING A PICTURE AND CORRESPONDING DEVICES - A method for decoding a picture divided into blocks is disclosed. The method comprises at least one iteration of: | 10-29-2015 |
20150319444 | VIDEO COMPRESSION DEVICE, VIDEO DECODING DEVICE, IMAGE COMPRESSION DEVICE, IMAGE DECODING DEVICE, IMAGING DEVICE, AND PROGRAM - A moving image compression device has an obtaining unit, an image conversion unit, and a compression processing unit. The obtaining unit obtains a RAW moving image having plural frames associated in an order of imaging, the frames having pixels of three different color components which are disposed periodically according to a color array with two rows and two columns. The image conversion unit separates, in a target frame, a first pixel group corresponding to a first color component of odd rows and a second pixel group corresponding to the first color component of even rows, and alternately arrays, in a time base direction, a first image including the first pixel group and a second image including the second pixel group. The compression processing unit performs inter-frame prediction coding compression on the first image and the second image. | 11-05-2015 |
20150319447 | Reference Layer and Scaled Reference Layer Offsets for Scalable Video Coding - A process for determining the selection of filters and input samples is provided for scalable video coding. The process provides for re-sampling using video data obtained from an encoder or decoder process of a base layer (BL) in a multi-layer system to improve quality in Scalable High Efficiency Video Coding (SHVC). It is proposed that a single scaled reference layer offset be derived from two scaled reference layer offset parameters, and vice-versa. It is also proposed that a single scaled reference layer offset or a single reference layer offset be derived from a combination of a scaled reference layer offset parameter and a reference layer offset parameter. | 11-05-2015 |
20150319451 | METHOD OF CODING AND DECODING IMAGES, DEVICE FOR CODING AND DECODING COMPUTER PROGRAMS CORRESPONDING THERETO - A method of coding an image comprising the steps of partitioning (C | 11-05-2015 |
20150319452 | Method and System to Combine Multiple Encoded Videos - Methods and systems described herein provide for combining multiple data streams representing respective videos into an output data stream. An example implementation may involve receiving a first data stream that represent a first video and a second data stream that represent a second video. The first data stream and the second data stream may include a first sequence of frames that includes first intra-coded frames and a second sequence of frames that includes second intra-coded frames, respectively. The example implementation may further involve combining the received first data stream and the received second data stream to obtain an output data stream of encoded output frames such that an encoded output frame includes a respective frame of the first sequence and a respective frame of the second sequence and that first intra-coded frames are combined with respective second intra-coded frames in respective encoded output frames within the output stream. | 11-05-2015 |
20150319453 | METHOD FOR ENCODING/DECODING IMAGES, AND APPARATUS USING SAME - According to the present invention, an image decoding method for supporting a plurality of layers includes the steps of: receiving and parsing layer-dependent information for reference layers that can be referenced by a current layer in an entire bitstream; when interlayer prediction is used in decoding a current picture in the current layer, receiving and parsing layer information for a reference layer referenced by the current picture among the reference layers; and decoding the current picture on the basis of the layer information. | 11-05-2015 |
20150319456 | Method and device for encoding a sub-aperture image of a set of sub-aperture images obtained from a plenoptic image - The invention relates to a method for encoding a plenoptic image comprising a plurality of microlens images, each microlens image formed by an associated microlens, the plenoptic image being associated with acquisition parameters of a plenoptic acquisition system with which the plenoptic image has been obtained, the method comprising decomposing the plenoptic image into a plurality of sub-aperture images, and encoding said plurality of sub-aperture images using one or more encoding parameters, which one or more encoding parameters are determined in dependence upon the acquisition parameters associated with the plenoptic image. | 11-05-2015 |
20150319457 | DECODING AND ENCODING OF PICTURES OF A VIDEO SEQUENCE - The embodiments reduce output delay for pictures by determining after a current picture has been decoded and stored in a decoded picture buffer, DPB, a number of pictures in the DPB that are marked as needed for output. This number is compared, after a current picture has been decoded and stored in the DPB, against a value derived form at least one syntax element present or to be present in a bitstream representing pictures of a video sequence. If this number is greater than the value a picture, which is the first picture in output order, of the pictures in the DPB that are marked as needed for output is preferably output and marked as not needed for output. | 11-05-2015 |
20150319459 | METHODS AND APPARATUSES FOR CODING AND DECODING DEPTH MAP - Embodiments of the present invention provide methods and apparatuses for coding and decoding a depth map, where the coding method includes: acquiring an intra-frame prediction mode of a current image block of the depth map; determining whether the intra-frame prediction mode belongs to a preset intra-frame prediction mode set; if yes, using a preset intra-frame prediction method to perform coding processing on the current image block, so as to acquire a residual of the current image block. The preset intra-frame prediction method includes a first intra-frame prediction method; and a difference operation is performed between an average pixel value of the current image block and an average pixel value of prediction data of the current image block to obtain the residual of the current image block. | 11-05-2015 |
20150319460 | IMAGE PROCESSING DEVICE AND METHOD - The present disclosure relates to an image processing device and an image processing method capable of improving the coding efficiency in multi-viewpoint coding. In the case of present technology | 11-05-2015 |
20150319461 | ENCODING DEVICE AND ENCODING METHOD, AND DECODING DEVICE AND DECODING METHOD - The present technology relates to an encoding device, an encoding method, a decoding device, and a decoding method capable of improving the coding efficiency of an image of a plurality of viewpoints. A motion parallax prediction/compensation unit sets first image specifying information specifying a first image of a viewpoint present in a first direction from a viewpoint of a current coding image and second image specifying information specifying a second image of a viewpoint present in a second direction opposite to the first direction in a list (L | 11-05-2015 |
20150319463 | IMAGE CODING DEVICE, IMAGE DECODING DEVICE, IMAGE CODING METHOD, AND IMAGE DECODING METHOD - When removing a block distortion occurring in a local decoded image, a loop filtering part | 11-05-2015 |
20150326855 | FIELD/FRAME ADAPTIVE DECODING WITH FIELD/FRAME INDEX - A moving picture coding method for coding a picture with switching between frame coding and field coding adaptively on a block-by-block basis includes: determining the maximum number of reference indices for field coding for specifying fields which are to be referred to at the time of field coding, using the maximum number of reference indices for frame coding for specifying frames which are to be referred to at the time of frame coding; and assigning to fields the reference indices for field coding for specifying fields which are to be referred to at the time of field coding, within a range of the determined maximum number thereof, using the reference indices for frame coding for specifying frames which are to be referred to at the time of frame coding. | 11-12-2015 |
20150326856 | FIELD/FRAME ADAPTIVE DECODING WITH FIELD/FRAME INDEX - A moving picture coding method for coding a picture with switching between frame coding and field coding adaptively on a block-by-block basis includes: determining the maximum number of reference indices for field coding for specifying fields which are to be referred to at the time of field coding, using the maximum number of reference indices for frame coding for specifying frames which are to be referred to at the time of frame coding; and assigning to fields the reference indices for field coding for specifying fields which are to be referred to at the time of field coding, within a range of the determined maximum number thereof, using the reference indices for frame coding for specifying frames which are to be referred to at the time of frame coding. | 11-12-2015 |
20150326873 | IMAGE FRAMES MULTIPLEXING METHOD AND SYSTEM - Embodiments of the present disclosure are directed towards a method of encoding image frames into a multiplexed frame, and a corresponding method of decoding the multiplexed frame. The encoding method includes modifying image frames to generate corresponding processed frames, and generating masking data that indicates how an output frame can be produced from one of the processed frames and another of the processed frames. The processed frames and the masking data can be combined to form a multiplexed frame. The decoding method includes receiving a multiplexed frame containing processed frames and masking data, and unpacking the multiplexed frame to identify the processed frames and the masking data. Once unpacked, an output frame can be generated from the processed frames by combining one of the processed frames with another of the processed frames according to the masking data. | 11-12-2015 |
20150326874 | APPARATUS AND METHOD FOR CODING A VIDEO SIGNAL - An apparatus and method are provided for coding a video signal, wherein each picture frame of the video signal comprises one or more corresponding reference frames, each reference frame R comprising a first field (for example a top field or a bottom field) and a second field (for example a bottom field or top field). A current frame to be coded is received, and a first field or a second field of a reference frame selected for coding a first field of the current frame. The selecting is performed based on the video content of the reference frame. The first field of the current frame is coded using the selected field of the reference frame. | 11-12-2015 |
20150326877 | EFFICIENT ROUNDING FOR DEBLOCKING - The present disclosure relates to deblocking filtering which is applicable to smoothing the block boundaries in an image or video coding and decoding. In particular, the deblocking filtering is either strong or weak, wherein the clipping is performed differently in the strong filtering and the weak filtering. | 11-12-2015 |
20150326879 | IMAGE ENCODING METHOD AND DEVICE, AND DECODING METHOD AND DEVICE THEREFOR - A video encoding method and apparatus and a video decoding method and apparatus. In the video encoding method, a first predicted coding unit of a current coding unit that is to be encoded is produced, a second predicted coding unit is produced by changing a value of each pixel of the first predicted coding unit by using each pixel of the first predicted coding unit and at least one neighboring pixel of each pixel, and the difference between the current coding unit and the second predicted coding unit is encoded, thereby improving video prediction efficiency. | 11-12-2015 |
20150326881 | IMAGE DECODING DEVICE - An image decoding device includes an illumination compensation flag derivation section that derives an illumination compensation flag indicating whether illumination compensation is executed and an illumination compensation section ( | 11-12-2015 |
20150326882 | Coding and Decoding of Interleaved Image Data - Sampled data is packaged in checkerboard format for encoding and decoding. The sampled data may be quincunx sampled multi-image video data (e.g., 3D video or a multi-program stream), and the data may also be divided into sub-images of each image which are then multiplexed, or interleaved, in frames of a video stream to be encoded and then decoded using a standardized video encoder. A system for viewing may utilize a standard video decoder and a formatting device that de-interleaves the decoded sub-images of each frame reformats the images for a display device. A 3D video may be encoded using a most advantageous interleaving format such that a preferred quality and compression ratio is reached. In one embodiment, the invention includes a display device that accepts data in multiple formats. | 11-12-2015 |
20150334391 | REGION-BASED PROCESSING OF PREDICTED PIXELS - A method for decoding a compressed video data sequence containing one or more coded pixel blocks. The compressed video sequence is buffered. Prediction information for each of the coded pixel blocks is reviewed. One or more groups of coded pixel blocks are formed based on the reviewed prediction information such that the coded pixel blocks within a given group have similar prediction dependencies and/or at least do not depend on a reconstructed pixel within a group of received pixel blocks to enable parallel decoding. The formed groups are scheduled for processing and subsequently decoded to produce a decoded video data sequence. | 11-19-2015 |
20150334392 | IMAGE PROCESSING DEVICE AND IMAGE PROCESSING METHOD - Provided is an image processing apparatus including a prediction section that generates a predicted value of a color difference component of a pixel of an image to be decoded by using a function of a value of a corresponding luminance component, a coefficient calculation section that calculates a coefficient of the function used by the prediction section by referencing a pixel around a block to which the pixel belongs, and a controller that controls a ratio of a number of reference pixels used by the coefficient calculation section to a block size of the block. | 11-19-2015 |
20150334399 | METHOD FOR ENCODING VIDEO, METHOD FOR DECODING VIDEO, AND APPARATUS USING SAME - The present invention relates to a method for coding a scalable video in a multilayer structure, and a method for encoding a video according to the present invention comprises the steps of: decoding and saving a picture of a reference layer; inducing an interlayer reference picture which is referenced for predicting a current block of a current layer; producing a reference picture list including the interlayer reference picture and a reference picture of the current layer; conducting a prediction on the current block of the current layer with the reference picture list to induce a prediction sample with respect to the current block; inducing a recovery sample with respect to the current block based on the prediction sample and the prediction block with respect to the current block; and transmitting reference information for indicating a picture that can be used for interlayer prediction from the pictures of the reference layer. | 11-19-2015 |
20150334407 | ENCODING AND DERIVING PARAMETERS FOR CODED MULTI-LAYER VIDEO SEQUENCES - A method of deriving parameters required for decoding a current layer of a coded multi-layer video sequence. The method comprises deriving a required parameter from one or more parameters associated with the current or a lower layer of the multiple layers. The invention makes use of an understanding that parameters which are required for decoding a current higher layer of a multi-layer video representation may be derived, i.e., inferred or predicted, from parameters associated with lower layers rather than explicitly signaled in a parameter set associated with the current layer. Also disclosed are a method of encoding parameters associated with such a current layer, corresponding computer program products, a corresponding parameter set decoder, and a corresponding parameter set encoder. | 11-19-2015 |
20150334417 | Coding a Sequence of Digital Images - A method is provided for coding a sequence of digital images, wherein the method uses a number of prediction modes for predicting values of pixels in the images based on reconstructed values of pixels in image areas processed previously, where a prediction error between predicted values and the original values of pixels is processed for generating the coded sequence of digital images. | 11-19-2015 |
20150334419 | METHOD AND APPARATUS FOR PROCESSING A VIDEO SIGNAL - The present invention relates to a video signal decoding method for adding an intra prediction mode as a sub-macroblock type to prediction of a macroblock in coding a video signal. Some implementations may include obtaining a macroblock type, when a macroblock includes the intra prediction coded sub-macroblock and the inter prediction coded sub-macroblock based on the macroblock type, obtaining prediction mode flag information indicating whether the sub-macroblock is the intra prediction coded or the inter prediction coded, and obtaining a prediction value of the sub-macroblock. Accordingly, implementations disclosed herein may raise coding efficiency of video signal by adding an intra prediction mode as a sub-macroblock type in predicting a macroblock. | 11-19-2015 |
20150341637 | METHOD AND APPARATUS FOR ENCODING/DECODING VIDEO USING SPLIT LAYER - A method performed by an apparatus of decoding a video in the unit of blocks, includes: extracting and decoding a first information corresponding to a minimum block size and a second information corresponding to a difference between the minimum block size and a maximum block size, from a bitstream; calculating the maximum block size based on the first information corresponding to the minimum block size and the second information corresponding to the difference; decoding, from the bitstream, partition information of a square current block having the derived maximum block size to identify one or more subblocks in the current block which have sizes equal to or larger than the minimum block size; decoding a prediction mode information of each of the subblocks, the prediction mode information indicating whether a subblock is inter-predicted or intra-predicted; and reconstructing each of the subblocks in the current block by predicting each of the subblocks. | 11-26-2015 |
20150341638 | METHOD AND DEVICE FOR PROCESSING PREDICTION INFORMATION FOR ENCODING OR DECODING AN IMAGE - A method of providing a mode value representing a prediction mode of at least part of an image to be encoded, the image being composed of a plurality of processing blocks, each processing block being predictable by applying a prediction mode of a plurality M of available prediction modes, the method comprising: | 11-26-2015 |
20150341649 | Signaling and Selection for the Enhancement of Layers in Scalable Video - A method is provided for signaling individual layer parameters in a transport stream that includes: indicating, using a supplemental enhancement information (SEI) message in the video stream, operation point information; inserting the operation point information in the transport stream using an operation point descriptor; and providing the operation point descriptor in a Program Map Table (PMT). | 11-26-2015 |
20150341650 | VIDEO ENCODING METHOD, VIDEO DECODING METHOD, AND DEVICE USING SAME - The present invention relates to a video encoding method, a video decoding method, and a device using the same, and the video encoding method according to the present invention comprises the steps of: specifying a tile and a slice by partitioning an inputted picture; performing encoding on the basis of the tile and the slice; and transmitting the encoded video information, wherein the picture is partitioned into one or more tiles and one or more slices, and the restrictions for parallel processing can be applied to the tiles and the slices. | 11-26-2015 |
20150341654 | VIDEO CODING SYSTEM WITH EFFICIENT PROCESSING OF ZOOMING TRANSITIONS IN VIDEO - A video coder, responsive to detection of a zooming transition in source video, estimates a scale factor and a zooming rectangle for a reference frame, scales content of the reference frame within the zooming rectangle according to the scaling factor, codes content of a new frame of the source video predictively using the scaled reference frame as a basis of prediction, and transmits coded video data obtained from the predictive coding to a decoder along with an indication of the scaling factor and zooming rectangle. | 11-26-2015 |
20150341656 | PREDICTOR PALETTE INITIALIZATION IN PALETTE-BASED VIDEO CODING - In an example a method of processing video data includes determining a first palette for a first block of video data that is located in a first row of blocks, generating a predictor palette for constructing at least one second palette of at least one second block of video data in the first row of blocks coded, reinitializing the predictor palette for determining a third palette of a third block of video data that is located in a second row of blocks, wherein re-initializing the predictor palette comprises re-initializing the predictor palette based on the one or more palette entries of the first palette or an initial predictor palette generated after coding the first block, determining the third palette of the third block based on the re-initialized predictor palette, and coding the third block using the third palette. | 11-26-2015 |
20150341661 | SCALABLE VIDEO ENCODING METHOD AND APPARATUS USING IMAGE UP-SAMPLING IN CONSIDERATION OF PHASE-SHIFT AND SCALABLE VIDEO DECODING METHOD AND APPARATUS - Provided is a method of determining an up-sampling filter to accurately interpolate a sample value for each sampling position according to an up-sampling ratio for scalable video encoding and decoding. An up-sampling method for scalable video encoding includes determining a phase shift between a pixel of a low resolution image and a pixel of a high resolution image based on a scaling factor between the high resolution image and the low resolution image; selecting at least one filter coefficient set corresponding to the determined phase shift from filter coefficient data comprising filter coefficient sets corresponding to phase shifts; generating the high resolution image by performing filtering on the low resolution image by using the selected at least one filter coefficient set; and generating an improvement layer bitstream comprising high resolution encoding information generated by performing encoding on the high resolution image and up-sampling filter information indicating the determined phase shift. | 11-26-2015 |
20150341662 | IMAGE CODING APPARATUS, IMAGE CODING METHOD, AND IMAGE CODING SYSTEM - Prediction directions for cost calculation are reduced by preferentially selecting a direction in which a prediction pixel is generated by direct copy without filtering from among intra prediction directions to perform intra prediction. In addition to the roughly selected prediction direction, an amount of processing is reduced while deterioration of coding efficiency is prevented through comparison with preferentially selected prediction, such as DC prediction and planar prediction, and selection of second-stage prediction direction focused on a vicinity of roughly selected prediction direction. | 11-26-2015 |
