公开(公告)号：US20210195194A1

公开(公告)日：2021-06-24

申请号：US17191748

申请日：2021-03-04

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Minhua Zhou ,  Mehmet Umut Demircin ,  Madhukar Budagavi

IPC: H04N19/124 ,  H04N19/176 ,  H04N19/463 ,  H04N19/196 ,  H04N19/167 ,  H04N19/60 ,  H04N19/172 ,  H04N19/184 ,  H04N19/117 ,  H04N19/13 ,  H04N19/15 ,  H04N19/159 ,  H04N19/43 ,  H04N19/61

Abstract: 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.

公开(公告)号：US10992948B2

公开(公告)日：2021-04-27

申请号：US16898820

申请日：2020-06-11

Applicant: Texas Instruments Incorporated

Inventor： Minhua Zhou

IPC: H04N19/51 ,  H04N19/176 ,  H04N19/105 ,  H04N19/433 ,  H04N19/109 ,  H04N19/159 ,  H04N19/122 ,  H04N19/157 ,  H04N19/174 ,  H04N19/184

Abstract: Motion compensation requires a significant amount of memory bandwidth, especially for smaller prediction unit sizes. The worst case bandwidth requirements can occur when bi-predicted 4×8 or 8×4 PUs are used. To reduce the memory bandwidth requirements for such smaller PUs, methods are provided for restricting inter-coded PUs of small block sizes to be coded only in a uni-predictive mode, i.e., forward prediction or backward prediction. More specifically, PUs of specified restricted sizes in bi-predicted slices (B slices) are forced to be uni-predicted.

公开(公告)号：US20210099717A1

公开(公告)日：2021-04-01

申请号：US17120733

申请日：2020-12-14

Applicant: Texas Instruments Incorporated

Inventor： Minhua Zhou

IPC: H04N19/167 ,  H04N19/70 ,  H04N19/61 ,  H04N19/82 ,  H04N19/103 ,  H04N19/172 ,  H04N19/117 ,  H04N19/174 ,  H04N19/176

Abstract: A method for coding a video sequence is provided that includes encoding a portion of a picture in the video sequence in lossless coding mode, and signaling a lossless coding indicator in a compressed bit stream, wherein the lossless coding indicator corresponds to the portion of a picture and indicates whether or not the portion of the picture is losslessly coded. A method for decoding a compressed video bit stream is provided that includes determining that lossless coding mode is enabled, decoding a lossless coding indicator from the compressed video bit stream, wherein the lossless coding indicator corresponds to a portion of a picture in the compressed video bit stream and indicates whether or not the portion of the picture is losslessly coded, and decoding the portion of the picture in lossless coding mode when the lossless coding indicator indicates the portion of the picture is losslessly coded.

公开(公告)号：US10805617B2

公开(公告)日：2020-10-13

申请号：US13746063

申请日：2013-01-21

Applicant: Texas Instruments Incorporated

Inventor： Minhua Zhou

IPC: H04N19/11 ,  H04N19/176 ,  H04N19/174 ,  H04N19/119 ,  H04N19/15 ,  H04N19/147 ,  H04N19/13 ,  H04N19/50

Abstract: A method for encoding a video sequence is provided that includes signaling in the compressed bit stream that a subset of a plurality of partitioning modes is used for inter-prediction of a portion of the video sequence, using only the subset of partitioning modes for prediction of the portion of the video sequence, and entropy encoding partitioning mode syntax elements corresponding to the portion of the video sequence, wherein at least one partitioning mode syntax element is binarized according to a pre-determined binarization corresponding to the subset of partitioning modes, wherein the pre-determined binarization differs from a pre-determined binarization for the least one partitioning mode syntax element that would be used if the plurality of partitioning modes is used for inter-prediction.

公开(公告)号：US10609415B2

公开(公告)日：2020-03-31

申请号：US16042583

申请日：2018-07-23

Applicant: Texas Instruments Incorporated

Inventor： Minhua Zhou

IPC: H04N19/61 ,  H04N19/13 ,  H04N19/184 ,  H04N19/463 ,  H04N19/119 ,  H04N19/172 ,  H04N19/157 ,  H04N19/124 ,  H04N19/15 ,  H04N19/625 ,  H04N19/86 ,  H04N19/174 ,  H04N19/176

Abstract: A method for encoding a picture of a video sequence in a bit stream that constrains slice header processing overhead is provided. The method includes computing a maximum slice rate for the video sequence, computing a maximum number of slices for the picture based on the maximum slice rate, and encoding the picture wherein a number of slices used to encode the picture is enforced to be no more than the maximum number of slices.

