公开(公告)号：US11736722B2

公开(公告)日：2023-08-22

申请号：US17692929

申请日：2022-03-11

Applicant: Bytedance Inc.

Inventor： Li Zhang ,  Weijia Zhu ,  Jizheng Xu

IPC: H04N19/46 ,  H04N19/593 ,  H04N19/105 ,  H04N19/132 ,  H04N19/176 ,  H04N19/186 ,  H04N19/169 ,  G06T9/00 ,  G06T11/00 ,  G06T11/40 ,  H04N19/119 ,  H04N19/159 ,  G06V10/20

CPC classification number: H04N19/593 ,  G06T9/004 ,  G06T11/001 ,  G06T11/40 ,  G06V10/20 ,  H04N19/105 ,  H04N19/119 ,  H04N19/132 ,  H04N19/159 ,  H04N19/176 ,  H04N19/186 ,  H04N19/1883 ,  H04N19/46

Abstract: In one example aspect, a method of video processing includes performing a conversion between a current block in video unit of a video and a bitstream of the video using a palette mode in which a palette of representative sample values is used for coding the current block. During the conversion, a predictor palette is used for predicting the palette of representative sample values, and wherein a size of the predictor palette is adaptively adjusted according to a rule.

公开(公告)号：US11616978B2

公开(公告)日：2023-03-28

申请号：US17360902

申请日：2021-06-28

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

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

IPC: H04N19/56 ,  H04N19/139 ,  H04N19/176 ,  H04N19/52 ,  H04N19/105 ,  H04N19/147 ,  H04N19/513 ,  H04N19/537 ,  H04N19/137 ,  H04N19/543 ,  H04N19/132 ,  H04N19/567

Abstract: Methods, systems and device for hash-based motion estimation in video coding are described. An exemplary method of video processing includes determining, for a conversion between a current block of a video and a bitstream representation of the video, motion information associated with the current block using a hash-based motion search, a size of the current block being M×N, M and N being positive integers and M being not equal to N, applying, based on the motion information and a video picture comprising the current block, a prediction for the current block, and performing, based on the prediction, the conversion.

公开(公告)号：US20230051883A1

公开(公告)日：2023-02-16

申请号：US17965325

申请日：2022-10-13

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：US20230012847A1

公开(公告)日：2023-01-19

申请号：US17866036

申请日：2022-07-15

Applicant: Bytedance Inc.

Inventor： Weijia Zhu ,  Li Zhang ,  Jizheng Xu

IPC: H04N19/105 ,  H04N19/176 ,  H04N19/46 ,  H04N19/96

Abstract: Devices, systems and methods for coefficient coding in transform skip mode are described. An exemplary method for video processing includes determining, for encoding one or more video blocks in a video region of a visual media data into a bitstream representation of the visual media data, a maximum allowed dimension up to which a current video block of the one or more video blocks is allowed to be encoded using a transform skip mode such that a residual of a prediction error between the current video block and a reference video block is represented in the bitstream representation without applying a transform; and including a syntax element indicative of the maximum allowed dimension in the bitstream representation.

公开(公告)号：US20220400252A1

公开(公告)日：2022-12-15

申请号：US17888956

申请日：2022-08-16

Applicant: Bytedance Inc.

Inventor： Weijia Zhu ,  Li Zhang ,  Jizheng Xu

IPC: H04N19/105 ,  H04N19/132 ,  H04N19/186 ,  H04N19/176 ,  H04N19/70

Abstract: A method includes deriving, for a current video block of a video that is a chroma block and coded in a chroma derived mode (DM), an intra prediction mode for the current video block according to a rule related to a coding mode of the current video block; and performing a conversion between the current video block and a coded presentation of the video, wherein the rule specifies to derive the intra prediction mode based on an intra prediction direction of a corresponding luma block used to derive the chroma DM mode and coded using a block differential pulse code modulation representation of a quantized residual block corresponding to the current video block.

公开(公告)号：US20220377333A1

公开(公告)日：2022-11-24

申请号：US17867284

申请日：2022-07-18

Applicant: BEIJING BYTEDANCE NETWORK TECHNOLOGY CO., LTD. ,  Bytedance Inc.

