公开(公告)号：US12238346B2

公开(公告)日：2025-02-25

申请号：US17389157

申请日：2021-07-29

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

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

IPC: H04N19/96 ,  H04N19/119 ,  H04N19/12 ,  H04N19/122 ,  H04N19/13 ,  H04N19/132 ,  H04N19/136 ,  H04N19/157 ,  H04N19/172 ,  H04N19/176 ,  H04N19/184 ,  H04N19/186 ,  H04N19/46 ,  H04N19/70

Abstract: A method for processing a video includes determining characteristics regarding a current video block; determining an operational state regarding unsymmetrical quad-tree (UQT) splitting based on the determination of the characteristics, wherein the operational state indicates that whether the UQT splitting is enabled or disabled and/or indicates how to split the current video block into four partitions using the UQT splitting; and performing a conversion between the current video block and a bitstream representation of the current video block based on the operational state of UQT splitting.

公开(公告)号：US12219167B2

公开(公告)日：2025-02-04

申请号：US18158280

申请日：2023-01-23

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

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

IPC: H04N19/52 ,  H04N19/105 ,  H04N19/139 ,  H04N19/159 ,  H04N19/176 ,  H04N19/70

Abstract: Methods, devices and systems for intra-block coding based decoding or encoding of video while using block vector signaling and/or merge candidates are disclosed. An example method for video processing includes performing a conversion between a video region of a video and a bitstream representation of the video, wherein the bitstream representation selectively includes motion vector difference (MVD) related syntax elements for an intra block copy (IBC) advanced motion vector prediction (AMVP) mode based on a maximum number of a first type of IBC candidates used during the conversion of the video region, wherein, when an IBC mode is applied, samples of the video region are predicted from other samples in a video picture corresponding to the video region.

公开(公告)号：US12200244B2

公开(公告)日：2025-01-14

申请号：US17380310

申请日：2021-07-20

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

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

IPC: H04N19/52 ,  H04N19/105 ,  H04N19/176 ,  H04N19/423

Abstract: Multi-HMVP for affine is described. In an exemplary aspect, a method for video processing includes deriving, for a conversion between a current block of video and a bitstream representation of the current block, an affine model for the current block based on affine related information stored in at least one history motion vector prediction (HMVP) buffer of multiple HMVP buffers, the multiple HMVP buffers being used to store affine related information of blocks coded prior the current block in different categories; and performing the conversion by using the derived affine model.

公开(公告)号：US20250016329A1

公开(公告)日：2025-01-09

申请号：US18895652

申请日：2024-09-25

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

Inventor： Jizheng Xu ,  Li Zhang ,  Weijia Zhu ,  Kai Zhang ,  Hongbin Liu

IPC: H04N19/139 ,  H04N19/159 ,  H04N19/176 ,  H04N19/593 ,  H04N19/96

Abstract: Interaction between screen content coding tools and motion information is disclosed. A method of video processing includes modifying, for a conversion between a block of a video and a bitstream representation of the block, at least one of motion information associated with the block which is coded with intra block copy (IBC) mode; and performing the conversion based on the modified motion information.

公开(公告)号：US12192459B2

公开(公告)日：2025-01-07

申请号：US18320782

申请日：2023-05-19

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

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

IPC: H04N19/00 ,  H04N19/117 ,  H04N19/119 ,  H04N19/132 ,  H04N19/176 ,  H04N19/186 ,  H04N19/46 ,  H04N19/70 ,  H04N19/82

Abstract: An example method of video processing includes: determining, for a conversion between a chroma block of a current processing unit of a current subpicture of a current picture of a video and a bitstream of the video, that a cross component adaptive loop filtering operation is applied to the chroma block, wherein the current picture comprises one or more subpictures; and performing the conversion based on the determining, wherein in the cross component adaptive loop filtering operation, a chroma sample of the chroma block is filtered based on information of luma samples, and wherein one or more luma samples located outside the current processing unit are excluded from the filtering of the chroma sample.

