Patent application number | Description | Published |
20080219576 | Method and apparatus for encoding/decoding image - Provided are a method and apparatus for encoding/decoding an image. The method of encoding an image includes predicting pixel values in a first pixel group from among pixel groups of a block of a current image, using pixel values in a second pixel group of the block, and encoding the current image using the predicted pixel values. Accordingly, prediction efficiency can be increased by performing intra prediction using pixels in a current block. | 09-11-2008 |
20090003435 | Method, medium, and apparatus for encoding and/or decoding video data - A method, medium, and apparatus for encoding and/or decoding video by generating a scalable bitstream compatible with at least two video formats generating an enhancement layer identifier, generating a base layer bitstream by encoding a chrominance component of a low-frequency band and a luminance component that are included in video, and generating an enhancement layer bitstream by encoding a chrominance component of the remaining frequency band other than the low-frequency band that is included in the video. | 01-01-2009 |
20090003437 | 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 supporting at least two bit-depths with forward compatibility, wherein the scalable bitstream comprises a base layer bitstream including a base quantization level and a base quantization parameter corresponding to a base bit-depth, and an enhancement layer bitstream including residue between an extended quantization level and a compensated quantization level that is predicted from the base quantization level, and a refined quantization parameter for refining the difference between an extended bit-depth and the base bit-depth. | 01-01-2009 |
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 |
20090097549 | 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 with a base layer bitstream and an enhancement layer bitstream in order to provide forward compatibility, the scalable bitstream comprising a base layer bitstream including a base quantized level and a base quantization parameter corresponding to a base bit-depth, and an enhancement layer bitstream including a residue between an extended quantized level and a compensated quantized level that is predicted from the base quantized level, and additional quantization information for refining the difference between an extended bit-depth and the base bit-depth, wherein a process for improving image quality is applied to at least one of the base layer and the enhancement layer. | 04-16-2009 |
20090097573 | Scalable video coding method and apparatus and scalable video decoding method and apparatus - Provided are a scalable video coding method and apparatus, and a scalable video decoding method and apparatus. The coding method generates a base layer bitstream of video by using one of a plurality of codecs, determines whether the used codec supports enhancement layer coding, decodes the base layer bitstream according to the result of the determination in order to extract coded information used for the generation of the base layer bitstream, and generates an enhancement layer bitstream of the original video based on the extracted information. Accordingly, it is possible to provide high-quality video and increase coding efficiency while using the various existing codecs. | 04-16-2009 |
20090110054 | 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 with a base layer bitstream and an enhancement layer bitstream, in order to provide forward compatibility, is described. The method includes reconstructing an image having an extended bit-depth and an extended video format into an image having a base bit-depth and a base video format, encoding the reconstructed image, and as a result of the encoding of the image having the base bit-depth and the base video format, generating a base layer bitstream, and reconstructing the image having the extended bit-depth and extended video format into an image having the extended bit-depth and the base video format, and by using the result of the encoding of the image having the base bit-depth and the base video format, encoding the image having the extended bit-depth and the base video format, and generating an enhancement layer bitstream with a result of the encoding of the image having the extended bit-depth and the base video format and additional data required for the extended video format. | 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 |
20090129466 | Method, medium, and apparatus efficiently encoding and decoding moving image using image resolution adjustment - A method, medium, and apparatus encoding and/or decoding a moving image. The method of decoding a moving image includes increasing a resolution of a compression image corresponding to a reference image of a current image from among compression images stored in a memory in order to reconstruct the reference image, generating a reconstruction image of the current image by decoding a bitstream by using the reconstructed reference image, and reducing a resolution of the generated reconstruction image in order to compress the reconstruction image and storing the compressed reconstruction image in the memory. | 05-21-2009 |
