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    ENTROPY CODING FOR PALETTE ESCAPE SYMBOL
    71.
    发明申请
    ENTROPY CODING FOR PALETTE ESCAPE SYMBOL 有权

    公开(公告)号：US20230051883A1

    公开(公告)日：2023-02-16

    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

    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.

    Context Coding for Transform Skip Mode
    72.
    发明申请
    Context Coding for Transform Skip Mode 有权

    公开(公告)号：US20230012847A1

    公开(公告)日：2023-01-19

    申请号：US17866036

    申请日：2022-07-15

    Applicant: Bytedance Inc.

    Inventor： Weijia Zhu ,  Li Zhang ,  Jizheng Xu

    IPC: H04N19/105 ,  H04N19/176 ,  H04N19/46 ,  H04N19/96

    Abstract: Devices, systems and methods for coefficient coding in transform skip mode are described. An exemplary method for video processing includes determining, for encoding one or more video blocks in a video region of a visual media data into a bitstream representation of the visual media data, a maximum allowed dimension up to which a current video block of the one or more video blocks is allowed to be encoded using a transform skip mode such that a residual of a prediction error between the current video block and a reference video block is represented in the bitstream representation without applying a transform; and including a syntax element indicative of the maximum allowed dimension in the bitstream representation.

    CHROMA INTRA MODE DERIVATION IN SCREEN CONTENT CODING
    73.
    发明申请
    CHROMA INTRA MODE DERIVATION IN SCREEN CONTENT CODING 有权

    公开(公告)号：US20220400252A1

    公开(公告)日：2022-12-15

    申请号：US17888956

    申请日：2022-08-16

    Applicant: Bytedance Inc.

    Inventor： Weijia Zhu ,  Li Zhang ,  Jizheng Xu

    IPC: H04N19/105 ,  H04N19/132 ,  H04N19/186 ,  H04N19/176 ,  H04N19/70

    Abstract: A method includes deriving, for a current video block of a video that is a chroma block and coded in a chroma derived mode (DM), an intra prediction mode for the current video block according to a rule related to a coding mode of the current video block; and performing a conversion between the current video block and a coded presentation of the video, wherein the rule specifies to derive the intra prediction mode based on an intra prediction direction of a corresponding luma block used to derive the chroma DM mode and coded using a block differential pulse code modulation representation of a quantized residual block corresponding to the current video block.

    Quantized residual differential pulse code modulation representation of coded video
    74.
    发明授权
    Quantized residual differential pulse code modulation representation of coded video 有权

    公开(公告)号：US11438597B2

    公开(公告)日：2022-09-06

    申请号：US17411296

    申请日：2021-08-25

    Applicant: Bytedance Inc.

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

    IPC: H04N19/132 ,  H04N19/159 ,  H04N19/70 ,  H04N19/186 ,  H04N19/176 ,  H04N19/11 ,  H04N19/124 ,  H04N19/182 ,  H04N19/593 ,  H04N19/105 ,  H04N19/59

    Abstract: Video coding and decoding methods are described. An example method includes determining, based on an applicability rule, that a differential coding mode is applicable to a conversion between a chroma video block of a video and a bitstream representation of the chroma video block, and performing, based on the determining, the conversion between the chroma video block and the bitstream representation of the chroma video block using the differential coding mode, where the chroma video block is represented in the bitstream representation using a difference between a quantized residual of an intra prediction of the chroma video block and a prediction of the quantized residual in the differential coding mode, where the intra prediction is performed in a first direction and the prediction of the quantized residual is performed in a second direction, and where the difference is represented using a differential pulse coding modulation (DPCM) representation.

    INTRA CODED VIDEO USING QUANTIZED RESIDUAL DIFFERENTIAL PULSE CODE MODULATION CODING
    76.
    发明公开
    INTRA CODED VIDEO USING QUANTIZED RESIDUAL DIFFERENTIAL PULSE CODE MODULATION CODING 审中-公开

    公开(公告)号：US20240121381A1

    公开(公告)日：2024-04-11

    申请号：US18501497

    申请日：2023-11-03

    Applicant: Bytedance Inc.

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

    IPC: H04N19/105 ,  H04N19/159 ,  H04N19/176 ,  H04N19/70

    CPC classification number: H04N19/105 ,  H04N19/159 ,  H04N19/176 ,  H04N19/70

    Abstract: Video coding and decoding methods are described. An example method includes performing a conversion between a current video block of a video and a bitstream representation of the current video block by determining a first intra coding mode to be stored which is associated with the current video block using a differential coding mode, where the first intra coding mode associated with the current video block is determined according to a second prediction mode used by the differential coding mode, and where, in the differential coding mode, a difference between a quantized residual of an intra prediction of the current video block and a prediction of the quantized residual is represented in the bitstream representation for the current video block using a differential pulse coding modulation (DPCM) representation.

    Quantization parameter derivation for palette mode
    78.
    发明授权
    Quantization parameter derivation for palette mode 有权

    公开(公告)号：US11563946B2

    公开(公告)日：2023-01-24

    申请号：US17698968

    申请日：2022-03-18

    Applicant: Bytedance Inc.

    Inventor： Weijia Zhu ,  Jizheng Xu ,  Li Zhang

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

    Abstract: Methods, systems, and devices for quantization parameter derivation in palette mode coding and decoding are described. An example method for video processing includes determining, for a conversion between a current block of a video and a bitstream representation of the video, that the current block is coded using a palette mode and an escape symbol value is signaled in the bitstream representation, and performing, based on the determining, the conversion, wherein a clipped quantization parameter for the current block is used in the conversion, and wherein the clipped quantization parameter used for a chroma component of the video is derived based on a quantization parameter subsequent to a mapping operation of a quantization process or a dequantization process.

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