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

IPC: H04N19/12 ,  H04N19/60 ,  H04N19/176 ,  H04N19/85 ,  H04N19/196 ,  H04N19/186

Abstract: A method for implementing an adaptive colour transform (ACT) mode during image/video encoding and decoding includes performing a conversion between a current video block of a video and a bitstream of the video, wherein the current video block is coded using the ACT mode, wherein the conversion comprises applying an inverse ACT transform on the current video block according to a rule, and wherein the rule specifies that a clipping operation, based on a bit depth of the current video block, is applied to an input of the inverse ACT transform.

公开(公告)号：US11438597B2

公开(公告)日：2022-09-06

申请号：US17411296

申请日：2021-08-25

Applicant: Bytedance Inc.

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

IPC: H04N19/132 ,  H04N19/159 ,  H04N19/70 ,  H04N19/186 ,  H04N19/176 ,  H04N19/11 ,  H04N19/124 ,  H04N19/182 ,  H04N19/593 ,  H04N19/105 ,  H04N19/59

Abstract: Video coding and decoding methods are described. An example method includes determining, based on an applicability rule, that a differential coding mode is applicable to a conversion between a chroma video block of a video and a bitstream representation of the chroma video block, and performing, based on the determining, the conversion between the chroma video block and the bitstream representation of the chroma video block using the differential coding mode, where the chroma video block is represented in the bitstream representation using a difference between a quantized residual of an intra prediction of the chroma video block and a prediction of the quantized residual in the differential coding mode, where the intra prediction is performed in a first direction and the prediction of the quantized residual is performed in a second direction, and where the difference is represented using a differential pulse coding modulation (DPCM) representation.

公开(公告)号：US12231680B2

公开(公告)日：2025-02-18

申请号：US17692782

申请日：2022-03-11

Applicant: Bytedance Inc.

Inventor： Li Zhang ,  Weijia Zhu ,  Jizheng Xu

IPC: H04N19/593 ,  G06T9/00 ,  G06T11/00 ,  G06T11/40 ,  G06V10/20 ,  H04N19/105 ,  H04N19/119 ,  H04N19/132 ,  H04N19/159 ,  H04N19/169 ,  H04N19/176 ,  H04N19/186 ,  H04N19/46 ,  H04N19/70

Abstract: In one example aspect, a method of video processing includes performing a conversion between a current block of a video and a bitstream of the video using a palette mode in which a palette of representative sample values is used for coding the current block. During the conversion, one or multiple predictor palettes are used for predicting the palette of representative sample values, and wherein updating of the one or multiple predictor palettes after the conversion of the current block is disabled according to a rule based on a characteristic of the current block.

公开(公告)号：US12126802B2

公开(公告)日：2024-10-22

申请号：US17473440

申请日：2021-09-13

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

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

IPC: H04N19/122 ,  H04N19/105 ,  H04N19/119 ,  H04N19/13 ,  H04N19/14 ,  H04N19/157 ,  H04N19/176 ,  H04N19/60 ,  H04N19/70

CPC classification number: H04N19/122 ,  H04N19/105 ,  H04N19/119 ,  H04N19/13 ,  H04N19/14 ,  H04N19/157 ,  H04N19/176 ,  H04N19/60 ,  H04N19/70

Abstract: A method for video processing includes applying a sub-block residual coding scheme to a current video block, wherein the residual of the current video block is split into a plurality of sub-blocks each having a size of M*N, determining at least one sub-block with non-zero coefficients based on characteristic associated with each of the plurality of sub-blocks; coding the residue of the current video block based on the derived at least one sub-block with non-zero coefficients.

公开(公告)号：US12113986B2

公开(公告)日：2024-10-08

申请号：US17551392

申请日：2021-12-15

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

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

IPC: H04N19/139 ,  H04N19/159 ,  H04N19/176 ,  H04N19/593 ,  H04N19/96

CPC classification number: H04N19/139 ,  H04N19/159 ,  H04N19/176 ,  H04N19/593 ,  H04N19/96

Abstract: Interaction between screen content coding tools and motion information is disclosed. A method of video processing includes modifying, for a conversion between a block of a video and a bitstream representation of the block, at least one of motion information associated with the block which is coded with intra block copy (IBC) mode; and performing the conversion based on the modified motion information.