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1. 发明授权

US11575946B2 Simplified context selection for entropy coding of transform coefficient syntax elements 有权
公开(公告)号：US11575946B2
公开(公告)日：2023-02-07
申请号：US15427961
申请日：2017-02-08
申请人： TEXAS INSTRUMENTS INCORPORATED
发明人： Vivienne Sze
IPC分类号： H04N19/70 , H04N19/91 , H04N19/61 , H04N19/50 , H04N19/122 , H04N19/46 , H04N19/176 , H04N19/184 , H04N19/186
摘要： A method for entropy encoding syntax elements of transform coefficient levels in a video encoder to generate a compressed video bit stream is provided that includes selecting a context for a first significant coefficient flag corresponding to a first transform coefficient level in a 32×32 transform block, wherein the first transform coefficient level is at a lowest frequency position in the 32×32 transform block, entropy encoding the first significant coefficient flag using the context, selecting the context for a second significant coefficient flag corresponding to a second transform coefficient level in a 16×16 transform block, wherein the second transform coefficient level is at a lowest frequency position in the 16×16 transform block, and entropy encoding the second significant coefficient flag using the context.

2. 发明申请

US20220360798A1 METHOD AND APPARATUS FOR PARALLELIZING CONTEXT SELECTION IN VIDEO PROCESSING 有权
公开(公告)号：US20220360798A1
公开(公告)日：2022-11-10
申请号：US17872382
申请日：2022-07-25
申请人： TEXAS INSTRUMENTS INCORPORATED
发明人： Vivienne Sze , Madhukar Budagavi
IPC分类号： H04N19/18 , H04N19/176 , H04N19/13 , H04N19/134
摘要： 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.

3. 再颁专利

USRE49019E1 Quantization matrix compression in video coding 有权
公开(公告)号：USRE49019E1
公开(公告)日：2022-04-05
申请号：US16742738
申请日：2020-01-14
申请人： TEXAS INSTRUMENTS INCORPORATED
发明人： Minhua Zhou , Vivienne Sze
IPC分类号： H04N7/12 , H04N19/124 , H04N19/105 , H04N19/117 , H04N19/126 , H04N19/176 , H04N19/184 , H04N19/463 , H04N19/59 , H04N19/60 , H04N19/61 , H04N19/85 , H04L65/61 , H04L65/60
摘要： A method of quantization matrix compression in a video encoder is provided that includes preprocessing a quantization matrix by performing at least one selected from down-sampling the quantization matrix and imposing 135 degree symmetry on the quantization matrix, performing zigzag scanning on the pre-processed quantization matrix to generate a one dimensional (1D) sequence, predicting the 1D sequence to generate a residual 1D sequence, and coding the residual 1D sequence using kth order exp-Golomb coding to generate a compressed quantization matrix, wherein k≥0.

4. 发明申请

US20220007026A1 Reducing Context Coded and Bypass Coded Bins to Improve Context Adaptive Binary Arithmetic Coding (CABAC) Throughput 有权
公开(公告)号：US20220007026A1
公开(公告)日：2022-01-06
申请号：US17477588
申请日：2021-09-17
申请人： Texas Instruments Incorporated
发明人： Vivienne Sze , Madhukar Budagavi
IPC分类号： H04N19/13 , H04N19/91 , H04N19/124 , H04N19/70 , H04N19/60
摘要： 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.

5. 发明授权

US10783217B2 Inverse transformation using pruning for video coding 有权
公开(公告)号：US10783217B2
公开(公告)日：2020-09-22
申请号：US15688405
申请日：2017-08-28
申请人： Texas Instruments Incorporated
发明人： Madhukar Budagavi , Vivienne Sze
IPC分类号： G06F17/14 , H04N19/176 , H04N19/46 , H04N19/134 , H04N19/122 , H04N19/61 , H04N19/14 , H04N19/18 , H04N19/48 , H04N19/42
摘要： 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.