20150341664 | METHOD AND APPARATUS OF DISPARITY VECTOR DERIVATION IN THREE-DIMENSIONAL VIDEO CODING - A derived disparity vector is determined based on spatial neighboring blocks and temporal neighboring blocks of the current block. The temporal neighboring blocks are searched according to a temporal search order and the temporal search order is the same for all dependent views. Any temporal neighboring block from a CTU below the current CTU row may be omitted in the temporal search order. The derived DV can also be used for predicting a DV of a DCP (disparity-compensated prediction) block for the current block in the AMVP mode, the Skip mode or the Merge mode. The temporal neighboring blocks may correspond to a temporal CT block and a temporal BR block. In one embodiment, the temporal search order checks the temporal BR block first and the temporal CT block next. | 11-26-2015 |
20150341665 | TILING IN VIDEO ENCODING AND DECODING - Implementations are provided that relate, for example, to view tiling in video encoding and decoding. A particular method includes accessing a video picture that includes multiple pictures combined into a single picture ( | 11-26-2015 |
20150341668 | METHOD FOR ENTROPY-ENCODING SLICE SEGMENT AND APPARATUS THEREFOR, AND METHOD FOR ENTROPY-DECODING SLICE SEGMENT AND APPARATUS THEREFOR - Provided are entropy encoding and entropy decoding for video encoding and decoding. | 11-26-2015 |
20150341669 | METHOD FOR ENTROPY-ENCODING SLICE SEGMENT AND APPARATUS THEREFOR, AND METHOD FOR ENTROPY-DECODING SLICE SEGMENT AND APPARATUS THEREFOR - Provided are entropy encoding and entropy decoding for video encoding and decoding. The video entropy decoding method includes: determining a bin string and a bin index for a maximum coding unit that is obtained from a bitstream; determining a value of a syntax element by comparing the determined bin string with bin strings that is assignable to the syntax element in the bin index; storing context variables for the maximum coding unit when the syntax element is a last syntax element in the maximum coding unit, a dependent slice segment is includable in a picture in which the maximum coding unit is included, and the maximum coding unit is a last maximum coding unit in a slice segment; and restoring symbols of the maximum coding unit by using the determined value of the syntax element. | 11-26-2015 |
20150341670 | METHOD FOR ENTROPY-ENCODING SLICE SEGMENT AND APPARATUS THEREFOR, AND METHOD FOR ENTROPY-DECODING SLICE SEGMENT AND APPARATUS THEREFOR - Provided are entropy encoding and entropy decoding for video encoding and decoding. The video entropy decoding method includes: determining a bin string and a bin index for a maximum coding unit that is obtained from a bitstream; determining a value of a syntax element by comparing the determined bin string with bin strings that is assignable to the syntax element in the bin index; storing context variables for the maximum coding unit when the syntax element is a last syntax element in the maximum coding unit, a dependent slice segment is includable in a picture in which the maximum coding unit is included, and the maximum coding unit is a last maximum coding unit in a slice segment; and restoring symbols of the maximum coding unit by using the determined value of the syntax element. | 11-26-2015 |
20150341671 | METHOD FOR ENTROPY-ENCODING SLICE SEGMENT AND APPARATUS THEREFOR, AND METHOD FOR ENTROPY-DECODING SLICE SEGMENT AND APPARATUS THEREFOR - Provided are entropy encoding and entropy decoding for video encoding and decoding. The video entropy decoding method includes: determining a bin string and a bin index for a maximum coding unit that is obtained from a bitstream; determining a value of a syntax element by comparing the determined bin string with bin strings that is assignable to the syntax element in the bin index; storing context variables for the maximum coding unit when the syntax element is a last syntax element in the maximum coding unit, a dependent slice segment is includable in a picture in which the maximum coding unit is included, and the maximum coding unit is a last maximum coding unit in a slice segment; and restoring symbols of the maximum coding unit by using the determined value of the syntax element. | 11-26-2015 |
20150341672 | METHOD FOR ENTROPY-ENCODING SLICE SEGMENT AND APPARATUS THEREFOR, AND METHOD FOR ENTROPY-DECODING SLICE SEGMENT AND APPARATUS THEREFOR - Provided are entropy encoding and entropy decoding for video encoding and decoding. The video entropy decoding method includes: determining a bin string and a bin index for a maximum coding unit that is obtained from a bitstream; determining a value of a syntax element by comparing the determined bin string with bin strings that is assignable to the syntax element in the bin index; storing context variables for the maximum coding unit when the syntax element is a last syntax element in the maximum coding unit, a dependent slice segment is includable in a picture in which the maximum coding unit is included, and the maximum coding unit is a last maximum coding unit in a slice segment; and restoring symbols of the maximum coding unit by using the determined value of the syntax element. | 11-26-2015 |
20150341673 | CODING RUNS IN PALETTE-BASED VIDEO CODING - In an example, a method of coding video data includes determining, for a pixel associated with a palette index that relates a value of the pixel to a color value in a palette of colors used for coding the pixel, a run length of a run of palette indices being coded with the palette index of the pixel, the method also includes determining a maximum run length for a maximum run of palette indices able to be coded with the palette index of the pixel, and coding data that indicates the run length based on the determined maximum run length. | 11-26-2015 |
20150341674 | CODING RUNS WITH ESCAPE IN PALETTE-BASED VIDEO CODING - In an example a method of processing video data includes determining palette indices of a first row of a block of video data, wherein the palette indices correspond to a palette of one or more colors for coding the block of video data, and wherein the palette indices of the first row include one or more indices that are associated with a color value in the palette and a syntax element that is not associated with a color value in the palette. The method also includes coding a run of palette indices of a second row of the block of video data relative to the palette indices of the first row, wherein the run includes the one or more indices that are associated with a color value in the palette and the syntax element that is not associated with a color value in the palette. | 11-26-2015 |
20150350623 | Method and Apparatus for Efficient Coding of Depth Lookup Table - A method and apparatus for encoding and decoding depth lookup table (DLT) using a constrained table value range are disclosed. For a decoder, a constrained table value range from a minimum table value to a maximum table value of the DLT is decoded from the coded DLT information. Bit map values for depth values in a depth range from (the minimum table value+1) to (the maximum table value−1) are then decoded. The bit map values indicate whether the depth values are in the DLT respectively. The DLT for the current depth map can be reconstructed based on the constrained table value range and the bit map values for the depth values in the depth range. For an encoder, a constrained table value range from a minimum table value to a maximum table value of the DLT is determined and encoded the DLT into coded DLT information. | 12-03-2015 |
20150350640 | VIDEO ENCODING AND DECODING METHOD - Disclosed are a method and apparatus for improving the accuracy of intra-prediction in order to improve encoding and decoding efficiency. The video decoding method may improve the prediction efficiency for the current pixel to be predicted by referring to the degree of variation in surrounding pixels, to thereby effectively decode the bit stream with improved encoding efficiency. In addition, an additional prediction candidate is used to achieve improved accuracy of intra-prediction, and the thus-improved accuracy of intra-prediction may reduce residual components and improve encoding efficiency. Further, an improved planar mode is utilized to achieve improved intra-prediction. | 12-03-2015 |
20150350642 | METHOD FOR ENCODING INTER-LAYER VIDEO FOR COMPENSATING LUMINANCE DIFFERENCE AND DEVICE THEREFOR, AND METHOD FOR DECODING VIDEO AND DEVICE THEREFOR - Provided are an inter-layer video encoding method and apparatus therefor and an inter-layer video decoding method and apparatus therefor. An inter-layer video decoding method involves reconstructing a first layer image, based on encoding information obtained from a first layer bitstream; in order to reconstruct a second layer block determined as a predetermined partition type and to be in a prediction mode, determining whether to perform illumination compensation for the reconstructed second layer block determined by using a first layer reference block that is from among the reconstructed first layer image and corresponds to the second layer block; and generating the reconstructed second layer block by using inter-layer prediction information obtained from a second layer bitstream and the first layer reference block, and generating a second layer image including the reconstructed second layer block whose illumination is determined according to whether the illumination compensation was performed. | 12-03-2015 |
20150350643 | METHOD AND APPARATUS FOR GENERATING A REFERENCE FRAME AND METHOD AND APPARATUS FOR ENCODING/DECODING IMAGE USING THE SAME - A method for encoding pixels in an image, includes: encoding an offset to be applied to a reference frame; generating predicted pixels of the pixels in the image, based on interpolating pixels in the reference frame and then adding the offset to the interpolated pixels; and encoding residual signals that are differences between the pixels in the image and the predicted pixels, wherein the encoding of the residual signals comprises: skipping both transform and quantization with respect to residual signals of which an encoding scheme corresponds to skipping of both transform and quantization, the encoding scheme related to transform and quantization, skipping transform and performing quantization with respect to residual signals of which the encoding scheme corresponds to skipping of transform, and performing transform and quantization with respect to residual signals of which the encoding scheme corresponds to skipping neither transform nor quantization. | 12-03-2015 |
20150350644 | MOVING IMAGE PREDICTION ENCODING/DECODING SYSTEM - A moving image encoding/decoding system may include a video predictive encoding device, which may include: an encoding device which encodes each of a plurality of input pictures to generate compressed picture data including a random access picture, and encodes data about display order information of each picture; a restoration device which decodes the compressed picture data to restore a reproduced picture; a picture storage device which stores the reproduced picture as a reference picture; and a memory management device which controls the picture storage device. Following completion of an encoding process of generating the random access picture, the memory management device refreshes the picture storage device by setting every reference picture in the picture storage device, except for the random access picture, as unnecessary immediately before or immediately after encoding a picture with display order information larger than the display order information of the random access picture. | 12-03-2015 |
20150350651 | MOVING PICTURE CODING METHOD, MOVING PICTURE DECODING METHOD, AND APPARATUSES OF THE SAME - A moving picture coding method includes partitioning a picture into blocks each of which includes pixels, selecting a scanning scheme from among plural scanning schemes, scanning the blocks according to the selected scanning scheme, and coding the blocks in an order in which the blocks are scanned. In the partitioning, the picture is partitioned into rows and columns of macroblocks each of which is partitioned into the blocks. The plural scanning schemes include a first scanning scheme for scanning the blocks in the marcroblock per row of blocks. | 12-03-2015 |
20150350655 | IMAGE COMPRESSION SYSTEM FOR DYNAMICALLY ADJUSTING COMPRESSION PARAMETERS BY CONTENT SENSITIVE DETECTION IN VIDEO SIGNAL - An image compression system includes a register, a sensitive detection device, a prediction difference device, a bit-rate control device, a mapping device, and an encoding device, The register temporarily stores plural pixels, which have a current encoding pixel and plural historical decoded pixels. The sensitive detection device analyzes contents of the historical decoded pixels or a previous history data to calculate a prediction value and a current history data. The prediction difference device subtracts the prediction value from the current encoding pixel to generate a prediction difference value. The bit-rate control device adjusts a compression ratio according to a final bits signal so as to output a suggestion bits signal. The mapping device outputs an index based on the prediction difference value, the current history data, and the suggestion bits signal. The encoding device encodes the index to output a bit stream and the final bits signal. | 12-03-2015 |
20150350657 | VIDEO SIGNAL PROCESSING METHOD AND DEVICE - The video signal processing method according to the present invention comprises: generating a candidate mode list of a current block on the basis of an intra-prediction mode from the spatial neighboring block of the current block; modifying the candidate mode list on the basis of an intra-prediction mode from the neighboring view of the current block; inducing the intra-prediction mode of the current block on the basis of the modified candidate mode list; and predicting the current block by using the induced intra-prediction mode. | 12-03-2015 |
20150350660 | METHOD AND APPARATUS FOR CODING MULTILAYER VIDEO, METHOD AND APPARATUS FOR DECODING MULTILAYER VIDEO - Disclosed are methods for coding and decoding a multilayer video. The method for decoding a multilayer comprise: decoding a first layer picture and saving same to a decoded picture buffer (DPB); marking the first layer picture as a short-term reference picture; obtaining interlayer RPS information of a second layer picture which has a first POC identical to that of the first layer picture and which is interlayer-predicted by referencing the first layer picture; marking the first layer picture which has been marked as the short-term reference picture as a long-term reference picture, based on the interlayer RPS information; and performing interlayer prediction with respect to the second layer picture by referencing the first layer picture which has been marked as the long-term reference picture. | 12-03-2015 |
20150350672 | LOW-RESOLUTION VIDEO CODING CONTENT EXTRACTION - A method for extracting low-resolution video from compressed high-resolution video is disclosed. First, a video, comprising high-resolution frames encoded with a predictive coding technique, is input. At least one of the high-resolution frames is a reference frame. The reference frame is down-sampled to produce a first low-resolution frame with a first DC coefficient. Frequency coefficients corresponding to the first low-resolution frame are generated. Then, a second low-resolution frame is generated according to the frequency coefficients and the first low-resolution frame, the second low-resolution frame having a second DC coefficient. A residual error corresponding to the second low-resolution frame is generated. Finally, a third low-resolution frame is generated according to the frequency coefficients, the first low-resolution frame, and the residual error. A third DC coefficient for the third low-resolution frame is determined according to a weighted average of at least the first DC coefficient and the second DC coefficient. | 12-03-2015 |
20150350673 | VIDEO PROCESSING APPARATUS FOR STORING PARTIAL RECONSTRUCTED PIXEL DATA IN STORAGE DEVICE FOR USE IN INTRA PREDICTION AND RELATED VIDEO PROCESSING METHOD - A video processing apparatus includes a reconstruct circuit, a storage device, and an intra prediction circuit. The reconstruct circuit generates reconstructed pixels of a first block of a picture. The storage device at least stores a portion of the reconstructed pixels of the first block, wherein a capacity of the storage device is smaller than a reconstructed data size of the picture. The intra prediction circuit performs intra prediction of a second block of the picture based at least partly on pixel data obtained from the storage device. | 12-03-2015 |
20150350677 | ENCODING APPARATUS AND DECODING APPARATUS FOR DEPTH IMAGE, AND ENCODING METHOD AND DECODING METHOD - Disclosed are an encoding apparatus and decoding apparatus for a depth image and an encoding method and decoding method. To process a depth image according to an intra prediction mode, the encoding apparatus or the decoding apparatus may use a representative mode from a DC mode of an SDC mode, a planar mode, or DMM | 12-03-2015 |
20150350679 | METHOD AND APPARATUS FOR PROCESSING VIDEO SIGNALS - The present invention relates to a method and an apparatus for processing video signals, and more specifically, to a method and an apparatus for processing video signals which applies deformation compensation to decode a current texture block. The present invention can increase the accuracy of an inter-prediction by obtaining the position of a block within a reference picture referenced by the current texture block, by means of using deformation compensation parameter information, and obtaining a pixel value of the block within the reference picture that is obtained from a prediction value of the current texture block. | 12-03-2015 |
20150350684 | IMAGE PROCESSING APPARATUS AND METHOD - The present disclosure relates to an image processing apparatus and method that enables a reduction in the amount of encoding of a slice header of a non-base view. | 12-03-2015 |
20150350685 | METHOD FOR ENCODING AND DECODING IMAGES BASED ON CONSTRAINED OFFSET COMPENSATION AND LOOP FILTER, AND APPARATUS THEREFOR - Provided are a method and apparatus for encoding and decoding images based on constrained offset compensation and a loop filter. The image decoding apparatus: receives, from an encoder, a first indicator indicating whether a sequence, a picture, a frame, a slice, a coding unit (CU), a prediction unit (PU), and/or a transform unit (TU) supports constrained offset compensation; receives, from the encoder, a second indicator indicating whether constrained sample adaptive offset (SAO) compensation or an adaptive loop filter (ALF) is applied; receives a parameter from the encoder; and applies the SAO compensation or the ALF to pixels of a restored image on the basis of the second indicator and the parameter. | 12-03-2015 |
20150350688 | I-FRAME FLASHING FIX IN VIDEO ENCODING AND DECODING - Methods and systems provide video compression to reduce a “flashing” effect, typically caused by skipping coding or allocating a low number of bits in coding relatively low complexity portions of frames. In an embodiment, if at least a portion of a sequence of frames is of relatively low complexity, a history of coding blocks may be considered to determine whether to skip coding. In an embodiment, a number of coding bits allocated to a block may be increased based on a history of the coding block and a likelihood of flashing. The history of coding of each pixel block may be a basis for forcing a higher quantization parameter coding of pixel block(s) of high motion portions such that a low bit rate is maintained despite a larger number of bits being allocated to flashing-susceptible blocks. In another embodiment, force coding of relatively low complexity portions may be delayed by a number of frames. | 12-03-2015 |
20150358615 | MOVING-PICTURE ENCODING APPARATUS AND MOVING-PICTURE DECODING APPARATUS - According to one embodiment, an encoding apparatus includes a prediction unit, a classifying unit, a first transformer, a second transformer, an order controller, and an entropy coder. The prediction unit obtains a predictive residual signal to be encoded, by using a mode selected from intra-prediction modes. The first transformer obtains first transformation coefficients by subjecting the signal to an orthogonal transformation by use of a first transformation basis if the selected mode is classified into a mode having a prediction direction. The first transformation basis is preset so that a coefficient density after the orthogonal transformation is higher than a coefficient density. | 12-10-2015 |
20150358630 | Combined Parallel and Pipelined Video Encoder - A method of encoding video data including a sequence of digital image frames, in a pipelined processing system is provided. The method includes dividing each frame in the sequence into a plurality of sections, each section including a horizontal band across a frame. The method further includes subdividing each section into a plurality of macroblocks, and encoding a representation of each macroblock in each section to form an output stream. The sections of each frame are processed during adjacent steps in a pipeline of the pipelined processing system. | 12-10-2015 |
20150358634 | Apparatus and Method to Support Encoding and Decoding Video Data - To support encoding a control circuit determines a primary prediction mode to employ when encoding a block of video data and then determines a corresponding companion prediction mode to correspond to the primary prediction mode. The control circuit can then generate a mixed prediction for the block of video data by mixing a prediction formed using the primary prediction mode with a prediction formed using the companion prediction mode. By one approach the control circuit determines the corresponding companion prediction mode by accessing a companion prediction mode lookup table. In such a case, if desired, upon generating the mixed prediction for the block of video data the control circuit can also automatically update the companion prediction mode lookup table. By one approach a corresponding decoder infers the employed companion prediction mode (or modes). | 12-10-2015 |
20150358644 | VIDEO ENCODING APPARATUS AND METHOD, VIDEO DECODING APPARATUS AND METHOD, AND PROGRAMS THEREFOR - A video encoding apparatus divides each frame which forms an encoding target video into a plurality of processing regions, each processing region being subjected to predictive encoding, where a basic reference region associated with each processing region as an encoding target image is set. A first reference prediction region and a second reference prediction region, which are reference regions associated with the basic reference region, are set. Based on a first reference predicted image and a second reference predicted image which correspond to the reference prediction regions, weighting coefficients assigned to individual small regions are set. A first prediction region and a second prediction region, which are reference regions for the encoding target image, are set. A predicted image is generated based on the weighting coefficients, and a first primary-predicted image and a second primary-predicted image which are obtained based on the first and second prediction regions. | 12-10-2015 |
