公开(公告)号：US11800120B2

公开(公告)日：2023-10-24

申请号：US17548315

申请日：2021-12-10

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Minhua Zhou

IPC: H04N19/11 ,  H04N19/157 ,  H04N19/593 ,  H04N19/176 ,  H04N19/59

CPC classification number: H04N19/176 ,  H04N19/11 ,  H04N19/157 ,  H04N19/59 ,  H04N19/593

Abstract: A method for processing a prediction unit (PU) to generate predicted samples is provided that includes computing predicted samples for samples of the PU using sample-based angular intra-prediction (SAP) when lossless coding is enabled for the PU, and computing predicted samples for the samples of the PU using block-based angular intra-prediction when lossless coding is not enabled for the PU. Computation of the predicted using SAP includes determining an intra-prediction angle for the PU, and computing a predicted sample for each sample of the samples in the PU based on linear interpolation of two reference samples adjacent to the sample, wherein the two reference samples are selected according to the intra-prediction angle.

公开(公告)号：US20230300323A1

公开(公告)日：2023-09-21

申请号：US18201296

申请日：2023-05-24

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Minhua Zhou

IPC: H04N19/105 ,  H04N19/503 ,  H04N19/46 ,  H04N19/23 ,  H04N19/159 ,  H04N19/174 ,  H04N19/186 ,  H04N19/196

CPC classification number: H04N19/105 ,  H04N19/503 ,  H04N19/46 ,  H04N19/23 ,  H04N19/159 ,  H04N19/174 ,  H04N19/186 ,  H04N19/196

Abstract: A method for encoding a picture of a video sequence in a bit stream that reduces slice header parsing overhead is provided. The method includes determining weighting factors that may be used for weighted prediction in encoding at least one slice of the picture, wherein a total number of the weighting factors is constrained to not exceed a predetermined threshold number of weighting factors, wherein the threshold number is less than a maximum possible number of weighting factors, and signaling weighted prediction parameters including the weighting factors in a slice header in the bit stream.

公开(公告)号：US11758163B2

公开(公告)日：2023-09-12

申请号：US17748619

申请日：2022-05-19

Applicant: Texas Instruments Incorporated

Inventor： Minhua Zhou

IPC: H04N19/436 ,  H04N19/513

CPC classification number: H04N19/436 ,  H04N19/521

Abstract: A method for decoding a compressed video bit stream in a video decoder to recover a video sequence, the video decoder including a plurality of decoder processing cores is provided. The method includes determining that a picture is encoded in the compressed bit stream as a pre-determined number of independently encoded sub-pictures, and dispatching a first encoded sub-picture of the pre-determined number of sub-pictures to a first decoder processing core of the plurality of decoder processing cores and a second encoded sub-picture of the pre-determined number of sub-pictures to a second decoder processing core of the plurality of decoder processing cores, wherein the first encoded sub-picture and the second encoded sub-picture are independently decoded in parallel on the respective first and second decoder processing cores.

公开(公告)号：US11716472B2

公开(公告)日：2023-08-01

申请号：US17824554

申请日：2022-05-25

Applicant: Texas Instruments Incorporated

Inventor： Minhua Zhou

IPC: H04N19/119 ,  H04N19/157 ,  H04N19/172

CPC classification number: H04N19/119 ,  H04N19/157 ,  H04N19/172

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

公开(公告)号：US11689712B2

公开(公告)日：2023-06-27

申请号：US16807697

申请日：2020-03-03

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：US20230199201A1

公开(公告)日：2023-06-22

申请号：US18111579

申请日：2023-02-19

Applicant: Texas Instruments Incorporated

Inventor： Hyung Joon Kim ,  Minhua Zhou ,  Akira Osamoto ,  Hideo Tamama

IPC: H04N19/192 ,  H04N19/119 ,  H04N19/147 ,  H04N19/176 ,  H04N19/51 ,  H04N19/593 ,  H04N19/107 ,  H04N19/169 ,  H04N19/52

