Patent application number | Description | Published |
20090079602 | N-BIN Arithmetic Coding for Context Adaptive Binary Arithmetic Coding - A method of context adaptive binary arithmetic coding and decoding groups a plurality N binary symbols in corresponding syntax elements and divides a range into 2 | 03-26-2009 |
20090324127 | Method and System for Automatic Red-Eye Correction - Methods and systems are provided for automatic red-eye correction in digital images in which the location of red eyes in a digital image is detected, the red eyes in the digital image are corrected by restoring the red eyes to their natural color; and the corrected digital image is displayed. | 12-31-2009 |
20100079582 | Method and System for Capturing and Using Automatic Focus Information - Methods and digital image capture devices are provided for capturing and using automatic focus information. Methods include building a three dimension (3D) focus map for a digital image on a digital image capture device, using the 3D focus map in processing the digital image, and storing the digital image. Digital image capture devices include a processor, a lens, a display operatively connected to the processor, means for automatic focus operatively connected to the processor and the lens, and a memory storing software instructions, wherein when executed by the processor, the software instructions cause the digital image capture device to initiate capture of a digital image, build a three dimension (3D) focus map for the digital image using the means for automatic focus, and complete capture of the digital image. | 04-01-2010 |
20100097248 | METHOD AND APPARATUS FOR VIDEO PROCESSING IN CONTEXT-ADAPTIVE BINARY ARITHMETIC CODING - A method and apparatus for coding of a significant map in accordance with the present invention. The method include carrying out a scan of at least a portion of a block of transform coefficients, calculating runs of zeros of the scanned data; and coding runs of zeros with variable length coding. | 04-22-2010 |
20100097250 | Parallel CABAC Decoding for Video Decompression - A method of video decoding is provided that includes receiving a data stream comprising a sequence of syntax elements that were compressed using context-adaptive binary arithmetic coding (CABAC), such that the encoding of each bin of a bin string representative of a syntax element was performed by arithmetic encoding. Two consecutive bins of a syntax element are decoded in parallel. Speculative computation and prefetching is used to reduce the critical path and thereby improve processing speed. | 04-22-2010 |
20100098155 | Parallel CABAC Decoding Using Entropy Slices - A method of video encoding is provided that includes performing context-adaptive binary arithmetic coding (CABAC) on a plurality of syntax element values in a slice to generate a plurality of entropy-encoded syntax element values, generating an entropy slice header to identify the plurality of entropy-encoded syntax element values as an entropy slice, wherein the entropy slice header comprises context model initialization information, and outputting the entropy slice header and the plurality of entropy encoded syntax element values. | 04-22-2010 |
20100098166 | VIDEO CODING WITH COMPRESSED REFERENCE FRAMES - A method and apparatus for video coding for reducing memory size and external memory access bandwidth in video coding, wherein the method compresses a reference frame prior to storing the reference frame to memory. | 04-22-2010 |
20100098169 | METHOD AND APPARATUS FOR MOTION ESTIMATION USING COMPRESSED REFERENCE FRAME - An apparatus and a method for determining motion estimation with compressed frame, the method includes loading a macroblock of a current image into codec, transferring a compressed version of motion estimation search window data from previous frame to codec, and carrying out motion estimation to calculate motion vector for current macroblock by matching block to uncompressed version of previous frame data in search window. | 04-22-2010 |
20110069751 | Method and Apparatus for Determination of Motion Estimation Search Window Area Utilizing Adaptive Sliding Window Algorithm - A method and apparatus for motion estimation utilizing adaptive sliding window algorithm, the method includes estimating motion estimation search window size, transferring data from a previous picture relating to the search window, wherein the size of the search window is determined, and calculating motion vector of the current block by block matching the current block with data of the previous picture in search window. | 03-24-2011 |
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 |
20110142135 | Adaptive Use of Quarter-Pel Motion Compensation - A method of encoding a digital video sequence is provided that includes disabling quarter-pel motion compensation for a first sequence of blocks in the digital video sequence, computing an average half-pel cost for the first sequence of blocks, computing an average quarter-pel cost for the first sequence of blocks, and enabling quarter-pel motion compensation for a second sequence of blocks in the digital video sequence based on a comparison of the average half-pel cost and the average quarter-pel cost. | 06-16-2011 |
