公开(公告)号：US20210385439A1

公开(公告)日：2021-12-09

申请号：US17399904

申请日：2021-08-11

Applicant: Bytedance Inc.

Inventor： Weijia ZHU ,  Li ZHANG ,  Jizheng XU

IPC: H04N19/105 ,  H04N19/46 ,  H04N19/96 ,  H04N19/176

Abstract: Devices, systems and methods for coefficient coding in transform skip mode are described. An exemplary method for video processing includes determining, for encoding one or more video blocks in a video region of a visual media data into a bitstream representation of the visual media data, a maximum allowed dimension up to which a current video block of the one or more video blocks is allowed to be encoded using a transform skip mode such that a residual of a prediction error between the current video block and a reference video block is represented in the bitstream representation without applying a transform; and including a syntax element indicative of the maximum allowed dimension in the bitstream representation.

公开(公告)号：US20210329290A1

公开(公告)日：2021-10-21

申请号：US17360868

申请日：2021-06-28

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

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

IPC: H04N19/537 ,  H04N19/513 ,  H04N19/147 ,  H04N19/105 ,  H04N19/176

Abstract: Methods, systems and device for hash-based motion estimation in video coding are described. An exemplary method of video processing includes determining, for a conversion between a current block of a video and a bitstream representation of the video, motion information associated with the current block using a hash-based motion search, a size of the current block being M×N, M and N being positive integers and M being not equal to N, applying, based on the motion information and a video picture comprising the current block, a prediction for the current block, and performing, based on the prediction, the conversion.

公开(公告)号：US20250088625A1

公开(公告)日：2025-03-13

申请号：US18957496

申请日：2024-11-22

Applicant: Bytedance Inc.

Inventor： Weijia ZHU ,  Yuwen HE ,  Li ZHANG

IPC: H04N19/105 ,  H04N19/139 ,  H04N19/159 ,  H04N19/167 ,  H04N19/176 ,  H04N19/96

Abstract: Embodiments of the present disclosure provide a solution for video processing. A method for video processing is proposed. The method comprises: determining, for a conversion between a current block of a video and a bitstream of the video, that a first prediction mode is applied to the current block, deriving, in the first prediction mode, prediction samples of the current block based on reference values in a virtual buffer that are determined by a block vector for the current block; performing the conversion based on the prediction samples; determining a set of blocks from a plurality of blocks of the same video region based on coded information of the plurality of blocks, the plurality of blocks being coded before the current block; and updating the virtual buffer based on the set of blocks.

公开(公告)号：US20230059345A1

公开(公告)日：2023-02-23

申请号：US17572810

申请日：2022-01-11

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

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

IPC: H04N19/132 ,  H04N19/159 ,  H04N19/186 ,  H04N19/176 ,  H04N19/70

Abstract: Devices, systems and methods for palette mode coding are described. An exemplary method for video processing includes performing a conversion between a block of a video and a bitstream representation of the video. The bitstream representation is processed according to a format rule that specifies a first indication of usage of a palette mode and a second indication of usage of an intra block copy (IBC) mode are signaled dependent of each other.

公开(公告)号：US20230007271A1

公开(公告)日：2023-01-05

申请号：US17384137

申请日：2021-07-23

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

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

IPC: H04N19/159 ,  H04N19/176 ,  H04N19/46 ,  H04N19/132 ,  H04N19/186 ,  H04N19/107

Abstract: Devices, systems and methods for palette mode coding are described. An exemplary method for video processing includes determining, for a conversion between a block of a video region in a video and a bitstream representation of the video, a prediction mode based on one or more allowed prediction modes that include at least a palette mode of the block. An indication of usage of the palette mode is determined according to the prediction mode. The method also includes performing the conversion based on the one or more allowed prediction modes.

公开(公告)号：US20220377341A1

公开(公告)日：2022-11-24

申请号：US17330792

申请日：2021-05-26

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

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

IPC: H04N19/132 ,  H04N19/159 ,  H04N19/96 ,  H04N19/186 ,  H04N19/176

Abstract: Devices, systems and methods for palette mode coding are described. An exemplary method for video processing includes performing a conversion between a block of a video region of a video and a bitstream representation of the video. The bitstream representation is processed according to a first format rule that specifies whether a first indication of usage of a palette mode is signaled for the block and a second format rule that specifies a position of the first indication relative to a second indication of usage of a prediction mode for the block.

公开(公告)号：US20220321916A1

公开(公告)日：2022-10-06

申请号：US17842025

申请日：2022-06-16

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

Inventor： Weijia ZHU ,  Jizheng XU ,  Li ZHANG ,  Yue WANG

IPC: H04N19/60 ,  H04N19/105 ,  H04N19/186 ,  H04N19/176

Abstract: Methods, systems and devices for implementing adaptive color transform (ACT) and block based delta pulse code modulation (BDPCM) during image/video encoding or decoding are described. An example method of video processing includes determining, for a conversion between a current video unit of a video that is a chroma video unit and a bitstream representation of the video, whether a block-based delta pulse code modulation (BDPCM) mode is available based on a rule, and performing the conversion based on the determining, wherein the rule is based on whether an adaptive color transform (ACT) mode is used for coding the current video unit and/or whether the BDPCM mode is used for coding a luma video unit corresponding to the current video unit.

公开(公告)号：US20220264122A1

公开(公告)日：2022-08-18

申请号：US17720634

申请日：2022-04-14

Applicant: Bytedance Inc.

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

IPC: H04N19/186 ,  H04N19/176 ,  H04N19/124 ,  H04N19/12 ,  H04N19/117 ,  H04N19/30 ,  H04N19/157 ,  H04N19/60 ,  H04N19/132 ,  H04N19/167

Abstract: An example method of video processing includes performing a conversion between a video comprising one or more coding units and a bitstream representation of the video. The bitstream representation conforms to a format rule that specifies that chroma quantization parameters are included in the bitstream representation at a coding unit level or a transform unit level according to the format rule.

公开(公告)号：US20220201311A1

公开(公告)日：2022-06-23

申请号：US17693081

申请日：2022-03-11

Applicant: Bytedance Inc.

Inventor： Li ZHANG ,  Weijia ZHU ,  Jizheng XU

IPC: H04N19/132 ,  H04N19/105 ,  H04N19/186 ,  H04N19/176 ,  H04N19/169 ,  H04N19/46

Abstract: In one example aspect, a method of video processing includes performing a conversion between a current block in a video unit of a video and a coded representation 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. The predictor palette is re-initialized upon a condition being satisfied. The condition is satisfied in case the video unit is a first video unit in a video unit row and a syntax element is included in the coded representation indicating that a wavefront parallel processing is enabled for the video unit.

公开(公告)号：US20220191447A1

公开(公告)日：2022-06-16

申请号：US17556769

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: H04N9/67 ,  H04N19/12 ,  H04N19/30 ,  H04N19/132 ,  H04N19/105 ,  H04N19/11 ,  H04N19/124 ,  H04N19/17 ,  H04N19/119 ,  H04N19/186 ,  H04N19/159 ,  H04N19/61

Abstract: A method of video processing is provided. The method includes: determining, for a conversion between a current video unit of a video and a coded representation of the video, that applicability of a first coding tool and a second coding tool is mutually exclusive; and performing the conversion based on the determining, wherein the first coding tool corresponds to an adaptive color space transformation (ACT) tool; wherein 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.