公开(公告)号：US11627313B2

公开(公告)日：2023-04-11

申请号：US17521012

申请日：2021-11-08

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

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

IPC: H04N19/109 ,  H04N19/139 ,  H04N19/46 ,  H04N19/52 ,  H04N19/105 ,  H04N19/157 ,  H04N19/176 ,  H04N19/513

Abstract: A method of visual media processing includes determining whether to use an affine adaptive motion vector resolution (AMVR) technique on visual media data relying on a control information related to the affine AMVR technique in a bitstream representation of the visual media data, wherein the control information is included or excluded from the bitstream representation based on a rule; and performing a conversion between the visual media data and the bitstream representation of the visual media data.

公开(公告)号：US11627308B2

公开(公告)日：2023-04-11

申请号：US17126707

申请日：2020-12-18

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

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

IPC: H04N19/105 ,  H04N19/159 ,  H04N19/176 ,  H04N19/30 ,  H04N19/517 ,  H04N19/137

Abstract: A video processing method includes deriving multiple temporal motion vector prediction (TMVP) candidates for a video block in a current picture based on multiple blocks associated with a second block in one or more pictures that are temporally co-located with the current picture, wherein the current picture is excluded from the one or more pictures, and the second block is temporally collocated with the video block, wherein the second block has a same size as the video block, and wherein a relative position of the second block to a top-left corner of a second picture of the one or more pictures is same as that of the video block to a top-left corner of the current picture; adding the multiple TMVP candidates to a motion candidate list associated with the video block; and performing a conversion between the video block and a bitstream.

公开(公告)号：US11622131B2

公开(公告)日：2023-04-04

申请号：US17400397

申请日：2021-08-12

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

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

IPC: H04N19/11 ,  H04N19/12 ,  H04N19/70 ,  H04N19/124 ,  H04N19/176 ,  H04N19/186 ,  H04N19/61 ,  H04N19/46

Abstract: A video processing method is provided to include: performing a conversion between a current video block of a video and a coded representation of the video, wherein the coded representation conforms to a format rule that specifies a last non-zero coefficient in a residual of the current video block and controls whether or how side information about a secondary transform tool is included in the coded representation, and wherein the secondary transform tool includes applying, during encoding, a forward secondary transform to an output of a forward primary transform applied to a residual of a video block prior to quantization, or applying, during decoding, an inverse secondary transform to an output of dequantization of the video block before applying an inverse primary transform.

公开(公告)号：US11616957B2

公开(公告)日：2023-03-28

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 ,  G06F7/78 ,  G06F17/16

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：US20230085716A1

公开(公告)日：2023-03-23

申请号：US17993241

申请日：2022-11-23

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

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

IPC: H04N19/105 ,  H04N19/132 ,  H04N19/159 ,  H04N19/176 ,  H04N19/169

Abstract: A method for video processing is described. The method may include making a decision, for a conversion between a current video block of a video picture of a video and a coded representation of the video, regarding a size of a reference region of the video picture from which reference samples are used for predicting the current video block, based on a size of a virtual pipeline data unit (VPDU), a size of a coding tree block (CTB), or a size of a coding tree unit (CTU); and performing the conversion based on the decision.

公开(公告)号：US11611753B2

公开(公告)日：2023-03-21

申请号：US17578703

申请日：2022-01-19

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

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

IPC: H04N19/186 ,  H04N19/124 ,  H04N19/132 ,  H04N19/159 ,  H04N19/176 ,  H04N19/70

Abstract: Devices, systems and methods for video processing are described. An exemplary method for video processing includes determining, for a block of a video, a quantization parameter associated with the block, coding the block of the video into a bitstream representation of the video as a palette coded block in part based on a modified value of the quantization parameter, and signaling coded information related to the quantization parameter in the bitstream representation.

公开(公告)号：US20230082583A1

公开(公告)日：2023-03-16

申请号：US17990267

申请日：2022-11-18

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

Inventor： Ye-kui Wang ,  Zhipin Deng ,  Kai Zhang ,  Li Zhang

IPC: H04N19/70 ,  H04N19/30 ,  H04N19/186 ,  H04N19/132 ,  H04N19/105 ,  H04N19/174 ,  H04N19/184 ,  H04N19/119

Abstract: Video processing, including video coding, video decoding and video transcoding, is described. One example method includes performing a conversion between a video comprising a video picture and a bitstream of a video according to a rule, where the rule specifies that syntax elements indicate a first width and a first height of a scaling window for the video picture, and where the rule specifies that a range of permissible values for the syntax elements include values greater than or equal to two times a second width of the video picture and two times a second height of the video picture.

公开(公告)号：US11606565B2

公开(公告)日：2023-03-14

申请号：US17684694

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 ,  H04N19/119 ,  H04N19/174 ,  H04N19/176 ,  H04N19/186 ,  H04N19/169 ,  H04N19/46 ,  H04N19/503 ,  H04N9/64 ,  H04N19/109 ,  H04N19/159

Abstract: A method of video processing is described. The method includes determining, for a conversion between a current video block of a video and a coded representation of the video, whether a certain partitioning scheme is allowed for the current video block according to a rule that depends on a coding mode type used for representing the current video block in the coded representation and a dimension of the current video block; and performing the conversion based on the determining.

公开(公告)号：US20230074729A1

公开(公告)日：2023-03-09

申请号：US17977433

申请日：2022-10-31

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

Inventor： Li Zhang ,  Kai Zhang ,  Zhipin Deng ,  Hongbin Liu ,  Na Zhang ,  Yue Wang

IPC: H04N19/124 ,  H04N19/12 ,  H04N19/127 ,  H04N19/167 ,  H04N19/176 ,  H04N19/70

Abstract: Devices, systems, and methods for lossless coding for visual media coding are described. An exemplary method for video processing includes determining, based on a current video block of a video satisfying a dimension constraint, that coding modes are enabled for representing the current video block in a bitstream representation, where the dimension constraint states that a same set of allowed dimensions for the current video block is disabled for the coding modes, and where, for an encoding operation, the coding modes represent the current video block in the bitstream representation without using a transform operation, or where, for a decoding operation, the coding modes are used to obtain the current video block without using an inverse transform operation; and performing a conversion between the current video block and the bitstream representation of the video based on one of the coding modes.

公开(公告)号：US20230066409A1

公开(公告)日：2023-03-02

申请号：US17967382

申请日：2022-10-17

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

Inventor： Zhipin Deng ,  Li Zhang ,  Ye-kui Wang ,  Kai Zhang

IPC: H04N19/70 ,  H04N19/169 ,  H04N19/172

Abstract: Systems, methods and apparatus for video processing are described. The video processing may include video encoding, video decoding, or video transcoding. One example method of video processing includes performing a conversion between a video comprising one or more pictures comprising one or more slices and a bitstream of the video. The bitstream conforms to a predefined order between a position of a first NAL (network abstraction layer) unit in a picture unit carrying an adaptation parameter set information and a second NAL unit that is a last video coding layer (VCL) NAL unit in the picture unit.