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    INTRA PREDICTION-BASED IMAGE CODING METHOD AND APPARATUS USING UNIFIED MPM LIST
    41.
    发明公开
    INTRA PREDICTION-BASED IMAGE CODING METHOD AND APPARATUS USING UNIFIED MPM LIST 审中-公开

    公开(公告)号：US20240244257A1

    公开(公告)日：2024-07-18

    申请号：US18391092

    申请日：2023-12-20

    Applicant: LG ELECTRONICS INC.

    Inventor： Jin HEO ,  Sunmi YOO ,  Ling LI ,  Jangwon CHOI ,  Jungah CHOI

    IPC: H04N19/593 ,  H04N19/105 ,  H04N19/11 ,  H04N19/132 ,  H04N19/176

    CPC classification number: H04N19/593 ,  H04N19/105 ,  H04N19/11 ,  H04N19/132 ,  H04N19/176

    Abstract: An image decoding method according to the present document comprises the steps of: acquiring, from a bitstream, reference line index information indicating a reference line to be used for intra prediction of a current block; constructing a most probable mode (MPM) list by deriving candidate intra prediction modes of the current block on the basis of the value of the reference line index information; deriving the intra prediction mode of the current block on the basis of the MPM list; generating prediction samples for the current block on the basis of the intra prediction mode; and generating restoration samples for the current block on the basis of the prediction samples, wherein, on the basis of the case in which the value of the reference line index information is not zero, one of the candidate intra prediction modes is a DC mode and the number of candidate intra prediction modes including the DC mode is 5.

    CCLM-BASED INTRA-PREDICTION METHOD AND APPARATUS THEREFOR
    44.
    发明公开
    CCLM-BASED INTRA-PREDICTION METHOD AND APPARATUS THEREFOR 审中-公开

    公开(公告)号：US20240015282A1

    公开(公告)日：2024-01-11

    申请号：US18371319

    申请日：2023-09-21

    Applicant: LG ELECTRONICS INC.

    Inventor： Jangwon CHOI ,  Jin HEO ,  Sunmi YOO ,  Ling LI

    IPC: H04N19/186 ,  H04N19/176 ,  H04N19/105 ,  H04N19/96

    CPC classification number: H04N19/186 ,  H04N19/176 ,  H04N19/105 ,  H04N19/96

    Abstract: A picture decoding method, performed by a decoding apparatus according to the present disclosure, comprises the steps of: when an intra-prediction mode of a chroma block is a cross-component linear model (CCLM) mode, deriving neighboring chroma reference samples with respect to the chroma block; deriving neighboring luma reference samples of a luma block corresponding to the chroma block and luma samples in the luma block; deriving down-sampled neighboring luma reference samples and downsampled luma samples by down sampling the neighboring luma reference samples and the luma samples, respectively; deriving a linear model parameter on the basis of the down-sampled neighboring luma reference samples and the neighboring chroma reference samples; generating prediction samples with respect to the chroma block on the basis of the linear model parameter and the down-sampled luma samples of the luma block; and reconstructing the chroma block on the basis of the prediction samples with respect to the chroma block.

    METHOD FOR CODING IMAGE/VIDEO ON BASIS OF INTRA PREDICTION AND DEVICE THEREFOR
    47.
    发明公开
    METHOD FOR CODING IMAGE/VIDEO ON BASIS OF INTRA PREDICTION AND DEVICE THEREFOR 审中-公开

    公开(公告)号：US20230199176A1

    公开(公告)日：2023-06-22

    申请号：US18112259

    申请日：2023-02-21

    Applicant: LG Electronics Inc.

    Inventor： Jin HEO ,  Sunmi YOO ,  Ling LI ,  Jangwon CHOI

    IPC: H04N19/105 ,  H04N19/159 ,  H04N19/176 ,  H04N19/46

    CPC classification number: H04N19/105 ,  H04N19/159 ,  H04N19/176 ,  H04N19/46

    Abstract: An image decoding method according to the present disclosure comprises the steps of: obtaining intra prediction type related information for a current block from a bit stream; deriving the intra prediction type of the current block based on the intra prediction type-related information; obtaining intra prediction mode-related information for the current block from the bitstream; configuring a most probable mode (MPM) list including candidate intra prediction modes for the current block based on neighboring blocks of the current block; deriving the intra prediction mode of the current block based on the MPM list and the intra prediction mode-related information; and generating a predicted block of the current block based on the intra prediction type and the intra prediction mode, wherein when the intra prediction type indicates the particular intra prediction type, the MPM index is parsed from the bit stream without parsing of an MPM flag.

    IMAGE DECODING METHOD USING BDPCM AND DEVICE THEREFOR
    49.
    发明公开
    IMAGE DECODING METHOD USING BDPCM AND DEVICE THEREFOR 审中-公开

    公开(公告)号：US20230156199A1

    公开(公告)日：2023-05-18

    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.

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