公开(公告)号：US10194155B2

公开(公告)日：2019-01-29

申请号：US15460800

申请日：2017-03-16

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Minhua Zhou

IPC: H04N19/139 ,  H04N19/52 ,  H04N19/70 ,  H04N19/61 ,  H04N19/105 ,  H04N19/124 ,  H04N19/13 ,  H04N19/159 ,  H04N19/513 ,  H04N19/577

Abstract: Methods and apparatus for parsing friendly and error resilient merge flag coding in video coding are provided. In some methods, in contrast to merging candidate list size dependent coding of the merge flag in the prior art, a merge flag is always encoded in the encoded bit stream for each inter-predicted prediction unit (PU) that is not encoded using skip mode. In some methods, in contrast to the prior art that allowed the merging candidate list to be empty, one or more zero motion vector merging candidates formatted according to the prediction type of the slice containing a PU are added to the merging candidate list if needed to ensure that the list is not empty and/or to ensure that the list contains a maximum number of merging candidates.

公开(公告)号：US20180131954A1

公开(公告)日：2018-05-10

申请号：US15864952

申请日：2018-01-08

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Minhua Zhou

IPC: H04N19/463 ,  H04N19/50 ,  H04N19/109 ,  H04N19/176 ,  H04N19/625

CPC classification number: H04N19/463 ,  H04N19/109 ,  H04N19/176 ,  H04N19/50 ,  H04N19/625

Abstract: Methods are provided for inter-prediction candidate index coding independent of the construction of the corresponding inter-prediction candidate list, i.e., a merging candidate list or an advanced motion vector predictor list. A maximum allowed number of inter-prediction candidates for an inter-prediction candidate list is used for encoding the inter-prediction candidate index in an encoded bit stream. The maximum allowed number may be pre-determined or may be selected by the encoder and encoded in the bit stream. A decoder may then decode the index using the maximum allowed number of inter-prediction candidates independent of the construction of the corresponding inter-prediction candidate list.

公开(公告)号：US09762899B2

公开(公告)日：2017-09-12

申请号：US13645324

申请日：2012-10-04

Applicant: Texas Instruments Incorporated

Inventor： Minhua Zhou

IPC: H04N19/00 ,  H04N19/433

CPC classification number: H04N19/00 ,  H04N19/433

Abstract: A method is provided that includes determining a target picture virtual memory access (VMA) bandwidth rate, wherein the target picture VMA bandwidth rate indicates a maximum VMA bandwidth rate for motion compensation of a picture, and verifying the target picture VMA bandwidth rate for a compressed video bit stream.

公开(公告)号：US20170180748A1

公开(公告)日：2017-06-22

申请号：US15451085

申请日：2017-03-06

Applicant: Texas Instruments Incorporated

Inventor： Minhua Zhou

IPC: H04N19/51 ,  H04N19/105 ,  H04N19/122 ,  H04N19/159

CPC classification number: H04N19/51 ,  H04N19/105 ,  H04N19/109 ,  H04N19/122 ,  H04N19/157 ,  H04N19/159 ,  H04N19/174 ,  H04N19/176 ,  H04N19/184 ,  H04N19/433

Abstract: Motion compensation requires a significant amount of memory bandwidth, especially for smaller prediction unit sizes. The worst case bandwidth requirements can occur when bi-predicted 4×8 or 8×4 PUs are used. To reduce the memory bandwidth requirements for such smaller PUs, methods are provided for restricting inter-coded PUs of small block sizes to be coded only in a uni-predictive mode, i.e., forward prediction or backward prediction. More specifically, PUs of specified restricted sizes in bi-predicted slices (B slices) are forced to be uni-predicted.

公开(公告)号：US09681151B2

公开(公告)日：2017-06-13

申请号：US15405142

申请日：2017-01-12

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Minhua Zhou ,  Vivienne Sze

IPC: H04N19/00 ,  H04N19/56 ,  H04N19/52

CPC classification number: H04N19/56 ,  H04N19/172 ,  H04N19/176 ,  H04N19/436 ,  H04N19/52 ,  H04N19/96

Abstract: Methods for improved parallel motion estimation are provided that decouple the merging candidate list derivation and motion estimation for merge mode and skip mode and the advanced motion vector predictor (AMVP) candidate list construction from regular motion estimation to increase the coding quality in parallel motion estimation while meeting throughput requirements. This decoupling may be accomplished by modifying the availability rules for spatial motion data (SMD) positions for construction of the candidate lists. As part of the decoupling, largest coding units (LCUs) of a picture may be divided into non-overlapping parallel motion estimation regions (PMER) of equal size. Within a PMER, motion estimation for merge mode, skip mode, and normal inter-prediction mode may be performed in parallel for all the prediction units (PUs) in the PMER.