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    Intra prediction method and apparatus in image coding system
    85.
    发明授权
    Intra prediction method and apparatus in image coding system 有权

    公开(公告)号：US11889068B2

    公开(公告)日：2024-01-30

    申请号：US17964368

    申请日：2022-10-12

    Applicant: LG ELECTRONICS INC.

    Inventor： Ling Li ,  Seunghwan Kim ,  Jin Heo

    IPC: H04N19/11 ,  H04N19/105 ,  H04N19/159 ,  H04N19/176 ,  H04N19/46

    CPC classification number: H04N19/11 ,  H04N19/105 ,  H04N19/159 ,  H04N19/176 ,  H04N19/46

    Abstract: An image decoding method performed by a decoding apparatus according to the present disclosure comprises the steps of: obtaining a reference sample line index of a current block and most probable mode (MPM)-related information; constructing an alternative MPM list on the basis of the reference sample line index; deriving an intra prediction mode of the current block on the basis of the alternative MPM list and the MPM-related information; and generating a predicted block of the current block on the basis of the intra prediction mode, wherein the alternative MPM list is constructed on the basis of an intra prediction mode of an upper adjacent block of the current block and an intra prediction mode of a left adjacent block of the current block.

    Intra prediction-based video coding method and device using MPM list
    88.
    发明授权
    Intra prediction-based video coding method and device using MPM list 有权

    公开(公告)号：US11770557B2

    公开(公告)日：2023-09-26

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

    CPC classification number: 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.

    INTRA PREDICTION-BASED IMAGE CODING METHOD AND APPARATUS USING MPM LIST
    90.
    发明公开
    INTRA PREDICTION-BASED IMAGE CODING METHOD AND APPARATUS USING MPM LIST 审中-公开

    公开(公告)号：US20230291891A1

    公开(公告)日：2023-09-14

    申请号：US18198095

    申请日：2023-05-16

    Applicant: LG ELECTRONICS INC.

    Inventor： Ling LI ,  Jin Heo ,  Seunghwan Kim

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

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

    Abstract: A video decoding method according to this document includes deriving a first candidate intra prediction mode based on a first neighboring block located on a left side of a current block, deriving a second candidate intra prediction mode based on a second neighboring block located on an upper side of the current block, constructing a most probable mode (MPM) list for the current block based on the first candidate intra prediction mode and the second candidate intra prediction mode, deriving an intra prediction mode for the current block based on the MPM list, generating predicted samples by performing prediction for the current block based on the intra prediction mode, and generating a reconstructed picture for the current block based on the predicted samples.

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