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    BLOCK DIMENSION SETTINGS OF TRANSFORM SKIP MODE
    153.
    发明申请
    BLOCK DIMENSION SETTINGS OF TRANSFORM SKIP MODE 有权

    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.

    PRESENCE OF ADAPTATION PARAMETER SET UNITS
    154.
    发明申请
    PRESENCE OF ADAPTATION PARAMETER SET UNITS 有权

    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.

    TRANSFORM SKIP BASED RESIDUAL CODING
    159.
    发明申请
    TRANSFORM SKIP BASED RESIDUAL CODING 有权

    公开(公告)号：US20230039617A1

    公开(公告)日：2023-02-09

    申请号：US17942618

    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: H04N19/12 ,  H04N19/176 ,  H04N19/70 ,  H04N19/157

    Abstract: Methods, systems and apparatus for video processing are described. One example video processing method includes performing a conversion between a video including a video block and a bitstream of the video according to a rule, wherein the rule specifies whether to include, in a slice header (SH), a first syntax element that indicates whether a transform skip based residual coding is disabled for a slice, and wherein the rule specifies that whether to include the first syntax element in the SH is selectively based on a second syntax element in a sequence parameter set (SPS) that indicates whether a TS mode is enabled for the video block.

    Context modeling of reduced secondary transforms in video
    160.
    发明授权
    Context modeling of reduced secondary transforms in video 有权

    公开(公告)号：US11575940B2

    公开(公告)日：2023-02-07

    申请号：US17400464

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

    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 performing of the conversion includes configuring, based on a characteristic of the current video block of a video, a context model for coding a bin or bypass coding the bin of a bin string corresponding to an index of a secondary transform tool, wherein the index indicates an applicability of the secondary transform tool and/or a kernel information of the secondary transform tool, 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 wherein the secondary transform tool includes applying, during decoding, an inverse secondary transform to an output of dequantization to the video block before applying an inverse primary transform.

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