20150365666 | ENHANCED DEBLOCKING FILTERS FOR VIDEO CODING - Deblocking filters used in video coding systems (e.g., single layer video coding systems or multi-layer video coding systems) may be enhanced. Inter layer prediction for scalable video coding (SVC) may be implemented using enhanced deblocking filters. Enhanced deblocking filters may be configured to be adapted, for example by adjusting a deblocking filter boundary strength calculation process. A deblocking filter boundary strength parameter may be assigned in accordance with, for example, a video block partition size of an input video block or a neighboring video block, whether an input video block or a neighboring video block was predicted using an inter layer reference, and/or whether at least one of an input video block or a neighboring video block have one or more corresponding base layer blocks that were coded using intra mode. | 12-17-2015 |
20150365698 | Method and Apparatus for Prediction Value Derivation in Intra Coding - A method and apparatus for sample-based Simplified Depth Coding (SDC) are disclosed. The system determines prediction samples for the current depth block based on reconstructed neighboring depth samples according to a selected Intra mode and determines an offset value for the current depth block. The final reconstructed samples are derived by adding the offset value to each of the prediction samples. The offset value corresponds to a difference between a reconstructed depth value and a predicted depth value for the current depth block. The offset value can be derived from the residual value, and the residual value can be derived implicitly at a decoder side or transmitted in the bitstream. The selected Intra mode may correspond to Planar mode, the prediction samples are derived according to the Planar mode. | 12-17-2015 |
20150365699 | Method and Apparatus for Direct Simplified Depth Coding - A method and apparatus for direct Simplified Depth Coding (dSDC) to derive prediction value directly for each segment without deriving depth prediction samples or depth prediction subsamples. The dSDC method substantially reduces the computations associated with deriving the prediction samples or subsamples and calculating the average of the prediction samples or subsamples by deriving the prediction value directly based on the reconstructed neighboring depth samples. The direct SDC can be applied to derive the two prediction values, P0 and P1 for the two segments of a depth block coded by SDC depth modelling mode 1 (DMM-1). | 12-17-2015 |
20150373343 | REPRESENTATION FORMAT UPDATE IN MULTI-LAYER CODECS - An apparatus for encoding video information according to certain aspects includes a memory and a processor configured to: receive a video parameter set (VPS) including one or more representation format syntax structures, the VPS indicating a first representation format syntax structure associated with a first layer of the plurality of layers; receive a sequence parameter set (SPS) including (1) a reference to a second representation format syntax structure in the VPS or (2) a third representation format syntax structure not included in the VPS, each representation format syntax structure including a first flag indicative of whether to code color components of chroma format of a layer separately; and update a value of a first variable indicative of whether to code color components of chroma format of a layer separately without referring to a value of the first flag in the first representation format syntax structure. | 12-24-2015 |
20150373356 | SIGNALING HRD PARAMETERS FOR BITSTREAM PARTITIONS - In one example, a device for coding (e.g., encoding or decoding) video data includes a memory configured to store video data, and a video coder configured to code hypothetical reference decoder (HRD) parameters for each sub-layer of each bitstream partition of a video bitstream; and process the video bitstream using the HRD parameters. The video coder may code the HRD parameters in the form of a loop over the HRD parameters that is iterated for each of the sub-layers, and/or indexes to respective sets of HRD parameters for each of the sub-layers. | 12-24-2015 |
20150373357 | SYSTEMS AND METHODS FOR INTRA-BLOCK COPY - Techniques and systems are provided for encoding and decoding video data. For example, a method of encoding video data includes obtaining video data at an encoder, and determining to perform intra-picture prediction on the video data, using intra-block copy prediction, to generate the plurality of encoded video pictures. The method also includes performing the intra-picture prediction on the video data using the intra-block copy prediction, and, in response to determining to perform the intra-picture prediction on the video data using the intra-block copy prediction, disabling at least one of inter-picture bi-prediction or inter-picture uni-prediction for the plurality of encoded video pictures. The method also includes generating the plurality of encoded video pictures based on the received video data according to the performed intra-block copy prediction. | 12-24-2015 |
20150373358 | SYSTEMS AND METHODS FOR INTRA-BLOCK COPY - Techniques and systems are provided for encoding and decoding video data. For example, a method of encoding video data including a plurality of pictures is described. The method includes performing intra-picture prediction on a block of one of the pictures to generate a prediction unit. Performing the intra-picture prediction includes selecting a reference block for intra-block copy prediction of a coding tree unit (CTU). The reference block is selected from a plurality of encoded blocks, and blocks within the CTU encoded with bi-prediction are excluded from selection as the reference block. Performing the intra-picture prediction further includes performing intra-block copy prediction with the selected reference block to generate the prediction unit. The method also includes generating syntax elements encoding the prediction unit based on the performed intra-picture prediction. | 12-24-2015 |
20150373359 | METHODS AND SYSTEMS FOR INTRA BLOCK COPY SEARCH ENHANCEMENT - In an intra-block copy video encoding method, an encoder performs a hash-based search to identify a selected set of candidate blocks for prediction of an input video block. For each of the candidate blocks in the selected set, the encoder determines a correlation between, on the one hand, luma and chroma components of the input video block and, on the other hand, luma and chroma components of the respective candidate blocks. A predictor block is selected based on the correlation and is used to encode the input video block. In different embodiments, the correlation may be the negative of the sum of absolute differences of the components, may include a Jaccard similarity measure between respective pixels, or may be based on a Hamming distance between two high precision hash values of the input video block and the candidate block. | 12-24-2015 |
20150373367 | Method for Selecting at Least one Encoding Parameter in a Video Encoder, with a Supplementary Smoothness Constraint - A method is proposed of selection, for a current image portion to be encoded and for at least one encoding module included in a video encoder, of at least one encoding parameter from amongst a set of encoding parameters available for the at least one encoding module. The method is based on a decision model defining a minimization, under a rate constraint, of a first measurement of distortion between source samples, included in the current image portion to be encoded, and current reconstructed samples, included in a current reconstructed image portion, obtained from the current image portion to be encoded. The decision model defines the minimization under an additional smoothness constraint, pertaining to a second measurement of distortion between the current reconstructed samples and preceding reconstructed samples, belonging to a temporal reference neighborhood comprising at least one preceding reconstructed image portion obtained from at least one preceding encoded image portion. | 12-24-2015 |
20150373368 | METHOD AND APPARATUS FOR PROCESSING VIDEO - Provided is an apparatus for processing a video. The apparatus for processing a video includes an image receiving module that is configured to receive encoded data, a filtering module that is configured to filter an image frame reconstructed from the encoded image, a block dividing module to output a plurality of blocks in identical size by dividing the filtered image frame into a predetermined block dividing unit, a compression module to compress each of the plurality of blocks, to package the compressed plurality of blocks into a predetermined packaging unit, and a frame buffer memory that is configured to record the packaged data and the lookup table information. | 12-24-2015 |
20150373369 | ANAMORPHIC STRETCH IMAGE COMPRESSION - A feature-selective compression method and system are described which uses a transformation causing feature-selective stretching of the image being compressed. As a result, additional samples are allocated to sharp features where they are needed, and less to coarse features where they are redundant. The method can be applied to still and video images, whether they are monochrome or color images or 3D images, and operates in open-loop fashion and does not require prior knowledge of the image. The method can be applied by itself or combined with other types of compression (i.e., JPEG, WebP) to further compress the image. | 12-24-2015 |
20150373371 | IMAGE CODING METHOD, IMAGE DECODING METHOD, IMAGE CODING APPARATUS, IMAGE DECODING APPARATUS, AND IMAGE CODING AND DECODING APPARATUS - A data conversion system includes an encoding device configured to encode, into a bitstream, pieces of binary data indicating first intra prediction modes for encoding a first image, and a decoding device configured to decode second intra prediction modes for decoding a second image. A data conversion method includes encoding, into a bitstream, pieces of binary data indicating first intra prediction modes for encoding a first image, and decoding second intra prediction modes for decoding a second image. | 12-24-2015 |
20150373372 | SYSTEMS AND METHODS FOR MODEL PARAMETER OPTIMIZATION IN THREE DIMENSIONAL BASED COLOR MAPPING - Systems, methods, and devices are disclosed for performing adaptive color space conversion and adaptive entropy encoding of LUT parameters. A video bitstream may be received and a first flag may be determined based on the video bitstream. The residual may be converted from a first color space to a second color space in response to the first flag. The residual may be coded in two parts separated by the most significant bits and least significant bits of the residual. The residual may be further coded based on its absolute value. | 12-24-2015 |
20150373377 | VALUE RANGES FOR SYNTAX ELEMENTS IN VIDEO CODING - Systems and methods for coding video data are disclosed. The method can include determining a reference picture set (RPS) for a current picture based on one or more reference pictures. The method can also include determining a picture order count (POC) value of each reference picture of the RPS and identifying at least one of a number of long-term reference pictures and a number of short-term reference pictures within the RPS. The method can also include applying constraints to the number of long-term pictures and the number of short-term pictures in the RPS, the constraints being based on the POC value and a maximum decoded picture buffer size minus one, if a video sequence parameter (VPS) extension is in use. The method can include generating at least one syntax element identifying the RPS based on the constraints and encoding the current picture based on the at least one syntax element. | 12-24-2015 |
20150381988 | METHOD AND DEVICE FOR REDUCING A COMPUTATIONAL LOAD IN HIGH EFFICIENCY VIDEO CODING - A method for reducing a computational load in high efficiency video coding includes generating a full rate distortion calculation list of selected intra coding modes where the intra coding modes including intra prediction modes and depth modeling modes. A rate distortion cost is determined, with a segment-wise depth coding mode being disabled, for each intra prediction mode in the full rate distortion calculation list and a smallest rate distortion cost intra prediction mode is selected. A rate distortion cost for a particular intra prediction mode is calculated with the segment-wise depth coding mode enabled. After comparison, one of the particular intra prediction mode and the smallest rate distortion cost intra prediction mode having the smallest rate distortion cost is applied to a prediction unit. | 12-31-2015 |
20150381992 | IMAGE ENCODING DEVICE, IMAGE ENCODING METHOD, IMAGE DECODING DEVICE, IMAGE DECODING METHOD, PROGRAM, AND STORAGE MEDIUM - A prediction set determining section selects a prediction set from a prediction set group including a plurality of prediction sets having different combinations of prediction modes corresponding to different prediction directions. Further, a prediction mode determining section selects a prediction mode from the prediction set thus selected. An entropy encoding section encodes the prediction set thus selected, the prediction mode thus selected, and residual data between an input image and a predicted image formed on the basis of the prediction set and the prediction mode. This allows an image encoding device to carry out predictions from more various angles, thereby improving prediction efficiency. | 12-31-2015 |
20150382002 | METHOD AND APPARATUS FOR MULTIPLEXING AND DEMULTIPLEXING VIDEO DATA TO IDENTIFY REPRODUCING STATE OF VIDEO DATA - A method and apparatus for multiplexing and de-multiplexing video data. The method of multiplexing the video data involves syntax to a header of transmission unit data that is used to multiplex a clean random access (CRA) picture used in a random access, wherein the predetermined syntax indicates a reproduction status of the CRA picture, i.e., normal reproduction or reproduction according to a random access. | 12-31-2015 |
20150382005 | SYSTEM AND METHOD FOR MOTION COMPENSATION IN VIDEO CODING - A method and user equipment for decoding a bitstream of video. The user equipment includes a transceiver and a decoder. The transceiver is configured to receive an encoded bitstream of video including a pixel block. The decoder includes processing circuitry configured to select, from among a plurality of vertical interpolation filters, one of a vertical one-dimensional filter and a vertical two-dimensional filter. The processing circuitry is also configured to select, from among a plurality of horizontal interpolation filters, one of a horizontal one-dimensional filter and a horizontal two-dimensional filter. The processing circuitry is also configured to use the selected vertical and horizontal interpolation filters to generate at least one pixel value by interpolating pixels of the pixel block. The processing circuitry is also configured to perform prediction decoding using the at least one pixel value to restore the video. | 12-31-2015 |
20150382006 | VIDEO PROCESSING SYSTEM WITH HIGH DYNAMIC RANGE SENSOR MECHANISM AND METHOD OF OPERATION THEREOF - A video processing system and the method of operation thereof includes: a high dynamic range (HDR) optical sensor having long exposure patterns and short exposure patterns; a prediction unit, coupled to the HDR optical sensor, for generating a prediction from the long exposure patterns and the short exposure patterns; a fixed length coding unit, coupled to the prediction unit, for encoding an enhanced HDR bit stream from the prediction; and a HDR display device for displaying a delivered digital data stream, transformed from the enhanced HDR bit stream. | 12-31-2015 |
20150382016 | Method for Processing Multi-Component Video and Images - A method decodes a picture in a form of a bitstream, wherein the picture includes components, by first receiving the bitstream in a decoder. The decoder includes an intra boundary filtering process. A flag is decoded from the bitstream. Then, the intra boundary filtering process is applied, according to the flag. | 12-31-2015 |
20150382017 | Motion and Quality Adaptive Rolling Intra Refresh - Described herein are techniques related to motion and quality adaptive rolling intra (I) macro-block (MB) that is used to encode a particular image frame. In particular, the rolling I MB configuration may be based upon global motion direction, quantization parameter (QP) value, complexity based roll, and/or QP saturation based roll. | 12-31-2015 |
20150382018 | RECOVERY POINT SEI MESSAGE IN MULTI-LAYER VIDEO CODECS - A device for video encoding multi-layer video data includes a memory configured to store at least a portion of a multi-layer bitstream of video data and one or more processors configured to: encode a first access unit comprising at least a layer and a reference layer of the layer; determine if the first access unit is a recovery point; in response to the first access unit being a recovery point, include in the first access unit, a recovery point SEI message that applies to at least the layer and the reference layer; and generate the first access unit with the SEI message. | 12-31-2015 |
20160007022 | Method and System for Generating a Transform Size Syntax Element for Video Decoding - In a video processing system, a method and system for generating a transform size syntax element for video decoding are provided. For high profile mode video decoding operations, the transform sizes may be selected based on the prediction macroblock type and the contents of the macroblock. A set of rules may be utilized to select from a 4.×.4 or an 8.×.8 transform size during the encoding operation. Dynamic selection of transform size may be performed on intra-predicted macroblocks, inter-predicted macroblocks, and/or direct mode inter-predicted macroblocks. The encoding operation may generate a transform size syntax element to indicate the transform size that may be used in reconstructing the encoded macroblock. The transform size syntax element may be transmitted to a decoder as part of the encoded video information bit stream. | 01-07-2016 |
20160007027 | CODING METHOD AND CODING APPARATUS - The image decoding method includes: determining a context for use in a current block to be processed, from among a plurality of contexts; and performing arithmetic decoding on a bit sequence corresponding to the current block, using the determined context, wherein in the determining: the context is determined under a condition that control parameters of neighboring blocks of the current block are used, when the signal type is a first type, the neighboring blocks being a left block and an upper block of the current block; and the context is determined under a condition that the control parameter of the upper block is not used, when the signal type is a second type, and the second type is one of “ref_idx_l0” and “ref_idx_l1”. | 01-07-2016 |
20160007044 | Method and System for Generating a Transform Size Syntax Element for Video Decoding - In a video processing system, a method and system for generating a transform size syntax element for video decoding are provided. For high profile mode video decoding operations, the transform sizes may be selected based on the prediction macroblock type and the contents of the macroblock. A set of rules may be utilized to select from a 4×4 or an 8×8 transform size during the encoding operation. Dynamic selection of transform size may be performed on intra-predicted macroblocks, inter-predicted macroblocks, and/or direct mode inter-predicted macroblocks. The encoding operation may generate a transform size syntax element to indicate the transform size that may be used in reconstructing the encoded macroblock. The transform size syntax element may be transmitted to a decoder as part of the encoded video information bit stream. | 01-07-2016 |
20160007048 | Method and Apparatus for Repairing Video File - A method and a device for repairing a video file. The method includes the device generating, if frame data of a video frame can be extracted from a video data stream of a corrupted video file according to a video frame structure feature, a video frame sequence from the extracted frame data of the video frame; recording the CODEC type corresponding to the video frame structure feature, storage location information of the video frame sequence, and index data that is used to record a timestamp-based index of the video frame sequence; determining a sequence header of the video frame sequence; and reconstructing, according to the sequence header, the recorded CODEC type, the recorded storage location information, and the recorded index data, container data that complies with a target container format, and generating and outputting a video file in the target container format based on the reconstructed container data. | 01-07-2016 |
20160014410 | PICTURE CODING DEVICE, PICTURE CODING METHOD, PICTURE CODING PROGRAM, PICTURE DECODING DEVICE, PICTURE DECODING METHOD, AND PICTURE DECODING PROGRAM | 01-14-2016 |
20160014411 | METHOD FOR DETERMINING PREDICTOR BLOCKS FOR A SPATIALLY SCALABLE VIDEO CODEC | 01-14-2016 |
20160014413 | IMAGE ENCODING DEVICE AND METHOD AND IMAGE DECODING DEVICE AND METHOD | 01-14-2016 |
20160014434 | INTER-FRAME PREDICTIVE CODING METHOD AND CODER | 01-14-2016 |
20160021374 | IMAGE CODING METHOD AND IMAGE CODING APPARATUS - Provided is an image coding method which obtains a picture, and codes the obtained picture. The image coding method generates a processing block, performs a first intra prediction that selects one intra prediction mode from a first set of candidates based on a component of a first signal contained in the processing block, performs a second intra prediction that selects one intra prediction mode from a second set of candidates based on a component of a second signal contained in the processing block. The first set of candidates includes a plurality of intra prediction modes, and the second set of candidates includes an intra prediction mode, having no dependency between the second intra prediction and the first intra prediction, of the plurality of intra prediction modes. The first intra prediction and the second intra prediction are performed in parallel. | 01-21-2016 |
