公开(公告)号：US20210185346A1

公开(公告)日：2021-06-17

申请号：US17161198

申请日：2021-01-28

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

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

IPC: H04N19/52 ,  H04N19/17

Abstract: Devices, systems and methods for digital video coding, which include sub-block based inter prediction methods, are described. An exemplary method for video processing includes determining, for a conversion between a current block of video and a bitstream representation of the video, a maximum number of candidates in a sub-block based merge candidate list and/or whether to add sub-block based temporal motion vector prediction (SbTMVP) candidates to the sub-block based merge candidate list based on whether temporal motion vector prediction (TMVP) is enabled for use during the conversion or whether a current picture referencing (CPR) coding mode is used for the conversion, and performing, based on the determining, the conversion.

公开(公告)号：US20210160525A1

公开(公告)日：2021-05-27

申请号：US17167303

申请日：2021-02-04

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

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

IPC: H04N19/51 ,  H04N19/184 ,  H04N19/176 ,  H04N19/593

Abstract: The present disclosure relate to affine inheritance method in intra block copy mode. A method for video processing is provided, including: in a process of acquiring motion information of a current video block, during a conversion between the current video block and a bitstream representation of the current video block, wherein the motion information of the current video block is based on at least one affine model of at least one neighboring block of the current video block, determining whether a neighboring block of the current video block uses an Intra-Block Copy(IBC) mode in which at least one reference picture used by the neighboring video block is identical to a picture in which the neighboring block is located; disabling, for the current video block, to derive an affine candidate from the neighboring block based on determining that the neighbouring block uses the IBC mode; and performing the conversion based on the motion information of the current video block.

公开(公告)号：US20210136411A1

公开(公告)日：2021-05-06

申请号：US17150146

申请日：2021-01-15

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

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

IPC: H04N19/593 ,  H04N19/176 ,  H04N19/186 ,  H04N19/103 ,  H04N19/96

Abstract: The application provides a video processing method, comprising: receiving a bitstream representation of video data including a video block wherein the video block comprises samples in a first component and in a second component; deriving a first intra-prediction mode for the first component from second intra-prediction mode of sub-blocks for the second component in case that the video block of the second component is split into the sub-blocks; performing a conversion between the video block and the bitstream representation of the video block based on the first intra-prediction mode information.

公开(公告)号：US20210112284A1

公开(公告)日：2021-04-15

申请号：US17128965

申请日：2020-12-21

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

Inventor： Li ZHANG ,  Kai ZHANG ,  Hongbin LIU ,  Hsiao Chiang CHUANG ,  Yue WANG

IPC: H04N19/96 ,  H04N19/119 ,  H04N19/513 ,  H04N19/132 ,  H04N19/13 ,  H04N19/176

Abstract: Devices, systems and methods for picture border coding are described. In a representative aspect, a method for processing picture includes segmenting a picture into one or multiple picture segments, determining that a first block of a picture segment covers at least one region that is outside a border of the picture segment, wherein a size of the first block is M×N pixels, selecting a second block of size K×L pixels, where (K≤M and L

公开(公告)号：US20210092435A1

公开(公告)日：2021-03-25

申请号：US17109821

申请日：2020-12-02

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 ,  H04N19/577

Abstract: Devices, systems and methods for digital video coding, which include decoder side motion vector derivation (DMVD) tools, are described. An exemplary method for video processing includes making a decision, based on a determination that a current block of a video is coded using a multi-hypothesis prediction mode, regarding a selective enablement of a DMVD tool for the current block, wherein the DMVD tool derives a refinement of motion information signaled in a bitstream representation of the video; and performing, based on the decision, a conversion between the current block and the bitstream representation.

公开(公告)号：US20210092431A1

公开(公告)日：2021-03-25

申请号：US16951137

申请日：2020-11-18

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

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

IPC: H04N19/513 ,  H04N19/176 ,  H04N19/105 ,  H04N19/573

Abstract: Methods, systems, and devices related to sub-block based motion prediction in video coding are described. In one representative aspect, a video processing method includes partitioning a video block into a first set of sub-blocks according to a first pattern, partitioning the video block into a second set of sub-blocks according to a second pattern, wherein at least one sub-block in the second set has a different size than a sub-block in the first set, and determining a prediction block corresponding to a combination of a first intermediate prediction block that is predictively generated from the first set of sub-blocks and a second intermediate prediction block that is predictively generated from the second set of sub-blocks.

公开(公告)号：US20210092378A1

公开(公告)日：2021-03-25

申请号：US17110009

申请日：2020-12-02

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

Inventor： Li ZHANG ,  Kai ZHANG ,  Hongbin LIU ,  Hsiao Chiang CHUANG ,  Yue WANG

IPC: H04N19/119 ,  H04N19/189 ,  H04N19/176

Abstract: Methods, systems and devices for using flexible and efficient partitioning techniques, and in particular, sub-block shapes in extended quadtree partitioning, are described. An exemplary method for visual media decoding includes applying, to a current visual media block, a partitioning process that splits the current visual media block into exactly four sub-blocks including at least one sub-block that has a size different from half of a width of the current visual media block times half of a height of the current visual media block, where a size of the current visual media block is M×N, and the size of the at least one sub-block is based on a minimum value between M and N, or a maximum value between M and N; decoding, based on a bitstream representation, the four sub-blocks; and decoding, based on the four sub-blocks and the partitioning process, the current visual media block.

公开(公告)号：US20210092366A1

公开(公告)日：2021-03-25

申请号：US17117558

申请日：2020-12-10

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

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 limit; and performing the reconstruction of the current video unit using the list of affine motion vector prediction candidates.

公开(公告)号：US20210076043A1

公开(公告)日：2021-03-11

申请号：US17102274

申请日：2020-11-23

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

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

IPC: H04N19/136 ,  H04N19/70 ,  H04N19/60 ,  H04N19/176

Abstract: A video processing method includes checking, during a conversion from a coded representation of a current video block to the current video block, a position of a last non-zero coefficient of the current video block, wherein the position is relative to a top-left position of the current video block; and performing a determination, based on the position, whether or not to parse a syntax element which signals a transform information in the coded representation.

公开(公告)号：US20210029356A1

公开(公告)日：2021-01-28

申请号：US17071412

申请日：2020-10-15

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

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

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

Abstract: Devices, systems and methods for sub-block based prediction are described. In a representative aspect, a method for video processing includes partitioning a first component of a current video block into a first set of sub-blocks and partitioning a second component of the current video block into a second set of sub-blocks. A sub-block of the second component corresponds to one or more sub-blocks of the first component. The method also includes deriving, based on a color format of the current video block, motion vectors for a sub-block of the second component based on motion vectors for one or more corresponding sub-blocks of the first color component.