公开(公告)号：US11323697B2

公开(公告)日：2022-05-03

申请号：US17484636

申请日：2021-09-24

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

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

IPC: H04N19/00 ,  H04N19/105 ,  H04N19/132 ,  H04N19/176 ,  H04N19/80 ,  H04N19/117

Abstract: A method of video processing is provided to include: maintaining, prior to a conversion between a current video block of a video region and a coded representation of the video, at least one history-based motion vector prediction (HMVP) table, wherein the HMVP table includes one or more entries corresponding to motion information of one or more previously processed blocks; and performing the conversion using the at least one HMVP table; and wherein the motion information of each entry is configured to include interpolation filter information for the one or more previously processed blocks, wherein the interpolation filter information indicates interpolation filters used for interpolating prediction blocks of the one or more previously processed blocks.

公开(公告)号：US11310508B2

公开(公告)日：2022-04-19

申请号：US17203604

申请日：2021-03-16

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

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

IPC: H04N19/137 ,  H04N19/105 ,  H04N19/132 ,  H04N19/46

Abstract: A method of video processing is provided to include: performing a conversion between one or more video blocks of a video and a coded representation of the video, wherein a first field in the coded representation indicates whether fractional sample precision is used for indicating motion distances in a merge with motion vector difference (MMVD) mode used during the conversion, and wherein the MMVD mode includes a motion vector expression that includes a starting point, a motion distance and a motion direction for the current video block.

公开(公告)号：US11303899B2

公开(公告)日：2022-04-12

申请号：US17342996

申请日：2021-06-09

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 ,  H04N19/12 ,  H04N19/60 ,  H04N19/117 ,  H04N19/70 ,  H04N19/82 ,  H04N19/186

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 selectively followed by an upsampling operation, where the performing the conversion includes deriving, according to a rule, boundary samples by applying a left bit shift operation or a right bit shift operation on a sum of at least one reference boundary sample, and where the rule determines whether to apply the left bit shift or the right bit shift operation.

公开(公告)号：US11290712B2

公开(公告)日：2022-03-29

申请号：US17484636

申请日：2021-09-24

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

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

IPC: H04N19/00 ,  H04N19/105 ,  H04N19/132 ,  H04N19/176 ,  H04N19/80 ,  H04N19/117

Abstract: A method of video processing is provided to include: maintaining, prior to a conversion between a current video block of a video region and a coded representation of the video, at least one history-based motion vector prediction (HMVP) table, wherein the HMVP table includes one or more entries corresponding to motion information of one or more previously processed blocks; and performing the conversion using the at least one HMVP table; and wherein the motion information of each entry is configured to include interpolation filter information for the one or more previously processed blocks, wherein the interpolation filter information indicates interpolation filters used for interpolating prediction blocks of the one or more previously processed blocks.

公开(公告)号：US11277624B2

公开(公告)日：2022-03-15

申请号：US17154639

申请日：2021-01-21

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

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

IPC: H04N19/117 ,  H04N19/107 ,  H04N19/186 ,  H04N19/159 ,  H04N19/105 ,  H04N19/176 ,  H04N19/577 ,  H04N19/96

Abstract: Techniques for implementing video processing techniques are described. In one example implementation, a method of video processing includes determining, for a conversion between a block of a video and a bitstream representation of the video, whether a bi-prediction coding technique is applicable to the block based on a size of the block having a width W and a height H, W and H being positive integers. The method also includes performing the conversion based on the determining.

公开(公告)号：US11240509B2

公开(公告)日：2022-02-01

申请号：US17322166

申请日：2021-05-17

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

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

IPC: H04N19/132 ,  H04N19/30 ,  H04N19/176 ,  H04N19/186 ,  H04N19/70

Abstract: A method for video processing is provided to include: performing a conversion between a current video block of a video that is a chroma block and a coded representation of the video, wherein, during the conversion, the current video block is constructed based on a first domain and a second domain, and wherein the conversion further includes applying a forward reshaping process and/or an inverse reshaping process to one or more chroma components of the current video block.

公开(公告)号：US20210352293A1

公开(公告)日：2021-11-11

申请号：US17372968

申请日：2021-07-12

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

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

IPC: H04N19/137 ,  H04N19/119 ,  H04N19/46 ,  H04N19/176

Abstract: Disclosed and systems, methods and devices for video processing. An exemplary method for video processing includes: determining for a current video block, an indication which indicates that an affine merge with motion vector difference (MMVD) mode is applied to the current video block; performing a conversion between the current video block and a bitstream representation of a current video block based on the indication, the indication being activated based on the usage of at least one merge list for the current video block.

公开(公告)号：US12301845B2

公开(公告)日：2025-05-13

申请号：US18083956

申请日：2022-12-19

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

Inventor： Zhipin Deng ,  Li Zhang ,  Kai Zhang ,  Hongbin Liu ,  Jizheng Xu

IPC: H04N19/30 ,  H04N19/105 ,  H04N19/132 ,  H04N19/146 ,  H04N19/176 ,  H04N19/186 ,  H04N19/196 ,  H04N19/70 ,  H04N19/96

Abstract: A method for visual media processing, including performing a conversion between a current chroma video block of visual media data and a bitstream representation of the current chroma video block. During the conversion, a chroma residual of the current chroma video block is scaled based on a scaling coefficient. The scaling coefficient is derived at least based on luma samples located in predefined positions.

公开(公告)号：US20250126244A1

公开(公告)日：2025-04-17

申请号：US18991120

申请日：2024-12-20

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

Inventor： Na ZHANG ,  Kai Zhang ,  Jizheng Xu ,  Mehdi Salehifar ,  Li Zhang

IPC: H04N19/105 ,  H04N19/119 ,  H04N19/176

Abstract: Embodiments of the present disclosure provide a solution for video processing. A method for video processing is proposed. The method comprises: obtaining, for a conversion between the current video block and a bitstream of the video, a target number for a set of intra block copy merge mode with block vector difference (IBC-MBVD) candidates, the target number being indicated in the bitstream and dependent on a target configuration of a coding process for coding the current video block; selecting, based on the target number, the set of IBC-MBVD candidates from a plurality of IBC-MBVD candidates associated with an intra block copy (IBC) base candidate for the current video block; and performing the conversion based on the set of IBC-MBVD candidates.

公开(公告)号：US12231698B2

公开(公告)日：2025-02-18

申请号：US18335317

申请日：2023-06-15

Applicant: Bytedance Inc.

Inventor： Ye-kui Wang ,  Jizheng Xu

IPC: H04N19/00 ,  H04N19/176 ,  H04N19/186 ,  H04N19/70 ,  H04N19/86

Abstract: Methods and apparatus for video processing are described. The video processing may include video encoding, video decoding, or video transcoding. One example video processing method includes performing a conversion between a video picture of a video and a bitstream of the video. A first syntax element in a first video unit level specifying a deblocking parameter offset for β divided by 2 applied to a chroma component for one or more slices in a first video unit and a second syntax element in the first video unit level specifying a deblocking parameter offset for tC divided by 2 applied to the chroma component for the one or more slices in the first video unit are determined according to a rule in response to the first syntax element and the second syntax element not included in the bitstream.