20160021384 | METHOD OF AND APPARATUS FOR GENERATING AN OUTPUT FRAME - A method and an apparatus are provided for generating an output frame from an input frame, in which the input frame is processed when generating the output frame. A region of a current input frame is compared with a region of a preceding input frame to determine if the region of the current input frame is similar to the region of the preceding input frame. When the region of the current input frame is determined to be similar to the region of the preceding input frame, information relating to processing performed on the region of the preceding input frame when generating a region of a preceding output frame is read, wherein the information is generated during the processing on the region of the preceding input frame. When the information indicates that the processing is unnecessary, a part or all of the processing of the region of the current input frame can be bypassed or eliminated. | 01-21-2016 |
20160021391 | Image Decontouring in High Dynamic Range Video Processing - A set of optimized operational parameter values is generated for performing decontouring operations on a predicted image. The predicted image is predicted from a first image mapped from a second image that has a higher dynamic range than the first image. Based on the set of optimized operational parameter values, smoothen operations and selection/masking based on a residual mask are performed on the predicted image. The set of optimized operational parameter values is encoded into a part of a multi-layer video signal that includes the first image, and can be used by a recipient decoder to generate a decontoured image based on the predicted image and reconstruct a version of the second image. | 01-21-2016 |
20160021392 | LOW-COMPLEXITY INTRA PREDICTION FOR VIDEO CODING - The present invention provides a unique intra prediction process which improves the efficiency of video coding. H.264/AVC uses reference pixels in a horizontal boundary located immediately above a target block to be predicted and reference pixels in a vertical boundary located immediately left of the target block. In the present invention, at least some of one of an array of horizontal boundary pixels and an array of vertical boundary pixels are retrieved. Then, the retrieved pixels are added to the other boundary pixels to extend the array thereof. Intra prediction is performed, based solely on the extended array of boundary pixels. | 01-21-2016 |
20160021393 | Method of Error-Resilient Illumination Compensation for Three- Dimensional Video Coding - A method of illumination compensation for three-dimensional or multi-view encoding and decoding. The method incorporates an illumination compensation flag only if the illumination compensation is enabled and the current coding unit is processed by one 2N×2N prediction unit. The illumination compensation is applied to the current coding unit according to the illumination compensation flag. The illumination compensation flag is incorporated when the current coding unit is coded in Merge mode without checking whether a current reference picture is an inter-view reference picture. | 01-21-2016 |
20160021397 | METHOD FOR PROTECTING A VIDEO FRAME SEQUENCE AGAINST PACKET LOSS - The invention relates to a method for protecting a video frame sequence against random and/or burst packet losses, the method comprising: partitioning the video frame sequence into a plurality of interleaved video frame subsequences; independently encoding the plurality of interleaved video frame subsequences by a differential video codec; generating for at least one of the plurality of interleaved video frame subsequences at least one B frame predicted from another one of the plurality of interleaved video frame subsequences; and using the at least one B frame as redundant B frame for protecting the video frame sequence. | 01-21-2016 |
20160029023 | ENCODING/DECODING METHOD AND DEVICE FOR HIGH-RESOLUTION MOVING IMAGES - A video encoding method includes: determining a size of a current block to be encoded and encoding information for indicating the size of the current block; encoding division information related to dividing the current block into one or more subblocks; predicting a subblock divided from the current block by using an intra prediction mode corresponding to the subblock; generating a residual block by subtracting the predicted block from the subblock; transforming the residual subblock by using a transform size identical to a size of the subblock; and encoding information on transform coefficients of the transformed residual subblock. | 01-28-2016 |
20160029025 | VIDEO ENCODING DEVICE, VIDEO DECODING DEVICE, VIDEO ENCODING METHOD, VIDEO DECODING METHOD, AND PROGRAM - A video decoding device for decoding video using inter prediction comprises decoding control unit setting partition type of CU to be decoded to a type other than N×N which indicates a size of PU obtained by dividing a CU to be decoded is a minimum size, when a prediction mode of the CU to be decoded is an inter prediction and a size of the CU to be decoded is equal to a minimum CU size. | 01-28-2016 |
20160029030 | TRANSMITTING AND RECEIVING A COMPOSITE IMAGE - For a video sequence having at least one composite image comprising a foreground and a transparency mask, a video encoder transmits the encoded foreground image and the encoded transparency mask together with a flag signifying whether or not the encoded transparency mask is to be decoded as a binary transparency mask. Clipping values may be signalled to the decoder for use in clipping of a decoded binary transparency mask. | 01-28-2016 |
20160029033 | INTERLAYER VIDEO ENCODING METHOD AND APPARATUS AND INTERLAYER VIDEO DECODING METHOD AND APPARATUS FOR COMPENSATING LUMINANCE DIFFERENCE - An interlayer video decoding method comprises reconstructing a first layer image based on encoding information acquired from a first layer bitstream; reconstructing a second layer current block determined as a predetermined partition mode and a prediction mode by using interlayer prediction information acquired from a second layer bitstream and a first layer reference block corresponding to a current block of a first layer reconstruction image that is to be reconstructed in a second layer; determining whether to perform luminance compensation on the second layer current block in a partition mode in which the second layer current block is not split; and compensating for luminance of the second layer current block according to whether luminance compensation is performed and reconstructing a second layer image including the second layer current block of which luminance is compensated for. | 01-28-2016 |
20160029035 | INTER-COMPONENT PREDICTION - Reconstructing a second component signal relating to a second component of a multi-component picture from a spatially corresponding portion of a reconstructed first component signal and a correction signal derived from a data stream for the second component promises increased coding efficiency over a broader range of multi-component picture content. By including the spatially corresponding portion of the reconstructed first component signal into the reconstruction of the second component signal, any remaining inter-component redundancies/correlations present such as still present despite a possibly a priori performed component space transformation, or present because of having been introduced by such a priori performed component space transformation, for example, may readily be removed by way of the inter-component redundancy/correlation reduction of the second component signal. | 01-28-2016 |
20160029036 | Method for Coding a Depth Lookup Table - The invention relates to a method ( | 01-28-2016 |
20160029038 | PREDICTOR FOR DEPTH MAP INTRA CODING - In an example, a process for coding video data includes determining a partitioning pattern for a block of depth values comprising assigning one or more samples of the block to a first partition and assigning one or more other samples of the block to a second partition. The process also includes determining a predicted value for at least one of the first partition and the second partition based on the determined partition pattern. The process also includes coding the at least one of the first partition and the second partition based on the predicted value. | 01-28-2016 |
20160029043 | Methods and Systems for Noncausal Predictive Image and Video Coding - The present invention presents fully noncausal predictive encoding and decoding methods for image, video and other signal coding. The presented noncausal predictive image coding methods largely reduce the prohibitive computational cost of the prior invention. The presented noncausal signal encoding method comprises: (1) splitting the source signal into a plurality of noncausal coding units; (2) extending each noncausal coding unit with the selected extension type; and (3) encoding each noncausal coding unit with the selected intra-unit noncausal predictor and intra-unit noncausal predictive encoding method. | 01-28-2016 |
20160029044 | 3D VISUAL DYNAMIC RANGE CODING - A sequence of 3D VDR images and 3D SDR images are encoded using a monoscopic SDR base layer and one or more enhancement layers. A first VDR view and a first SDR view are encoded with a DVDL encoder to output first and second coded signals. A predicted 3D VDR signal is generated, which has first and second predicted VDR views. First and second VDR residuals are generated based on their respective VDR views and predicted VDR views. A DVDL encoder encodes the first and second VDR residuals to output third and fourth coded signals. A 3D VDR decoder, which has two DVDL decoders and SDR-to-VDR predictors use the four coded input signals to generate a single-view SDR, 3D SDR, single-view VDR, or 3D VDR signals. A corresponding decoder is also described, which is capable of decoding these encoded 3D VDR and SDR images. | 01-28-2016 |
20160037170 | GOLDEN FRAME SELECTION IN VIDEO CODING - Techniques related to designating golden frames and to determining frame sizes and/or quantization parameters golden and non-golden frames for video coding are discussed. Such techniques may include designating an frame as a golden frame or a non-golden frame based on whether the frame is a scene change frame, a distance of the frame to a previous golden frame, and an average temporal distortion of the frame and determining a frame size and/or quantization parameter for the frame based on the designation and a temporal distortion of the frame. | 02-04-2016 |
20160037172 | IMAGE ENCODING METHOD, IMAGE DECODING METHOD, IMAGE ENCODING APPARATUS, IMAGE DECODING APPARATUS, IMAGE ENCODING PROGRAM, AND IMAGE DECODING PROGRAM - The image encoding apparatus encodes while predicting an image between different views using a reference image encoded for a view different from a processing target image, and a reference depth map for an object of the reference image when a multiview image of plural different views is encoded. A view-synthesized image is generated for the entire encoding target image using the reference image and the reference depth map. A setting section sets whether to perform prediction for each of encoding target blocks into which the encoding target image is divided, or to perform prediction using the view-synthesized image for the entire encoding target image. Information is encoded to indicate the prediction unit. An encoding section performs predictive encoding on the encoding target image for every encoding target block, while selecting a predicted image generation method when the prediction for every encoding target block as the prediction unit has been selected. | 02-04-2016 |
20160037173 | SCALABLE VIDEO CODING METHOD AND APPARATUS USING INTRA PREDICTION MODE - The present invention relates to a scalable video coding method and apparatus using an intra prediction mode. A decoding method includes configuring a maximum probability mode set for predicting an intra prediction mode for a target decoding block of an enhancement layer so that the maximum probability mode set includes an intra prediction mode for a corresponding block of a reference layer and restoring the target decoding block of the enhancement layer using any one of intra prediction modes included in the maximum probability mode set. | 02-04-2016 |
20160037178 | VIDEO ENCODING METHOD AND APPARATUS THEREOF AND A VIDEO DECODING METHOD AND APPARATUS THEREOF - A video encoding method, a video encoding apparatus, a video decoding method, and a video decoding apparatus are provided. The video encoding method includes reconstructing a first layer image based on encoding information of the first layer image that is obtained from a bitstream, splitting a largest coding unit of a second layer image into coding units based on split information of the second layer image that is obtained from the bitstream, splitting the coding units into prediction units for prediction encoding, determining whether to use a coding tool for decoding a current prediction unit based on at least one among a prediction mode of the current prediction unit among the prediction units, size information of the current prediction unit, and color depth information of the current prediction unit, and decoding the current prediction unit, using the coding tool, in response to the determining to use the coding tool. | 02-04-2016 |
20160037184 | IMAGE PROCESSING DEVICE AND METHOD - Provided is an image processing device including: an in-screen search section configured to detect, with respect to an image of a lower layer of a current layer, a corresponding block which corresponds to a current block of the current layer and to perform an in-screen motion search on the detected corresponding block; and an intra prediction section configured to generate a predictive image of the current block using information of the in-screen motion searched for by the in-screen search section. | 02-04-2016 |
20160037185 | METHODS AND APPARATUSES FOR CODING AND DECODING DEPTH MAP - Embodiments of the present invention provide methods and devices for coding and decoding a depth map, including: determining to perform simplified depth coding (SDC) decoding according to a flag of an SDC mode; determining a size of an image block and a maximum prediction size; determining an intra-frame prediction mode; in a case in which the size of the image block is greater than the maximum prediction size, splitting the image block to obtain N split image blocks; and performing the SDC decoding on the N split image blocks by using the intra-frame prediction mode. In this way, processing efficiency of coding and decoding a depth map can be improved. | 02-04-2016 |
20160044309 | MULTI-LAYER VIDEO CODING METHOD FOR RANDOM ACCESS AND DEVICE THEREFOR, AND MULTI-LAYER VIDEO DECODING METHOD FOR RANDOM ACCESS AND DEVICE THEREFOR - Provided is a method of reconstructing multilayer images including obtaining RAP picture information of a plurality of layers including a base layer and an enhancement layer, independently decoding a RAP picture of the base layer by using RAP picture information, and independently decoding a RAP picture of the enhancement layer by using RAP picture information. | 02-11-2016 |
20160044310 | METHOD AND DEVICE FOR INTRA PREDICTION - A method for decoding an image according to the present invention comprises the steps of receiving and decoding MPM index information for indicating an MPM candidate which is to be used as an intra prediction mode of a current block; generating an MPM candidate list containing a plurality of MPM candidates for the current block; determining the MPM candidate indicated by the decoded MPM index information as the intra prediction mode of the current block, among the plurality of the MPM candidates which constitute the MPM candidate list; and generating a prediction block corresponding to the current block by performing intra prediction for the current block based on the determined intra prediction mode. | 02-11-2016 |
20160044313 | VIDEO-INFORMATION ENCODING METHOD AND VIDEO-INFORMATION DECODING METHOD - A video-information encoding apparatus and decoding apparatus with a guarantee of a fixed processing time. By limiting the amount of data to be input into/output from a CABAC encoding unit and decoding unit on a unit-of-encoding basis, such as one picture, slice, macroblock or block, and by encoding uncompressed video data, it is possible to provide a video-information encoding apparatus and decoding apparatus with a guarantee of a fixed processing time. Thereby, an apparatus with a guarantee of the processing time can be mounted. | 02-11-2016 |
20160044316 | ENCODING/DECODING APPARATUS AND METHOD USING FLEXIBLE DEBLOCKING FILTERING - A video decoding method performed by a video decoding apparatus includes: generating a quantized frequency transform block by decoding a bitstream; reconstructing a residual block by inversely quantizing and inversely transforming the quantized frequency transform block; generating a prediction block corresponding to a current block; reconstructing the current block by adding the generated prediction block to the reconstructed residual block; and performing a deblocking filtering with respect to a boundary between subblocks within a frame including the reconstructed current block, by allowing numbers of filtered pixels in a first block of the subblocks and a second block of the subblocks that engage in the filtering to be different depending on one or more predetermined criterion. | 02-11-2016 |
20160044326 | METHOD AND APPARATUS FOR DECODING INTRA PREDICTION MODE - A method of decoding an intra prediction mode, can include reconstructing an intra prediction mode group indicator and a prediction mode index, constructing an MPM group including three intra prediction modes using valid intra prediction modes of left and top blocks of the current block, determining an intra prediction mode of the MPM group corresponding to the prediction mode index as the intra prediction mode of the current block when the intra prediction mode group indicator indicates that the intra prediction mode of the current block belongs to the MPM group and determining the intra prediction mode of the current block using the prediction mode index and the three intra prediction modes of the MPM group when the intra prediction mode group indicator indicates that the intra prediction mode of the current block does not belong to the MPM group. | 02-11-2016 |
20160044330 | METHOD AND APPARATUS FOR DECODING MULTI-LAYER VIDEO, AND METHOD AND APPARATUS FOR ENCODING MULTI-LAYER VIDEO - Apparatuses and methods configured to encode and decode multi-layer video are provided. A method of prediction-decoding a multi-layer video includes obtaining information indicating whether a decoded picture buffer (DPB) storing a first layer and a DPB storing a second layer operate identically, and operating the DPB storing the second layer based on the obtained information. | 02-11-2016 |
20160044336 | METHOD AND APPARATUS FOR PERFORMING INTRA-PREDICTION USING ADAPTIVE FILTER - Provided is a method and apparatus for performing intra-prediction using an adaptive filter. The method for performing intra-prediction comprises the steps of: determining whether or not to apply a first filter for a reference pixel value on the basis of information of a neighboring block of a current block; applying the first filter for the reference pixel value when it is determined to apply the first filter; performing intra-prediction on the current block on the basis of the reference pixel value; determining whether or not to apply a second filter for a prediction value according to each prediction mode of the current block, which is predicted by the intra-prediction performance on the basis of the information of the neighboring block; and applying the second filter for the prediction value according to each prediction mode of the current block when it is determined to apply the second filter. | 02-11-2016 |
20160044337 | METHOD AND APPARATUS FOR PERFORMING INTRA-PREDICTION USING ADAPTIVE FILTER - Provided is a method and apparatus for performing intra-prediction using an adaptive filter. The method for performing intra-prediction comprises the steps of: determining whether or not to apply a first filter for a reference pixel value on the basis of information of a neighboring block of a current block; applying the first filter for the reference pixel value when it is determined to apply the first filter; performing intra-prediction on the current block on the basis of the reference pixel value; determining whether or not to apply a second filter for a prediction value according to each prediction mode of the current block, which is predicted by the intra-prediction performance on the basis of the information of the neighboring block; and applying the second filter for the prediction value according to each prediction mode of the current block when it is determined to apply the second filter. | 02-11-2016 |
20160044340 | Method and System for Real-Time Video Encoding Using Pre-Analysis Based Preliminary Mode Decision - The present invention discloses a method and system for real-time video encoding using pre-analysis based preliminary mode decision. The system includes a sequence classifier module | 02-11-2016 |
20160050419 | DEPTH MODELING MODES FOR DEPTH MAP INTRA CODING - In an example, a process for coding video data includes coding, with a variable length code, a syntax element indicating depth modeling mode (DMM) information for coding a depth block of video data. The process also includes coding the depth block based on the DMM information. | 02-18-2016 |
20160050422 | Method, apparatus and system for generating intra-predicted samples - A method of generating intra-predicted samples for a chroma channel of a video bitstream configured for a 4:2:2 chroma format. An intra-prediction angle is determined from an intra-prediction mode for the chroma channel, the intra-prediction mode being one of a plurality of horizontal intra-prediction modes. The intra-prediction angle due to the 4:2:2 chroma format is adjusted. A change threshold between the horizontal intra-prediction modes and vertical intra-prediction modes is modified if the adjusted angle exceeds a predetermined value, the modified change threshold being configured for converting the adjusted intra-prediction angle from one of the plurality of horizontal intra-prediction modes to a vertical intra-prediction mode. Intra-predicted samples are generated using a vertical intra-prediction mode according to the adjusted intra-prediction angle, and the change threshold. | 02-18-2016 |
20160050423 | METHOD AND APPARATUS FOR SCALABLE VIDEO ENCODING USING SWITCHABLE DE-NOISING FILTERING, AND METHOD AND APPARATUS FOR SCALABLE VIDEO DECODING USING SWITCHABLE DE-NOISING FILTERING - Provided are scalable video encoding and decoding methods by using a de-noise filtering. The scalable video decoding method includes generating reconstructed base layer images from a base layer image stream; determining a reference picture list including at least one of a reconstructed base layer image corresponding to a current enhancement layer image, from among the reconstructed base layer images, and a de-noise reconstructed base layer image, from an enhancement layer image stream; and reconstructing the current enhancement layer image by using a reference image that is determined from the reference picture list. | 02-18-2016 |