公开(公告)号：US12184845B2

公开(公告)日：2024-12-31

申请号：US17950443

申请日：2022-09-22

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

Inventor： Zhipin Deng ,  Li Zhang ,  Ye-Kui Wang ,  Kai Zhang ,  Jizheng Xu

IPC: H04N19/105 ,  H04N19/117 ,  H04N19/132 ,  H04N19/139 ,  H04N19/159 ,  H04N19/174 ,  H04N19/176 ,  H04N19/186 ,  H04N19/463 ,  H04N19/52 ,  H04N19/70 ,  H04N19/80

Abstract: A method includes determining, for a conversion between a video block of a video and a bitstream of the video, a size of prediction block corresponding to the video block according to a rule. The method also includes performing the conversion based on the determining. The rule specifies that a first size of the prediction block is determined responsive to whether a prediction refinement using optical flow technique is used for coding the video block. The video block has a second size and is coded using an affine merge mode or an affine advanced motion vector prediction mode.

公开(公告)号：US12170789B2

公开(公告)日：2024-12-17

申请号：US17873917

申请日：2022-07-26

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

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

IPC: H04N19/513 ,  H04N19/577

Abstract: Motion compensation along different directions is disclosed. A method for video processing including: determining, for a conversion between a current video block of a video and a bitstream representation of the current video block, optical flow associated with the current video block in an optical flow-based motion refinement process or prediction process, wherein the optical flow is derived along directions that are different from a horizontal direction and/or a vertical direction; and performing the conversion based on the optical flow.

公开(公告)号：US12120302B2

公开(公告)日：2024-10-15

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: H04N19/00 ,  H04N19/105 ,  H04N19/132 ,  H04N19/169 ,  H04N19/176 ,  H04N19/52 ,  H04N19/56 ,  H04N19/70

CPC classification number: H04N19/132 ,  H04N19/105 ,  H04N19/176 ,  H04N19/1883 ,  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：US12114016B2

公开(公告)日：2024-10-08

申请号：US17888238

申请日：2022-08-15

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

Inventor： Kai Zhang ,  Li Zhang ,  Yang Wang ,  Ye-kui Wang ,  Zhipin Deng ,  Jizheng Xu ,  Hongbin Liu

IPC: H04N19/70 ,  H04N19/117 ,  H04N19/119 ,  H04N19/172 ,  H04N19/174 ,  H04N19/186 ,  H04N19/46 ,  H04N19/635 ,  H04N19/82

CPC classification number: H04N19/70 ,  H04N19/117 ,  H04N19/119 ,  H04N19/172 ,  H04N19/174 ,  H04N19/186 ,  H04N19/46 ,  H04N19/635 ,  H04N19/82

Abstract: A method includes performing a conversion between a video unit of a video and a bitstream of the video. The bitstream conforms to a format rule. The format rule specifies that a syntax element indicating whether an in-loop filtering operation is performed across slice boundaries is selectively included in the bitstream based on whether or how the video unit is partitioned into slices.

公开(公告)号：US12101494B2

公开(公告)日：2024-09-24

申请号：US17386403

申请日：2021-07-27

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

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

IPC: H04N19/433 ,  H04N19/105 ,  H04N19/132 ,  H04N19/137 ,  H04N19/139 ,  H04N19/146 ,  H04N19/159 ,  H04N19/169 ,  H04N19/174 ,  H04N19/176 ,  H04N19/186 ,  H04N19/423 ,  H04N19/517 ,  H04N19/52 ,  H04N19/593 ,  H04N19/80 ,  H04N19/82 ,  H04N19/96 ,  H04N19/117 ,  H04N19/86

CPC classification number: H04N19/433 ,  H04N19/105 ,  H04N19/132 ,  H04N19/137 ,  H04N19/139 ,  H04N19/146 ,  H04N19/159 ,  H04N19/174 ,  H04N19/176 ,  H04N19/186 ,  H04N19/1883 ,  H04N19/423 ,  H04N19/517 ,  H04N19/52 ,  H04N19/593 ,  H04N19/80 ,  H04N19/82 ,  H04N19/96 ,  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 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.