20090148054 | Method, medium and apparatus encoding/decoding image hierarchically - A method, medium, and apparatus hierarchically encoding or decoding an image format. In this method, a basic image is generated by down-sampling an original image. A basic layer bitstream is generated by encoding the basic image. A restoration image of the basic image is generated and up-sampled. Enhancement layer bitstreams are generated by encoding a residue image corresponding to a difference between the original image and the up-sampled restoration image by using different quantization parameters. | 06-11-2009 |
20090185621 | Video encoding/decoding apparatus and method - Provided are a resolution varying video encoding/decoding apparatus and method are provided. The video encoding apparatus comprises a resolution varying encoder to perform an encoding operation using motion estimation and compensation on a current image having a first resolution and a current image having a second resolution according to a resolution control signal to generate a bitstream, and a controller to generate the resolution control signal for varying a resolution to the first resolution or the second resolution at a predetermined interval. The video decoding apparatus comprises an analyzer to analyze a bitstream composed of encoded data having a first resolution or a second resolution and to generate a resolution control signal corresponding to a resolution flag included in the bitstream, and a resolution varying decoder to perform a decoding operation using motion compensation on encoded data having the first resolution and encoded data having the second resolution according to the resolution control signal to generate a reconstructed image. | 07-23-2009 |
20090190843 | Image encoding apparatus and image decoding apparatus - Provided are an image encoding apparatus and an image decoding apparatus. The image encoding apparatus includes a compression unit compressing a reference image by reducing a resolution of the reference image in a resolution adjustment mode determined from among at least two resolution adjustment modes according to a distribution of values of pixels of the reference image, and providing the compressed reference image to a memory, a reconstruction unit reconstructing the reference image by increasing a resolution of the compressed reference image stored in the memory to an original resolution, a predictive encoding unit performing predictive encoding on a current image by using the reconstructed reference image, and a predictive decoding unit generating the reference image by performing decoding on the predictive encoded current image, and providing the generated reference image to the compression unit. | 07-30-2009 |
20090196351 | Video encoding/decoding apparatus and method for color image - A video encoding/decoding apparatus and method for color images include a first motion prediction unit that generates a first prediction residue image of an input image on a basis of a first motion prediction result of the input image. An image information detection unit sets a predetermined color component of an R-G-B image to a reference color component and determines whether the input image is a Y-Cb-Cr image or an R-G-B image and whether a color component is the reference color component. A second motion prediction unit performs motion prediction for the first prediction residue image and generates a second prediction residue image if the input image is the R-G-B image and the color component of the input image is not the reference color component. | 08-06-2009 |
20090196515 | Method and apparatus to encode/decode image efficiently - A method of and apparatus to efficiently encode and/or decode an image are provided. The method of encoding an image includes: calculating a motion vector of a main reference image by estimating a motion of a current image with reference to the main reference image; deriving a motion vector of at least one auxiliary reference image from this motion vector; generating a prediction image of the current image by using a motion vector of the main reference image or the motion vector of the at least one auxiliary reference image; and encoding a residue image between the current image and the prediction image. | 08-06-2009 |
20090232198 | Method and apparatus of coding/decoding image - An apparatus and a method of coding/decoding an image are provided. The apparatus includes: a low resolution image coding unit that codes a low resolution image corresponding to an input image using motion estimation and compensation; and a residual image coding unit that performs intra mode coding with respect to a residual image which indicates a difference between a reconstructed image of the coded low resolution image and the input image by considering temporal correlation between neighboring residual images. | 09-17-2009 |