20110170594 | Method and System for Intracoding in Video Encoding - A method of intra-coding blocks of pixels in a digital video sequence is provided that includes selecting a block transform of a plurality of block transforms according to a spatial prediction mode used in generating a block of pixel residual values from a block of pixels, wherein the block transform is based on a single directional transform matrix predetermined for the spatial prediction mode and is a same size as the block of pixel values, applying the block transform to the block of pixel residual values to generate transform coefficients of the residual pixel values, and entropy coding the generated transform coefficients. | 07-14-2011 |
20110228852 | Adaptive Coding Structure and Adaptive FCode Determination in Video Coding - A method of encoding a digital video sequence is provided that includes computing a motion vector (MV) histogram and a motion threshold for a first frame of the digital video sequence, and using the MV histogram and the motion threshold for one selected from a group consisting of adaptive fcode determination and adaptive coding structure determination. | 09-22-2011 |
20110228858 | CABAC Decoder with Decoupled Arithmetic Decoding and Inverse Binarization - An encoded bitstream of entropy encoded video data is received by a video decoder. The encoded bitstream represents syntax elements of a sequence of coding blocks. The sequence of coding blocks is recovered by processing a bin sequences associated with each coding block in a processing pipeline, wherein a defined amount of time is allocated to process each coding block in the processing pipeline. The encoded bitstream is arithmetically decoded to produce each bin sequence. The arithmetic decoder is time-wise decoupled from the processing pipeline by storing a plurality of the bin sequences in a buffer memory. | 09-22-2011 |
20110274162 | Coding Unit Quantization Parameters in Video Coding - A method is provided that includes receiving a coded largest coding unit in a video decoder, wherein the coded largest coding unit includes a coded coding unit structure and a plurality of coded quantization parameters, and decoding the coded largest coding unit based on the coded coding unit structure and the plurality of coded quantization parameters. | 11-10-2011 |
20120014454 | Method and Apparatus for Parallel Context Processing - A method and apparatus for parallel context processing for example for high coding efficient entropy coding in HEVC. The method comprising retrieving syntax element relating to a block of an image, grouping at least two bins belonging to similar context based on the syntax element, and coding the grouped bins in parallel. | 01-19-2012 |
20120082211 | Low Complexity Large Transform - Methods of encoding a video stream in a video encoder and decoding an encoded video stream in a video decoder using a low complexity large transform are provided. An encoding method includes receiving an n×n residual block in a transform component of the video encoder, and transforming the n×n residual block using an n×n transform to generate an n×n transform coefficient block, wherein the n×n transform is based on (n/m*n/m) m×m Hadamard transforms and (m*m) (n/m)×(n/m) discrete cosign transforms, wherein m04-05-2012 | |
20120082212 | Transform and Quantization Architecture for Video Coding and Decoding - A method of encoding a video stream in a video encoder is provided that includes computing an offset into a transform matrix based on a transform block size, wherein a size of the transform matrix is larger than the transform block size, and wherein the transform matrix is one selected from a group consisting of a DCT transform matrix and an IDCT transform matrix, and transforming a residual block to generate a DCT coefficient block, wherein the offset is used to select elements of rows and columns of a DCT submatrix of the transform block size from the transform matrix. | 04-05-2012 |
20120082215 | Simplified Binary Arithmetic Coding Engine - A method of entropy coding in a video encoder is provided that includes assigning a first bin to a first single-probability bin encoder based on a probability state of the first bin, wherein the first single-probability bin encoder performs binary arithmetic coding based on a first fixed probability state, assigning a second bin to a second single-probability bin encoder based on a probability state of the second bin, wherein the second single-probability bin encoder performs binary arithmetic coding based on a second fixed probability state different from the first fixed probability state, and coding the first bin in the first single-probability bin encoder and the second bin in the second single-probability bin encoder in parallel, wherein the first single-probability bin encoder uses a first rLPS table for the first fixed probability state and the second single-probability bin encoder uses a second rLPS table for the second fixed probability state. | 04-05-2012 |
20120082233 | METHOD AND APPARATUS FOR DIAGONAL SCAN AND SIMPLIFIED CONTEXT SELECTION FOR PARALLEL ENTROPY CODING OF SIGNIFICANCE MAP OF TRANSFORM COEFFICIENTS - A method and apparatus for encoding bit code utilizing context dependency simplification to reduce dependent scans. The method includes retrieving at least one 2 dimensional array of transform coefficient, transforming the at least one 2 dimensional array of the significance map of the transform coefficient to a 1 dimensional coefficient scanning and determining at least one of scan direction, coding unit type and slice type assigned to transform coefficient, selecting neighbors based on at least one of scan direction and coding unit type and slice type, computing context index based on the values of the selected neighbors for context selection, and performing arithmetic coding to generate coded bit utilizing the computed context index and binarization. | 04-05-2012 |