CPC classification number: H04N19/192 ,  H04N19/119 ,  H04N19/147 ,  H04N19/176 ,  H04N19/51 ,  H04N19/593 ,  H04N19/107 ,  H04N19/1883 ,  H04N19/52 ,  H04N19/103

Abstract: A method for coding unit partitioning in a video encoder is provided that includes performing intra-prediction on each permitted coding unit (CU) in a CU hierarchy of a largest coding unit (LCU) to determine an intra-prediction coding cost for each permitted CU, storing the intra-prediction coding cost for each intra-predicted CU in memory, and performing inter-prediction, prediction mode selection, and CU partition selection on each permitted CU in the CU hierarchy to determine a CU partitioning for encoding the LCU, wherein the stored intra-prediction coding costs for the CUs are used.

公开(公告)号：US11653031B2

公开(公告)日：2023-05-16

申请号：US17093695

申请日：2020-11-10

Applicant: Texas Instruments Incorporated

Inventor： Ranga Ramanujam Srinivasan ,  Chaitanya Satish Ghone ,  Mihir Narendra Mody ,  Minhua Zhou

IPC: H04N19/895 ,  H04N19/172 ,  H04N19/107 ,  H04N19/39 ,  H04N19/65

CPC classification number: H04N19/895 ,  H04N19/107 ,  H04N19/172 ,  H04N19/39 ,  H04N19/65

Abstract: A method is provided that includes receiving pictures of a video sequence in a video encoder, and encoding the pictures to generate a compressed video bit stream that is transmitted to a video decoder in real-time, wherein encoding the pictures includes selecting a picture to be encoded as a delayed duplicate intra-predicted picture (DDI), wherein the picture would otherwise be encoded as an inter-predicted picture (P-picture), encoding the picture as an intra-predicted picture (I-picture) to generate the DDI, wherein the I-picture is reconstructed and stored for use as a reference picture for a decoder refresh picture, transmitting the DDI to the video decoder in non-real time, selecting a subsequent picture to be encoded as the decoder refresh picture, and encoding the subsequent picture in the compressed bit stream as the decoder refresh picture, wherein the subsequent P-picture is encoded as a P-picture predicted using the reference picture.

公开(公告)号：US11388440B2

公开(公告)日：2022-07-12

申请号：US17404148

申请日：2021-08-17

Applicant: Texas Instruments Incorporated

Inventor： Minhua Zhou

IPC: H04N19/61 ,  H04N19/119 ,  H04N19/176 ,  H04N19/157

Abstract: A method and apparatus for a low complexity transform unit partitioning structure for High Efficiency Video Coding (HEVC). The method includes determining prediction unit size of a coding unit, and setting the size of transform unit size of Y, U and V according to the prediction unit size of the coding unit.

公开(公告)号：US11356676B2

公开(公告)日：2022-06-07

申请号：US17120733

申请日：2020-12-14

Applicant: Texas Instruments Incorporated

Inventor： Minhua Zhou

IPC: H04N19/61 ,  H04N19/70 ,  H04N19/82 ,  H04N19/103 ,  H04N19/117 ,  H04N19/167 ,  H04N19/172 ,  H04N19/174 ,  H04N19/176 ,  H04N19/12 ,  H04N19/157 ,  H04N19/124 ,  H04N19/436

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：US11350117B2

公开(公告)日：2022-05-31

申请号：US17115165

申请日：2020-12-08

Applicant: Texas Instruments Incorporated

Inventor： Minhua Zhou

IPC: H04N19/436 ,  H04N19/513

Abstract: A method for decoding a compressed video bit stream in a video decoder to recover a video sequence, the video decoder including a plurality of decoder processing cores is provided. The method includes determining that a picture is encoded in the compressed bit stream as a pre-determined number of independently encoded sub-pictures, and dispatching a first encoded sub-picture of the pre-determined number of sub-pictures to a first decoder processing core of the plurality of decoder processing cores and a second encoded sub-picture of the pre-determined number of sub-pictures to a second decoder processing core of the plurality of decoder processing cores, wherein the first encoded sub-picture and the second encoded sub-picture are independently decoded in parallel on the respective first and second decoder processing cores.