20090238482 | Method and apparatus for field picture coding and decoding - A field picture coding/decoding apparatus and method is provided. The field picture coding method includes selecting a reference field with respect to an input image, generating a predictive image by deinterlacing with respect to the selected reference field, and performing predictive coding with respect to the input image using the predictive image. | 09-24-2009 |
20090279610 | Method and apparatus for encoding/decoding with interlace scanning based motion vector transformation - An interlace scanning image encoding or decoding method. The interlace scanning image encoding method includes estimating motion of a present field corresponding to a portion of a present image based on a main reference field and calculating a motion vector of the main reference field, selecting a subsidiary reference field related to the main reference field, deriving a motion vector of the subsidiary reference field from the motion vector of the main reference field, generating a prediction field of the present field using any one of the motion vector of the main reference field and the motion vector of the subsidiary reference field, and encoding a residual field between the present field and the prediction field. | 11-12-2009 |
20090279614 | Apparatus and method for managing reference frame buffer in layered video coding - An apparatus for encoding or decoding an image by storing and managing a reference frame used to encode or decode an encoding target image frame. To encode image frames classified into a plurality of layers, the apparatus may include a layer identification unit identifying a layer that includes a first encoding target frame, a frame storage unit storing at least one storage frame associated with the first encoding target frame, a reference frame selector selecting a reference frame from the at least one storage frame, based on the identified layer, and a frame encoder encoding the first encoding target frame by referring to the selected reference frame, wherein the frame storage unit stores the first encoding target frame as a storage frame associated with a second encoding target frame. | 11-12-2009 |
20100226586 | Image coding and decoding method and apparatus considering human visual characteristics - An image coding method and apparatus considering human visual characteristics are provided. The image coding method comprises (a) modeling image quality distribution of an input image in units of scenes such that the quality of an image input in units of scenes is gradually lowered from a region of interest to a background region, (b) determining a quantization parameter of each region constituting one scene according to the result of modeling of image quality distribution, (c) quantizing image data in accordance with the quantization parameter, and (d) coding entropy of the quantized image data. | 09-09-2010 |
20100329361 | APPARATUS AND METHOD FOR IN-LOOP FILTERING OF IMAGE DATA AND APPARATUS FOR ENCODING/DECODING IMAGE DATA USING THE SAME - An in-loop filtering apparatus for eliminating an error of deblocking-filtered image data in an encoder of image data, the apparatus including: an in-loop filter generator which generates in-loop filters using different filter coefficients for a block boundary and a block inside of the deblocking-filtered image; an in-loop filter applier which performs selective filtering on at least one of the block boundary and the block inside using the generated in-loop filters; and an in-loop filter information generator which generates in-loop filter information including at least one of coefficients of the generated in-loop filters, information indicating an area to which in-loop filtering is applied between the block boundary and the block inside, a size of a block to which in-loop filtering is applied, and a flag indicating whether to use an in-loop filter generated for a current frame or an in-loop filter generated for a previous frame. | 12-30-2010 |
20100329362 | VIDEO ENCODING AND DECODING APPARATUS AND METHOD USING ADAPTIVE IN-LOOP FILTER - An in-loop filtering method and apparatus for video encoding, the in-loop filtering method including: determining a type of a boundary of an image block to be filtered by using context information of the image block; adaptively creating a filter for filtering the boundary of the image block according to the determined type; selecting a filter for filtering the image block between the created filter and a previously stored filter; and filtering the image block by using the selected filter. | 12-30-2010 |
20110007806 | SPATIAL PREDICTION METHOD AND APPARATUS IN LAYERED VIDEO CODING - A spatial prediction method for coding a residual image in layered video coding. The spatial prediction method includes selecting at least one of a default mode, a horizontal mode and a vertical mode as a spatial prediction mode, taking into account an activity of at least one adjacent block located adjacent to a first block among blocks included in the residual image; and coding differences between pixels of the first block and pixels of a prediction bock constructed by one of the selected at least one or more spatial prediction modes. The at least one adjacent block includes a first adjacent block located on the left of the first block and a second adjacent block located on the top of the first block. | 01-13-2011 |
