公开(公告)号：US20220248063A1

公开(公告)日：2022-08-04

申请号：US17716447

申请日：2022-04-08

Applicant: Bytedance Inc.

Inventor： Weijia ZHU ,  Li ZHANG ,  Jizheng XU ,  Kai ZHANG

IPC: H04N19/82 ,  H04N19/186 ,  H04N19/117 ,  H04N19/70

Abstract: An example method of video processing includes making a determination, for a conversion between a current video block of a video and a bitstream representation of the video, whether a cross-component adaptive loop filtering tool is enabled for the current video block based on a color property of the video. The method also includes performing the conversion according to the determination.

公开(公告)号：US20220217363A1

公开(公告)日：2022-07-07

申请号：US17700086

申请日：2022-03-21

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

Inventor： Kai ZHANG ,  Li ZHANG ,  Hongbin LIU ,  Yue WANG

IPC: H04N19/176 ,  H04N19/107 ,  H04N19/583 ,  H04N19/132 ,  H04N19/139 ,  H04N19/159 ,  H04N19/167 ,  H04N19/105 ,  H04N19/117 ,  H04N19/119

Abstract: A method of decoding visual information from a coded representation of the visual information includes determining that a block being decoded representing a portion of an encoded picture of visual information is coded using a motion candidate associated with a motion vector, wherein the motion vector is derived as a weighted average of a plurality of motion vectors, wherein all of the plurality of motion vectors refer to a same picture type, and wherein a first picture type represents a current picture and a second picture type represents a reference pictures different from the current picture and decoding the block being decoded by using the motion candidate.

公开(公告)号：US20220210447A1

公开(公告)日：2022-06-30

申请号：US17692782

申请日：2022-03-11

Applicant: Bytedance Inc.

Inventor： Li ZHANG ,  Weijia ZHU ,  Jizheng XU

IPC: H04N19/186 ,  H04N19/159 ,  H04N19/176 ,  H04N19/169

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：US20220210444A1

公开(公告)日：2022-06-30

申请号：US17386519

申请日：2021-07-27

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

Inventor： Jizheng XU ,  Li ZHANG ,  Kai ZHANG ,  Hongbin LIU ,  Yue WANG

IPC: H04N19/176 ,  H04N19/174 ,  H04N19/52 ,  H04N19/593

Abstract: A method of visual media processing includes determining a size of a buffer to store reference samples for prediction in an intra block copy mode; and performing a conversion between a current video block of visual media data and a bitstream of the current video block, using the reference samples stored in the buffer, wherein the conversion is performed in the intra block copy mode which is based on motion information related to a reconstructed block located in same video region with the current video block without referring to a reference picture.

公开(公告)号：US20220191549A1

公开(公告)日：2022-06-16

申请号：US17689709

申请日：2022-03-08

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

Inventor： Li ZHANG ,  Kai ZHANG ,  Jizheng XU ,  Hongbin LIU

IPC: H04N19/70 ,  H04N19/176 ,  H04N19/159 ,  H04N19/124 ,  H04N19/593

Abstract: A method of video processing includes determining, for a conversion between a current block of a video and a coded representation of the video, whether a syntax element indicating usage of a skip mode for an intra-block copy (IBC) coding model is included in the coded representation according to a rule that specifies that signaling of the syntax element is based on a dimension of the current block and/or a maximum allowed dimension for a block that is coded using the IBC coding model. The method also includes performing the conversion based on the determining.

公开(公告)号：US20220182667A1

公开(公告)日：2022-06-09

申请号：US17651975

申请日：2022-02-22

Applicant: Beijing Bytedance Network Technology Co., Ltd. ,  Bytedance Inc. ,  Bytedance (HK) Limited

Inventor： Junru LI ,  Meng WANG ,  Li ZHANG ,  Kai ZHANG ,  Hongbin LIU ,  Yue WANG ,  Shiqi WANG

IPC: H04N19/593 ,  H04N19/186 ,  H04N19/132 ,  H04N19/176 ,  H04N19/105 ,  H04N19/159

Abstract: A video processing method includes performing a conversion between a video including a video unit and a coded representation of the video, where, after the video unit is encoded or decoded with an intra prediction mode, one or more frequence tables and/or one or more sorted intra prediction mode (IPM) tables are selectively updated according to a rule, where the one or more frequence tables include information about frequence of the intra prediction mode used for processing the video unit in the conversion, where the frequence indicates an occurrence of the intra prediction mode used for the conversion, and where the one or more sorted IPM tables indicate the intra prediction mode used in the processing.