20120082392 | METHOD AND APPARATUS FOR FRAME CODING IN VERTICAL RASTER SCAN ORDER FOR HEVC - A method and apparatus for frame coding in adaptive raster scan order. The method includes encoding at least one of image or video utilizing input frames and at least one of a data related to the input frame to produce bitstream with raster scan order information and displacement information for producing compressed video bitstream, at decoding time, decoding at least one of the encoded bitstream with raster scan order information and displacement information for producing compressed video bitstream. | 04-05-2012 |
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 |
20120177104 | Reduced Complexity Adaptive Loop Filter (ALF) for Video Coding - Methods and apparatus for adaptive loop filtering in video coding are provided. The adaptive loop filtering may be largest coding unit (LCU) based, may use adaptive loop filter types in which the vertical size of a filter type is less than the horizontal size, may use a predefined set of filter types in which the vertical size of the largest filter type in the set is less than the horizontal size of the largest filter type in the set, may use a single adaptive loop filter type, and/or may use a filter type that is a cross with a center shape of a size dependent on an aspect ratio of the cross. | 07-12-2012 |
20120229478 | REDUCED CONTEXT DEPENDENCY AT TRANSFORM EDGES FOR PARALLEL CONTEXT PROCESSING - A method and apparatus for parallel processing of at least two bins relating to at least one of a video and an image. The method includes determining scan type of at least a portion of the at least one of video and an image, analyzing neighboring position of a bin, removing dependencies of context selection based on the scan type and position of location being encoded in a transform, and performing parallel processing of that least two bins. | 09-13-2012 |
20120233405 | Caching Method and System for Video Coding - A method of caching reference data in a reference data cache is provided that includes receiving an address of a reference data block in the reference data cache, wherein the address includes an x coordinate and a y coordinate of the reference data block in a reference block of pixels and a reference block identifier specifying which of a plurality of reference blocks of pixels includes the reference data block, computing an index of a set of cache lines in the reference data cache using bits from the x coordinate and bits from the y coordinate, using the index and a tag comprising the reference block identifier to determine whether the reference data block is in the set of cache lines, and retrieving the reference data block from reference data storage when the reference data block is not in the set of cache lines. | 09-13-2012 |
20120287987 | Coding of Scene Changes Using Picture Dropping - A method for encoding a video sequence in a video encoder to generate a compressed bit stream is provided that includes coding a picture in the video sequence, detecting a scene change in the picture, and responsive to detecting the scene change, dropping the picture, signaling repetition of another picture in the compressed bit stream, and intra-coding a subsequent picture in the video sequence. | 11-15-2012 |
20120287989 | Inverse Transformation Using Pruning For Video Coding - A method for decoding an encoded video bit stream in a video decoder is provided that includes determining a scan pattern type for a transform block to be decoded, decoding a column position X and a row position Y of a last non-zero coefficient in the transform block from the encoded video bit stream, selecting a column-row inverse transform order when the scan pattern type is a first type, selecting a row-column inverse transform order when the scan pattern type is a second type, and performing one dimensional (1D) inverse discrete cosine transformation (IDCT) computations according to the selected transform order to inversely transform the transform block to generate a residual block. | 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 |
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 |
20120307004 | VIDEO DECODING WITH 3D GRAPHICS SHADERS - Video coding using 3D graphics rendering hardware by enhancing pixel shaders to pixel block shaders to provide efficient motion compensation computations. Reference frame prediction corresponds to texture lookup, and matrix multiplication is cast in linear combinations of rows format to correspond to pixel shader vector operations. | 12-06-2012 |
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 |
20130011063 | METHOD, SYSTEM AND COMPUTER PROGRAM PRODUCT FOR CODING A REGION OF INTEREST WITHIN AN IMAGE OF MULTIPLE VIEWS - For coding at least one region of interest within an image of multiple views, disparities are identified between the multiple views. In response to the disparities, the at least one region of interest is identified. The at least one region of interest is encoded at lower quantization relative to a remainder of the image. The remainder of the image is encoded at higher quantization relative to the at least one region of interest. | 01-10-2013 |