20110012994 | METHOD AND APPARATUS FOR MULTI-VIEW VIDEO CODING AND DECODING - A multi-view video coding method and apparatus and a multi-view video decoding method and apparatus for providing a multi-view video service are provided. The multi-view video coding method includes: coding a base layer picture using an arbitrary video codec; generating a prediction picture using at least one of a reconstructed base layer picture and a reconstructed layer picture having a different view from that of the base layer picture; and residual-coding a layer picture having the different view using the prediction picture. | 01-20-2011 |
20110032990 | APPARATUS AND METHOD FOR DEBLOCKING FILTERING IMAGE DATA AND VIDEO DECODING APPARATUS AND METHOD USING THE SAME - A deblocking filtering apparatus and method for removing block distortion of a decoded image, and a video decoding apparatus and method using the same. The deblocking filtering method includes extracting parameter information for a plurality of unit blocks in a macro block, from a header of an input current frame, determining whether to perform deblocking filtering, based on the extracted parameter information, and performing deblocking filtering on the macro block according to the determination result. | 02-10-2011 |
20110211642 | MOVING PICTURE ENCODING/DECODING APPARATUS AND METHOD FOR PROCESSING OF MOVING PICTURE DIVIDED IN UNITS OF SLICES - A moving picture encoding/decoding apparatus and method for processing a moving picture, which is divided in units of slices are provided. The encoding method includes: dividing a moving picture in units of slices when the moving picture is received; determining an encoding order of moving pictures divided in units of slices; and generating a bitstream by encoding moving pictures, which are divided in units of slices, according to a corresponding order when the encoding order had been determined. | 09-01-2011 |
20110216821 | METHOD AND APPARATUS FOR ADAPTIVE STREAMING USING SCALABLE VIDEO CODING SCHEME - A method which provides a video streaming service, and the method includes: generating layer data for a corresponding video in accordance with a layer coding scheme using residual data; receiving bit rate information including a bit rate decodable in a terminal from the terminal; selecting a layer necessary for a decoding of a video corresponding to the decodable bit rate from among the generated layer data; and transmitting layer information and layer data corresponding to the selected layer to the terminal. | 09-08-2011 |
20110235710 | 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. | 09-29-2011 |
20110235930 | 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. | 09-29-2011 |
20110243222 | METHOD AND APPARATUS FOR ENCODING VIDEO BY USING ADAPTIVE PREDICTION FILTERING, METHOD AND APPARATUS FOR DECODING VIDEO BY USING ADAPTIVE PREDICTION FILTERING - Encoding and decoding a video using adaptive prediction filtering by encoding prediction filter information in a video bitstream and decoding the video bitstream using the prediction filter information. | 10-06-2011 |
20110274180 | METHOD AND APPARATUS FOR TRANSMITTING AND RECEIVING LAYERED CODED VIDEO - Transmitting and receiving a layered coded video, in which a picture of a base layer and a picture of at least one enhancement layer are separately encoded, the encoded pictures of the base layer and the encoded pictures of the at least one enhancement layer are arranged on a slice basis, the arranged pictures are packetized by adding a header to the rearranged pictures, and the packets are transmitted as a bit stream. | 11-10-2011 |
20120033728 | METHOD AND APPARATUS FOR ENCODING AND DECODING IMAGES BY ADAPTIVELY USING AN INTERPOLATION FILTER - The present invention relates to a method and to an apparatus for encoding and decoding images by adaptively using an interpolation filter in consideration of the characteristics of input images. The apparatus of the present invention comprises a prediction block-generating unit including a selector for adaptively selecting an interpolation filter for generating a prediction block in consideration of the context information of an input image block, a filter bank in which groups of interpolation filters are stored in correspondence with the context information, and a specific interpolation filter which is selected from the filter bank in accordance with the control of the selector, and which interpolates a reference image block associated with the input image block. | 02-09-2012 |