20160050424 | METHOD AND APPARATUS FOR DECODING MULTI-LAYER VIDEO, AND METHOD AND APPARATUS FOR ENCODING MULTI-LAYER VIDEO - A method of decoding multi-layer video includes decoding a first layer picture, storing the decoded first layer picture in a decoded picture buffer (DPB), and marking the first layer picture as a short-term reference picture; obtaining interlayer reference picture set (RPS) information regarding a second layer picture having a same first picture order count (POC) as the first layer picture; marking the first layer picture, which is marked as the short-term reference picture, as a long-term reference picture, based on the interlayer RPS information; performing interlayer prediction with respect to the second layer picture with reference to the first layer picture; decoding the second layer picture based on a result of performing the interlayer prediction; and, after the second layer picture is decoded, marking the first layer picture, which is marked as the long-term reference picture, as a short-term reference picture. | 02-18-2016 |
20160050434 | SYSTEM AND METHOD FOR ENCODING VIDEO CONTENT USING VIRTUAL INTRA-FRAMES - Systems and methods are provided for encoding raw image content encoded using one or more virtual intra-frames. In an exemplary method, a stream of video content may be encoded to generate compressed video data that includes an intra-flame and a plurality of corresponding inter-frames. The compressed video data may be stored within a buffer, and when the amount of data in the buffer exceeds a threshold value, a virtual intra-frame may be computed based on decoded inter-frame data. The virtual intra-frame may be output for storage in the buffer. | 02-18-2016 |
20160050435 | Method of Texture Merging Candidate Derivation in 3D Video Coding - A method of depth map coding for a three-dimensional video coding system incorporating consistent texture merging candidate is disclosed. According to the first embodiment, the current depth block will only inherit the motion information of the collocated texture block if one reference depth picture has the same POC (picture order count) and ViewId (view identifier) as the reference texture picture of the collocated texture block. In another embodiment, the encoder assigns the same total number of reference pictures for both the depth component and the collocated texture component for each reference list. Furthermore, the POC (picture order count) and the ViewId (view identifier) for both the depth image unit and the texture image unit are assigned to be the same for each reference list and for each reference picture. | 02-18-2016 |
20160050437 | METHOD AND APPARATUS FOR PROCESSING VIDEO SIGNAL - A video signal processing method according to the present invention comprises: obtaining a depth prediction value of a current block; recovering a depth residual per sample of the current block according to an SDC mode indicator; and recovering a depth value of the current block using the depth prediction value and the recovered depth residual. The present invention adaptively uses an SDC mode according to an SDC mode indicator and further uses an SDC mode and/or depth lookup table, thereby increasing encoding efficiency for depth data. | 02-18-2016 |
20160050439 | METHOD, SYSTEM AND DEVICE FOR CODING AND DECODING DEPTH INFORMATION - Disclosed are a method, system and device for coding and decoding depth information, and the method includes: data in original Depth Look-up Tables (DLTs) of selected views are combined to establish a unified DLT, a value of the number of elements in the unified DLT and each element in the unified DLT are coded respectively and a coded value and each coded element are transmitted to a decoder; and depth information of each view is coded by taking the unified DLT as a whole or in portions and coded depth information of each view is transmitted to the decoder. | 02-18-2016 |
20160050441 | VIDEO ENCODING APPARATUS, VIDEO DECODING APPARATUS, VIDEO ENCODING METHOD, VIDEO DECODING METHOD, AND COMPUTER PROGRAM - A video encoding apparatus, which encodes a digital video provided as a video signal of a pixel value space subjected to spatial and temporal sampling, includes a nonlinear video decomposition unit, a structure component encoding unit, and a texture component encoding unit. The nonlinear video decomposition unit decomposes an input video a into a structure component and a texture component. The structure component encoding unit performs compression encoding processing on the structure component of the input video a decomposed by the nonlinear video decomposition unit. The texture compression encoding unit performs compression encoding processing on the texture component of the input video a decomposed by the nonlinear video decomposition unit. Such an arrangement provides improved encoding efficiency. | 02-18-2016 |
20160057414 | METHOD FOR ENCODING A PLURALITY OF INPUT IMAGES, AND STORAGE MEDIUM HAVING PROGRAM STORED THEREON AND APPARATUS - A method for encoding a plurality of input images containing mutually related information is provided. The method includes the steps of estimating a motion image indicating a change component from one or more previous input images, contained in a subsequent input image, generating a residual image from a difference between the subsequent input image and the estimated motion image, specifying a region whose pixel value should be defined by a remainder among pixels constituting the residual image, based on the pixel value of the residual image, converting, into a remainder, the pixel value for the specified region which should be defined by a remainder, and encoding the residual image after the conversion and additional information specifying the region which should be defined by a remainder. | 02-25-2016 |
20160057417 | VIDEO ENCODING DEVICE AND VIDEO DECODING DEVICE - The invention relates to a video encoding device and a video decoding device, and reduces the amount of calculation when applying depth intra-prediction for depth maps, targeting textures and depth maps at respective viewpoints in a multi-view video image. Average calculations and SAD calculations are performed in respective calculation target regions partitioned by wedgelets, and a wedgelet with the minimum SAD for the block is used for prediction. Here, partitioning a target block into sub-blocks and limiting a calculation target region by determining whether to include each sub-block in a calculation target region with each wedgelet based on a region where said wedgelet passes in each sub-block enables reducing the amount of calculation. | 02-25-2016 |
20160057430 | Method, apparatus and system for predicting a block of video samples - A method of decoding a current block encoded using intra-prediction includes determining prediction modes for coding blocks neighbouring the current block. The method generates prediction values for edge samples of the decoded block from intra-prediction reference samples of the neighbouring coding blocks by applying an intra-prediction process to the intra-prediction encoded current block if a number of the neighbouring coding blocks determined to one of use intra-block copy prediction mode and palette mode is greater than or equal to a predetermined threshold. Alternatively the method generates the prediction values for the edge samples of the decoded block from intra-prediction reference samples of the neighbouring coding blocks by applying a filter, preferably an intra-boundary filter, to reference samples of the neighbouring blocks. The current block is then decoded based on the prediction values. | 02-25-2016 |
20160057435 | APPARATUS AND METHOD FOR ENCODING - An encoding apparatus in accordance with an embodiment of the present invention includes: an encoder configured to request for storage of an original frame; a frame processing unit configured to generate an encoded frame having the original framed encoded therein; and a frame memory configured to store the encoded frame. Here, the frame processing unit is configured to generate the original frame by encoding the encoded frame stored in the frame memory according to a request of the encoder, and the encoder is configured to perform encoding according to the original frame. | 02-25-2016 |
20160057439 | IMAGE DECODING DEVICE AND IMAGE CODING DEVICE - A hierarchical moving image decoding device ( | 02-25-2016 |
20160057444 | METHOD AND APPARATUS FOR ENCODING OR DECODING AN IMAGE WITH INTER LAYER MOTION INFORMATION PREDICTION ACCORDING TO MOTION INFORMATION COMPRESSION SCHEME - The invention concerns a method, device, and computer program for motion vector prediction in scalable video encoder and decoder. | 02-25-2016 |
20160057447 | METHODS INCORPORATING EXTENSIONS TO COPY-ABOVE MODE FOR PALETTE MODE CODING - Methods incorporating extensions to copy-above mode for palette mode coding are disclosed. In one aspect, the method includes coding a current pixel of a current block of video data in copy-previous mode via coding a previous line index. The coding of the current pixel in copy-previous mode further including identifying a number of candidate values for the previous line index, identifying a number of escape pixels in a column of pixels above the current pixel in the current block, and reducing a number of candidate values of the previous line index by the number of identified escape pixels. | 02-25-2016 |
20160057448 | LOW-COMPLEXITY INTRA PREDICTION FOR VIDEO CODING - The present invention provides a unique intra prediction process which improves the efficiency of video coding. H.264/AVC uses reference pixels in a horizontal boundary located immediately above a target block to be predicted and reference pixels in a vertical boundary located immediately left of the target block. In the present invention, at least some of one of an array of horizontal boundary pixels and an array of vertical boundary pixels are retrieved. Then, the retrieved pixels are added to the other boundary pixels to extend the array thereof. Intra prediction is performed, based solely on the extended array of boundary pixels. | 02-25-2016 |
20160057449 | Intra Prediction Apparatus - Provided is an intra prediction apparatus that adaptively filters reference pixels according to an intra prediction mode and a size of a prediction block, and generates the prediction block using reference pixels determined by the intra prediction mode. The reference pixels are adaptively filtered according to the size of the prediction block for intra prediction modes existing between a horizontal mode and an intra prediction mode having a direction of 45° with reference to the horizontal mode. When the reference pixels for a second directional intra prediction mode are filtered, the reference pixels for a first directional intra prediction mode, that is closer to the intra prediction mode having the direction of 45° with reference to the horizontal mode than the second directional intra prediction mode is, are also filtered. The number of intra prediction modes in which the filter is applied increases as the size of the prediction block increases. Accordingly, an image compression ratio can be improved. | 02-25-2016 |
20160057450 | Intra Prediction Apparatus - Provided is an intra prediction apparatus that adaptively filters reference pixels according to an intra prediction mode and a size of a prediction block, and generates the prediction block using reference pixels determined by the intra prediction mode. The reference pixels are adaptively filtered according to the size of the prediction block for intra prediction modes existing between a horizontal mode and an intra prediction mode having a direction of 45° with reference to the horizontal mode. When the reference pixels for a second directional intra prediction mode are filtered, the reference pixels for a first directional intra prediction mode, that is closer to the intra prediction mode having the direction of 45° with reference to the horizontal mode than the second directional intra prediction mode is, are also filtered. Accordingly, an image compression ratio can be improved. | 02-25-2016 |
20160057451 | SPATIAL PREDICTION METHOD, IMAGE DECODING METHOD, AND IMAGE CODING METHOD - A spatial prediction method capable of reducing the complexity of spatial prediction includes: detecting an edge (E) overlapping the current block by obtaining a horizontal gradient (Gy) and a vertical gradient (Gx) between pixels within a block adjacent to the current block; calculating an integer slope of the edge; determining, for each pixel position within the current block, a sub-pel position being an intersection between (i) a line that has the integer slope and passes through the pixel position and (ii) a boundary of the adjacent block; and predicting, for each pixel position, a pixel value at the pixel position based on a pixel value interpolated in the sub-pel position, wherein the boundary of the adjacent block is a row or a column that is the closest to the current block, among rows or columns of pixels included in the adjacent block. | 02-25-2016 |
20160057452 | Methods and devices for coding and decoding depth information, and video processing and playing device - Disclosed are methods and devices for coding and decoding depth information, which relate to a Three-Dimensional Video (3DV) coding technology. The coding method includes: arranging all elements in a DLT in an ascending order of values, wherein the DLT is a data structure representing depth numerical values by index numbers; coding a value of a first element in the DLT, and writing the bits of the value into a bitstream; and coding a differential value between a value of each of the other elements except the first element in the DLT and a value of an element with an index number smaller than an index number of the each of other elements in the DLT respectively, and writing the value of the differential value into the bitstream. The method for decoding depth information and related coding and decoding devices are also provided. By the technical solutions of the disclosure, efficiency of coding and decoding depth information is improved, and resource occupation during depth information coding is reduced. | 02-25-2016 |
20160057453 | Method and Apparatus of Camera Parameter Signaling in 3D Video Coding - A method of three-dimensional video encoding and decoding that adaptively incorporates camera parameters in the video bitstream according to a control flag is disclosed. The control flag is derived based on a combination of individual control flags associated with multiple depth-oriented coding tools. Another control flag can be incorporated in the video bitstream to indicate whether there is a need for the camera parameters for the current layer. In another embodiment, a first flag and a second flag are used to adaptively control the presence and location of camera parameters for each layer or each view in the video bitstream. The first flag indicates whether camera parameters for each layer or view are present in the video bitstream. The second flag indicates camera parameter location for each layer or view in the video bitstream. | 02-25-2016 |
20160057454 | METHOD FOR ENCODING AND METHOD FOR DECODING A LUT AND CORRESPONDING DEVICES - A method for encoding a LUT defined as a lattice of vertices is disclosed. At least one value is of each vertex of the lattice. The method comprises for a current vertex:
| 02-25-2016 |
20160065958 | METHOD FOR ENCODING A PLURALITY OF INPUT IMAGES, AND STORAGE MEDIUM HAVING PROGRAM STORED THEREON AND APPARATUS - A method for encoding a plurality of input images is provided. The method includes the steps of generating a first residual image from a difference between a first input image and a corresponding first predicted image, converting, into a remainder, a pixel value included in a region of the first residual image which should be defined by a remainder, generating a second residual image from a difference between a second input image and a corresponding second predicted image, converting, into a remainder, the pixel value included in a region of the second residual image which should be defined by a remainder, and coding the first residual image after the conversion, the second residual image after the conversion, and additional information specifying the region which should be defined by a remainder in each of the first residual image and the second residual image. | 03-03-2016 |
20160065976 | INTER-LAYER REFERENCE PICTURE ENHANCEMENT FOR MULTIPLE LAYER VIDEO CODING - A video device may generate an enhanced inter-layer reference (E-ILR) picture io assist in predicting an enhancement layer picture of a. scalable bitstream. An E-ILR picture may include one or more E-ILR blocks. An E-ILR block may be generated using a differential method, a residual method, a bi-prediction method, and/or a uni-prediction method. The video device may determine a first time instance. The video device may subtract a block of a first base layer picture characterized by the first time instance from a block of an enhancement layer picture characterized by the first time instance to generate a differential block characterized by the first time instance. The video device may perform motion compensation on the differential block and add the motion compensated differential picture to a block of the second base layer picture characterized by the second time instance to generate an E-ILR. block. | 03-03-2016 |
20160065982 | METHOD FOR DETERMINING WHETHER OR NOT PRESENT IMAGE IS REFERENCE IMAGE, AND APPARATUS THEREFOR - Provided is a method of decoding a video, the method including: obtaining, from a received data stream, information indicating whether a current slice segment is a dependent slice segment; obtaining constraint information from a reserved bit included in the received data stream when the current slice segment is not the dependent slice segment, based on the obtained information; and determining whether the current image is used as a reference image for predicting another image, based on the obtained constraint information. | 03-03-2016 |
20160065983 | METHOD AND APPARATUS FOR ENCODING MULTI LAYER VIDEO AND METHOD AND APPARATUS FOR DECODING MULTILAYER VIDEO - A method of prediction decoding a multilayer video is provided. The method includes for each layer of a multilayer video, obtaining information indicating whether a layer included in the multilayer video is used as a reference layer of a current layer; and obtaining an inter layer reference picture set (RPS) of the current layer in which each reference layer is aligned according to a difference value in a layer index value between the current layer and a layer used as the reference layer of the current layer based on the obtained information. | 03-03-2016 |
20160065988 | VIDEO ENCODING APPARATUS, VIDEO DECODING APPARATUS, VIDEO ENCODING METHOD, VIDEO DECODING METHOD, AND COMPUTER PROGRAM - An intra prediction unit that performs intra-frame prediction includes a luminance reference pixel acquisition unit and a chrominance reference pixel acquisition unit. When the coding unit is set to a smallest CU block, the luminance reference pixel acquisition unit subsamples reference pixels arranged at integer pixel locates neighboring a luminance block that corresponds to a chrominance prediction target block, and acquires the pixel values of the reference pixels after the subsampling. Furthermore, when the coding unit is set to a smallest CU block, the chrominance reference pixel acquisition unit subsamples reference pixels arranged at integer pixel locates neighboring the chrominance prediction target block, and acquires the pixel values of the reference pixels after the subsampling. Such an arrangement is capable of reducing the number of reference pixels used to reduce the redundancy between the color components. | 03-03-2016 |
20160065989 | INTERLAYER VIDEO ENCODING METHOD AND APPARATUS FOR USING VIEW SYNTHESIS PREDICTION, AND VIDEO DECODING METHOD AND APPARATUS FOR USING SAME - An interlayer video decoding method includes reconstructing color and depth images of a first layer obtained from a bitstream, based on encoding information of the color and depth images of the first layer; determining whether a prediction mode of a current block of a second layer image to be decoded corresponds to a merge mode; adding at least one of an inter-view candidate, a spatial candidate, a disparity candidate, a view synthesis prediction candidate, and a temporal candidate to candidates to a merge candidate list according to a predetermined priority in response to the prediction mode corresponding to the merge mode; selecting at least one candidate from the merge candidate list, based on a merge index obtained from the bitstream, to decode the current block based on the selected at least one candidate. The view synthesis prediction candidate is added to the merge candidate list with a fixed priority. | 03-03-2016 |
20160065990 | IMAGE ENCODING METHOD, IMAGE DECODING METHOD, IMAGE ENCODING APPARATUS, IMAGE DECODING APPARATUS, IMAGE ENCODING PROGRAM, IMAGE DECODING PROGRAM, AND RECORDING MEDIA - An image encoding device and an image decoding device encodes with a low overall output size while preventing encoding-efficiency degradation in occlusion regions. When encoding a multiview image comprising a plurality of images from different perspectives, this device, using a reference image from a different perspective from a target image being encoded and a reference depth map for a subject in said reference image, encodes while performing image prediction across different perspectives. The device is provided with: a combined-perspective-image generation unit that uses the reference image and reference depth map to generate a combined-perspective image for the target image; a usability determination unit that, for each encoding region determines whether or not the combined-perspective image is usable; and an image encoding unit that performs predictive encoding on the target image while selecting predicted-image generation methods for encoding regions for which the combined-perspective image was determined to be unusable. | 03-03-2016 |
20160065991 | METHOD AND SYSTEM FOR MOTION-COMPENSATED FRAME-RATE UP-CONVERSION FOR BOTH COMPRESSED AND DECOMPRESSED VIDEO BITSTREAMS - A video receiver is operable to receive three-dimensional (3D) video bitstreams from a video transmitter. The received 3D video bitstreams comprises a plurality of video frames and corresponding coding information. The coding information, for example, block motion vectors, block coding modes, quantization levels, and/or quantized residual data, is extracted for performing frame-rate up-conversion on the received plurality of video frames. The coding information is generated at the video transmitter via entropy decoding on a compressed 3D video from a video feed from, for example, an IP TV network. When an uncompressed 3D video is received, the video receiver is operable to perform frame-rate up-conversion on the received uncompressed 3D video using extracted block motion vectors and associated confidence-consistence measure. When a compressed 3D video is received, the video receiver is configured to perform video decompression on the received compressed 3D video prior to the frame-rate up-conversion. | 03-03-2016 |
