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    Image decoding method using BDPCM and device therefor
    12.
    发明授权
    Image decoding method using BDPCM and device therefor 有权

    公开(公告)号：US11871009B2

    公开(公告)日：2024-01-09

    申请号：US18098382

    申请日：2023-01-18

    Applicant: LG ELECTRONICS INC.

    Inventor： Sunmi Yoo ,  Junghak Nam ,  Jungah Choi

    IPC: H04N19/176 ,  H04N19/132 ,  H04N19/159 ,  H04N19/593 ,  H04N19/70

    CPC classification number: H04N19/176 ,  H04N19/132 ,  H04N19/159 ,  H04N19/593 ,  H04N19/70

    Abstract: An image decoding method performed by a decoding apparatus according to the present document comprises the steps of: deriving prediction samples for a first sample and a second sample of the current block on the basis of BDPCM-related information about the current block and neighboring samples of the current block; deriving residual samples for the first sample and the second sample on the basis of a residual coefficient of the first sample and a modified residual coefficient of the second sample; and storing, as the intra prediction mode of the current block, the intra prediction mode in the prediction direction of the current block, which is derived on the basis of a BDPCM direction flag.

    Image decoding method using BDPCM and device therefor
    17.
    发明授权
    Image decoding method using BDPCM and device therefor 有权

    公开(公告)号：US11595668B2

    公开(公告)日：2023-02-28

    申请号：US17612525

    申请日：2020-05-22

    Applicant: LG ELECTRONICS INC.

    Inventor： Sunmi Yoo ,  Junghak Nam ,  Jungah Choi

    IPC: H04N19/176 ,  H04N19/132 ,  H04N19/593 ,  H04N19/70 ,  H04N19/159

    Abstract: An image decoding method performed by a decoding apparatus according to the present document comprises the steps of: deriving prediction samples for a first sample and a second sample of the current block on the basis of BDPCM-related information about the current block and neighboring samples of the current block; deriving residual samples for the first sample and the second sample on the basis of a residual coefficient of the first sample and a modified residual coefficient of the second sample; and storing, as the intra prediction mode of the current block, the intra prediction mode in the prediction direction of the current block, which is derived on the basis of a BDPCM direction flag.

    Video encoding/decoding method and device using BDPCM, and method for transmitting bitstream
    18.
    发明授权
    Video encoding/decoding method and device using BDPCM, and method for transmitting bitstream 有权

    公开(公告)号：US11483587B2

    公开(公告)日：2022-10-25

    申请号：US17502946

    申请日：2021-10-15

    Applicant: LG Electronics Inc.

    Inventor： Sunmi Yoo ,  Jin Heo ,  Jangwon Choi ,  Jungah Choi

    IPC: H04N19/11 ,  H04N19/176 ,  H04N19/593 ,  H04N19/136

    Abstract: An image encoding/decoding method and apparatus are provided. An image decoding method according to the present disclosure may include parsing, from a bitstream, first information specifying whether block difference pulse code modulation (BDPCM) applies to an intra-predicted current block, determining a prediction direction of BDPCM for the current block and generating a residual block of the current block based on the determined prediction direction of BDPCM, based on the first information specifying that BDPCM applies to the current block, generating a prediction block of the current block, by performing intra prediction based on an intra prediction mode of the current block, and reconstructing the current block based on the residual block and the prediction block.

    Method and device for processing video signal for intra prediction
    20.
    发明授权
    Method and device for processing video signal for intra prediction 有权

    公开(公告)号：US11431969B2

    公开(公告)日：2022-08-30

    申请号：US17406528

    申请日：2021-08-19

    Applicant: LG Electronics Inc.

    Inventor： Jin Heo ,  Sunmi Yoo ,  Ling Li ,  Jangwon Choi ,  Jungah Choi

    IPC: H04N19/11 ,  H04N19/105 ,  H04N19/119 ,  H04N19/176 ,  H04N19/46 ,  H04N19/593

    Abstract: Embodiments of the present specification provide a method and a device for processing a video signal for intra prediction. A method for decoding a video signal according an embodiment of the present disclosure includes: obtaining intra prediction information of a current block to which the intra prediction is applied, in which the intra prediction information includes a first flag indicating a predetermined first mode; determining an intra prediction mode of the current block based on the intra prediction information, wherein when the first flag corresponds to a first value, the first mode is determined as the intra prediction mode and when the first flag corresponds to a second value, one of a plurality of candidate modes is determined as the intra prediction mode; and generating a prediction sample of the current block based on the intra prediction mode and a reference sample in a current picture. A separate flag indicating whether to use a primarily used specific mode is used to reduce a data amount for transmission of the intra prediction mode and a processing time of information of the intra prediction.

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