公开(公告)号：US20250016335A1

公开(公告)日：2025-01-09

申请号：US18893479

申请日：2024-09-23

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

Inventor： Jizheng XU ,  Na ZHANG

IPC: H04N19/176 ,  H04N19/136 ,  H04N19/196

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 video unit of a video and a bitstream of the video, a block vector of the video unit based on a base block vector candidate and a parameter related to a block vector difference; and performing the conversion based on the block vector.

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：US20230046994A1

公开(公告)日：2023-02-16

申请号：US17849293

申请日：2022-06-24

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

Inventor： Kai ZHANG ,  Li ZHANG ,  Hongbin LIU ,  Zhipin DENG ,  Jizheng XU ,  Ye-kui WANG

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

Abstract: Devices, systems and methods related to digital video coding, and specifically, to signaling of slice types in video picture headers are described. One example method of video processing includes performing a conversion between a video including one or more video pictures including one or more slices and a bitstream of the video, wherein the bitstream conforms to a format rule, and wherein the format rule specifies that for a video picture of the one or more video pictures having all slices coded as I slices, P slice and B slice related syntax elements are omitted from a picture header for the video picture.

公开(公告)号：US20230019459A1

公开(公告)日：2023-01-19

申请号：US17461150

申请日：2021-08-30

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

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

IPC: H04N19/423 ,  H04N19/176 ,  H04N19/159 ,  H04N19/137 ,  H04N19/152 ,  H04N19/186 ,  H04N19/96 ,  H04N19/70 ,  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：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：US20220329816A1

公开(公告)日：2022-10-13

申请号：US17848535

申请日：2022-06-24

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

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

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

Abstract: A method of video processing includes performing a conversion between a current video block of a second color component of a video and a bitstream of the video using a cross-component prediction with multiple-parameter model (CCPMPM) in which samples of the current video block are predictively coded in the bitstream using a linear combination of samples of a first color component multiplied by linear coefficients and/or one or more offsets. The bitstream conforms to a format rule. The linear coefficients of the CCPMPM are determined using a first rule. The samples of the first color component are determined using a second rule.

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：US20220272324A1

公开(公告)日：2022-08-25

申请号：US17727542

申请日：2022-04-22

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 ,  H04N19/176 ,  H04N19/70

Abstract: A method of video processing includes determining, for a conversion between a current block of a video and a coded representation of the video, that a resolution of a current picture containing the current block and a reference picture used for the conversion are different, and performing the conversion based on the determining such that predicted values of a group of samples of the current block are generated using a horizontal or a vertical interpolation filter.

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.