公开(公告)号：US20230091563A1

公开(公告)日：2023-03-23

申请号：US17994092

申请日：2022-11-25

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

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

IPC: H04N19/82 ,  H04N19/117 ,  H04N19/119 ,  H04N19/159 ,  H04N19/176 ,  H04N19/61 ,  H04N19/86

Abstract: Devices, systems and methods for digital video coding. A method for video processing includes determining whether to apply and how to apply a filtering process for samples of a current video unit of a video based on whether the samples are located at predefined transform boundaries; and performing a conversion between the video and a bitstream representation of the video based on the determining, where the predefined transform boundaries are determined based on a first transform mode in which a transform region is split into multiple transform sub-regions and only one transform sub-region has a non-zero residual sample.

公开(公告)号：US11611779B2

公开(公告)日：2023-03-21

申请号：US17400512

申请日：2021-08-12

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

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

IPC: H04N19/61 ,  H04N19/70 ,  H04N19/176 ,  H04N19/186 ,  H04N19/11 ,  H04N19/12 ,  H04N19/124 ,  H04N19/46

Abstract: A video processing method is provided to comprise: performing a conversion between a current video block of a video and a coded representation of the current video block, wherein the coded representation conforms to a format rule specifying that a syntax element corresponding to side information of a secondary transform tool for the current video block is signaled in the coded representation before transform related information, wherein the secondary transform tool includes applying, during encoding, a forward secondary transform to an output of a forward primary transform applied to a residual of a video block prior to quantization, or applying, during decoding, an inverse secondary transform to an output of dequantization of the video block before applying an inverse primary transform.

公开(公告)号：US11606570B2

公开(公告)日：2023-03-14

申请号：US17731472

申请日：2022-04-28

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

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

IPC: H04N19/11 ,  H04N19/176 ,  H04N19/186 ,  H04N19/124 ,  H04N19/136 ,  H04N19/157 ,  H04N19/593 ,  H04N19/61 ,  H04N19/70 ,  H04N19/82

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 generating, for a conversion between a current video block of a video including multiple video blocks and a bitstream representation of the video, a most probable mode (MPM) list for a matrix based intra prediction (MIP) tool based on a rule, where, the MIP tool includes determining, during the conversion, 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, and where the rule specifies a mapping between a number of MIP modes and dimensions of the multiple video blocks; and performing the conversion based on the generating.

公开(公告)号：US20230075048A1

公开(公告)日：2023-03-09

申请号：US17968536

申请日：2022-10-18

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

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

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

Abstract: A method of video processing is provided to include determining, for a conversion between a video block of a video and a bitstream of the video, a parameter of a cross-component linear model (CCLM) for the video block according to a rule, and performing the conversion based on the determining, and wherein the rule specifies to use a variable representing a neighbouring luma sample in the determining of the parameter of the CCLM only in case that the variable has a certain value.

公开(公告)号：US20230069756A1

公开(公告)日：2023-03-02

申请号：US17968510

申请日：2022-10-18

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

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

IPC: H04N19/11 ,  H04N19/136 ,  H04N19/186 ,  H04N19/593 ,  H04N19/124

Abstract: A method of video processing is provided to include determining, for a conversion between a video block of a video having a 4:2:2 color format and a bitstream of the video, a parameter of a cross-component linear model for the video block according to a rule and performing the conversion based on the determining, wherein a syntax element indicates whether chroma samples of the video are vertically shifted relative to luma samples of the video and wherein the rule specifies that the parameter is determined independent of a value of the syntax element.

公开(公告)号：US20230067372A1

公开(公告)日：2023-03-02

申请号：US17975005

申请日：2022-10-27

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

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

IPC: H04N19/52 ,  H04N19/176 ,  H04N19/184

Abstract: A video processing method includes generating, for a conversion between a current block of a video and a bitstream representation of the video, a motion vector for the current block; invoking a weighted prediction processing tool or a second processing tool in a mutually exclusive manner; and performing the conversion according to the invoking. The invoking of the second processing tool comprises refining the motion vector.

公开(公告)号：US20230063887A1

公开(公告)日：2023-03-02

申请号：US17964396

申请日：2022-10-12

Applicant: Bytedance Inc.

Inventor： Ye-kui Wang ,  Li Zhang ,  Kai Zhang

IPC: H04N19/172 ,  H04N19/169 ,  H04N19/136 ,  H04N19/105 ,  H04N19/107 ,  H04N19/174 ,  H04N19/70 ,  H04N19/30

Abstract: Methods and apparatus for video processing are described. The processing may include video encoding, video decoding, or video transcoding. An example video processing method includes performing a conversion between a video including one or more pictures including one or more subpictures and a bitstream of the video. The one or more pictures and/or the one or more subpictures are included into the bitstream according to an order rule. The order rule specifies a relationship between a position of a current instantaneous decoder refresh (IDR) picture or a current IDR subpicture in the bitstream with respect to another picture referred to by an entry in a reference picture list for a current slice of the current IDR picture or the current IDR subpicture.

公开(公告)号：US20230063736A1

公开(公告)日：2023-03-02

申请号：US17968553

申请日：2022-10-18

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

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

IPC: H04N19/132 ,  H04N19/105 ,  H04N19/80 ,  H04N19/186 ,  H04N19/176 ,  H04N19/70

Abstract: A method of video processing is provided. The method includes determining, for a conversion between a video comprising a video unit and a bitstream of the video, whether a first coding tool is enabled for the video unit according to a rule. The rule specifies that the first coding tool and a second coding tool are mutually exclusively enabled. The first coding tool or the second coding tool comprises a sign data hiding tool. The method also includes performing the conversion according to the determining.

公开(公告)号：US11595687B2

公开(公告)日：2023-02-28

申请号：US17338601

申请日：2021-06-03

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

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

IPC: H04N19/00 ,  H04N19/593 ,  H04N19/176 ,  H04N19/186

Abstract: A method for video processing is provided. The method includes performing downsampling on chroma and luma samples of a neighboring block of the current video block; determining, for a conversion between a current video block of a video that is a chroma block and a coded representation of the video, parameters of cross-component linear model (CCLM) based on the downsampled chroma and luma samples obtained from the downsampling; applying the CCLM on luma samples located in a luma block corresponding to the current video block to derive prediction values of the current video block; and performing the conversion based on the prediction values.

公开(公告)号：US11595683B2

公开(公告)日：2023-02-28

申请号：US17139200

申请日：2020-12-31

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

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

IPC: H04N19/52 ,  H04N19/176

Abstract: Devices, systems and methods for constructing low-complexity non-adjacent merge candidates. In a representative aspect, a method for video processing includes receiving a current block of video data, selecting, based on a rule, a first non-adjacent block that is not adjacent to the current block, constructing a first merge candidate comprising motion information based on the first non-adjacent block, identifying a second non-adjacent block that is not adjacent to the current block and different from the first non-adjacent block, based on determining that the second non-adjacent block fails to satisfy the rule, refraining adding a second merge candidate derived from the second non-adjacent block, constructing a merge candidate list based on the first non-adjacent block, and decoding the current block based on the merge candidate list.