公开(公告)号：US11438613B2

公开(公告)日：2022-09-06

申请号：US17320033

申请日：2021-05-13

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

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

IPC: H04N19/433 ,  H04N19/105 ,  H04N19/176 ,  H04N19/186 ,  H04N19/52 ,  H04N19/593 ,  H04N19/80 ,  H04N19/96 ,  H04N19/137 ,  H04N19/517 ,  H04N19/139 ,  H04N19/82 ,  H04N19/132 ,  H04N19/159 ,  H04N19/169 ,  H04N19/423 ,  H04N19/146 ,  H04N19/117 ,  H04N19/86

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 representation 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：US20220279167A1

公开(公告)日：2022-09-01

申请号：US17735483

申请日：2022-05-03

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

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

IPC: H04N19/105 ,  H04N19/137 ,  H04N19/30 ,  H04N19/132 ,  H04N19/139 ,  H04N19/513

Abstract: Video coding and decoding in which the bitstream is generated using affine motion compensation mode are described. One example includes generating, for a reconstruction of a current video unit, a list of affine motion vector prediction candidates in which each candidate in the list is calculated without using a clipping operation, wherein the clipping operation limits a magnitude of the candidate motion vectors to a range; and performing the reconstruction of the current video unit using the list of affine motion vector prediction candidates.

公开(公告)号：US20220272389A1

公开(公告)日：2022-08-25

申请号：US17732692

申请日：2022-04-29

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

Inventor： Li ZHANG ,  Weijia ZHU ,  Kai ZHANG ,  Hongbin LIU

IPC: H04N19/82 ,  H04N19/17 ,  H04N9/77 ,  H04N19/117 ,  H04N19/132 ,  H04N19/136

Abstract: A method of video processing includes making a determination for a conversion between a video region of a video and a bitstream representation of the video to use a cross-component adaptive loop filtering (CC-ALF) tool for refining chroma samples values using luma sample values; and performing the conversion based on the determination, wherein the refining includes correcting the chroma sample values using a final refinement that is a further refinement of a first refinement value determined by selectively filtering the luma sample values.

公开(公告)号：US20220272348A1

公开(公告)日：2022-08-25

申请号：US17732743

申请日：2022-04-29

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

Inventor： Li ZHANG ,  Weijia ZHU ,  Kai ZHANG ,  Hongbin LIU

IPC: H04N19/132 ,  H04N19/117 ,  H04N19/80 ,  H04N19/186

Abstract: A method of video processing includes determining, for a conversion between a video region of a video and a bitstream representation of the video, to correct chroma samples of the video region using a cross-component adaptive loop filter (CC-ALF) process based on filtering of luma sample differences; and performing the conversion based on the determining.

公开(公告)号：US11425389B2

公开(公告)日：2022-08-23

申请号：US17342951

申请日：2021-06-09

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

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

IPC: H04N19/159 ,  H04N19/176 ,  H04N19/70 ,  H04N19/186 ,  H04N19/132 ,  H04N19/105 ,  H04N19/12 ,  H04N19/60 ,  H04N19/117 ,  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 and a coded representation of the current video block, a most probable mode (MPM) list based on a rule, where the rule is based on whether a neighboring video block of the current video block is coded with a matrix based intra prediction (MIP) mode, and performing the conversion between the current video block and the coded representation of the current video block using the MPM list, where the conversion applies a non-MIP mode to the current video block, and where the non-MIP mode is different from the MIP mode.

公开(公告)号：US20220264143A1

公开(公告)日：2022-08-18

申请号：US17652184

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: H04N19/52 ,  H04N19/56 ,  H04N19/70

Abstract: A method of video processing is described. The method of video processing includes: constructing, for a conversion between a current video block of a current picture of a video and a coded representation of the video, a history-based motion vector predictor (HMVP) table according to a rule, and performing the conversion using the HMVP table, wherein the current video block is coded in the coded representation using a block vector that represents a displacement between the current video block and a region in the current picture used for predicting the current video block; wherein the rule specifies that the constructing uses block vector information of previously processed video blocks in the HMVP table.

公开(公告)号：US20220264137A1

公开(公告)日：2022-08-18

申请号：US17718785

申请日：2022-04-12

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

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

IPC: H04N19/46 ,  H04N19/70 ,  H04N19/159 ,  H04N19/176

Abstract: An example method of video processing includes performing a conversion between a video picture of a video and a bitstream representation of the video. The bitstream representation conforms to a format rule. The format rule specifies that applicability of a Decoder-side Motion Vector Refinement coding tool and a Bi-Directional Optical Flow coding tool for the video picture are indicated separately in the bitstream representation.

公开(公告)号：US11418798B2

公开(公告)日：2022-08-16

申请号：US17201896

申请日：2021-03-15

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: Devices, systems and methods for applying intra-block copy (IBC) in video coding are described. In general, methods for integrating IBC with existing motion compensation algorithms for video encoding and decoding are described. In a representative aspect, a method for video encoding using IBC includes determining whether a current block of the current picture is to be encoded using a motion compensation algorithm, and encoding, based on the determining, the current block by selectively applying an intra-block copy to the current block. In a representative aspect, another method for video encoding using IBC includes determining whether a current block of the current picture is to be encoded using an intra-block copy, and encoding, based on the determining, the current block by selectively applying a motion compensation algorithm to the current block.

公开(公告)号：US20220256195A1

公开(公告)日：2022-08-11

申请号：US17711294

申请日：2022-04-01

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

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

IPC: H04N19/70 ,  H04N19/46 ,  H04N19/169 ,  H04N19/176

Abstract: An example method of video processing includes performing a conversion between a picture of a video that comprises one or more sub-pictures and a bitstream representation of the video. The bitstream representation conforms to a format rule that specifies that information about a sub-picture is included in the bitstream representation based on at least one of: (1) one or more corner positions of the sub-picture, or (2) a dimension of the sub-picture. The format rule further specifies that the information about the sub-picture is positioned after information about a coding tree block in the bitstream representation.

公开(公告)号：US20220256166A1

公开(公告)日：2022-08-11

申请号：US17717515

申请日：2022-04-11

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

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

IPC: H04N19/137 ,  H04N19/132 ,  H04N19/117 ,  H04N19/80 ,  H04N19/159 ,  H04N19/186 ,  H04N19/176 ,  H04N19/70

Abstract: A method of video processing is described. The method includes performing a conversion between a current video block of a video and a bitstream representation of the video, wherein, during the conversion, a prediction of the current video block is determined as a weighted sum of two or more predictions of the current video block, and a motion vector storing process for the current video block is determined according to a rule, wherein the current video block uses a partitioning prediction mode that is a first mode which is based on multiple first partitioning schemes or a second mode which is based on multiple second partitioning schemes, and wherein the rule specifies that a process used for determining which motion vector and how many motion vectors are stored is same for the first mode or the second mode.