公开(公告)号：US20230291894A1

公开(公告)日：2023-09-14

申请号：US18321426

申请日：2023-05-22

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

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

IPC: H04N19/105 ,  H04N19/176 ,  H04N19/186 ,  H04N19/189

CPC classification number: H04N19/105 ,  H04N19/176 ,  H04N19/186 ,  H04N19/189

Abstract: A method of video processing includes determining, for a conversion between a video component of a video comprising a current video block and a bitstream representation of the video, that a first coding tool is used based on a rule for the current video block; and performing the conversion according to the determining, wherein the first coding tool includes transforming a representation of a visual signal between two color spaces, and where the rule specifies that a first quantization parameter (QP) offset for a luma channel of the current video block is equal to K1 and a second QP offset for a first chroma channel of the current video block is K1+O, where K1 and O are integers.

公开(公告)号：US20230060824A1

公开(公告)日：2023-03-02

申请号：US17580446

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: H04N19/159 ,  H04N19/139 ,  H04N19/105 ,  H04N19/186 ,  H04N19/176

Abstract: Devices, systems and methods for video processing are described. An example method for video processing includes performing a conversion between a video comprising luma blocks and corresponding chroma blocks and a bitstream representation of the video according to a rule that specifies that, for a case that a current luma block is coded using a palette coding mode and a corresponding current chroma block coded with a derived mode, the current luma block is treated as having a default intra prediction mode and the current chroma block is coded with the default intra prediction mode.

公开(公告)号：US20230048394A1

公开(公告)日：2023-02-16

申请号：US17942432

申请日：2022-09-12

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

Inventor： Zhipin DENG ,  Ye-Kui WANG ,  Li ZHANG ,  Kai ZHANG

IPC: H04N19/70 ,  H04N19/124 ,  H04N19/172 ,  H04N19/186 ,  H04N19/174 ,  H04N19/12 ,  H04N19/132 ,  H04N19/85 ,  H04N19/60

Abstract: Methods, systems, and apparatus for video processing are described. One example video processing method includes performing a conversion between a video comprising a luma block and a bitstream of the video according to a rule. The rule specifies that whether a slice header (SH) includes a first syntax element is based on a second syntax element. The first syntax element indicates whether use of a delta quantization parameter (QP) is enabled for one or more coding units (CUs) of a specific slice of the luma block.

公开(公告)号：US20230020655A1

公开(公告)日：2023-01-19

申请号：US17942921

申请日：2022-09-12

Applicant: Bytedance Inc.

Inventor： Jizheng XU ,  Ye-kui WANG ,  Li ZHANG ,  Kai ZHANG

IPC: H04L9/32 ,  H04N19/174 ,  H04N19/167 ,  H04L9/30 ,  H04N19/186

Abstract: A method of digital media processing includes performing a conversion between a media segment and a bitstream of the media segment. The conversion conforming to a format rule and an encryption rule. The format rule specifying that verification information, which includes an indication of an integrity of a portion of the media segment, is signaled in the bitstream.

公开(公告)号：US20220353494A1

公开(公告)日：2022-11-03

申请号：US17852143

申请日：2022-06-28

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

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

IPC: H04N19/105 ,  H04N19/176 ,  H04N19/423 ,  H04N19/593

Abstract: A method of visual media processing includes determining, for a conversion between a current video block of visual media data and a bitstream representation of the current video block, a buffer that stores reference samples for prediction in an intra block copy mode; for a sample spatially located at location of the current video block relative to an upper-left position of a coding tree unit including the current video block and having a block vector, computing a corresponding reference in the buffer at a reference location, wherein the reference location is determined using the block vector and the location; and upon determining that the reference location lies outside the buffer, re-computing the reference location based at least in part on a location of the current video block relative to the coding tree unit including the current video block.

公开(公告)号：US20220337867A1

公开(公告)日：2022-10-20

申请号：US17853076

申请日：2022-06-29

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

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

IPC: H04N19/52 ,  H04N19/176 ,  H04N19/159 ,  H04N19/139 ,  H04N19/132 ,  H04N19/119 ,  H04N19/105 ,  H04N19/46

Abstract: Motion vector difference for block with geometric partition is described. One example method of video processing includes determining, for a conversion between a current video block of a video and a bitstream of the current video, that the current video block is coded with a geometric partitioning mode; deriving at least one refined motion vector (MV) for the current video block by adding at least one motion vector difference (MVD) of multiple MVDs signaled or derived for the current video block to a MV derived from a merge candidate associated with the current video block; and performing the conversion based on the refined MV.

公开(公告)号：US20220329842A1

公开(公告)日：2022-10-13

申请号：US17838498

申请日：2022-06-13

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

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

IPC: H04N19/513 ,  H04N19/105 ,  H04N19/132 ,  H04N19/159 ,  H04N19/176

Abstract: Devices, systems and methods for sample refinement and filtering method for video coding are described. In an exemplary aspect, a method for video processing includes modifying for a conversion between a block of a video and a bitstream representation of the video, a refinement value for a prediction sample in the block by applying a clipping operation to refinement value. The refinement value is derived based on a gradient value of an optical flow coding process. An output of the clipping operation is within a range. The method also includes refining the prediction sample based on the refinement value and performing the conversion based on the refined prediction sample.

公开(公告)号：US20220312008A1

公开(公告)日：2022-09-29

申请号：US17837216

申请日：2022-06-10

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

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

IPC: H04N19/117 ,  H04N19/186 ,  H04N19/96

Abstract: A method for video processing is described. The method includes determining, for a conversion between a video unit of a video and a bitstream representation of the video, whether to enable a mirrored padding process for padding an unavailable luma sample during an application of a loop filtering tool to the video unit; and performing the conversion based on the determining.

公开(公告)号：US20220303571A1

公开(公告)日：2022-09-22

申请号：US17831074

申请日：2022-06-02

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

Inventor： Kai ZHANG ,  Li ZHANG ,  Hongbin LIU ,  Yue WANG

IPC: H04N19/517 ,  H04N19/176 ,  H04N19/70

Abstract: A method of visual media processing, includes: performing a conversion between a current video block of a visual media data and a bitstream representation of the visual media data according to a modification rule, wherein the current video block is coded using affine motion information; wherein the modification rule specifies to modify an affine motion information coded in the bitstream representation using motion vector differences and/or reference picture indices during decoding.

公开(公告)号：US20220303533A1

公开(公告)日：2022-09-22

申请号：US17824304

申请日：2022-05-25

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

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

IPC: H04N19/119 ,  H04N19/137 ,  H04N19/132 ,  H04N19/176 ,  H04N19/70

Abstract: A method of video processing is provided to comprise: performing a conversion between a current video block of a video and a bitstream representation of the video, wherein, during the conversion, a use of a geometric partitioning mode is allowed for the current video block, and wherein parameters of the geometric partitioning mode are computed using a set of angles including a first number of angles that is less than a first threshold value and/or a set of distances including a second number of distances that is less than a second threshold value.