6. 发明申请

US20190297324A1 Reducing Context Coded and Bypass Coded Bins to Improve Context Adaptive Binary Arithmetic Coding (CABAC) Throughput 审中-公开
公开(公告)号：US20190297324A1
公开(公告)日：2019-09-26
申请号：US16437277
申请日：2019-06-11
申请人： Texas Instruments Incorporated
发明人： Vivienne Sze , Madhukar Budagavi
IPC分类号： H04N19/13 , H04N19/70 , H04N19/60 , H04N19/91 , H04N19/124
摘要： 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.

7. 发明授权

US10321131B2 Reducing context coded and bypass coded bins to improve context adaptive binary arithmetic coding (CABAC) throughput 有权
公开(公告)号：US10321131B2
公开(公告)日：2019-06-11
申请号：US15431532
申请日：2017-02-13
申请人： Texas Instruments Incorporated
发明人： Vivienne Sze , Madhukar Budagavi
IPC分类号： H04N19/13 , H04N19/91 , H04N19/124 , H04N19/60 , H04N19/70 , H04N19/184
摘要： 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.

8. 发明授权

US09696145B2 Opportunistic structured light 有权
公开(公告)号：US09696145B2
公开(公告)日：2017-07-04
申请号：US14185562
申请日：2014-02-20
申请人： Texas Instruments Incorporated
发明人： Vivienne Sze , Goksel Dedeoglu , Vinay Sharma
IPC分类号： G01B11/25
CPC分类号： G01B11/25
摘要： A method for using structured light in a handheld projection device is provided that includes projecting a structured light pattern in at least one portion of a frame being projected by the handheld projection device, wherein the at least one portion of the frame is a subset of the frame, capturing an image of the projected frame, computing scene depth information based on the structured light pattern in the captured image, and using the scene depth information in processing of a subsequent frame of the video stream.

9. 发明申请

US20170085873A1 SIGNALING SIGNED BAND OFFSET VALUES FOR SAMPLE ADAPTIVE OFFSET (SAO) FILTERING IN VIDEO CODING 审中-公开
公开(公告)号：US20170085873A1
公开(公告)日：2017-03-23
申请号：US15357898
申请日：2016-11-21
申请人： TEXAS INSTRUMENTS INCORPORATED
发明人： Vivienne Sze , Madhukar Budagavi
IPC分类号： H04N19/117 , H04N19/172 , H04N19/615 , H04N19/86 , H04N19/91 , H04N19/124
CPC分类号： H04N19/117 , H04N19/124 , H04N19/136 , H04N19/15 , H04N19/17 , H04N19/172 , H04N19/463 , H04N19/60 , H04N19/615 , H04N19/625 , H04N19/86 , H04N19/91
摘要： 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.

10. 发明授权

US09503717B2 Context adaptive binary arithmetic coding (CABAC) with scalable throughput and coding efficiency 有权
标题翻译：具有可扩展吞吐量和编码效率的上下文自适应二进制算术编码（CABAC）
公开(公告)号：US09503717B2
公开(公告)日：2016-11-22
申请号：US13737809
申请日：2013-01-09
申请人： Texas Instruments Incorporated
发明人： Vivienne Sze , Madhukar Budagavi
IPC分类号： H04N7/26 , H04N19/13 , H04N19/91
CPC分类号： H04N19/13 , H04N19/174 , H04N19/176 , H04N19/184 , H04N19/60 , H04N19/70 , H04N19/91
摘要： 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.
摘要翻译：提供了一种用于对视频序列进行编码的方法，其包括代表视频序列被处理产生的代表变换系数的熵编码语法元素，其中代表变换系数的熵编码语法元素包括二进制表示变换系数的语法元素，多个二进制符号（bin），以上下文编码模式编码多个bin的一部分，并且以旁路编码模式对多个bin的剩余部分进行编码。该方法还包括减少在上下文编码模式中编码的多个后变换系数中的每个变换系数的数目的数量，该多个后续变换系数在已经对特定数目的变换系数进行熵编码之后被熵编码。

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