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    CCLM-BASED INTRA-PREDICTION METHOD AND APPARATUS THEREFOR
    2.
    发明申请
    CCLM-BASED INTRA-PREDICTION METHOD AND APPARATUS THEREFOR 有权

    公开(公告)号：US20250030840A1

    公开(公告)日：2025-01-23

    申请号：US18905045

    申请日：2024-10-02

    Applicant: LG ELECTRONICS INC.

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

    IPC: H04N19/105 ,  H04N19/132 ,  H04N19/159 ,  H04N19/176 ,  H04N19/186

    Abstract: A picture decoding method, performed by a decoding apparatus according to the present dislosure, 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.

    MPM LIST-BASED INTRA PREDICTION METHOD AND DEVICE
    4.
    发明公开
    MPM LIST-BASED INTRA PREDICTION METHOD AND DEVICE 审中-公开

    公开(公告)号：US20240323355A1

    公开(公告)日：2024-09-26

    申请号：US18733676

    申请日：2024-06-04

    Applicant: LG ELECTRONICS INC.

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

    IPC: H04N19/105 ,  H04N19/132 ,  H04N19/159 ,  H04N19/176 ,  H04N19/46

    CPC classification number: H04N19/105 ,  H04N19/132 ,  H04N19/159 ,  H04N19/176 ,  H04N19/46

    Abstract: A video decoding method according to the present document is characterized by comprising: obtaining Most Probable Mode (MPM) index information and reference line index information from a bitstream; compiling an MPM list including candidate intra prediction modes for the intra prediction of a current block; deriving an intra prediction mode for the current block from among the candidate intra prediction modes included in the MPM list on the basis of the MPM index information; generating prediction samples for the current block on the basis of the intra prediction mode; and generating reconstructed samples for the current block on the basis of the prediction samples, wherein the step for compiling the MPM list involves deriving a DC mode as one of the candidate intra prediction modes, and including the DC mode in the MPM list, the DC mode being derived on the basis of the value of reference line index information indicating a reference line used for the intra prediction of the current block not being zero.

    IMAGE DECODING METHOD FOR RESIDUAL CODING, AND DEVICE THEREFOR
    9.
    发明申请
    IMAGE DECODING METHOD FOR RESIDUAL CODING, AND DEVICE THEREFOR 有权

    公开(公告)号：US20230042089A1

    公开(公告)日：2023-02-09

    申请号：US17957986

    申请日：2022-09-30

    Applicant: LG Electronics Inc.

    Inventor： Jungah CHOI ,  Sunmi YOO ,  Junghak NAM ,  Jin HEO ,  Jangwon CHOI ,  Seunghwan KIM

    IPC: H04N19/18 ,  H04N19/70 ,  H04N19/184

    Abstract: An image decoding method carried out by a decoding device, according to the present document, comprises the steps of: acquiring a sign data hiding enable flag; acquiring a transform skip residual coding (TSRC) enable flag on the basis of the sign data hiding enable flag; acquiring residual information for a current block, on the basis of the TSRC enable flag; deriving a residual sample of the current block, on the basis of the residual information; and generating a reconstructed picture on the basis of the residual sample, wherein the sign data hiding enable flag is a flag indicating whether sign data hiding is enabled, the TSRC enable flag is a flag indicating whether TSRC is enabled, and the TSRC enable flag is acquired on the basis of the sign data hiding enable flag having a value of zero.

    CCLM-BASED INTRA-PREDICTION METHOD AND DEVICE
    10.
    发明申请
    CCLM-BASED INTRA-PREDICTION METHOD AND DEVICE 有权

    公开(公告)号：US20220272351A1

    公开(公告)日：2022-08-25

    申请号：US17739468

    申请日：2022-05-09

    Applicant: LG Electronics Inc.

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

    IPC: H04N19/132 ,  H04N19/105 ,  H04N19/159 ,  H04N19/172 ,  H04N19/196

    Abstract: A method for decoding a picture based on a cross-component linear model (CCLM) mode includes deriving neighboring luma reference samples of a luma block, deriving down-sampled neighboring luma reference samples, deriving a linear model parameter based on the down-sampled neighboring luma reference samples and the neighboring chroma reference samples, where the neighboring luma reference samples includes top neighboring luma reference samples, and left neighboring luma reference samples, and where when the top boundary of the luma block overlaps with a boundary of a coding tree unit (CTU), the number of the top neighboring luma reference samples used for deriving the down-sampled neighboring luma reference samples among the neighboring luma reference samples is less than that of the left neighboring luma reference samples used for deriving the down-sampled neighboring luma reference samples.

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