公开(公告)号：US20220377333A1

公开(公告)日：2022-11-24

申请号：US17867284

申请日：2022-07-18

Applicant: BEIJING BYTEDANCE NETWORK TECHNOLOGY CO., LTD. ,  Bytedance Inc.

Inventor： Weijia Zhu ,  Jizheng Xu ,  Li Zhang ,  Kai Zhang ,  Ye-kui Wang ,  Yue Wang

IPC: H04N19/12 ,  H04N19/60 ,  H04N19/176 ,  H04N19/85 ,  H04N19/196 ,  H04N19/186

Abstract: A method for implementing an adaptive colour transform (ACT) mode during image/video encoding and decoding includes performing a conversion between a current video block of a video and a bitstream of the video, wherein the current video block is coded using the ACT mode, wherein the conversion comprises applying an inverse ACT transform on the current video block according to a rule, and wherein the rule specifies that a clipping operation, based on a bit depth of the current video block, is applied to an input of the inverse ACT transform.

公开(公告)号：US11496772B2

公开(公告)日：2022-11-08

申请号：US17667380

申请日：2022-02-08

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

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

IPC: H04N19/70 ,  H04N19/176 ,  H04N19/169 ,  H04N19/157

Abstract: A method of video processing includes performing a conversion between a video comprising a video picture that includes multiple sub-pictures and multiple video blocks, and a coded representation of the video according to a rule. The rule specifies that a boundary between any two sub-pictures is also a boundary between two video blocks.

公开(公告)号：US11490110B2

公开(公告)日：2022-11-01

申请号：US17405179

申请日：2021-08-18

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

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

IPC: H04N19/105 ,  H04N19/513 ,  H04N19/176 ,  H04N19/132

Abstract: A method for processing a video includes performing a conversion between a current block of visual media data and a corresponding coded representation of the visual media data, wherein the conversion of the current block includes determining whether a use of one or both of a bi-directional optical flow (BIO) technique or a decoder-side motion vector refinement (DMVR) technique to the current block is enabled or disabled, and wherein the determining the use of the BIO technique or the DMVR technique is based on a cost criterion associated with the current block.

公开(公告)号：US11438598B2

公开(公告)日：2022-09-06

申请号：US17201711

申请日：2021-03-15

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

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

IPC: H04N19/149 ,  H04N19/105 ,  H04N19/11 ,  H04N19/132 ,  H04N19/176 ,  H04N19/186 ,  H04N19/30 ,  H04N19/593 ,  H04N19/159 ,  H04N19/50 ,  H04N19/184 ,  H04N19/70

Abstract: A method for video processing is provided. The method includes determining, for a conversion between a current video block of a video that is a chroma block and a coded representation of the video, parameters of a cross-component linear model that are completely determinable by two chroma samples and corresponding two luma samples; and performing the conversion based on the determining.

公开(公告)号：US11438597B2

公开(公告)日：2022-09-06

申请号：US17411296

申请日：2021-08-25

Applicant: Bytedance Inc.

Inventor： Weijia Zhu ,  Li Zhang ,  Jizheng Xu ,  Hsiao Chiang Chuang

IPC: H04N19/132 ,  H04N19/159 ,  H04N19/70 ,  H04N19/186 ,  H04N19/176 ,  H04N19/11 ,  H04N19/124 ,  H04N19/182 ,  H04N19/593 ,  H04N19/105 ,  H04N19/59

Abstract: Video coding and decoding methods are described. An example method includes determining, based on an applicability rule, that a differential coding mode is applicable to a conversion between a chroma video block of a video and a bitstream representation of the chroma video block, and performing, based on the determining, the conversion between the chroma video block and the bitstream representation of the chroma video block using the differential coding mode, where the chroma video block is represented in the bitstream representation using a difference between a quantized residual of an intra prediction of the chroma video block and a prediction of the quantized residual in the differential coding mode, where the intra prediction is performed in a first direction and the prediction of the quantized residual is performed in a second direction, and where the difference is represented using a differential pulse coding modulation (DPCM) representation.

公开(公告)号：US11431964B2

公开(公告)日：2022-08-30

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 ,  H04N19/105 ,  H04N19/159 ,  H04N19/176 ,  H04N19/189 ,  H04N19/139 ,  H04N19/46

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：US11412212B2

公开(公告)日：2022-08-09

申请号：US17199985

申请日：2021-03-12

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

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

IPC: H04N19/105 ,  H04N19/176 ,  H04N19/503 ,  H04N19/109 ,  H04N19/513 ,  H04N19/137 ,  H04N19/139 ,  H04N19/159

Abstract: Techniques for video encoding and decoding are described. An example method of video processing is disclosed. The method includes classifying motion candidates in a candidate list into a plurality of categories of motion candidates, each category being assigned a corresponding pruning rule; performing pruning or skipping the pruning of the motion candidates in the candidate list based on the corresponding pruning rule, the pruning being applied to determine whether to insert motion candidates from the candidate list into a final candidate list for a current block; and performing a video processing on the current block based on the final candidate list.

公开(公告)号：US11363273B2

公开(公告)日：2022-06-14

申请号：US17343980

申请日：2021-06-10

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

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

IPC: H04N19/00 ,  H04N19/132 ,  H04N19/105 ,  H04N19/159 ,  H04N19/176 ,  H04N19/12 ,  H04N19/60 ,  H04N19/117 ,  H04N19/70 ,  H04N19/82 ,  H04N19/186

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 performing a first determination that a luma video block of a video is coded using a matrix based intra prediction (MIP) mode in which a prediction block of the luma video block is determined by performing, on previously coded samples of the video, a boundary downsampling operation, followed by a matrix vector multiplication operation, and selectively followed by an upsampling operation, performing, based on the first determination, a second determination about a chroma intra mode to be used for a chroma video block associated with the luma video block, and performing, based on the second determination, a conversion between the chroma video block and a bitstream representation of the chroma video block.

公开(公告)号：US11350099B2

公开(公告)日：2022-05-31

申请号：US17342996

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: H04N19/132 ,  H04N19/105 ,  H04N19/159 ,  H04N19/176 ,  H04N19/12 ,  H04N19/60 ,  H04N19/117 ,  H04N19/70 ,  H04N19/82 ,  H04N19/186

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 performing a conversion between a current video block of a video and a bitstream representation of the current video block using a matrix based intra prediction (MIP) mode in which a prediction block of the current video block is determined by performing, on previously coded samples of the video, a boundary downsampling operation, followed by a matrix vector multiplication operation, and selectively followed by an upsampling operation, where the performing the conversion includes deriving, according to a rule, boundary samples by applying a left bit shift operation or a right bit shift operation on a sum of at least one reference boundary sample, and where the rule determines whether to apply the left bit shift or the right bit shift operation.

公开(公告)号：US11330257B2

公开(公告)日：2022-05-10

申请号：US17322579

申请日：2021-05-17

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

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

IPC: H04N19/107 ,  H04N19/159 ,  H04N19/176 ,  H04N19/513 ,  H04N19/58 ,  H04N19/96

Abstract: The present application relates to extended application of combined intra-inter prediction. A method for processing video includes: storing a combined inter-intra prediction (CIIP) flag and/or intra mode of the CIIP mode with motion information in a history-based motion vector prediction (HMVP) table; and performing, at least based on the HMVP table, a conversion between a current block in a video data and a bitstream representation of the current block.