20130022103 | METHOD AND APPARATUS FOR SAMPLE ADAPTIVE OFFSET PARAMETER ESTIMATIONFOR IMAGE AND VIDEO CODING - A method and apparatus for decoding video. The method includes determining a sample adaptive offset edge type of at least a portion of the image, determining a boundary edge type of the at least a portion of the image, modifying the sample adaptive offset edge type of the at least a portion of the image according to the determined edge type of the at least a portion of the image, selecting a sample adaptive offset type according to at least one of the determined sample adaptive offset edge type or the modified sample adaptive offset edge type, and filtering at least a portion of the image utilizing the selected filter type. | 01-24-2013 |
20130051454 | Sample Adaptive Offset (SAO) Parameter Signaling - A method for sample adaptive offset (SAO) filtering and SAO parameter signaling in a video encoder is provided that includes determining SAO parameters for largest coding units (LCUs) of a reconstructed picture, wherein the SAO parameters include an indicator of an SAO filter type and a plurality of SAO offsets, applying SAO filtering to the reconstructed picture according to the SAO parameters, and entropy encoding LCU specific SAO information for each LCU of the reconstructed picture in an encoded video bit stream, wherein the entropy encoded LCU specific SAO information for the LCUs is interleaved with entropy encoded data for the LCUs in the encoded video bit stream. Determining SAO parameters may include determining the LCU specific SAO information to be entropy encoded for each LCU according to an SAO prediction protocol. | 02-28-2013 |
20130051455 | Flexible Region Based Sample Adaptive Offset (SAO) and Adaptive Loop Filter (ALF) - A method for in-loop filtering in a video encoder is provided that includes determining filter parameters for each filtering region of a plurality of filtering regions of a reconstructed picture, applying in-loop filtering to each filtering region according to the filter parameters determined for the filtering region, and signaling the filter parameters for each filtering region in an encoded video bit stream, wherein the filter parameters for each filtering region are signaled after encoded data of a final largest coding unit (LCU) in the filtering region, wherein the in-loop filtering is selected from a group consisting of adaptive loop filtering and sample adaptive offset filtering. | 02-28-2013 |
20130083163 | Perceptual Three-Dimensional (3D) Video Coding Based on Depth Information - A method for encoding a multi-view frame in a video encoder is provided that includes computing a depth quality sensitivity measure for a multi-view coding block in the multi-view frame, computing a depth-based perceptual quantization scale for a 2D coding block of the multi-view coding block, wherein the depth-based perceptual quantization scale is based on the depth quality sensitive measure and a base quantization scale for the 2D frame including the 2D coding block, and encoding the 2D coding block using the depth-based perceptual quantization scale. | 04-04-2013 |
20130094779 | Method and Apparatus for Prediction Unit Size Dependent Motion Compensation Filtering Order - A motion compensation method and apparatus. The method includes retrieving data relating to a reference bock, performing a transpose on the retrieved data, performing vertical filtering on the transposed retrieved data, performing one or more transpose on the vertically filtered data, performing horizontal filtering on the transposed vertically filtered dad, and generating an interpolated bock and storing the interpolated block. | 04-18-2013 |
20130114692 | Simplified Coefficient Scans for Non-Square Transforms (NSQT) in Video Coding - A method for encoding a video sequence is provided that includes applying a non-square transform to a non-square block of residual values to generate a non-square block of transform coefficients, quantizing the transform coefficients to generate a non-square block of quantized transform coefficients, dividing the non-square block of quantized transform coefficients into a plurality of square blocks of quantized transform coefficients, and entropy encoding the plurality of square coefficient blocks. | 05-09-2013 |
20130117343 | Unified Forward and Inverse Transform Architecture - Multiple transform sizes improve video coding efficiency, but also increase the implementation complexity. Furthermore, both forward and inverse transforms need to be supported in various consumer devices. Embodiments provide a unified forward and inverse transform architecture that supports computation of both forward and inverse transforms for multiple transforms sizes using shared hardware circuits. The unified architecture exploits the symmetry properties of forward and inverse transform matrices to achieve hardware sharing across different the transform sizes and also between forward and inverse transform computations. | 05-09-2013 |
20130156097 | Adaptive Loop Filtering (ALF) for Video Coding - A method for adaptive loop filtering of a reconstructed picture in a video encoder is provided that includes determining whether or not sample adaptive offset (SAO) filtering is applied to the reconstructed picture, and using adaptive loop filtering with no offset for the reconstructed picture when the SAO filtering is determined to be applied to the reconstructed picture. | 06-20-2013 |