20160073107 | METHOD AND APPARATUS FOR VIDEO ENCODING/DECODING USING INTRA PREDICTION - The encoding method, according to one embodiment of the present invention, is a video encoding method comprising the steps of: determining an encoding mode of an image block; determining whether a curved-type prediction mode is performed when the encoding mode is an intra prediction; and performing intra encoding according to the whether the curved-shaped prediction has been carried out and the base intra prediction mode. | 03-10-2016 |
20160073109 | IMAGE PROCESSING APPARATUS, IMAGE PROCESSING METHOD, AND STORAGE MEDIUM - An image processing apparatus includes an image processing unit configured to generate a plurality of processed images by performing image processing on a plurality of input images, a determination unit configured to determine, as a reference image for encoding a processed image generated by the image processing on an input image, whether the input image corresponding to the processed image is to be used or another processed image is to be used, based on a parameter relating to the image processing, and an encoding unit configured to encode the processed image by referring to a reference image according to a determination by the determination unit. | 03-10-2016 |
20160073113 | SKIPPED MACROBLOCK VIDEO ENCODING ENHANCEMENTS - Systems and methods for encoding a video stream based upon identified regions of interest (ROI's) are disclosed herein. Standard video encoding schemes require a significant amount of unnecessary data in order to designate blocks to be skipped for a particular video frame of a video stream. Rather than encoding such skip or no skip information for each block (or sequence of blocks) for each frame, embodiments disclosed herein can encode the video stream based upon an identified ROI that represents an area of blocks that change and/or do not remain static from one frame to the next. Designating active areas in terms of the ROI can yield more efficient encoding. | 03-10-2016 |
20160073115 | METHOD FOR DETERMINING INTER-PREDICTION CANDIDATE FOR INTERLAYER DECODING AND ENCODING METHOD AND APPARATUS - An interlayer video decoding method is provided. The interlayer video decoding method includes determining a disparity vector for performing inter layer prediction on a second layer current block with reference to a first layer image; determining a first layer reference location corresponding to the determined disparity vector in relation to a location of the second layer current block; obtaining motion information of at least one peripheral block located in the periphery of the first layer reference location; and adding at least one motion information of the obtained motion information to a candidate list for inter prediction. | 03-10-2016 |
20160073122 | WIRELESS TRANSMISSION OF HIGH QUALITY VIDEO - A method of transmitting video images. The method includes providing a high definition video stream, compressing the video stream using an image domain compression method, in which each pixel is coded based on a vicinity of the pixel and transmitting the compressed video stream over a fading transmission channel. | 03-10-2016 |
20160073124 | TRANSMITTING AND RECEIVING A COMPOSITE IMAGE - For a video sequence including a composite image having a foreground image and a transparency mask, a video encoder determines whether the transparency mask is the same as a transparency mask of a preceding image. Where the transparency mask is not the same, the transparency mask is encoded as an image. The encoder then transmits the encoded foreground image, any encoded transparency mask and a flag signifying whether the encoded transparency mask for a preceding image is to be used in association with the encoded foreground image of the current image. | 03-10-2016 |
20160073125 | VIDEO ENCODING APPARATUS AND METHOD, VIDEO DECODING APPARATUS AND METHOD, AND PROGRAMS THEREFOR - An apparatus performs inter-frame prediction in directions pertaining to time and disparity and predictive-encodes an encoding target video by generating a predicted image whose error is corrected. An encoding target image is predicted by utilizing reference pictures which are previously-decoded pictures in the directions pertaining to time and disparity; and inter-frame reference information and inter-viewpoint reference information which indicate individual reference parts on the reference pictures are determined. A disparity predicted image and a motion predicted image are generated based on the determined information items. A corrective predicted image is generated based on the inter-viewpoint reference information and the inter-frame reference information. The predicted image is generated from the disparity predicted image, the motion predicted image, and the corrective predicted image. | 03-10-2016 |
20160073126 | TECHNIQUES FOR INTER-LAYER RESIDUAL PREDICTION - Techniques for inter-layer residual prediction are described. In one embodiment, for example, an apparatus may comprise an encoding component to determine whether a predicted motion for an enhancement layer block is consistent with a predicted motion for a collocated lower-layer block, determine whether to apply inter-layer residual prediction to the enhancement layer block based on whether the predicted motion for the enhancement layer block is consistent with the predicted motion for the collocated lower-layer block, and in response to a determination that inter-layer residual prediction is to be applied to the enhancement layer block, generate a predicted residual for the enhancement layer block based on a residual for the collocated lower-layer block and generate a second-order residual for the enhancement layer block by comparing a calculated residual to the predicted residual. Other embodiments are described and claimed. | 03-10-2016 |
20160073129 | DEPTH MAP ENCODING METHOD AND APPARATUS THEREOF, AND DEPTH MAP DECODING METHOD AND APPARATUS THEREOF - Disclosed is a depth map frame decoding method including reconstructing a color frame obtained from a bitstream based on encoding information of the color frame; splitting a largest coding unit of a depth map frame obtained from the bitstream into one or more coding units based on split information of the depth map frame; splitting the one or more coding units into one or more prediction units for prediction decoding; determining whether to split a current prediction unit into at least one partition and decode the current prediction unit by obtaining information indicating whether to split the current prediction unit into the at least one or more partitions from the bitstream; if it is determined that the current prediction unit is to be decoded by being split into the at least one or more partitions, obtaining prediction information of the one or more prediction units from the bitstream and determining whether to decode the current prediction unit by using differential information indicating a difference between a depth value of the at least one or more partitions corresponding to an original depth map frame and a depth value of the at least one or more partitions predicted from neighboring blocks of the current prediction unit; and decoding the current prediction unit by using the differential information based on whether to split the current prediction unit into the at least one or more partitions and whether to use the differential information. | 03-10-2016 |
20160073130 | CODING POSITION DATA FOR THE LAST NON-ZERO TRANSFORM COEFFICIENT IN A COEFFICIENT GROUP - Methods and devices for video coding are described. When encoding a non-zero coefficient group (CG) prior to the last such group in a group scan ordering within a transform block, data representative of the true (x,y)-position of the last non-zero transform coefficient in a scan ordering within that CG is modified, to improve coding efficiency, based upon at least one of (a) an intra-prediction mode used to encode the block and (b) at least one coefficient group neighbouring that CG. Upon decoding a CG thus encoded, the modification is un-done to retrieve the true (x,y)-position. | 03-10-2016 |
20160073132 | Method of Simplified View Synthesis Prediction in 3D Video Coding - A method of three-dimensional video encoding or decoding that uses unified depth data access for VSP process and VSP-based merging candidate derivation is disclosed. When the coding tool corresponds to VSP process or VSP-based merging candidate, embodiments of the present invention fetch the same reference depth data in a reference view. A reference depth block in a reference view corresponding to the current texture CU is fetched using a derived DV (disparity vector). For the VSP process, first VSP data for a current PU (prediction unit) within the current CU is generated based on the reference depth block. For the VSP-based merging candidate derivation, second VSP data for a VSP-coded spatial neighboring PU associated with a VSP spatial merging candidates is generated also based on the reference depth block. | 03-10-2016 |
20160073133 | MULTI-VIEW VIDEO ENCODING METHOD USING VIEW SYNTHESIS PREDICTION AND APPARATUS THEREFOR, AND MULTI-VIEW VIDEO DECODING METHOD AND APPARATUS THEREFOR - Provided are a multi-view video decoding apparatus and method and a multi-view encoding apparatus and method. The decoding method includes: determining whether a prediction mode of a current block being decoded is a merge mode; when the prediction mode is determined to be the merge mode, forming a merge candidate list including at least one of an inter-view candidate, a spatial candidate, a disparity candidate, a view synthesis prediction candidate, and a temporal candidate; and predicting the current block by selecting a merge candidate for predicting the current block from the merge candidate list, wherein whether to include, in the merge candidate list, at least one of a view synthesis prediction candidate for an adjacent block of the current block and a view synthesis prediction candidate for the current block is determined based on whether view synthesis prediction is performed on the adjacent block and the current block. | 03-10-2016 |
20160080745 | INTRA PREDICTION METHOD AND APPARATUS - A method for performing an intra prediction according to the present invention may comprise the steps of: generating predicted pixels by performing interpolation using N reference pixels including two adjacent reference pixels according to an intra prediction direction; and generating a residual signal by using the generated predicted pixels. Accordingly, when a prediction for generating the residual signal is performed according to each prediction direction (mode), an optimal filtering method is determined and a predicted value is acquired, so that a size of the residual signal can be minimized and compression performance can be improved. | 03-17-2016 |
20160080747 | MULTI-LAYER VIDEO CODING METHOD FOR RANDOM ACCESS AND DEVICE THEREFOR, AND MULTI-LAYER VIDEO DECODING METHOD FOR RANDOM ACCESS AND DEVICE THEREFOR - Provided is a video decoding method including determining whether a random access point (RAP) picture is positioned in an enhancement layer; determining whether a random access skipped leading (RASL) picture related to the RAP picture is output; and if the RAP picture is positioned in the enhancement layer and the RASL picture is determined not to be output, activating a SPS corresponding to the RAP picture when the RAP picture that is not at a start point of a CVS is decoded. | 03-17-2016 |
20160080748 | IMAGE CODING METHOD FOR CODING INFORMATION INDICATING CODING SCHEME - An image coding method includes a first flag coding step (S | 03-17-2016 |
20160080752 | METHOD AND APPARATUS FOR PROCESSING VIDEO SIGNAL - The present invention provides a method and an apparatus for processing a video signal, and more particularly, a method and an apparatus for processing a video signal, which encode and decode the video signal. | 03-17-2016 |
20160080758 | MOVING PICTURE PREDICTION METHOD, MOVING PICTURE CODING METHOD AND APPARATUS, AND MOVING PICTURE DECODING METHOD AND APPARATUS - An image decoding method is provided which includes a time information determination step of determining time information of a current picture, a first reference picture referred to by the current picture and a second reference picture referred to by the current picture; a scaling parameter calculation step of calculating a scaling parameter based on a time distance between the first reference picture and a second reference picture; a weighting coefficient determination step of determining two weighting coefficients based on the scaling parameter; a predictive pixel value generation step of generating a predictive pixel value of the current picture by scaling a pixel value of the first reference picture and a pixel value of the second reference picture using the two weighting coefficients determined in the weighting coefficient determination step; and a decoding step of decoding the current picture using the predictive pixel value. | 03-17-2016 |
20160080771 | MOTION COMPENSATION APPARATUS HAVING AT LEAST ONE PROCESSING CIRCUIT SHARED BY NORMAL MODE AND RESIZED REFERENCE FRAME MODE AND RELATED MOTION COMPENSATION METHOD - A motion compensation apparatus includes an interpolation filter device, a pixel fetching circuit, and a pixel dispatching circuit. The interpolation filter device generates interpolated pixels by performing interpolation according to reference pixels. The pixel fetching circuit fetches the reference pixels from a reference frame. The pixel dispatching circuit dispatches pixels to the interpolation filter device, wherein the pixels comprise the reference pixels. At least one of the interpolation filter device, the pixel fetching circuit and the pixel dispatching circuit is shared by a normal mode and a resized reference frame (RRF) mode of motion compensation. | 03-17-2016 |
20160080773 | PICTURE DECODING DEVICE, PICTURE DECODING METHOD AND PICTURE DECODING PROGRAM - In a picture coding device for coding picture signals including a brightness signal and a color-difference signal in a block unit using intra-prediction and coding information regarding an intra-prediction mode, when aspect ratios of pixels of the brightness signal and the color-difference signal are different from each other, a bitstream generator converts a mode number of a first intra-color-difference prediction mode used when the aspect ratios are equal to each other into a scaled mode number and derives a second intra-color-difference prediction mode used when the aspect ratios are different from each other. | 03-17-2016 |
20160088296 | In-Loop Adaptive Wiener Filter for Video Coding and Decoding - A video encoder may use an adaptive Wiener filter inside the core video encoding loop to improve coding efficiency. In one embodiment, the Wiener filter may be on the input to a motion estimation unit and, in another embodiment, it may be on the output of a motion compensation unit. The taps for the Wiener filter may be determined based on characteristics of at least a region of pixel intensities within a picture. Thus, the filtering may be adaptive in that it varies based on the type of video being processed. | 03-24-2016 |
20160088303 | METHOD AND APPARATUS FOR CODING VIDEO SUPPORTING PLURALITY OF LAYERS - Disclosed are a method and an apparatus for coding a video supporting a plurality of layers. The method for coding the video supporting the plurality of layers, according to the present invention, comprises the steps of: inducing a reference layer sample location from a reference layer picture used for inter-layer prediction of a current layer picture; resampling the reference layer picture, based on the reference layer sample location; and generating a prediction sample of a current block by inter-layer predicting the current block of the current layer picture, based on the resampled reference layer picture. | 03-24-2016 |
20160088304 | COMPLEXITY SCALABLE MULTILAYER VIDEO CODING - A multi-layer video system has a first layer encoder that encodes a first layer of video information, at least one second layer encoder that encodes at least one second layer of video information, and an encoder side reference processing unit (RPU) that estimates one or more of an optimal filter or an optimal process that applies on a reference picture that is reconstructed from the first video information layer, and processes a current picture of the second video information layer, based on a correlation between the first layer reconstructed reference picture. The correlation relates to a complexity characteristic that scaleably corresponds to the first video information layer reconstructed reference picture and the second video information layer current picture. A scalable video bitstream is outputted, which may be decoded by a compatible decoder. A decoder side RPU and the encoder side RPU function as an RPU pair. | 03-24-2016 |
20160088308 | METHOD AND SYSTEM FOR STAGGERED PARALLELIZED VIDEO DECODING - A method and system for staggered parallelized video decoding system decodes a compressed video stream at approximately double the performance of conventional systems, and outputs the decoded stream to a video display device. Even and odd video frames from the video stream are identified and stored in a memory. A first decoder processes a first portion of a first even frame from among the stored even frames. After the first decoder completes processing the first portion of the first even frame, a second decoder begins processing a first odd frame from among the stored odd frames. The processing start times of the odd frames are staggered with respect to the even frames and vice versa, and the even and odd frames are simultaneously processed using first and second decoders. | 03-24-2016 |
20160088310 | VIDEO ENCODING APPARATUS AND VIDEO DECODING APPARATUS AND ENCODING METHOD AND DECODING METHOD THEREOF - A video encoding apparatus for encoding a plurality of image blocks in a video frame includes an intra-frame prediction module, a transformation module and a quantization module. The intra-frame prediction module performs intra-frame prediction on the image blocks to generate a plurality of residual blocks. The transformation module performs a transformation on a target residual block along a predetermined direction according to a transformation matrix to generate a transformation result. The transformation matrix is a product of an initial transformation matrix and a secondary transformation matrix. The initial transformation matrix corresponds to a one-dimensional initial transform performed along the predetermined direction in a two-dimensional initial transform. The secondary transformation matrix corresponds to a one-dimensional secondary transform performed along the predetermined direction in a two-dimensional secondary transform. The quantization module quantizes the transformation result. | 03-24-2016 |
20160094848 | METHODS AND APPARATUS FOR ILLUMINATION AND COLOR COMPENSATION FOR MULTI-VIEW VIDEO CODING - There are provided a method and apparatus for illumination and color compensation for multi-view video coding. A video encoder includes an encoder for encoding a picture by enabling color compensation of at least one color component in a prediction of the picture based upon a correlation factor relating to color data between the picture and another picture. The picture and the other picture have different view points and both corresponding to multi-view content for a same or similar scene. | 03-31-2016 |
20160094850 | IMAGE CODING METHOD OF CODING A BITSTREAM TO GENERATE A CODING BLOCK USING AN OFFSET PROCESS - An image coding method includes: generating a predicted block; calculating a residual block; calculating quantized coefficients by performing transform and quantization on the residual block; calculating a coded residual block by performing inverse quantization and inverse transform on the quantized coefficients; generating a temporary coded block; determining whether or not an offset process is required, to generate first flag information indicating a result of the determination; executing the offset process on the temporary coded block when it is determined that the offset process is required; and performing variable-length coding on the quantized coefficients and the first flag information. | 03-31-2016 |
20160094853 | SINGLE LOOP DECODING BASED INTER LAYER PREDICTION - Methods, systems, and instrumentalities are described to implement single loop decoding, A video decoding device (VDD) may receive a video bitstream, which may include one or more bitstreams (e.g., base layer bitstream, enhanced layer bitstream, etc.) The VDD may generate a hybrid inter-layer reference (H-ILR) picture. The H-ILR picture may be generated based on one or more inputs including, for example, a first layer motion information, a processed (e.g., upsampled) first layer residue signal, a second layer texture information, etc. The first layer motion information may be derived from a compressed first layer motion field or an uncompressed first layer motion field. An H-ILR block of the H-ILR picture may be reconstructed by deriving motion information of the H-ILR block from one or more neighboring H-ILR blocks in the H-ILR picture, for example, when the neighboring blocks are inter-coded. | 03-31-2016 |
20160094855 | Mode Complexity Based Coding Strategy Selection - A system may receive an input stream for a coding operation. The system may determine available coding modes for the coding operation. The system may include coding selection logic that may determine a coding mode in response to the based on the available selection of coding modes. The coding selection logic may use the selected coding mode to determine a coding strategy. The selection logic may send an indication of the selected coding mode and coding strategy to coding logic to support execution of the coding operation, which may use the selected coding mode and coding strategy. | 03-31-2016 |
20160094860 | IMAGE ENCODING DEVICE, IMAGE ENCODING METHOD, IMAGE DECODING DEVICE, AND IMAGE DECODING METHOD - An image encoding device includes an encoder that encodes a first field of a specific frame as an intra picture which is predicted by using only an ultra prediction, and that encodes the first field of the above-described specific frame, a second field of the above-described specific frame, a picture whose encoding order is later than that of the first field of the above-described specific frame later and whose display order is earlier than that of the first field, and another picture whose encoding order and also display order are later than those of the first field of the above-described specific frame in order of those pictures, and a multiplexer that multiplexes information showing that the first field of the above-described specific frame is a picture, in a bitstream, at which decoding can be started into the above-described bitstream. | 03-31-2016 |
