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    INTRA PREDICTION-BASED VIDEO CODING METHOD AND DEVICE USING MPM LIST
    108.
    发明申请
    INTRA PREDICTION-BASED VIDEO CODING METHOD AND DEVICE USING MPM LIST 有权

    公开(公告)号：US20220279207A1

    公开(公告)日：2022-09-01

    申请号：US17749793

    申请日：2022-05-20

    Applicant: LG ELECTRONICS INC.

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

    IPC: H04N19/593 ,  H04N19/11 ,  H04N19/132 ,  H04N19/136 ,  H04N19/176

    Abstract: A video decoding method according to the present document comprises the steps of: configuring an MPM list by deriving candidate intra prediction modes on the basis of a first neighboring block located on the left side and a second neighboring block located on the upper side with respect to the current block; deriving an intra prediction mode for 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 a reconstructed picture for the current block on the basis of the prediction samples, wherein a first intra prediction mode of the first neighboring block and a second intra prediction mode of the second neighboring block are the same, wherein the candidate intra prediction modes including a DC mode are derived on the basis of a case where both the first intra prediction mode and the second intra prediction mode are the DC mode.

    Method for decoding image on basis of CCLM prediction in image coding system, and device therefor
    109.
    发明授权
    Method for decoding image on basis of CCLM prediction in image coding system, and device therefor 有权

    公开(公告)号：US11412236B2

    公开(公告)日：2022-08-09

    申请号：US17180474

    申请日：2021-02-19

    Applicant: LG ELECTRONICS INC.

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

    IPC: H04N19/186 ,  H04N19/105 ,  H04N19/176 ,  H04N19/136

    Abstract: A video decoding method performed by a decoding apparatus according to the present disclosure includes deriving one of a plurality of cross-component linear model (CCLM) prediction mode as a CCLM prediction mode of the current chroma block, deriving a sample number of neighboring chroma samples of the current chroma block based on the CCLM prediction mode of the current chroma block, a size of the current chroma block, and a specific value; deriving the neighboring chroma samples of the sample number, calculating CCLM parameters based on the neighboring chroma samples and the down sampled neighboring luma samples, deriving prediction samples for the current chroma block based on the CCLM parameters and the down sampled luma samples and generating reconstructed samples for the current chroma block based on the prediction samples, wherein the specific value is derived as 2.

    Intra prediction-based image coding method and device using MPM list
    110.
    发明授权
    Intra prediction-based image coding method and device using MPM list 有权

    公开(公告)号：US11368683B2

    公开(公告)日：2022-06-21

    申请号：US17369706

    申请日：2021-07-07

    Applicant: LG ELECTRONICS INC.

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

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

    Abstract: An image decoding method according to the present document derives a left mode, which is a candidate intra prediction mode for a left peripheral block of a current block, derives an upper mode, which is a candidate intra prediction mode for an upper peripheral block of the current block, constructs an MPM list on the basis of the left mode and the upper mode, derives an intra prediction mode of the current block on the basis of the MPM list, generates prediction samples of the current block on the basis of the intra prediction mode, generates a restoration picture of the current block on the basis of the prediction samples, and derives the left mode or the upper mode as one from among candidate intra prediction modes of the MPM list, on the basis of when the left mode and the upper mode are not the same and the left mode and the upper mode are respectively a planar mode and a DC mode.

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