公开(公告)号：US20220182655A1

公开(公告)日：2022-06-09

申请号：US17671486

申请日：2022-02-14

Applicant: Bytedance Inc.

Inventor： Weijia ZHU ,  Jizheng XU ,  Li ZHANG ,  Hsiao Chiang CHUANG

IPC: H04N19/50 ,  H04N19/186 ,  H04N19/176 ,  H04N19/136 ,  H04N19/132 ,  H04N19/169 ,  H04N19/159 ,  H04N19/119 ,  H04N19/124 ,  H04N19/70

Abstract: Methods, systems, and devices for using palette mode with different partition structures are described. An example method for video processing includes maintaining, for a conversion between a video comprising one or more video regions comprising a current video block and a bitstream representation of the video, a palette prediction table for a prediction of a palette used in a palette mode coding tool used for the current video block, making a determination that a local dual tree coding is applied to the conversion, modifying, based on the determination, the palette prediction table, and performing, based on the palette prediction table subsequent to the modifying, the conversion, wherein the palette mode coding tool represents the current video block using a palette of representative color values, and wherein the local dual tree coding enables partitioning of chroma blocks independently from corresponding luma blocks based on a block size.

公开(公告)号：US20220174310A1

公开(公告)日：2022-06-02

申请号：US17386497

申请日：2021-07-27

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

Inventor： Jizheng XU ,  Li ZHANG ,  Kai ZHANG ,  Hongbin LIU ,  Yue WANG

IPC: H04N19/52 ,  H04N19/176 ,  H04N19/593

Abstract: A method of visual media processing includes determining a size of a buffer to store reference samples for prediction in an intra block copy mode; and performing a conversion between a current video block of visual media data and a bitstream of the current video block, using the reference samples stored in the buffer, wherein the conversion is performed in the intra block copy mode which is based on motion information related to a reconstructed block located in same video region with the current video block without referring to a reference picture.

公开(公告)号：US20220159259A1

公开(公告)日：2022-05-19

申请号：US17585788

申请日：2022-01-27

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

Inventor： Kui FAN ,  Li ZHANG ,  Kai ZHANG ,  Hongbin LIU ,  Yue WANG

IPC: H04N19/13 ,  H04N19/96 ,  H04N19/60 ,  H04N19/176 ,  H04N19/70

Abstract: A video processing method is described. The method includes performing a conversion between a video region of a video and a coded representation of the video, wherein the performing of the conversion includes configuring, based on a partition type of the video region, a context model for coding a first bin, the first bin and a second bin included in a bin string corresponding to an index of a secondary transform tool, wherein the index indicates an applicability of the secondary transform tool and/or a kernel information of the secondary transform tool, and 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 to the video block before applying an inverse primary transform.

公开(公告)号：US20220159255A1

公开(公告)日：2022-05-19

申请号：US17589483

申请日：2022-01-31

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

Inventor： Jizheng XU ,  Zhipin DENG ,  Li ZHANG ,  Hongbin LIU

IPC: H04N19/119 ,  H04N19/96 ,  H04N19/132 ,  H04N19/159 ,  H04N19/186 ,  H04N19/176

Abstract: A method of video processing is provided to include: performing a conversion between a video comprising one or more video regions comprising one or more luma blocks and one or more chroma blocks and a coded representation of the video according to a rule; wherein the rule specifies that a chroma block from the one or more chroma blocks having a size M×N is disallowed to be represented in the coded representation using an intra mode or an intra block copy mode, wherein M and N are integers that indicate a width and a height of the chroma block, respectively; wherein the intra mode includes encoding the chroma block based on previously encoded or reconstructed video blocks, and wherein the intra block copy mode includes encoding the chroma block using at least a block vector pointing to a video frame containing a video region.