公开(公告)号：US20250142054A1

公开(公告)日：2025-05-01

申请号：US19010549

申请日：2025-01-06

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

Inventor： Kai Zhang ,  Li Zhang ,  Hongbin Liu ,  Zhipin Deng ,  Jizheng Xu ,  Yue Wang

IPC: H04N19/105 ,  H04N19/132 ,  H04N19/159 ,  H04N19/176 ,  H04N19/186 ,  H04N19/70

Abstract: An example method of video processing includes determining, for a conversion between a current picture of a video and a coded representation of the video, a position of a reference sample in a reference picture that is associated with the current picture based on a top-left position of a window of a picture. The picture includes at least the current picture or the reference picture, and the window is subject to a processing rule during the conversion. The method also includes performing the conversion based on the determining.

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：US12273525B2

公开(公告)日：2025-04-08

申请号：US17652204

申请日：2022-02-23

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

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

IPC: H04N19/00 ,  H04N19/105 ,  H04N19/132 ,  H04N19/169 ,  H04N19/176 ,  H04N19/52 ,  H04N19/56 ,  H04N19/70

Abstract: A method of video processing is described. The method of video processing includes: performing a conversion between a video comprising video blocks and a coded representation of the video; wherein the coded representation conforms to a format rule, wherein the format rule specifies that context adaptive coding of a block vector predictor (BVP) index of a first video block coded using a block vector (BV) prediction mode and an index for inter mode coding used for coding a second video block is performed by sharing a same context; wherein the BVP index is to an entry in a history-based motion vector predictor list used for generating a block vector predictor for the first video block.

公开(公告)号：US12262006B2

公开(公告)日：2025-03-25

申请号：US17824386

申请日：2022-05-25

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

Inventor： Yang Wang ,  Li Zhang ,  Hongbin Liu ,  Kai Zhang ,  Kui Fan ,  Yue Wang

IPC: H04N19/117 ,  H04N19/119 ,  H04N19/176 ,  H04N19/186

Abstract: A method of video processing, including performing a conversion between a video block of a video component of a video and a bitstream of the video, where the video block includes sub-blocks, where a filtering tool is used during the conversion according to a rule, and where the rule specifies that the filtering tool is applied by using a single offset for all samples of each sub-block of the video block.

公开(公告)号：US12238306B2

公开(公告)日：2025-02-25

申请号：US18528017

申请日：2023-12-04

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

Inventor： Kai Zhang ,  Li Zhang ,  Hongbin Liu ,  Yue Wang

IPC: H04N19/52 ,  H04N19/119 ,  H04N19/136 ,  H04N19/176 ,  H04N19/186 ,  H04N19/55

Abstract: Devices, systems and methods for sub-block based prediction are described. In a representative aspect, a method for video encoding includes partitioning, based on a first rule, a luma component of a block of video data into a first set of sub-blocks. The method also includes partitioning, based on a second rule, a first chroma component of the block of video data into a second set of sub-blocks. The first and the second set of sub-blocks include different numbers of sub-blocks. The method also includes performing a subsequent motion prediction based on the first and the second set of sub-blocks.

公开(公告)号：US12238305B2

公开(公告)日：2025-02-25

申请号：US18492937

申请日：2023-10-24

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

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

IPC: H04N19/00 ,  H04N19/117 ,  H04N19/159 ,  H04N19/186 ,  H04N19/70

Abstract: A method for video processing is provided to include: performing a conversion between a current video block of a video and a coded representation of current video block, wherein the conversion uses a coding mode in which the current video block is constructed based on a first domain and a second domain and/or chroma residue is scaled in a luma-dependent manner, and wherein information used for the coding mode is signaled in a parameter set that is different from a sequence parameter set (SPS), a video parameter set (VPS), a picture parameter set (PPS), or an adaptation parameter set (APS) used for carrying adaptive loop filtering (ALF) parameters.

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：US20250024065A1

公开(公告)日：2025-01-16

申请号：US18895908

申请日：2024-09-25

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

Inventor： Hongbin Liu ,  Li Zhang ,  Kai Zhang ,  Yue Wang

IPC: H04N19/513 ,  H04N19/176

Abstract: A method for video processing is provided. The method includes making a determination, for a conversion between a current video block of a video and a coded representation of the current video block, of whether to use a symmetric motion vector difference (SMVD) mode based on a currently selected best mode for the conversion; and performing the conversion based on the determining.

公开(公告)号：US12184865B2

公开(公告)日：2024-12-31

申请号：US18310344

申请日：2023-05-01

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

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

IPC: H04N19/149 ,  H04N19/105 ,  H04N19/11 ,  H04N19/132 ,  H04N19/159 ,  H04N19/176 ,  H04N19/184 ,  H04N19/186 ,  H04N19/189 ,  H04N19/30 ,  H04N19/42 ,  H04N19/50 ,  H04N19/593 ,  H04N19/70

Abstract: A method for video processing is provided. The method includes determining, for a conversion between a current video block of a video that is a chroma block and a coded representation of the video, multiple sets of parameters, wherein each set of parameters defines a cross-component linear model (CCLM) and is derived from a corresponding group of chroma samples at corresponding chroma sample positions; determining, based on the multiple sets of parameters, parameters for a final CCLM; and performing the conversion based on the final CCLM.

公开(公告)号：US12166968B2

公开(公告)日：2024-12-10

申请号：US17895511

申请日：2022-08-25

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

Inventor： Zhipin Deng ,  Kai Zhang ,  Li Zhang ,  Hongbin Liu ,  Jizheng Xu

IPC: H04N19/132 ,  H04N19/105 ,  H04N19/159 ,  H04N19/176 ,  H04N19/70

Abstract: Devices, systems and methods for digital video coding, which includes matrix-based intra prediction methods for video coding, are described. In a representative aspect, a method for video processing includes performing a conversion between a current video block of a video and a bitstream representation of the current video block according to a rule, where the rule specifies a relationship between samples of the current video block and matrices or offset values applied in a matrix weighted intra prediction (MIP) mode during the conversion, and where the MIP mode includes determining a prediction block of the current video block by performing, on previously coded samples of the video, a boundary downsampling operation, followed by a matrix vector multiplication operation, and selectively followed by an upsampling operation.