公开(公告)号：US12216733B2

公开(公告)日：2025-02-04

申请号：US18131747

申请日：2023-04-06

Applicant: Texas Instruments Incorporated

Inventor： Madhukar Budagavi ,  Vivienne Sze

IPC: H04N19/122 ,  G06F17/14 ,  H04N19/134 ,  H04N19/14 ,  H04N19/176 ,  H04N19/18 ,  H04N19/42 ,  H04N19/46 ,  H04N19/48 ,  H04N19/61

Abstract: 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.

公开(公告)号：US20250039417A1

公开(公告)日：2025-01-30

申请号：US18911329

申请日：2024-10-10

Applicant: Texas Instruments Incorporated

Inventor： Madhukar Budagavi ,  Mehmet U. Demircin ,  Vivienne Sze

IPC: H04N19/436 ,  H04N19/13 ,  H04N19/139 ,  H04N19/176 ,  H04N19/46 ,  H04N19/70 ,  H04N19/91

Abstract: 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.

公开(公告)号：US12120333B2

公开(公告)日：2024-10-15

申请号：US18241316

申请日：2023-09-01

Applicant: Texas Instruments Incorporated

Inventor： Madhukar Budagavi ,  Mehmet U. Demircin ,  Vivienne Sze

IPC: H04N19/436 ,  H04N19/13 ,  H04N19/139 ,  H04N19/176 ,  H04N19/46 ,  H04N19/70 ,  H04N19/91

CPC classification number: H04N19/436 ,  H04N19/13 ,  H04N19/139 ,  H04N19/176 ,  H04N19/46 ,  H04N19/70 ,  H04N19/91

Abstract: 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.

公开(公告)号：US20230412826A1

公开(公告)日：2023-12-21

申请号：US18241316

申请日：2023-09-01

Applicant: Texas Instruments Incorporated

Inventor： Madhukar Budagavi ,  Mehmet U. Demircin ,  Vivienne Sze

IPC: H04N19/436 ,  H04N19/91 ,  H04N19/46 ,  H04N19/70 ,  H04N19/13 ,  H04N19/139 ,  H04N19/176

CPC classification number: H04N19/436 ,  H04N19/91 ,  H04N19/46 ,  H04N19/70 ,  H04N19/13 ,  H04N19/139 ,  H04N19/176

Abstract: 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.

公开(公告)号：US11750826B2

公开(公告)日：2023-09-05

申请号：US17936003

申请日：2022-09-28

Applicant: Texas Instruments Incorporated

Inventor： Madhukar Budagavi ,  Mehmet U. Demircin ,  Vivienne Sze

IPC: H04N19/436 ,  H04N19/91 ,  H04N19/46 ,  H04N19/70 ,  H04N19/13 ,  H04N19/139 ,  H04N19/176

CPC classification number: H04N19/436 ,  H04N19/13 ,  H04N19/139 ,  H04N19/176 ,  H04N19/46 ,  H04N19/70 ,  H04N19/91

Abstract: 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.

公开(公告)号：US20230217045A1

公开(公告)日：2023-07-06

申请号：US18120624

申请日：2023-03-13

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Vivienne Sze ,  Madhukar Budagavi ,  Woo-Shik Kim ,  Do-Kyoung Kwon ,  Minhua Zhou

IPC: H04N19/86 ,  H04N19/70 ,  H04N19/117 ,  H04N19/463 ,  H04N19/82 ,  H04N19/80 ,  H04N19/91

CPC classification number: H04N19/86 ,  H04N19/70 ,  H04N19/117 ,  H04N19/463 ,  H04N19/82 ,  H04N19/80 ,  H04N19/91

Abstract: 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.

公开(公告)号：US11652997B2

公开(公告)日：2023-05-16

申请号：US17355488

申请日：2021-06-23

Applicant: Texas Instruments Incorporated

Inventor： Vivienne Sze ,  Madhukar Budagavi

IPC: H04N19/00 ,  H04N19/13 ,  H04N19/91 ,  H04N19/124 ,  H04N19/60 ,  H04N19/70 ,  H04N19/184

CPC classification number: H04N19/13 ,  H04N19/124 ,  H04N19/60 ,  H04N19/70 ,  H04N19/91 ,  H04N19/184

Abstract: 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.

公开(公告)号：US11575946B2

公开(公告)日：2023-02-07

申请号：US15427961

申请日：2017-02-08

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Vivienne Sze

IPC: H04N19/70 ,  H04N19/91 ,  H04N19/61 ,  H04N19/50 ,  H04N19/122 ,  H04N19/46 ,  H04N19/176 ,  H04N19/184 ,  H04N19/186

Abstract: 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.

公开(公告)号：US20220360798A1

公开(公告)日：2022-11-10

申请号：US17872382

申请日：2022-07-25

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Vivienne Sze ,  Madhukar Budagavi

IPC: H04N19/18 ,  H04N19/176 ,  H04N19/13 ,  H04N19/134

Abstract: 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.

公开(公告)号：USRE49019E1

公开(公告)日：2022-04-05

申请号：US16742738

申请日：2020-01-14

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Minhua Zhou ,  Vivienne Sze

IPC: 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

Abstract: 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.