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    USE OF OFFSETS WITH ADAPTIVE COLOUR TRANSFORM CODING TOOL
    64.
    发明申请
    USE OF OFFSETS WITH ADAPTIVE COLOUR TRANSFORM CODING TOOL 有权

    公开(公告)号：US20220345730A1

    公开(公告)日：2022-10-27

    申请号：US17857924

    申请日：2022-07-05

    Applicant: Beijing Bytedance Network Technology Co., Ltd.

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

    IPC: H04N19/196 ,  H04N19/126 ,  H04N19/12 ,  H04N19/176

    Abstract: Methods, systems and devices for implementing an adaptive color transform (ACT) during image/video encoding and decoding, including: determining, for a conversion between a video comprising a block and a bitstream of the video, that a size of the block is greater than a maximum allowed size for an ACT mode, and performing, based on the determining, the conversion, wherein, in response to the size of the block being greater than the maximum allowed size for the ACT mode, the block is partitioned into multiple sub-blocks, and wherein each of the multiple sub-blocks share a same prediction mode, and the ACT mode is enabled at a sub-block level.

    Entropy coding for palette escape symbol
    66.
    发明授权
    Entropy coding for palette escape symbol 有权

    公开(公告)号：US11943481B2

    公开(公告)日：2024-03-26

    申请号：US17965325

    申请日：2022-10-13

    Applicant: Bytedance Inc.

    Inventor： Weijia Zhu ,  Jizheng Xu ,  Li Zhang ,  Hsiao Chiang Chuang

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

    CPC classification number: H04N19/70 ,  H04N19/132 ,  H04N19/176 ,  H04N19/186

    Abstract: Methods, systems, and devices for performing entropy coding for a palette escape symbol in palette mode coding and decoding are described. An example method for video processing includes performing a conversion between a video having one or more video regions including a current video block and a bitstream representation of the video, wherein the bitstream representation conforms to a format rule that the current video block is coded using a palette mode coding tool, wherein a binarization of an escape symbol for the current video block uses an exponential-Golomb (EG) code of order K, wherein K is a non-negative integer that is unequal to three, and wherein the palette mode coding tool represents the current video block using a palette of representative color values and wherein the escape symbol is used for a sample of the current video block coded without using the representative color values.

    Transform bypass coded residual blocks in digital video
    68.
    发明授权
    Transform bypass coded residual blocks in digital video 有权

    公开(公告)号：US11870996B2

    公开(公告)日：2024-01-09

    申请号：US17872571

    申请日：2022-07-25

    Applicant: Bytedance Inc.

    Inventor： Weijia Zhu ,  Li Zhang ,  Jizheng Xu

    IPC: H04N11/02 ,  H04N19/132 ,  H04N19/105 ,  H04N19/176 ,  H04N19/70

    CPC classification number: H04N19/132 ,  H04N19/105 ,  H04N19/176 ,  H04N19/70

    Abstract: A method for video processing includes determining that a size of a residual block of a video is larger than a maximum block size allowed for a transform skip mode, in which, during a decoding operation, residual coefficients are decoded without performing an inverse transform operation; splitting, based on the size of a residual block, the residual block into multiple regions, wherein each region represents a portion of the residual block of a difference between a portion of a current video block and a prediction block corresponding to the portion of the current video block; and determining a reconstructed current video block from the residual block based on selectively performing the inverse transform operation according to an indicator that indicates the transform skip mode.

    SIGNALING IN TRANSFORM SKIP MODE
    69.
    发明公开
    SIGNALING IN TRANSFORM SKIP MODE 审中-公开

    公开(公告)号：US20230300379A1

    公开(公告)日：2023-09-21

    申请号：US18324577

    申请日：2023-05-26

    Applicant: Bytedance Inc.

    Inventor： Weijia Zhu ,  Li Zhang ,  Jizheng Xu

    IPC: H04N19/70 ,  H04N19/132 ,  H04N19/159 ,  H04N19/96 ,  H04N19/176

    CPC classification number: H04N19/70 ,  H04N19/132 ,  H04N19/159 ,  H04N19/96 ,  H04N19/176

    Abstract: Devices, systems and methods for coefficient coding in transform skip mode are described. An exemplary method for visual media processing includes: for encoding a current video block in a video region of a visual media data into a bitstream representation of the visual media data, identifying usage of a coding mode and/or an intra prediction mode and/or a set of allowable intra prediction modes; and upon identifying the usage, making a decision of whether to include or exclude, in the bitstream representation, a syntax element indicative of selectively applying a transform skip mode to the current video block, wherein, in the transform skip mode, a residual of a prediction error between the current video block and a reference video block is represented in the bitstream representation of the visual media data without applying a transformation.

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