20160100161 | DECODER, ENCODER, DECODING METHOD, ENCODING METHOD, AND CODEC SYSTEM - A method for decoding, a method for encoding, a codec system, a decoder and an encoder are provided. The method includes receiving a first flag corresponding to a coding unit block, and receiving and reading a second flag corresponding to the coding unit block and index values of each pixel of the coding unit block when a state value of the first flag is conformed with a predetermined state value. The method also includes selecting N colors corresponding to N index pixels from a neighboring area of the coding unit block according to the second flag, wherein the second flag indicates an amount of the N colors corresponding to the N index pixels and colors of each of the N colors are different. The method further includes reconstructing pixels of the coding unit block according to the N colors corresponding to the N index pixels. | 04-07-2016 |
20160100191 | PIPELINED INTRA-PREDICTION HARDWARE ARCHITECTURE FOR VIDEO CODING - As the quality and quantity of shared video content increases, video encoding standards and techniques are being developed and improved to reduce bandwidth consumption over telecommunication and other networks. One technique to reduce bandwidth consumption is intra-prediction, which exploits spatial redundancies within video frames. Each video frame may be segmented into blocks, and intra-prediction may be applied to the blocks. However, intra-prediction of some blocks may rely upon the completion (e.g., reconstruction) of other blocks, which can make parallel processing challenging. Provided are exemplary techniques for improving the efficiency and throughput associated with the intra-prediction of multiple blocks. | 04-07-2016 |
20160105657 | HARMONIZATION OF CROSS-COMPONENT PREDICTION AND ADAPTIVE COLOR TRANSFORM IN VIDEO CODING - A video coder transforms, based on a difference between a bit depth of an initial luma sample and a bit depth of initial chroma samples, a set of initial samples to a set of modified samples. The set of initial samples may include the initial luma sample and the initial chroma samples. The initial chroma samples may include an initial Cb sample and an initial Cr sample. The set of modified samples may include a modified luma sample and modified chroma samples. The modified chroma samples may include a modified Cb sample and a modified Cr sample. Additionally, the video coder adds the modified samples to corresponding samples of a predictive block to produce reconstructed samples. | 04-14-2016 |
20160105682 | INTRA BLOCK COPY PREDICTION RESTRICTIONS FOR PARALLEL PROCESSING - According to techniques of this disclosure, a video decoder can be configured to, for one or more blocks coded with wavefront parallel processing enabled, determine a coding tree block (CTB) delay, wherein the CTB delay identifies a delay between when a first row of CTBs starts being decoded and when a second row of CTBs below the first row of CTBs starts being decoded; for a current block of video data coded in an intra-block copy (IBC) mode and coded with wavefront parallel processing disabled, determine an IBC prediction region for the current block within a picture that includes the current block based on the CTB delay that was determined for the one or more blocks coded with wavefront parallel processing enabled; identify, from within the determined IBC prediction region for the current block, a predictive block for the current block; and IBC decode the current block based on the predictive block. | 04-14-2016 |
20160105684 | System and Method for Video Communication - In one embodiment, method for transmitting video includes determining a first video transmission schedule and selecting one frame type of a plurality of frame types to produce a selected encoded frame in accordance with the first video transmission schedule. The method also includes transmitting, by a first device to a second device, the selected encoded. | 04-14-2016 |
20160105685 | BOUNDARY FILTERING AND CROSS-COMPONENT PREDICTION IN VIDEO CODING - Techniques for coding video data include determining that a block of a first component of the video data is intra-predicted using one of a DC mode, a horizontal mode, or a vertical mode, determining that a corresponding block of a second component of the video data is intra-predicted using the same mode as the block of the first component according to a direct mode to form a predicted block for the second component, and boundary filtering the predicted block in response to the determinations. In some examples, the first component is a luma component, and the second component is a chroma component. | 04-14-2016 |
20160112704 | CONTINUOUS PREDICTION DOMAIN - A method for encoding a spherical video is disclosed. The method includes mapping a frame of the spherical video to a two dimensional representation based on a projection. Further, in a prediction process the method includes determine whether at least one block associated with a prediction scheme is on a boundary of the two dimensional representation, and upon determining the at least one block associated with the prediction scheme is on the boundary, select an adjacent end block as a block including at least one pixel for use during the prediction process, the adjacent end block being associated with two or more boundaries of the two dimensional representation. | 04-21-2016 |
20160112709 | ENCODING DEVICE, ENCODING METHOD, TRANSMISSION DEVICE, DECODING DEVICE, DECODING METHOD, AND RECEPTION DEVICE - To enable image data of the interlacing scheme to undergo encoding of an open GOP. An image encoding unit encodes image data of each picture constituting image data in an interlacing scheme in an NAL unit structure and generates a video stream having the encoded image data of each picture. The image encoding unit sets an NAL unit type of a slice of encoded image data of a picture forming a field pair with an intra picture constituting a random access point to a unique type which indicates a picture that is dependent on the intra picture and forms the field pair with the intra picture. | 04-21-2016 |
20160112726 | IMAGE DECODING METHOD INCLUDING DETERMINING A CONTEXT FOR A CURRENT BLOCK ACCORDING TO A SIGNAL TYPE UNDER WHICH A CONTROL PARAMETER FOR THE CURRENT BLOCK IS CLASSIFIED - The image decoding method includes: determining a context for use in a current block to be processed, from among a plurality of contexts; and performing arithmetic decoding on a bit sequence corresponding to the current block, using the determined context, wherein in the determining: the context is determined under a condition that control parameters of neighboring blocks of the current block are used, when the signal type is a first type, the neighboring blocks being a left block and an upper block of the current block; and the context is determined under a condition that the control parameter of the upper block is not used, when the signal type is a second type, and the second type is “intra_chroma_pred_mode”. | 04-21-2016 |
20160119618 | Moving-picture encoding apparatus and moving-picture decoding apparatus - According to one embodiment, an encoding apparatus includes a prediction unit, a classifying unit, a first transformer, a second transformer, an order controller, and an entropy coder. The prediction unit obtains a predictive residual signal to be encoded, by using a mode selected from intra-prediction modes. The first transformer obtains first transformation coefficients by subjecting the signal to an orthogonal transformation by use of a first transformation basis if the selected mode is classified into a mode having a prediction direction. The first transformation basis is preset so that a coefficient density after the orthogonal transformation is higher than a coefficient density. | 04-28-2016 |
20160119627 | ALTERING STREAMING VIDEO ENCODING BASED ON USER ATTENTION - Disclosed are various embodiments for adjusting the encoding of a video signal into a video stream based on user attention. A temporary lapse of attention by a user is predicted. The encoding of the video signal into the video stream is adjusted from an initial state to a conservation state in response to predicting the temporary lapse of attention by the user. The conservation state is configured to conserve one or more resources used for the video stream relative to the initial state. | 04-28-2016 |
20160119631 | VIDEO ENCODING DEVICE, VIDEO DECODING DEVICE, VIDEO SYSTEM, VIDEO ENCODING METHOD, VIDEO DECODING METHOD, AND COMPUTER READABLE STORAGE MEDIUM - In the case where an input image is an image of a non-YUV420 format and an encoding unit is the smallest CU block, an adaptive-sub-sampling luma reference pixel acquisition unit sub-samples reference pixels existing neighboring a luma block corresponding to a chroma prediction target block based on a luma intra prediction mode, and acquires a pixel value of each of the sub-sampled reference pixels. In the case where the input image is an image of a non-YUV420 format and the encoding unit is the smallest CU block, an adaptive-sub-sampling chroma reference pixel acquisition unit sub-samples reference pixels existing neighboring the chroma prediction target block based on the luma intra prediction mode, and acquires a pixel value of each of the sub-sampled reference pixels. | 04-28-2016 |
20160119632 | METHOD AND APPARATUS FOR PREDICTING INTER-LAYER BASED ON TEMPORAL SUB-LAYER INFORMATION - The present invention relates to a method for predicting an inter-layer of an image having a plurality of layers including at least one temporal sub-layer. The method according to present invention comprises the steps of: acquiring information on a temporal sub-layer for inter-layer prediction; inducing a reference picture used for predicting an inter-layer of a current picture on the basis of the information on the temporal sub-layer; and predicting the inter-layer of the current picture on the basis of the reference picture. | 04-28-2016 |
20160119638 | HIGH DYNAMIC RANGE CODECS - A method for encoding high dynamic range (HDR) images involves providing a lower dynamic range (LDR) image, generating a prediction function for estimating the values for pixels in the HDR image based on the values of corresponding pixels in the LDR image, and obtaining a residual frame based on differences between the pixel values of the HDR image and estimated pixel values. The LDR image, prediction function and residual frame can all be encoded in data from which either the LDR image of HDR image can be recreated. | 04-28-2016 |
20160119642 | METHOD AND APPARATUS FOR RESOLUTION ADAPTIVE VIDEO ENCODING WITH SEARCH RANGE CONSTRAINT - An encoding method includes applying a search range constraint on a search range of a block in a current frame, and encoding the block in the current frame with pixel information in a reference frame according to inter prediction performed based on the search range of the block in the current frame, wherein a resolution of the current frame is different from a resolution of the reference frame. | 04-28-2016 |
20160127725 | METHOD AND SYSTEM FOR FAST MODE DECISION FOR HIGH EFFICIENCY VIDEO CODING - Methods and systems for encoding video data are provided. Evolving standards for video encoding such as High Efficiency Video Coding (HEVC) standard require a significant increase in computational complexity for both inter and intra encoding. The method includes calculating an approximate cost of each of a first set of prediction modes. Then selecting a second set of prediction modes from the first set of prediction modes based on probability distributions associated with each of the modes in the first set of prediction modes, the second set having substantially fewer prediction modes than the first. A number of candidate prediction modes prior to rate distortion optimization (RDO) is reduced. Experimental results show that the proposed method provides substantial time reduction up and negligible quality loss as compared to the HEVC reference. | 05-05-2016 |
20160127738 | TECHNIQUES IN BACKWARDS COMPATIBLE MULTI-LAYER COMPRESSION OF HDR VIDEO - A scalable coding system codes video as a base layer representation and an enhancement layer representation. A base layer coder may code an LDR representation of a source video. A predictor may predict an HDR representation of the source video from the coded base layer data. A comparator may generate prediction residuals which represent a difference between an HDR representation of the source video and the predicted HDR representation of the source video. A quantizer may quantize the residuals down to an LDR representation. An enhancement layer coder may code the LDR residuals. In other embodiments, the enhancement layer coder may code LDR-converted HDR video directly. | 05-05-2016 |
20160127743 | LOGICAL INTRA MODE NAMING IN HEVC VIDEO CODING - A method and apparatus of using logical mode numbers during both prediction and coding in the bit stream, such as for high efficiency video coders (HEVC). These logical intra mode numbers are sorted based on angle which as a result leads to improved coding designs with fewer and smaller look-up tables, and a small gain in coding efficiency. Furthermore, by using this type of naming, the number of most probable modes (MPMs) can be readily extended since no additional tables are required. The use of three MPMs achieves a larger gain of 0.25% and 0.31% for the AI_HE and AI_LC cases, respectively. | 05-05-2016 |
20160127744 | LOGICAL INTRA MODE NAMING IN HEVC VIDEO CODING - A method and apparatus of using logical mode numbers during both prediction and coding in the bit stream, such as for high efficiency video coders (HEVC). These logical intra mode numbers are sorted based on angle which as a result leads to improved coding designs with fewer and smaller look-up tables, and a small gain in coding efficiency. Furthermore, by using this type of naming, the number of most probable modes (MPMs) can be readily extended since no additional tables are required. The use of three MPMs achieves a larger gain of 0.25% and 0.31% for the AI_HE and AI_LC cases, respectively. | 05-05-2016 |
20160134866 | SYSTEM AND METHOD FOR INTRA PREDICTION IN VIDEO CODING - A user equipment includes a transceiver and a decoder. The transceiver is configured to receive an encoded bitstream of video. The decoder includes processing circuitry. The decoder is configured to identify a first intra mode associated with a top prediction unit (PU) in relation to a current PU of the encoded bitstream of video. The decoder is also configured to identify a second intra mode associated with a left PU in relation to the current PU. The decoder is also configured to determine a plurality of most probable modes (MPMs) based on the first intra mode and the second intra mode, wherein a number of modes is greater than thirty-five. | 05-12-2016 |
20160134867 | METHOD AND APPARATUS OF DERIVING INTRA PREDICTION MODE USING MOST PROBABLE MODE GROUP - A method of generating a reconstructed block is provided. A mode group indicator and a prediction mode index are entropy-decoded. A quantized block is inversely quantized using a quantization parameter and a quantization matrix to generate a transform block. The transform block is inversely transformed to generate a residual block. A Most Probable Mode (MPM) group including three intra prediction modes is constructed using a left intra prediction mode and an above intra prediction mode of a current prediction unit. An intra prediction mode of the current prediction unit is derived using the mode group indicator and the prediction mode index. Reference pixels of a current block are adaptively filtered according to a size of a transform unit and the intra prediction mode. The prediction block is generated according to the intra prediction mode. The reconstructed block is generated using the prediction block and the residual block. | 05-12-2016 |
20160134882 | Continuous Generation of Non-Displayed Reference Frame in Video Encoding and Decoding - Methods and systems for the transmission of a high quality background reference frame (HQRF). Such a reference frame is sent from a video encoder to a video decoder in a number of portions, or slices. In the context of this description, a slice of a frame is a set of blocks in the frame, where the slice is coded separately from other slices of the frame. The slices are sent at respective intervals, so that the decoder receives the high quality background reference frame over time, in a piecemeal fashion. The slices can be buffered at the decoder, and the buffer may be continuously updated and used for reference at any point. | 05-12-2016 |
20160134885 | Encoder and Decoder and Methods Thereof for Encoding/Decoding a Picture of a Video Sequence - An object of the embodiments is to achieve an improved reference picture handling. That is achieved by taking into account whether the reference pictures in the decoded picture buffer are long-term reference pictures or short-term reference pictures when determining how they should be marked when the information of the reference picture set is received. The reference pictures are marked as “used for short-term reference” or “used for long-term reference” in the Decoded Picture Buffer (DPB) depending on whether they are included as short-term pictures or long-term pictures in the RPS of a current picture. | 05-12-2016 |
20160134888 | VIDEO ENCODING APPARATUS, VIDEO ENCODING METHOD, VIDEO DECODING APPARATUS, AND VIDEO DECODING METHOD - A video encoding apparatus includes: a buffer memory that stores encoded field pictures; a controller that adds reference pair information to each of multiple field pictures, the reference pair information specifying a field picture to be paired when creating a frame picture; a buffer interface that generates, when inter-predictive coding is performed by using, as a coding target picture, a frame picture created by interleaving two field pictures that are not encoded, a frame picture as a reference picture by interleaving the field pictures of the pair specified with reference to the reference pair information of a stored encoded field picture; and an encoder that generates, when the coding target picture is a frame picture, encoded data by performing inter-predictive coding on the coding target picture on a frame-picture-by-frame-picture basis by use of the reference picture. | 05-12-2016 |
20160142715 | IMAGE ENCODING APPARATUS, IMAGE DECODING APPARATUS AND IMAGE TRANSMISSION METHOD - According to an embodiment, an image encoding apparatus includes a background control information generator, a background image generator, and an image encoder. The background control information generator generates background control information based on an input image. The background control information is used for generating a first background image from at least one first image. The background image generator generates the first background image, based on the background control information and at least one first image. The image encoder encodes the input image using the first background image to generate encoded data. | 05-19-2016 |
20160142725 | Method and System for Selectively Breaking Prediction in Video Coding - Described are techniques in video coding and/or decoding that allow for selectively breaking prediction and/or in loop filtering across segment boundaries between different segments of a video picture. A high layer syntax element, such as a parameter set or a slice header, may contain one or more indications signalling to an encoder and/or decoder whether an associated prediction or loop filtering tool may be applied across the segment boundary. In response to such one or more indications, the encoder and/or decoder may then control the prediction or loop filtering tool accordingly. | 05-19-2016 |
20160142726 | ALTERNATING BLOCK CONSTRAINED DECISION MODE CODING - A method and apparatus for video coding using alternating block constrained decision mode coding is provided. Video coding using alternating block constrained decision mode coding may include identifying a current block of a current frame of an input video stream, generating an encoded block by encoding the current block using alternating block constrained decision mode coding, wherein alternating block constrained decision mode coding includes encoding the current block as a constrained decision mode coded block on a condition that a previously coded immediately adjacent block is an unconstrained decision mode coded block, including the encoded block in an output bitstream, and transmitting or storing the output bitstream. | 05-19-2016 |
20160142733 | Method of Coding and Decoding Images, Coding and Decoding Device and Computer Programs Corresponding Thereto - A method of coding at least one image comprising the steps of splitting the image into a plurality of blocks, of grouping said blocks into a predetermined number of subsets of blocks, of coding each of said subsets of blocks in parallel, the blocks of a subset considered being coded according to a predetermined sequential order of traversal. The coding step comprises, for a current block of a subset considered, the sub-step of predictive coding of said current block with respect to at least one previously coded and decoded block, and the sub-step of entropy coding of said current block on the basis of at least one probability of appearance of a symbol. | 05-19-2016 |
20160142734 | IMAGE CODING METHOD AND APPARATUS USING SPATIAL PREDICTIVE CODING OF CHROMINANCE AND IMAGE DECODING METHOD AND APPARATUS - A coding method including dividing pixels of a chrominance component of an input image into blocks having a predetermined size; selecting one among a direct current prediction method, a vertical prediction method, a horizontal prediction method, and a hybrid prediction method according to a user's input; generating a prediction value of each pixel in a current block to be predictively coded, using at least one pixel value among pixel values in an upper reference block adjacent to the current block and in a side reference block adjacent to the current block, according to the selected prediction method; generating a differential value between the prediction value and a corresponding real pixel value in the current block; and coding the differential value and information on the selected prediction method using a predetermined coding method. | 05-19-2016 |
20160142740 | DATA ENCODING AND DECODING - A video encoding method comprises partitioning each image of a video signal into an array of coding tree units; partitioning the array of coding tree units of each image into a portion pattern of rectangular portions for independent encoding such that the prediction dependencies of samples within a portion do not extend into any other portion and the entropy encoding parameters of one portion are independent of those of any other portion, the portion pattern being such that each row of coding tree units is partitioned into at least two of the portions; encoding the coding tree units within each portion using wavefront parallel processing in which, for each portion, successive rows of coding tree units within the portion are encoded so that encoding dependencies are not broken at row boundaries and encoding parameters are propagated from an intermediate position along each row to the start of the next row of coding tree units; and outputting the encoded coding tree units according to an order with respect to the array of coding tree units which is different to a raster order of coding tree units within successive respective portions. | 05-19-2016 |
