公开(公告)号：US20230370644A1

公开(公告)日：2023-11-16

申请号：US18360608

申请日：2023-07-27

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

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

IPC: H04N19/70 ,  H04N19/159 ,  H04N19/174 ,  H04N19/169 ,  H04N19/176 ,  H04N19/46

CPC classification number: H04N19/70 ,  H04N19/159 ,  H04N19/174 ,  H04N19/188 ,  H04N19/176 ,  H04N19/46

Abstract: An example method of video processing includes performing a conversion between a video including a video picture including one or more video units and a bitstream representation of the video. The bitstream representation conforms to a format rule that specifies that a first syntax element is included in a header of the video picture indicating allowed prediction types of at least some of the one or more video units in the video picture.

公开(公告)号：US20220385948A1

公开(公告)日：2022-12-01

申请号：US17852025

申请日：2022-06-28

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

Inventor： Zhipin DENG ,  Li ZHANG ,  Hongbin LIU

IPC: H04N19/80 ,  H04N19/132 ,  H04N19/176 ,  H04N19/593

Abstract: A video processing method is provided to include: determining, based on a rule, whether to use a 4-tap interpolation filter for a conversion between a current video block of a current video unit of a video and a coded representation of the video, wherein the current video block is coded using intra mode in the coded representation; and performing the conversion based on the determining.

公开(公告)号：US20220264124A1

公开(公告)日：2022-08-18

申请号：US17731472

申请日：2022-04-28

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

Inventor： Zhipin DENG ,  Kai ZHANG ,  Li ZHANG ,  Hongbin LIU ,  Jizheng XU

IPC: H04N19/186 ,  H04N19/124 ,  H04N19/593 ,  H04N19/157 ,  H04N19/176 ,  H04N19/61 ,  H04N19/70 ,  H04N19/136 ,  H04N19/11

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 generating, for a conversion between a current video block of a video including multiple video blocks and a bitstream representation of the video, a most probable mode (MPM) list for a matrix based intra prediction (MIP) tool based on a rule, where, the MIP tool includes determining, during the conversion, a prediction block of the current video block 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, and where the rule specifies a mapping between a number of MIP modes and dimensions of the multiple video blocks; and performing the conversion based on the generating.

公开(公告)号：US20220248009A1

公开(公告)日：2022-08-04

申请号：US17700155

申请日：2022-03-21

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

Inventor： Jizheng XU ,  Zhipin DENG ,  Li ZHANG ,  Hongbin LIU ,  Kai ZHANG

IPC: H04N19/119 ,  H04N19/96 ,  H04N19/132 ,  H04N19/186 ,  H04N19/176

Abstract: A method of video processing is described. The method includes performing a conversion between a chroma block of a video region of a video picture of a video and a coded representation of the video according to a rule; wherein the rule specifies that, due to the chroma block having a size M×N, the chroma block is disallowed to be represented in the coded representation using an intra coding mode, wherein M and N are integers that indicate a width and a height of the chroma block respectively, and wherein the intra coding mode includes coding the chroma block based on a previously coded video region of the video picture.

公开(公告)号：US20220217328A1

公开(公告)日：2022-07-07

申请号：US17699014

申请日：2022-03-18

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

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

IPC: H04N19/105 ,  H04N19/132 ,  H04N19/30 ,  H04N19/159 ,  H04N19/176

Abstract: An example method of video processing includes determining, for a conversion between a current picture of a video and a bitstream of the video, a scaling ratio based on a first window in the current picture and a second window in a reference picture associated with the current picture; resampling the reference picture by using the determined scaling ratio; and performing the conversion based on the result of the resampling, wherein a dimension of the first window is W×H and a dimension of the second window is W′×H′, where W, H, W′ and H′ are integers, and wherein W, H, W′ and H′ satisfy a constraint.

公开(公告)号：US20220210437A1

公开(公告)日：2022-06-30

申请号：US17684630

申请日：2022-03-02

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

Inventor： Jizheng XU ,  Zhipin DENG ,  Li ZHANG ,  Hongbin LIU ,  Kai ZHANG

IPC: H04N19/157 ,  H04N19/174 ,  H04N19/186 ,  H04N19/176 ,  H04N9/64 ,  H04N19/169 ,  H04N19/119 ,  H04N19/46 ,  H04N19/503

Abstract: A method of video processing is described. The method includes determining, for a conversion between a video region of a video and a coded representation of the video, an intra coding characteristic of the video region based on a color format of the video according to a rule; and performing the conversion according to the intra coding characteristic.

公开(公告)号：US20220191484A1

公开(公告)日：2022-06-16

申请号：US17678827

申请日：2022-02-23

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

Inventor： Zhipin DENG ,  Li ZHANG ,  Kai ZHANG ,  Hongbin LIU

IPC: H04N19/117 ,  H04N19/82 ,  H04N19/159 ,  H04N19/186 ,  H04N19/176 ,  H04N19/70

Abstract: A method of video processing is described. The method includes determining, for subblocks of a current video block of a video, subblock boundaries to which a deblocking filter is to be applied according to a rule; and performing a conversion between the video and a coded representation of the video using the deblocking filter, wherein the rule specifies that a deblocking filter length is determined without checking a relationship between i) a sum of a position of a subblock of the current video block and a predefined value and ii) a width or a height of the current video block.

公开(公告)号：US20220174322A1

公开(公告)日：2022-06-02

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 ,  H04N19/157 ,  H04N19/169 ,  H04N19/176

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：US20220007029A1

公开(公告)日：2022-01-06

申请号：US17479360

申请日：2021-09-20

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 ,  G06F17/16 ,  G06F7/78

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 followed by an upsampling operation, where the upsampling operation is performed, in both a vertical direction and a horizontal direction in a fixed order, on samples obtained from the matrix vector multiplication operation.

公开(公告)号：US20210385446A1

公开(公告)日：2021-12-09

申请号：US17399839

申请日：2021-08-11

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

Inventor： Hongbin LIU ,  Li ZHANG ,  Kai ZHANG ,  Hsiao Chiang CHUANG ,  Zhipin DENG

IPC: H04N19/117 ,  H04N19/70 ,  H04N19/176 ,  H04N19/132

Abstract: Devices, systems and methods for adaptive loop filtering are described. In an exemplary aspect, a method for video processing includes performing, for a current video block of a video, a filtering process that uses filter coefficients and comprises two or more operations with at least one intermediate result, applying a clipping operation to the at least one intermediate result, and performing, based on the at least one intermediate result, a conversion between the current video block and a bitstream representation of the video, wherein the at least one intermediate result is based on a weighted sum of the filter coefficients and differences between a current sample of the current video block and neighboring samples of the current sample.