20130163677 | METHOD AND APPARATUS FOR VIDEO ENCODING AND/OR DECODING TO PREVENT START CODE CONFUSION - A method and a video processor for preventing start code confusion. The method includes aligning bytes of a slice header relating to slice data when the slice header is not byte aligned or inserting differential data at the end of the slice header before the slice data when the slice header is byte aligned, performing emulation prevention byte insertion on the slice header, and combine the slice header and the slice data after performing emulation prevention byte insertion. | 06-27-2013 |
20130177069 | Context Adaptive Binary Arithmetic Coding (CABAC) with Scalable Throughput and Coding Efficiency - A method for encoding a video sequence is provided that includes entropy encoding syntax elements representative of transform coefficients generated as the video sequence is processed, wherein entropy encoding syntax elements representative of a transform coefficient includes binarizing the syntax elements representative of the transform coefficient to generate a plurality of binary symbols (bins), coding a portion of the plurality of bins in context coding mode, and coding a remaining portion of the plurality of bins in bypass coding mode. The method further includes reducing the number of bins that are coded in context coding mode for each transform coefficient in a plurality of subsequent transform coefficients that are entropy encoded after a specified number of transform coefficients have been entropy encoded. | 07-11-2013 |
20130182759 | Method and Apparatus for Sample Adaptive Offset Parameter Estimation in Video Coding - A method for sample adaptive offset (SAO) filtering in a video encoder is provided that includes estimating SAO parameters for color components of a largest coding unit (LCU) of a picture, wherein estimating SAO parameters includes using at least some non-deblock-filtered reconstructed pixels of the LCU to estimate the SAO parameters, performing SAO filtering on the reconstructed LCU according to the estimated SAO parameters, and entropy encoding SAO information for the LCU in a compressed video bit stream, wherein the SAO information signals the estimated SAO parameters for the LCU. | 07-18-2013 |
20130266060 | Reduced Complexity Coefficient Transmission for Adaptive Loop Filtering (ALF) in Video Coding - A method for adaptive loop filtering is provided that includes determining a coefficient value for each coefficient position of an adaptive loop filter, applying the adaptive loop filter to at least a portion of a reconstructed picture using the coefficient values, and entropy encoding coefficient values into a compressed bit stream using predetermined short binary codes, wherein the short binary code used depends on the coefficient position of the coefficient value. | 10-10-2013 |
20130272389 | Reducing Context Coded and Bypass Coded Bins to Improve Context Adaptive Binary Arithmetic Coding (CABAC) Throughput - Techniques for context-adaptive binary arithmetic coding (CABAC) coding with a reduced number of context coded and/or bypass coded bins are provided. Rather than using only truncated unary binarization for the syntax element representing the delta quantization parameter and context coding all of the resulting bins as in the prior art, a different binarization is used and only part of the resulting bins are context coded, thus reducing the worst case number of context coded bins for this syntax element. Further, binarization techniques for the syntax element representing the remaining actual value of a transform coefficient are provided that restrict the maximum codeword length of this syntax element to 32 bits or less, thus reducing the number of bypass coded bins for this syntax element over the prior art. | 10-17-2013 |
20130272624 | Virtual Boundary Processing Simplification for Adaptive Loop Filtering (ALF) in Video Coding - Virtual boundary processing in adaptive loop filtering (ALF) requires that padded values be substituted for unavailable pixel rows outside the virtual boundaries. Methods and apparatus are provided for virtual boundary processing in ALF that allow the use of more actual pixel values for padding than in the prior art. | 10-17-2013 |
20130287099 | Block Artifact Suppression in Video Coding - A method for encoding a video sequence in a video encoder is provided that includes adapting a quantization parameter of a block of pixels in a picture of the video sequence based on a transform block size of the block of pixels to determine a final quantization parameter, and quantizing transform coefficients of the block of pixels using the final quantization parameter. | 10-31-2013 |
20130294501 | Signaling Signed Band Offset Values for Sample Adaptive Offset (SAO) Filtering in Video Coding - A method for signaling sample adaptive offset (SAO) band offset syntax elements in a video encoder is provided that includes receiving a plurality of band offset syntax elements, entropy encoding an absolute value of a magnitude of each band offset syntax element in a compressed video bit stream, and entropy encoding a sign of each non-zero band offset syntax element in the compressed video bit stream following the absolute values of the magnitudes. | 11-07-2013 |
