Bytedance Inc.

Beijing Bytedance Network Technology Co., Ltd.

Qualcomm Incorporated

Tencent Technology (shenzhen) Company Limited

Lemon Inc.

Other

Oatey Company

Zimmer Gmbh

Huawei Technologies Co., Limited

Nanjing Tech University

Hon Hai Precision Industry Co., Ltd.

Hong-fu Jin Precision Industry (shenzhen) Co., Ltd.

Byd Company Limited

Huawei Device Co., Ltd.

The Methodist Hospital

Kai Zhang

Li Feng Zhang

Hongbin Liu

Yue Wang

Jizheng Xu

Zhipin Deng

Ye-Kui Wang

Weijia Zhu

Yang Wang

Marta Karczewicz

Na Zhang

Jianle Chen

Ying Huang

Bo Hu

Xi Wang

Cheng Feng

Yulei Liu

Kui Fan

Tingyong Tang

Wei-Jung Chien

Huijiao Yang

Ruiyi Zhou

Wei Li

Zhipei Wang

Bosen He

Zhengkai Xie

Saeed Nikayin

Gilbert Loera

Xin Qing

Xiang Yang Li

Yue Li

Yuwen He

Hsiao Chiang Chuang

Sha Mo

Sirui Liu

Junru Li

Xin Zhao

Yi-Wen Chen

Hsiao-Chiang Chuang

Siwei Ma

Andrew Hyungwoo Choi

Renfang Liu

Lei Guan

Ning Ma

Hao Tang

Brian H Thomas

Aaron Lorkowski

Lidong Qin

Yingge Li

Yu-Chen Sun

Tianliang Fu

Kenneth Brown

Xiang Li

Meng Wang

Done Bugdayci Sansli

Pingkai Ouyang

Shiqi Wang

Jiahao Li

Kai Guo

Ke Wang

Zheng Fang

Michael Niesman

Michael E Hawkins

Dong Bo Zhao

Lei Zheng

Yu Han

Hallie E Brinkerhuff

Ning Zhu

Danzhi Chen

Vadim Seregin

Hao Wu

Yang Li

Lan Zou

Hui Zhang

Wei He

Amir Said

Robert A Hodorek

Qi Yu

Vijayaraghavan Thirumalai

Cheng-Teh Hsieh

Ping Chen

Jun Huang

Haitao Xia

Sungwon Lee

Wenjiao Lin

Ping Song

Dirk Pletcher

Shaochun Zhuang

Zhenan Guan

Ge Chen

Willie Perez

Fengxin Wang

Ralf Klabunde

Shudong Ruan

Junjie Tao

John Jindra

Zhuo Li

Devices, systems and methods for digital video coding, which includes Prediction from Multiple Cross-components (PMC) methods, are described. An exemplary method for video processing includes making a first determination that a cross-component prediction (CCP) mode is disabled for a conversion between a video block of a video and a bitstream representation of the video and making a second determination, based on the first determination, regarding whether a first syntax element indicating usage of an enhanced Two-Step Cross-component Prediction Mode (TSCPM) coding tool or an enhanced cross-component linear model (CCLM) coding tool is included in the bitstream representation. The method also includes performing a conversion based on the second determination.

Cross-component prediction using multiple components

A method for processing video data is disclosed. The method includes determining a width (w) and a height (h) of a coding group based on a width (W) and a height (H) of a block that is non-dyadic and contains residual, processing the residual of the block in unit of the coding group, and performing a conversion between a visual media data and a bitstream according to a rule based on the processing.

Residual coding on non-dyadic blocks

Methods, systems and devices for sample string processing in intra coding are described. An example method of video processing includes determining, for a conversion between a video comprising a current block and a bitstream of the video, whether a first sample string of the current block forms a rectangle, and performing, based on the determining, the conversion, wherein the determining is based on a position and a length of the first sample string.

Sample string processing in intra coding

A mechanism for processing video data implemented by a video coding apparatus is disclosed. The mechanism determines usage of one or more of a separate tree coding and a partitioning beyond a minimum size threshold for a video unit. The mechanism also disables a cross-component coding tool for the video unit based on the determination. A conversion between a visual media data and a bitstream is performed in accordance with the coding tool being disabled.