20120044999 | METHOD AND APPARATUS FOR ENCODING AND DECODING MULTILAYER VIDEOS - Provided are methods and apparatuses for encoding and decoding a bit stream in a multilayer video system in which a base layer and a higher layer use different codecs. The decoding method includes: receiving a bit stream including a higher-layer stream and a base-layer stream, the higher-layer stream including at least one of an identifier for identifying a codec for the higher-layer stream, information indicating features of the higher-layer stream, and information indicating a relationship between the higher-layer stream and a lower-layer stream; demultiplexing the higher-layer stream and the base-layer stream from the bit stream; decoding the base-layer stream; and decoding the higher-layer stream based on the identifier and the information indicating the features of the higher-layer stream. | 02-23-2012 |
20120063692 | APPARATUS AND METHOD FOR MULTILAYER PICTURE ENCODING/DECODING - Provided is a multilayer picture encoding/decoding apparatus and method for reducing a dynamic range of residual pictures occurring in enhancement layers. The multilayer picture encoding method includes performing format down-conversion on an input picture, and generating a lower layer bitstream by encoding the format down-converted input picture; performing format up-conversion by adaptively or selectively applying a 1-dimensional (1-D) prediction filter to a picture of the lower layer depending on whether a lower layer prediction flag is set or not; and calculating a residual picture between the input picture and the format up-converted picture, and generating an enhancement bitstream by encoding the calculated residual picture. | 03-15-2012 |
20120093425 | ENTROPY ENCODING/DECODING METHOD AND APPARATUS FOR HIERARCHICAL IMAGE PROCESSING AND SYMBOL ENCODING/DECODING APPARATUS FOR THE SAME - Entropy decoding, after encoding, includes performing symbol decoding on a bitstream of a received residual picture in units of two, three, or four symbols according to a context model which is set in the two, three, or four symbol units, and ordering the decoded coefficients of the residual picture in their original order in the frequency domain. Symbol and level decoding may be performed together. A unique symbol value may be used. | 04-19-2012 |
20120170661 | SCALABLE VIDEO CODING METHOD AND APPARATUS AND SCALABLE VIDEO DECODING METHOD AND APPARATUS - Provided are a scalable video coding method and apparatus, and a scalable video decoding method and apparatus. The coding method generates a base layer bitstream of video by using one of a plurality of codecs, determines whether the used codec supports enhancement layer coding, decodes the base layer bitstream according to the result of the determination in order to extract coded information used for the generation of the base layer bitstream, and generates an enhancement layer bitstream of the original video based on the extracted information. Accordingly, it is possible to provide high-quality video and increase coding efficiency while using the various existing codecs. | 07-05-2012 |
20120213282 | METHOD AND APPARATUS FOR ENCODING AND DECODING MULTI-VIEW VIDEO - A method and apparatus for encoding and decoding a multi-view video by encoding and decoding a current block the multi-view image using a reference frame having a view different than a view of a current frame of the current block. | 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 |
20120268558 | METHOD AND APPARATUS FOR VIDEO ENCODING USING INTER LAYER PREDICTION WITH PRE-FILTERING, AND METHOD AND APPARATUS FOR VIDEO DECODING USING INTER LAYER PREDICTION WITH POST-FILTERING - Disclosed are a video encoding method and apparatus for encoding an image synthesized from at least one image, and a video decoding method and apparatus for decoding an image synthesized from at least one image. The video encoding method includes: generating a base layer bitstream by encoding first components of the at least one image; pre-filtering second components of the at least one image using a correlation between the first components and the second components; and generating an enhancement layer bitstream by encoding the pre-filtered second components with reference to the first components. | 10-25-2012 |
20120269261 | METHODS AND APPARATUSES FOR ENCODING AND DECODING IMAGE USING ADAPTIVE FILTERING - Provided are methods and apparatuses for encoding and decoding an image by using adaptive filtering. The method of encoding an image by using adaptive filtering includes: determining a filter to be applied to a reference frame used for prediction encoding of a current block to be encoded, by adaptively changing a size and filter coefficients of the filter; filtering the reference frame by using the determined filter; prediction encoding the current block by using the filtered reference frame; and outputting data of the prediction encoded current block and information about the filter. | 10-25-2012 |
20120269267 | METHOD AND APPARATUS FOR UNIFIED SCALABLE VIDEO ENCODING FOR MULTI-VIEW VIDEO AND METHOD AND APPARATUS FOR UNIFIED SCALABLE VIDEO DECODING FOR MULTI-VIEW VIDEO - Methods for scalable video encoding and decoding for a multi-view video and apparatuses for scalable video encoding and decoding which implement the methods are provided. At least one root image and other remaining images of an image sequence of a video are classified into a plurality of layers. At least one reference image relating to a current image of the image sequence is generated by using a parent image of the current image based on a reference image conversion technique for scalable prediction encoding. Prediction encoding may be performed with respect to the current image by using the at least one reference image. | 10-25-2012 |
