公开(公告)号：US11750806B2

公开(公告)日：2023-09-05

申请号：US17852934

申请日：2022-06-29

Applicant: Bytedance Inc.

Inventor： Weijia Zhu ,  Li Zhang ,  Jizheng Xu ,  Kai Zhang ,  Ye-kui Wang

IPC: H04N19/117 ,  H04N19/176 ,  H04N19/186 ,  H04N19/82

CPC classification number: H04N19/117 ,  H04N19/176 ,  H04N19/186 ,  H04N19/82

Abstract: A method of video processing, including performing a conversion between a video unit of a video and a bitstream representation of the video, wherein the conversion includes applying a deblocking filter to at least some samples on boundaries of the video unit, wherein deblocking quantization parameter (QP) values used in the deblocking filter are determined according to a rule, and wherein the rule specifies that whether the deblocking QP values are equal to dequantization QP values for the video unit is based on whether an adaptive color transform (ACT) mode is applied to the video unit.

公开(公告)号：US11677953B2

公开(公告)日：2023-06-13

申请号：US17330792

申请日：2021-05-26

Applicant: Beijing Bytedance Network Technology Co., Ltd. ,  Bytedance Inc.

Inventor： Weijia Zhu ,  Li Zhang ,  Jizheng Xu ,  Kai Zhang ,  Hongbin Liu ,  Yue Wang

IPC: H04N19/132 ,  H04N19/159 ,  H04N19/176 ,  H04N19/186 ,  H04N19/96

CPC classification number: H04N19/132 ,  H04N19/159 ,  H04N19/176 ,  H04N19/186 ,  H04N19/96

Abstract: Devices, systems and methods for palette mode coding are described. An exemplary method for video processing includes performing a conversion between a block of a video region of a video and a bitstream representation of the video. The bitstream representation is processed according to a first format rule that specifies whether a first indication of usage of a palette mode is signaled for the block and a second format rule that specifies a position of the first indication relative to a second indication of usage of a prediction mode for the block.

公开(公告)号：US20220385915A1

公开(公告)日：2022-12-01

申请号：US17872571

申请日：2022-07-25

Applicant: Bytedance Inc.

Inventor： Weijia Zhu ,  Li Zhang ,  Jizheng Xu

IPC: H04N19/132 ,  H04N19/105 ,  H04N19/176 ,  H04N19/70

Abstract: A method for video processing includes determining that a size of a residual block of a video is larger than a maximum block size allowed for a transform skip mode, in which, during a decoding operation, residual coefficients are decoded without performing an inverse transform operation; splitting, based on the size of a residual block, the residual block into multiple regions, wherein each region represents a portion of the residual block of a difference between a portion of a current video block and a prediction block corresponding to the portion of the current video block; and determining a reconstructed current video block from the residual block based on selectively performing the inverse transform operation according to an indicator that indicates the transform skip mode.

公开(公告)号：US20220385898A1

公开(公告)日：2022-12-01

申请号：US17856631

申请日：2022-07-01

Applicant: Bytedance Inc.

Inventor： Weijia Zhu ,  Li Zhang ,  Jizheng Xu ,  Kai Zhang ,  Ye-kui Wang

IPC: H04N19/117 ,  H04N19/157 ,  H04N19/70 ,  H04N19/136 ,  H04N19/186 ,  H04N19/174 ,  H04N19/172

Abstract: A method of video processing comprises performing a conversion between a video unit of a video and a bitstream of the video according to a rule, wherein the rule specifies that whether a cross-component adaptive loop filter (CC-ALF) mode and an adaptive loop filter (ALF) mode are enabled for coding the video unit are indicated in the bitstream in a mutually independent manner.

公开(公告)号：US11503344B2

公开(公告)日：2022-11-15

申请号：US17671422

申请日：2022-02-14

Applicant: Bytedance Inc.

Inventor： Weijia Zhu ,  Jizheng Xu ,  Li Zhang ,  Hsiao Chiang Chuang

IPC: H04N19/70 ,  H04N19/132 ,  H04N19/176 ,  H04N19/186

Abstract: Methods, systems, and devices for performing entropy coding for the palette escape symbol in palette mode coding and decoding are described. An example method for video processing includes performing a conversion between a video comprising one or more video regions comprising a current video block and a bitstream representation of the video, wherein the bitstream representation conforms to a format rule that the current video block is coded using a palette mode coding tool, wherein a binarization of an escape symbol for the current video block uses an exponential-Golomb (EG) code of order K, wherein K is a non-negative integer that is unequal to three, and wherein the palette mode coding tool represents the current video block using a palette of representative color values and wherein the escape symbol is used for a sample of the current video block coded without using the representative color values.