Separate tree coding restrictions

A method for video processing includes: determining, that the video block is split into a plurality of sub-blocks based on a condition associated with the video block, refining motion information of each sub-block using a motion refinement process, the motion refinement process being a one-step or an iterative multi-step refinement process; and performing a video processing on the video block based on the refined motion information of each sub-block.

Sub-block based prediction

Methods, systems, and devices for implementing an adaptive color transform (ACT) during image/video encoding and decoding, including: determining, for a conversion between a video including a block and a bitstream of the video, that a size of the block is greater than a maximum allowed size for an ACT mode, and performing, based on the determining, the conversion. In response to the size of the block being greater than the maximum allowed size for the ACT mode, the block is partitioned into multiple sub-blocks. Each of the multiple sub-blocks share a same prediction mode, and the ACT mode is enabled at a sub-block level.

Use of offsets with adaptive colour transform coding tool

Methods and an apparatus for video processing are described. One example method includes determining, for a conversion between a video block of a video and a bitstream of the video, that the video block satisfies a condition. The video block is coded in the bitstream using an intra block copy mode. The method further includes performing the conversion based on the determining. Here, due to the video block satisfying the condition, a portion of an intra block copy buffer is reset during the conversion.

Intra block copy buffer and palette predictor update

Systems, methods, apparatus for video processing are described. A video processing method includes determining, for a conversion between a current block of a video and a bitstream of the video, whether or which a partitioning scheme is enabled for coding of the current block according to a rule, and performing the conversion based on the determining. The rule is based on one or more neighboring blocks of the current block.

Neighbor based partitioning constraints

Systems, methods, and an apparatus for video processing are described. A video processing method includes determining an application of a partitioning scheme to a video block positioned at a boundary of a video unit based on a rule, and performing a conversion between a visual media data and a bitstream based on the application of the partitioning scheme to the video block.

Boundary handling for coding tree split

Devices, systems and methods for digital video coding, which includes deriving RMVF-based motion vector information, are described. An exemplary method for video processing includes deriving at least one motion model for a current video block, based on motion information of at least one non-adjacent spatial neighboring block or at least one temporal neighboring block of the current video block; deriving motion information for the current video block or at least one sub-block of the current video block based on the at least one motion model; and performing a conversion for the current video block based on the derived motion information.

Regression-based motion vector field based sub-block motion vector derivation

A method of video processing includes determining, for a conversion between a current block of a video and a bitstream of the video, that the current block is split into multiple sub-blocks, wherein at least one of the multiple blocks is coded using a modified intra-block copy (IBC) coding technique that uses reference samples from one or more video regions from a current picture of the current block; and performing the conversion based on the determining.

Sub-block based intra block copy

Several techniques for video encoding and video decoding are described. One example method includes performing a conversion between a block of a video and a bitstream of the video according to a rule. The rule specifies that whether a syntax flag indicating whether transform skip residual coding is enabled at a video unit level is present in the bitstream is based on values of a first syntax element indicating usage of sign data hiding in the video unit and a second syntax element indicating usage of dependent quantization in the video unit.

Transform skip residual coding

Video coding and decoding techniques, including history-based motion vector prediction with default parameters, are described. One example video processing method includes resetting, for a conversion between a video unit of a video and a bitstream of the video, a history-based motion vector prediction (HMVP) table of size N by adding K HMVP motion candidates to the HMVP table, where the K HMVP motion candidates have default values, where N and K are positive integers, and where K≤N; and performing the conversion between the video unit and the bitstream using the HMVP table resulting from the resetting.

History-based motion vector prediction with default parameters

Embodiments of the present disclosure provide a solution for video processing. A method for video processing is proposed. The method comprises: applying, during a conversion between a target block of a video and a bitstream of the target block, a processing procedure to at least one motion candidate in a motion candidate list; reordering the motion candidate list by applying a first reordering process to the motion candidate list after the processing procedure; and performing the conversion based on the reordered motion candidate list.

Method, apparatus, and medium for video processing

A method of video processing includes determining, based on a video characteristic of a first video block, an enabling or disabling of a pruning process for a table updating process; updating one or multiple tables, based on the determination and motion information of the first video block, the one or multiple motion tables being History-based Motion Vector Prediction (HMVP) tables; and performing a conversion between a subsequent video block of the video and bitstream representation of the subsequent video block based on the updated tables.

Pruning method in different prediction mode

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Kai Zhang