20120269269 | METHOD AND APPARATUS FOR ENCODING AND DECODING MOTION VECTOR OF MULTI-VIEW VIDEO - Provided are methods and apparatuses for encoding and decoding a motion vector in a multi-view view image sequence. A method of encoding includes: determining a view direction motion vector of a current block by performing motion prediction on the current block with reference to a first frame having a second view that is different from a first view of the current block; determining view direction motion vector predictor candidates using a view direction motion vector of an adjacent block that refers to a reference frame having a different view from the first view, and a view direction motion vector of a corresponding region included in a second reference frame having the first view and a different picture order count than the current frame; and encoding a difference value between the view direction motion vector of the current block and a selected view direction motion vector predictor, and mode information. | 10-25-2012 |
20120275696 | METHOD AND APPARATUS FOR ENCODING AND DECODING IMAGE - An apparatus and method for encoding and decoding an image are provided. The image decoding method includes (a) decoding luma blocks according to a predetermined decoding mode of each of the luma blocks, and (b) decoding chroma blocks according to the predetermined decoding mode of each of the luma blocks. | 11-01-2012 |
20120275716 | METHOD AND APPARATUS FOR ENCODING AND DECODING IMAGE - An apparatus and method for encoding and decoding an image are provided. The image decoding method includes decoding luma blocks according to a predetermined decoding mode of each of the luma blocks, and decoding chroma blocks according to the predetermined decoding mode of each of the luma blocks. | 11-01-2012 |
20120288007 | METHOD AND APPARATUS FOR ENCODING VIDEO USING VARIABLE PARTITIONS FOR PREDICTIVE ENCODING, AND METHOD AND APPARATUS FOR DECODING VIDEO USING VARIABLE PARTITIONS FOR PREDICTIVE ENCODING - A video encoding method and apparatus and a video decoding method and apparatus are provided. The video encoding method includes: prediction encoding in units of a coding unit as a data unit for encoding a picture, by using partitions determined based on a first partition mode and a partition level, so as to select a partition for outputting an encoding result from among the determined partitions; and encoding and outputting partition information representing a first partition mode and a partition level of the selected partition. The first partition mode represents a shape and directionality of a partition as a data unit for performing the prediction encoding on the coding unit, and the partition level represents a degree to which the coding unit is split into partitions for detailed motion prediction. | 11-15-2012 |
20120314768 | METHOD AND DEVICE FOR ENCODING/DECODING A PREDICTION IMAGE IN A LAYERED CODING STRUCTURE - There is provided a method and apparatus for efficiently coding/decoding pictures in a layered coding structure. The method for decoding pictures in a layered coding structure includes determining a block mode of a target block for which a prediction picture is to be generated, from a received block-based bitstream; and generating the prediction picture based on the determined block mode and peripheral block information including picture type information for a peripheral block of the target block. | 12-13-2012 |
20130142447 | METHOD AND APPARATUS FOR ENCODING AND DECODING IMAGE - Methods and apparatuses for encoding and decoding an image in which a block is searched for based on a representative value, rather than being searched for on a pixel-by-pixel basis, thereby search speed may be increased and computational complexity of a search operation may be reduced. | 06-06-2013 |
20130202201 | IMAGE CODING METHOD AND APPARATUS AND IMAGE DECODING METHOD AND APPARATUS, BASED ON CHARACTERISTICS OF REGIONS OF IMAGE - Methods of efficiently coding and decoding an image by analyzing each of regions of the image are provided. In the image coding method, an image format and a coding mode of a first region of an image are determined, whether a current image format of the first region is to be switched is determined based on the determined image format, and the first region is coded based on the determined image format and coding mode. | 08-08-2013 |
20130243391 | METHOD AND APPARATUS FOR CREATING A MEDIA FILE FOR MULTILAYER IMAGES IN A MULTIMEDIA SYSTEM, AND MEDIA-FILE-REPRODUCING APPARATUS USING SAME - The present invention relates to a method and apparatus for creating a media file for multilayer images. The method for creating a media file for multilayer images in a multimedia system according to one embodiment of the present invention comprises the following processes: encoding input images to generate bit streams of multilayer images; and taking, as an input, bit streams of the multilayer images, and creating a media file including a plurality of pieces of track information divided into a base layer and at least one enhancement layer, and media data for images of each layer. | 09-19-2013 |