20130336385 | Inverse Transformation Using Pruning for Video Coding - A method for inverse discrete cosine transformation (IDCT) in video coding is provided that includes receiving a transform block, identifying a region of non-zero transform coefficients in the transform block using a group significance map corresponding to the transform block, wherein any transform coefficients not in the region have a value of zero, applying a one-dimensional (1D) IDCT to the region of non-zero transform coefficients in a first direction to generate an interim results block, wherein 1D IDCT computations are not performed on transform coefficients outside the region, and applying a 1D IDCT to the interim results block in a second direction to generate a residual block. | 12-19-2013 |
20140079118 | Region of Interest (ROI) Request and Inquiry in a Video Chain - A method for video stream processing in a video chain is provided that includes transmitting a video stream in the video chain, receiving, by a first video node in the video chain, a region of interest (ROI) command from a second video node in the video chain, wherein the ROI command includes an ROI type indicator, and performing, by the first video node, the ROI command according to the ROI type indicator. | 03-20-2014 |
20140185681 | Hierarchical Inter-Layer Prediction in Multi-Loop Scalable Video Coding - A method for encoding a video sequence in a scalable video encoder to generate a scalable bitstream is provided that includes encoding the video sequence in a first layer encoder of the scalable video encoder to generate a first sub-bitstream, encoding the video sequence in a second layer encoder of the scalable video encoder to generate a second sub-bitstream, wherein portions of the video sequence being encoded in the second layer encoder are predicted using reference portions of the video sequence encoded in the first layer encoder, combining the first sub-bitstream and the second sub-bitstream in the scalable bitstream, and signaling an indication of a highest temporal level of the first sub-bitstream comprising at least one of the reference portions in the scalable bitstream. | 07-03-2014 |
20140185691 | Signaling Decoded Picture Buffer Size in Multi-Loop Scalable Video Coding - A method for encoding a video sequence in a scalable video encoder to generate a scalable bitstream is provided that includes encoding the video sequence in a first layer encoder of the scalable video encoder to generate a first sub-bitstream, encoding the video sequence in a second layer encoder of the scalable video encoder to generate a second sub-bitstream, wherein portions of the video sequence being encoded in the second layer encoder are predicted using reference portions of the video sequence encoded in the first layer encoder, combining the first sub-bitstream and the second sub-bitstream to generate the scalable bitstream, and signaling in the scalable bitstream an indication of a maximum decoded picture buffer (DPB) size needed for decoding the second sub-bitstream and the first sub-bitstream when the second sub-bitstream is a target sub-bitstream for decoding. | 07-03-2014 |
20140301465 | Video Coding Using Intra Block Copy - A method for decoding encoded blocks of pixels from an encoded video bit stream is provided that includes decoding a block vector corresponding to an encoded block of pixels from the encoded bit stream, verifying that the block vector indicates a block of reconstructed pixels in a search area including reconstructed pixels of a largest coding unit (LCU) including the encoded block of pixels and N left neighboring reconstructed LCUs of the LCU, and decoding the encoded block of pixels, wherein the block of reconstructed pixels is used as a predictor for the encoded block of pixels. | 10-09-2014 |
20140334536 | SIGNALING SIGNED BAND OFFSET VALUES FOR SAMPLE ADAPTIVE OFFSET (SAO) FILTERING IN VIDEO CODING - A method for signaling sample adaptive offset (SAO) band offset syntax elements in a video encoder is provided that includes receiving a plurality of band offset syntax elements, entropy encoding an absolute value of a magnitude of each band offset syntax element in a compressed video bit stream, and entropy encoding a sign of each non-zero band offset syntax element in the compressed video bit stream following the absolute values of the magnitudes. | 11-13-2014 |
20140334558 | SAMPLE ADAPTIVE OFFSET (SAO) PARAMETER SIGNALING - A method for sample adaptive offset (SAO) filtering and SAO parameter signaling in a video encoder is provided that includes determining SAO parameters for largest coding units (LCUs) of a reconstructed picture, wherein the SAO parameters include an indicator of an SAO filter type and a plurality of SAO offsets, applying SAO filtering to the reconstructed picture according to the SAO parameters, and entropy encoding LCU specific SAO information for each LCU of the reconstructed picture in an encoded video bit stream, wherein the entropy encoded LCU specific SAO information for the LCUs is interleaved with entropy encoded data for the LCUs in the encoded video bit stream. Determining SAO parameters may include determining the LCU specific SAO information to be entropy encoded for each LCU according to an SAO prediction protocol. | 11-13-2014 |
20150049805 | CODING UNIT QUANTIZATION PARAMETERS IN VIDEO CODING - A method is provided that includes receiving a coded largest coding unit in a video decoder, wherein the coded largest coding unit includes a coded coding unit structure and a plurality of coded quantization parameters, and decoding the coded largest coding unit based on the coded coding unit structure and the plurality of coded quantization parameters. | 02-19-2015 |