公开(公告)号：US11490089B2

公开(公告)日：2022-11-01

申请号：US17522387

申请日：2021-11-09

Applicant: Bytedance Inc.

Inventor： Weijia Zhu ,  Li Zhang ,  Jizheng Xu

IPC: H04N11/02 ,  H04N19/132 ,  H04N19/105 ,  H04N19/176 ,  H04N19/70

Abstract: Devices, systems and methods for transform design for large blocks in video coding are described. An exemplary method for video processing includes determining that a size of a residual block of a video is larger than a maximum block size allowed for a transform skip mode, in which, during a decoding operation, residual coefficients are decoded without performing an inverse transform operation; splitting, based on the size of a residual block, the residual block into multiple regions, wherein each region represents a portion of the residual block of a difference between a portion of a current video block and a prediction block corresponding to the portion of the current video block; and determining a reconstructed current video block from the residual block based on selectively performing the inverse transform operation according to an indicator that indicates the transform skip mode.

公开(公告)号：US11451780B2

公开(公告)日：2022-09-20

申请号：US17528312

申请日：2021-11-17

Applicant: Bytedance Inc.

Inventor： Weijia Zhu ,  Li Zhang ,  Jizheng Xu

IPC: H04N19/124 ,  H04N19/159 ,  H04N19/176 ,  H04N19/70

Abstract: A method of video processing is described. The method includes performing a conversion between a current video block of a video and a coded representation of the current video block according to a rule, wherein the rule specifies that, due to use of an identity transform coding tool for representing the current video block into the coded representation, a syntax field indicative of a quantization parameter used for decoding the current video block is included such that a value of the quantization parameter is modified according to a rule, wherein the identity transform coding tool allows coefficient values at a transform domain of the current block to be same as values of a residual block of the current video block.

公开(公告)号：US11438602B2

公开(公告)日：2022-09-06

申请号：US17502202

申请日：2021-10-15

Applicant: Bytedance Inc.

Inventor： Weijia Zhu ,  Li Zhang ,  Jizheng Xu

IPC: H04N19/176 ,  H04N19/11 ,  H04N19/157 ,  H04N19/70 ,  H04N19/184 ,  H04N19/593 ,  H04N19/96

Abstract: Devices, systems and methods for coefficient coding in transform skip mode are described. An exemplary method for visual media processing includes making a decision, for encoding a current video block in a video region of a visual media data into a bitstream representation of the visual media data, regarding an application of an intra block copy (IBC) mode based on or inferred from at least a coding tree structure associated with the current video block; and selectively including, in the bitstream representation, a syntax element indicative of the application of the IBC mode based on or inferred from at least the coding tree structure.

公开(公告)号：US11431984B2

公开(公告)日：2022-08-30

申请号：US17411333

申请日：2021-08-25

Applicant: Bytedance Inc.

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

IPC: H04N19/00 ,  H04N19/132 ,  H04N19/159 ,  H04N19/176 ,  H04N19/186 ,  H04N19/70 ,  H04N19/11 ,  H04N19/124 ,  H04N19/182 ,  H04N19/593 ,  H04N19/105 ,  H04N19/59

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

公开(公告)号：US11388411B2

公开(公告)日：2022-07-12

申请号：US17411333

申请日：2021-08-25

Applicant: Bytedance Inc.

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

IPC: H04N19/00 ,  H04N19/132 ,  H04N19/159 ,  H04N19/176 ,  H04N19/186 ,  H04N19/70 ,  H04N19/11 ,  H04N19/124 ,  H04N19/182 ,  H04N19/593 ,  H04N19/105 ,  H04N19/59

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

公开(公告)号：US20220182669A1

公开(公告)日：2022-06-09

申请号：US17680979

申请日：2022-02-25

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

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

IPC: H04N19/593 ,  H04N19/176 ,  H04N19/124 ,  H04N19/11 ,  H04N19/157

Abstract: Extensions of intra coding modes in video coding are described. One example is a method for video processing, comprising: generating, for a conversion between a current video block of a video and a bitstream representation of a video, a set of extended intra prediction modes (IPMs) associated with the current video block by revising a set of existing IPMs to include at least one new coding method, wherein the new coding method is different from coding methods in the existing IPMs and is to be treated as IPM; and performing the conversion based on the set of extended IPMs.