20130272604 | METHOD AND APPARATUS FOR ENCODING AND DECODING IMAGE - An apparatus and method for encoding and decoding an image are provided. The image decoding method includes (a) decoding luma blocks according to a predetermined decoding mode of each of the luma blocks, and (b) decoding chroma blocks according to the predetermined decoding mode of each of the luma blocks. | 10-17-2013 |
20130300923 | APPARATUS AND METHOD FOR MULTILAYER PICTURE ENCODING/DECODING - Provided is a multilayer picture encoding/decoding apparatus and method for reducing a dynamic range of residual pictures occurring in enhancement layers. The multilayer picture encoding method includes performing format down-conversion on an input picture, and generating a lower layer bitstream by encoding the format down-converted input picture; performing format up-conversion by adaptively or selectively applying a 1-dimensional (1-D) prediction filter to a picture of the lower layer depending on whether a lower layer prediction flag is set or not; and calculating a residual picture between the input picture and the format up-converted picture, and generating an enhancement bitstream by encoding the calculated residual picture. | 11-14-2013 |
20140074911 | METHOD AND APPARATUS FOR MANAGING MULTI-SESSION - A method of managing sessions between a plurality of cloud servers and a client by a multi-session managing apparatus. The method includes receiving respective screen images of the plurality of cloud servers through a multi-session with the plurality of cloud servers; generating a single bitstream by using the screen images; and transmitting the single bitstream to the client through a single session with the client. | 03-13-2014 |
20140099041 | METHOD AND APPARATUS FOR ENCODING CLOUD DISPLAY SCREEN BY USING APPLICATION PROGRAMMING INTERFACE INFORMATION - A method and apparatus for implementing cloud computing by efficiently encoding a display screen between a cloud server and a client terminal. The method for encoding a cloud display screen in the cloud server, includes: acquiring region information of currently generated windows based on an application programming interface (API) function information of an Operating System (OS); extracting relative depth information between each of the currently generated windows from the OS; generating an encoding mode map in which an entire screen is divided into a plurality of blocks, based on the acquired region information and the extracted relative depth information; and encoding each of the plurality of blocks based on the generated encoding mode map. | 04-10-2014 |
20140101443 | METHOD AND APPARATUS FOR SELECTIVELY PROVIDING PROTECTION OF SCREEN INFORMATION DATA - A method and apparatus for enabling a cloud server to provide screen information data indicating a screen to be displayed on a client device are provided. The method of enabling a cloud server to provide screen information data relating to a screen to be displayed on a client device includes: generating the screen information data; determining whether or not to protect the generated screen information data based on characteristics of an object configuring the screen; encrypting the provided screen information data based on the determining; and transmitting the encrypted the screen information data to the client device. | 04-10-2014 |
20140198990 | METHOD AND APPARATUS FOR ENCODING AND DECODING IMAGE - An apparatus and method for encoding and decoding an image are provided. The image decoding method includes decoding luma blocks according to a predetermined decoding mode of each of the luma blocks, and decoding chroma blocks according to the predetermined decoding mode of each of the luma blocks. | 07-17-2014 |
20140212034 | METHOD AND APPARATUS FOR ENCODING AND DECODING IMAGE - An apparatus and method for encoding and decoding an image are provided. The image decoding method includes decoding luma blocks according to a predetermined decoding mode of each of the luma blocks, and decoding chroma blocks according to the predetermined decoding mode of each of the luma blocks. | 07-31-2014 |
20150043654 | IMAGE CODING AND DECODING METHOD AND APPARATUS CONSIDERING HUMAN VISUAL CHARACTERISTICS - An image coding method and apparatus considering human visual characteristics are provided. The image coding method comprises (a) modeling image quality distribution of an input image in units of scenes such that the quality of an image input in units of scenes is gradually lowered from a region of interest to a background region, (b) determining a quantization parameter of each region constituting one scene according to the result of modeling of image quality distribution, (c) quantizing image data in accordance with the quantization parameter, and (d) coding entropy of the quantized image data. | 02-12-2015 |
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 |