20160150231 | LAYER-BASED VIDEO DECODING - A technique for decoding video signals includes receiving, by electronic decoding circuitry, a set of video data representing a two-dimensional array of pixels of a video signal. The set of video data includes (i) multiple residual layers, each residual layer providing an incomplete, lossily-compressed representation of the two-dimensional array of pixels (ii) multiple sets of prediction information, one for each of the residual layers, and (iii) a set of masks for directing reconstruction of the two-dimensional array of pixels. The method further includes generating multiple decompressed layers based on the residual layers and on the sets of prediction information for the respective residual layers and combining the decompressed layers, as directed by the set of masks, to generate a complete reconstruction of the two-dimensional array of pixels of the video signal. | 05-26-2016 |
20160150242 | Method of Background Residual Prediction for Video Coding - A method and apparatus for video encoding or decoding utilizing adaptive background residual prediction is disclosed. The present invention adaptively applies background residual prediction to a current block based on a selection decision. The coding block is split into one or more coding sub-blocks. A reference sub-block in a reference picture is located for a current coding sub-block of the current coding block according to a motion vector associated with the current coding block. A background reference sub-block in a background picture is located for the reference sub-block, where the background reference sub-block is at a first co-located location as the reference sub-block. The method then selects a first predictor or a second predictor to encode or decode the current sub-block based on a selection decision. The first predictor corresponds to the reference sub-block, and the second predictor is derived according to the reference sub-block and the background picture. | 05-26-2016 |
20160150243 | IMAGE CODING APPARATUS, IMAGE CODING METHOD, AND PROGRAM, AND IMAGE DECODING APPARATUS, IMAGE DECODING METHOD AND PROGRAM - The present invention is made to enable switching between lossless coding which prioritizes compatibility with a lossy coding process and lossless coding which prioritizes compression performance. | 05-26-2016 |
20160156907 | Method for Determining Block Partitioning Manner and Optimal Prediction Mode in Video Coding and Related Apparatus | 06-02-2016 |
20160156910 | METHOD AND APPARATUS FOR COEFFICIENT SCAN BASED ON PARTITION MODE OF PREDICTION UNIT | 06-02-2016 |
20160156912 | SCALABLE VIDEO ENCODING METHOD AND APPARATUS AND SCALABLE VIDEO DECODING METHOD AND APPARATUS USING UP-SAMPLING FILTER ACCOMPANIED BY CONVERSION OF BIT DEPTH AND COLOR FORMAT | 06-02-2016 |
20160156914 | LOW DELAY CONCEPT IN MULTI-LAYERED VIDEO CODING | 06-02-2016 |
20160156916 | METHOD FOR ENCODING DIGITAL VIDEO DATA | 06-02-2016 |
20160156920 | VIDEO ENCODING APPARATUS, VIDEO DECODING APPARATUS, VIDEO ENCODING METHOD, AND VIDEO DECODING METHOD | 06-02-2016 |
20160156921 | VIDEO ENCODING APPARATUS, VIDEO DECODING APPARATUS, VIDEO ENCODING METHOD, AND VIDEO DECODING METHOD | 06-02-2016 |
20160156922 | VIDEO ENCODING APPARATUS, VIDEO DECODING APPARATUS, VIDEO ENCODING METHOD, AND VIDEO DECODING METHOD | 06-02-2016 |
20160156923 | Tracking a Reference Picture on an Electronic Device | 06-02-2016 |
20160156927 | DECODER AND ENCODER AND METHODS FOR CODING OF A VIDEO SEQUENCE | 06-02-2016 |
20160156929 | IMAGE ENCODING DEVICE, IMAGE DECODING DEVICE, IMAGE ENCODING METHOD, AND IMAGE DECODING METHOD FOR GENERATING A PREDICTION IMAGE | 06-02-2016 |
20160156930 | IMAGE ENCODING DEVICE, IMAGE DECODING DEVICE, IMAGE ENCODING METHOD, AND IMAGE DECODING METHOD FOR GENERATING A PREDICTION IMAGE | 06-02-2016 |
20160156931 | IMAGE ENCODING DEVICE, IMAGE DECODING DEVICE, IMAGE ENCODING METHOD, AND IMAGE DECODING METHOD FOR GENERATING A PREDICTION IMAGE | 06-02-2016 |
20160156934 | ADAPTIVE TRANSFORM METHOD BASED ON IN-SCREEN PREDICTION AND APPARATUS USING THE METHOD | 06-02-2016 |
20160165245 | METHOD AND SYSTEM FOR TRANSCODING A DIGITAL VIDEO - The present disclosure relates to a method and a system for transcoding a digital video. The method and system includes a decoder, a hierarchical motion sampling and re-estimation engine, a resizing engine and an encoder. The decoder extracts a plurality of pre-determined decoder information pertaining to each macroblock of a plurality of macroblocks of each of a decoded frame of a plurality of decoded frames of the digital video. The decoder information includes syntax elements. The hierarchical motion sampling and re-estimation engine evaluates hierarchically the syntax elements pertaining to the each macroblock of the plurality of macroblocks of the plurality of decoded frames. The resizing engine resizes each of the macroblock of the plurality of macroblocks based on evaluated hierarchical syntax elements. The encoder encodes each of re-sized macroblock based on the evaluated hierarchical syntax elements. | 06-09-2016 |
20160165249 | Image Decoding Device and Image Coding Device - A reference picture information decoding unit ( | 06-09-2016 |
20160165257 | METHOD AND ENCODER FOR VIDEO ENCODING OF A SEQUENCE OF FRAMES - A method and encoder for video encoding a sequence of frames is provided. The method comprises: receiving a sequence of frames depicting a moving object, predicting a movement of the moving object in the sequence of frames between a first time point and a second time point; defining, on basis of the predicted movement of the moving object, a region of interest (ROI) in the frames which covers the moving object during its entire predicted movement between the first time point and the second time point; and encoding a first frame, corresponding to the first time point, in the ROI and one or more intermediate frames, corresponding to time points being intermediate to the first and the second time point, in at least a subset of the ROI using a common encoding quality pattern defining which encoding quality to use in which portion of the ROI. | 06-09-2016 |
20160165260 | SCALABLE VIDEO SIGNAL ENCODING/DECODING METHOD AND APPARATUS - A scalable video signal decoding method according to the present invention decodes a corresponding picture of a reference layer corresponding to a current picture of a current layer, generates an inter-layer reference picture by up-sampling the decoded corresponding picture, generates a reference picture list including a temporal reference picture and an inter-layer reference picture, and inter-predicting the current picture on the basis of the generated reference picture list. | 06-09-2016 |
20160165263 | SIMPLIFIED ADVANCED MOTION PREDICTION FOR 3D-HEVC - A video coder determines a candidate for inclusion in a candidate list for a current prediction unit (PU). The candidate is based on motion parameters of a plurality of sub-PUs of the current PU. If a reference block corresponding to a sub-PU is not coded using motion compensated prediction, the video coder sets the motion parameters of the sub-PU to default motion parameters. For each respective sub-PU from the plurality of sub-PUs, if a reference block for the respective sub-PU is not coded using motion compensated prediction, the motion parameters of the respective sub-PU are not set in response to a subsequent determination that a reference block for any later sub-PU in an order is coded using motion compensated prediction. | 06-09-2016 |
20160173813 | IMAGE TRANSMISSION SYSTEM AND IMAGE TRANSMISSION METHOD | 06-16-2016 |
20160173874 | METHOD AND APPARATUS FOR INTRA PREDICTION WITHIN DISPLAY SCREEN | 06-16-2016 |
20160173889 | METHOD AND APPARATUS FOR ENCODING/DECODING SCALABLE VIDEO SIGNAL | 06-16-2016 |
20160173907 | LM Mode with Uniform Bit-Width Multipliers | 06-16-2016 |
20160182904 | IMAGE ENCODING METHOD, IMAGE ENCODING APPARATUS, AND IMAGE ENCODING PROGRAM | 06-23-2016 |
20160182916 | IMAGE ENCODING AND DECODING METHOD SUPPORTING PLURALITY OF LAYERS AND APPARATUS USING SAME | 06-23-2016 |
20160191926 | SIGNALING INDICATIONS AND CONSTRAINTS - This invention introduces modification to a syntax signaled in slice segment header related to inter-layer prediction. A syntax optimization is proposed where if syntax element NumActiveRefLayerPics is equal to syntax element NumDirectRefLayers[nuh_layer_id] then the inter_layer_pred_idc[i] syntax elements are not signaled. In this case the value of inter_layer_pred_idc[i] syntax elements is inferred based on other syntax elements already signaled. | 06-30-2016 |
20160191931 | APPARATUS, A METHOD AND A COMPUTER PROGRAM FOR VIDEO CODING AND DECODING - There is provided methods, apparatuses and computer program products for video coding and decoding. A first part of a first coded video representation is decoded, and information on decoding a second coded video representation is received and parsed. The coded second representation differs from the first coded video representation in chroma format, sample bit depth, color gamut and/or spatial resolution, and the information indicates if the second coded video representation may be decoded using processed decoded pictures of the first coded video representation as reference pictures. If the information indicates that the second coded video representation may be decoded using processed decoded pictures of the first coded video representation as a prediction reference, decoded picture(s) of the first part is/are processed into processed decoded picture(s) by resampling and/or sample value scaling; and decoding a second part of a second video representation using said processed decoded picture(s) as reference pictures. | 06-30-2016 |
20160191938 | MARKING PICTURES FOR INTER-LAYER PREDICTION - A method for video coding is described. Signaling of a maximum number of sub-layers for inter-layer prediction is obtained. A sub-layer non-reference picture is also obtained. It is determined whether a value of a temporal identifier of the sub-layer non-reference picture is greater than the maximum number of sub-layers for inter-layer prediction minus 1. The sub-layer non-reference picture is marked as “unused for reference” if the value of the temporal identifier of the sub-layer non-reference picture is greater than the maximum number of sub-layers for inter-layer prediction minus 1. In some cases a sub-layer non-reference picture is also obtained. It is determined whether a value of a temporal identifier of the sub-layer non-reference picture is greater than the maximum number of sub-layers for inter-layer prediction. The sub-layer non-reference picture is marked as “unused for reference” if the value of the temporal identifier of the sub-layer non-reference picture is greater than the maximum number of sub-layers for inter-layer prediction. | 06-30-2016 |
20160191950 | Reference Picture List Management Syntax for Multiple View Video Coding - A picture reference list ordering process is defined for a multiview coder for coding moving pictures, where the picture list has the coding order of reference pictures used to code a picture specified in relationship to whether a picture to be coded is associated with a view. The ordering of the picture list will therefore change the coding order of the reference pictures in the picture reference list depending on the temporal relationships the reference pictures have with the picture to be coded and views associated with the reference picture. | 06-30-2016 |
20160191951 | SECONDARY BOUNDARY FILTERING FOR VIDEO CODING - In one example, a video coding device is configured to intra-predict a block of video data, using values of pixels along a primary boundary of the block, to form a predicted block, determine whether to filter the predicted block using data of a secondary boundary of the block, and filter the predicted block using data of the secondary boundary in response to determining to filter the predicted block. The video coding device may determine whether to filter the predicted block based on a comparison of a Laplacian value or a gradient difference value to a threshold. The determination of whether to filter the predicted block may be based at least in part on a boundary relationship, e.g., the relationship of one boundary to another, or of a boundary to pixel values of the predicted block. | 06-30-2016 |
20160198167 | SCALABLE VIDEO SIGNAL ENCODING/DECODING METHOD AND APPARATUS | 07-07-2016 |
20160198169 | SCALABLE VIDEO SIGNAL ENCODING/DECODING METHOD AND APPARATUS | 07-07-2016 |
20160198175 | IMAGE ENCODING DEVICE, IMAGE ENCODING METHOD AND PROGRAM, IMAGE DECODING DEVICE, AND IMAGE DECODING METHOD AND PROGRAM | 07-07-2016 |
20160198176 | VIDEO ENCODING APPARATUS, VIDEO DECODING APPARATUS, VIDEO ENCODING METHOD, AND VIDEO DECODING METHOD | 07-07-2016 |
20160198177 | VIDEO ENCODING APPARATUS, VIDEO DECODING APPARATUS, VIDEO ENCODING METHOD, AND VIDEO DECODING METHOD | 07-07-2016 |
20160198178 | VIDEO ENCODING APPARATUS, VIDEO DECODING APPARATUS, VIDEO ENCODING METHOD, AND VIDEO DECODING METHOD | 07-07-2016 |
20160198179 | VIDEO ENCODING APPARATUS, VIDEO DECODING APPARATUS, VIDEO ENCODING METHOD, AND VIDEO DECODING METHOD | 07-07-2016 |
20160198180 | IMAGE ENCODING APPARATUS | 07-07-2016 |
20160198181 | IMAGE ENCODING APPARATUS | 07-07-2016 |
20160198182 | IMAGE ENCODING APPARATUS | 07-07-2016 |
20160198183 | IMAGE ENCODING APPARATUS | 07-07-2016 |
20160198184 | IMAGE ENCODING APPARATUS | 07-07-2016 |
20160198185 | IMAGE DECODING APPARATUS | 07-07-2016 |
20160198186 | IMAGE DECODING APPARATUS | 07-07-2016 |
20160198187 | IMAGE DECODING APPARATUS | 07-07-2016 |
20160198188 | IMAGE DECODING APPARATUS | 07-07-2016 |
20160198189 | IMAGE ENCODING/DECODING METHOD AND APPARATUS FOR SAME | 07-07-2016 |
20160198190 | LUMA-BASED CHROMA INTRA-PREDICTION FOR VIDEO CODING | 07-07-2016 |
20160198191 | IMAGE ENCODING/DECODING METHOD AND APPARATUS FOR SAME | 07-07-2016 |
20160198192 | Method for Intra Prediction and Device Therefor | 07-07-2016 |
20160198195 | USING MOTION COMPENSATED TEMPORAL FILTER (MCTF) STATISTICS FOR SCENE CHANGE DETECTION WHEN A FADE, DISSOLVE OR CUT OCCURS | 07-07-2016 |
20160205409 | SCREEN IMAGE ENCODING METHOD AND APPARATUS THEREFOR, AND SCREEN IMAGE DECODING METHOD AND APPARATUS THEREFOR | 07-14-2016 |
20160205414 | VIDEO TRANSMISSION SYSTEM, CODING APPARATUS, AND MOVING PICTURE COMPRESSION METHOD | 07-14-2016 |
20160255343 | METHOD AND DEVICE FOR ENCODING/DECODING MULTI-LAYER VIDEO SIGNAL | 09-01-2016 |
20160255354 | IMAGE DECODER, IMAGE ENCODER, AND ENCODED DATA CONVERTER | 09-01-2016 |
20160255374 | ENTROPY DECODING METHOD, AND DECODING APPARATUS USING SAME | 09-01-2016 |
20160381343 | Systems and Methods for Multi-Layered Frame-Compatible Video Delivery - Multi-layered frame-compatible video delivery is described. Multi-layered encoding and decoding methods, comprising a base layer and at least one enhancement layer with reference processing, are provided. In addition, multi-layered encoding and decoding methods with inter-layer dependencies are described. Encoding and decoding methods that are capable of frame-compatible 3D video delivery are also described. | 12-29-2016 |
20160381371 | Image Processing Apparatus and Method - The present disclosure relates to an image processing apparatus and a method therefor capable of reducing the amount of memory required for intra-frame prediction. | 12-29-2016 |
20160381373 | REFERENCE PICTURE LIST CONSTRUCTION IN INTRA BLOCK COPY MODE - An apparatus configured to construct a reference picture list includes a memory and one or more processors in communication with the memory. The memory is configured to store one or more reference pictures. The one or more processors are configured to determine (i) a first number representative of a total number of reference pictures available for prediction in at least one of inter mode or intra block copy mode and (ii) a second number representative of a total number of reference pictures to be included in the reference picture list, and in response to a determination that the second number is greater than or equal to the first number, refrain from replacing a reference picture in the reference picture list with a current picture to be predicted. The one or more processors may encode or decode the current picture based on the reference picture list. | 12-29-2016 |
20160381385 | A METHOD, AN APPARATUS AND A COMPUTER PROGRAM PRODUCT FOR VIDEO CODING AND DECODING - There are disclosed various methods, apparatuses and computer program products for video encoding and decoding. In some embodiments information on bit-depth of a reference block of an image on a first layer and bit-depth of a current block of an image on a second layer is obtained. The obtained information is used to select one or more resampling filter parameters for filtering at least a part of a reference layer image to be used in inter-layer prediction. There are also disclosed corresponding methods, apparatuses and computer program products for video encoding and decoding. | 12-29-2016 |
20160381389 | 3D-HEVC depth video information hiding method based on single-depth intra mode - The present invention disclosed a 3D-HEVC depth video information hiding method based on single-depth intra mode, which comprises information embedment part and information extraction part. During information embedment, if the pixels in the candidate list are equal using the encrypt information to modulate the index of the pixel and completes the embedment. If the pixels are different, judging the neighboring CU of the CU whose depth is 2 or 3 and modulating the index of the pixel to complete embedment of the hidden information. The advantage of the present invention is high security, low calculation complexity and small influence on data rate. | 12-29-2016 |
20160381393 | IMAGE DECODING APPARATUS, IMAGE DECODING METHOD - A layer incapable of being decoded on a bit stream which is generated through a bit stream extraction process from a bit stream including a prescribed layer set and which only includes a layer set made up of a subset of the prescribed layer set, occurs. An aspect of the present disclosure specifies a bit stream constraint pertaining to a parameter set, and a bit stream extraction process. | 12-29-2016 |
20170237978 | METHOD AND APPARATUS FOR SETTING REFERENCE PICTURE INDEX OF TEMPORAL MERGING CANDIDATE | 08-17-2017 |
20170237979 | METHOD AND APPARATUS FOR SETTING REFERENCE PICTURE INDEX OF TEMPORAL MERGING CANDIDATE | 08-17-2017 |
20170237981 | PREDICTING FILTER COEFFICIENTS FROM FIXED FILTERS FOR VIDEO CODING | 08-17-2017 |
20170237982 | MERGING FILTERS FOR MULTIPLE CLASSES OF BLOCKS FOR VIDEO CODING | 08-17-2017 |
20170237985 | METHOD AND APPARATUS FOR CODING VIDEO AND METHOD AND APPARATUS FOR DECODING VIDEO ACCOMPANIED WITH ARITHMETIC CODING | 08-17-2017 |
20170237989 | IMAGE DECODER, IMAGE DECODING METHOD, IMAGE ENCODER, AND IMAGE ENCODE METHOD | 08-17-2017 |
20170237993 | METHOD AND APPARATUS FOR SETTING REFERENCE PICTURE INDEX OF TEMPORAL MERGING CANDIDATE | 08-17-2017 |
20170238001 | RULES FOR INTRA-PICTURE PREDICTION MODES WHEN WAVEFRONT PARALLEL PROCESSING IS ENABLED | 08-17-2017 |
20170238004 | METHOD FOR CODING AND DECODING SCALABLE VIDEO AND APPARATUS USING SAME | 08-17-2017 |
20170238008 | MOVING PICTURE ENCODING DEVICE, MOVING PICTURE ENCODING METHOD AND MOVING PICTURE ENCODING PROGRAM, AND MOVING PICTURE DECODING DEVICE, MOVING PICTURE DECODING METHOD AND MOVING PICTURE DECODING PROGRAM | 08-17-2017 |
20170238009 | MOVING PICTURE ENCODING DEVICE, MOVING PICTURE ENCODING METHOD AND MOVING PICTURE ENCODING PROGRAM, AND MOVING PICTURE DECODING DEVICE, MOVING PICTURE DECODING METHOD AND MOVING PICTURE DECODING PROGRAM | 08-17-2017 |
20170238011 | Methods and Devices For Encoding and Decoding Video Pictures | 08-17-2017 |
20170238012 | METHOD AND APPARATUS FOR ENCODING AND DECODING IMAGE THROUGH INTRA PREDICTION | 08-17-2017 |
20170238013 | MULTI-PASS NON-SEPARABLE TRANSFORMS FOR VIDEO CODING | 08-17-2017 |
20170238014 | EFFICIENT PARAMETER STORAGE FOR COMPACT MULTI-PASS TRANFORMS | 08-17-2017 |
20170238015 | SIGNALING SELECTED DIRECTIONAL TRANSFORM FOR VIDEO CODING | 08-17-2017 |
20180027233 | EFFECTIVE WEDGELET PARTITION CODING | 01-25-2018 |
20180027236 | METHOD AND DEVICE FOR ENCODING/DECODING VIDEO SIGNAL BY USING ADAPTIVE SCAN ORDER | 01-25-2018 |
20180027240 | VIDEO ENCODING APPARATUS FOR ENCODING VIDEO FRAME SEGMENT THAT IS PARTITIONED INTO MULTIPLE COLUMN TILES AND ASSOCIATED VIDEO ENCODING METHOD | 01-25-2018 |
20190149816 | DC COEFFICIENT SIGN CODING SCHEME | 05-16-2019 |
20190149818 | VIDEO DATA ENCODING AND DECODING METHOD, DEVICE, AND SYSTEM, AND STORAGE MEDIUM | 05-16-2019 |
20190149827 | IMAGE-PROCESSING APPARATUS AND LOSSLESS IMAGE COMPRESSION METHOD USING INTRA-FRAME PREDICTION | 05-16-2019 |
20190149828 | IMAGE ENCODING/DECODING METHOD AND APPARATUS USING INTRA-SCREEN PREDICTION | 05-16-2019 |
20190149842 | METHOD AND APPARATUS FOR INTRA MODE CODING | 05-16-2019 |
20220141466 | UNIFICATION OF CONTEXT-CODED BINS (CCB) COUNT METHOD - In one implementation, the CCB counting methods are unified between the transform residual coding process and Transform Skip (TS) residual coding process. In one example, in TS residual coding, the CCB counting excludes the coeff_sign_flag so that syntax used for CCB count is unified for the two residual coding processes. In addition, a separate maximum number of context coded bins can be specified and used for coeff_sign_flag only. In another example, in TS residual coding, the maximum number of CCB count is reduced from TB_size*2 for a TB to TB_size*1.75, or more generally both the maximum CCB counts of the transform residual coding and TS residual coding are set to an identical value, so that the maximum CCB count is unified for the two residual coding processes. | 05-05-2022 |
20220141477 | IMAGE PROCESSING APPARATUS AND IMAGE PROCESSING METHOD - A line buffer number calculation unit | 05-05-2022 |
20220141485 | INTRA BLOCK CODING-BASED VIDEO OR IMAGE CODING - According to the present disclosure of the present document, prediction can be performed on the basis of information related to the maximum number of block vector candidates included in a merge candidate list for the IBC merge mode, and thus information for IBC, which is distinguished from information used in inter prediction, can be signaled separately, and the efficiency of screen content coding (SCC) can be increased. | 05-05-2022 |
20220141488 | SUB-PICTURE BITSTREAM EXTRACTION AND REPOSITION - Systems and methods described herein employ a high-level syntax design that supports a sub-picture extraction and reposition process. An input video may be encoded into multiple representations, each representation may be represented as a layer. A layer picture may be partitioned into multiple sub-pictures. Each sub-picture may have its own tile partitioning, resolution, color format and bit depth. Each sub-picture is encoded independently from other sub-pictures of the same layer, but it may be inter-predicted from the corresponding sub-pictures from its dependent layers. Each sub-picture may refer to a sub-picture parameter set where the sub-picture properties such as resolution and coordinate is signaled. Each sub-picture parameter set may refer to a PPS where the resolution of the entire picture is signaled. | 05-05-2022 |