公开(公告)号：US20210385459A1

公开(公告)日：2021-12-09

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

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：US20220264106A1

公开(公告)日：2022-08-18

申请号：US17732777

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 ,  H04N19/70

Abstract: A method of video processing includes performing a conversion between a portion of a chroma component of a video and a bitstream representation of the video according to a rule, wherein the rule specifies that whether a cross-component adaptive loop filtering (CC-ALF) tool is available for the conversion of the portion of the video is dependent on whether an availability or a use of an adaptive loop filtering (ALF) tool is indicated for a corresponding portion of a luma component.

公开(公告)号：US20220210433A1

公开(公告)日：2022-06-30

申请号：US17694008

申请日：2022-03-14

Applicant: Bytedance Inc.

Inventor： Weijia ZHU ,  Li ZHANG ,  Jizheng XU

IPC: H04N19/14 ,  H04N19/117 ,  H04N19/176 ,  H04N19/196 ,  H04N19/86

Abstract: An example method of video processing includes performing a conversion between a block of a chroma component of a video and a bitstream representation of the video. During the conversion, a deblocking filter process is applied to at least some samples along an edge of the block, and wherein chroma quantization parameter (QP) offsets are added to outputs from a chroma QP table to determine parameters for the deblocking filter process.

公开(公告)号：US20220201300A1

公开(公告)日：2022-06-23

申请号：US17692929

申请日：2022-03-11

Applicant: Bytedance Inc.

Inventor： Li ZHANG ,  Weijia ZHU ,  Jizheng XU

IPC: H04N19/119 ,  H04N19/169 ,  H04N19/176 ,  H04N19/186

Abstract: In one example aspect, a method of video processing includes performing a conversion between a current block in video unit of a video and a bitstream of the video using a palette mode in which a palette of representative sample values is used for coding the current block. During the conversion, a predictor palette is used for predicting the palette of representative sample values, and wherein a size of the predictor palette is adaptively adjusted according to a rule.

公开(公告)号：US20220159301A1

公开(公告)日：2022-05-19

申请号：US17556689

申请日：2021-12-20

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

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

IPC: H04N19/61 ,  H04N19/169 ,  H04N19/186 ,  H04N19/119 ,  H04N19/70 ,  H04N19/159 ,  H04N19/11 ,  H04N19/124 ,  H04N19/132 ,  H04N19/105

Abstract: A method of video processing is provided. The method includes determining, due to a dual tree partitioning structure being used for a conversion between a video unit and a coded representation of the video unit, that use of an adaptive color space transformation (ACT) tool is disabled for the video unit; and performing, based on the determining, the conversion by disabling the ACT tool for the video unit, wherein the use of the ACT tool comprises: converting, during encoding a representation of a visual signal from a first color domain to a second color domain, or converting during decoding, a representation of a visual signal from the second color domain to the first color domain.

公开(公告)号：US20220159241A1

公开(公告)日：2022-05-19

申请号：US17585704

申请日：2022-01-27

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

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

IPC: H04N19/105 ,  H04N19/132 ,  H04N19/159 ,  H04N19/186 ,  H04N19/176

Abstract: Devices, systems and methods for video processing are described. An example method for video processing includes determining, for a conversion between a current block of a video and a bitstream representation of the video, a number of intra-coded neighboring blocks of the current block for a combined inter and intra prediction mode according to a rule that specifies a manner of treating a block coded using a palette coding mode in counting the number of intra-coded neighboring blocks for the combined inter and intra prediction mode. The method also includes performing the conversion based on the determining.

公开(公告)号：US20220150475A1

公开(公告)日：2022-05-12

申请号：US17580314

申请日：2022-01-20

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

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

IPC: H04N19/105 ,  H04N19/132 ,  H04N19/159 ,  H04N19/186 ,  H04N19/176

Abstract: Devices, systems and methods for video processing are described. An exemplary method for video processing includes determining, for a conversion between a current block of a video and a bitstream representation of the video, that a neighboring block of the current block that is coded in a palette mode is processed as an intra-coded block having a default mode during a construction of a list of most probable modes (MPM) candidates of the current block in case the neighboring block is located above or left of the current block. The method also includes performing the conversion based on the determining.

公开(公告)号：US20220109845A1

公开(公告)日：2022-04-07

申请号：US17554696

申请日：2021-12-17

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

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

IPC: H04N19/13 ,  H04N19/176 ,  H04N19/70

Abstract: Restrictions on number of context coded bins are described. A method for video processing includes applying, for a conversion between a video and a bitstream representation of the video, control on maximum number of context coded bins per predetermined unit which is associated with the video; and performing the conversion based on the control.

公开(公告)号：US20220070455A1

公开(公告)日：2022-03-03

申请号：US17524477

申请日：2021-11-11

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

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

IPC: H04N19/117 ,  H04N19/82 ,  H04N19/132 ,  H04N19/169 ,  H04N19/159 ,  H04N19/176

Abstract: In an exemplary aspect, a method for visual media processing includes determining whether a pair of adjacent blocks of visual media data are both intra block copy (IBC) coded; and selectively applying, based on the determination, a deblocking filter (DB) process by identifying a boundary at a vertical edge and/or a horizontal edge of the pair of adjacent blocks, calculating a boundary strength of a filter, deciding whether to turn on or off the filter, and selecting a strength of the filter in case the filter is turned on, wherein the boundary strength of the filter is dependent on a motion vector difference between motion vectors associated with the pair of adjacent blocks.

公开(公告)号：US20220070454A1

公开(公告)日：2022-03-03

申请号：US17523131

申请日：2021-11-10

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

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

IPC: H04N19/117 ,  H04N19/82 ,  H04N19/132 ,  H04N19/159 ,  H04N19/176

Abstract: In an exemplary aspect, a method for visual media processing includes identifying a boundary at a vertical edge and/or a horizontal edge of two video blocks; calculating a boundary strength of a filter based on at least one of the two video blocks crossing a vertical edge or a horizontal edge is coded using a combined intra-inter prediction (CIIP) mode; deciding whether to turn on or off the filter; selecting a strength of the filter in case the filter is turned on; and performing, based on the selecting, a deblocking filter (DB) process to the video blocks.