公开(公告)号：US11431966B2

公开(公告)日：2022-08-30

申请号：US17502233

申请日：2021-10-15

Applicant: Bytedance Inc.

Inventor： Weijia Zhu ,  Li Zhang ,  Jizheng Xu ,  Hsiao Chiang Chuang

IPC: H04N19/159 ,  H04N19/176 ,  H04N19/105 ,  H04N19/70

Abstract: Video coding and decoding methods are described. In example method includes performing a conversion between a current video block of a video and a bitstream representation of the current video block by determining a first intra coding mode to be stored which is associated with the current video block using a differential coding mode, where the first intra coding mode associated with the current video block is determined according to a second prediction mode used by the differential coding mode, and where, in the differential coding mode, a difference between a quantized residual of an intra prediction of the current video block and a prediction of the quantized residual is represented in the bitstream representation for the current video block using a differential pulse coding modulation (DPCM) representation.

公开(公告)号：US12278949B2

公开(公告)日：2025-04-15

申请号：US18321426

申请日：2023-05-22

Applicant: Beijing Bytedance Network Technology Co., Ltd. ,  Bytedance Inc.

Inventor： Li Zhang ,  Jizheng Xu ,  Kai Zhang ,  Hongbin Liu ,  Weijia Zhu ,  Yue Wang

IPC: H04N19/105 ,  H04N19/176 ,  H04N19/186 ,  H04N19/189

Abstract: A method of video processing includes determining, for a conversion between a video component of a video comprising a current video block and a bitstream representation of the video, that a first coding tool is used based on a rule for the current video block; and performing the conversion according to the determining, wherein the first coding tool includes transforming a representation of a visual signal between two color spaces, and where the rule specifies that a first quantization parameter (QP) offset for a luma channel of the current video block is equal to K1 and a second QP offset for a first chroma channel of the current video block is K1+O, where K1 and O are integers.

公开(公告)号：US12231693B2

公开(公告)日：2025-02-18

申请号：US18485088

申请日：2023-10-11

Applicant: Bytedance Inc.

Inventor： Weijia Zhu ,  Jizheng Xu ,  Li Zhang ,  Hsiao Chiang Chuang

IPC: H04N19/70 ,  H04N19/132 ,  H04N19/176 ,  H04N19/186

Abstract: Methods, systems, and devices for performing entropy coding for a palette escape symbol in palette mode coding and decoding are described. An example method for video processing includes performing a conversion between a video having one or more video regions including a current video block and a bitstream representation of the video, wherein the bitstream representation conforms to a format rule that the current video block is coded using a palette mode coding tool, wherein a binarization of an escape symbol for the current video block uses an exponential-Golomb (EG) code of order K, wherein K is a non-negative integer that is unequal to three, and wherein the palette mode coding tool represents the current video block using a palette of representative color values and wherein the escape symbol is used for a sample of the current video block coded without using the representative color values.

公开(公告)号：US20250047855A1

公开(公告)日：2025-02-06

申请号：US18896281

申请日：2024-09-25

Applicant: Beijing Bytedance Network Technology Co., Ltd. ,  Bytedance Inc.

Inventor： Li Zhang ,  Jizheng Xu ,  Kai Zhang ,  Hongbin Liu ,  Weijia Zhu

IPC: H04N19/13 ,  H04N19/176 ,  H04N19/70

Abstract: Method of processing video data is disclosed. A method for video processing includes dividing, for a conversion between a block of a video and a bitstream of the block, syntax elements associated with the block into different groups of syntax elements; applying controls on the different groups of syntax elements separately; and performing the conversion based on the controls.

公开(公告)号：US12206850B2

公开(公告)日：2025-01-21

申请号：US17944876

申请日：2022-09-14

Applicant: Bytedance Inc.

Inventor： Weijia Zhu ,  Li Zhang ,  Jizheng Xu

IPC: H04N19/124 ,  H04N19/159 ,  H04N19/176 ,  H04N19/70

Abstract: A method of video processing is described. The method includes performing a conversion between a current video block of a video and a coded representation of the current video block according to a rule, wherein the rule specifies that, due to use of an identity transform coding tool for representing the current video block into the coded representation, a syntax field indicative of a quantization parameter used for decoding the current video block is included such that a value of the quantization parameter is modified according to a rule, wherein the identity transform coding tool allows coefficient values at a transform domain of the current block to be same as values of a residual block of the current video block.