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    Intra prediction-based image coding method using MPM list and apparatus therefor
    121.
    发明授权
    Intra prediction-based image coding method using MPM list and apparatus therefor 有权

    公开(公告)号：US11889063B2

    公开(公告)日：2024-01-30

    申请号：US18109656

    申请日：2023-02-14

    Applicant: LG ELECTRONICS INC.

    Inventor： Jin Heo ,  Seunghwan Kim ,  Ling Li

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

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

    Abstract: An image decoding method according to the present disclosure comprises deriving a first candidate intra prediction mode based on a first neighboring block of a current block; deriving a second candidate intra prediction mode based on a second neighboring block of the current block; constructing MPM (Most Probable Mode) list of 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; and generating a prediction sample for the current block based on the intra prediction mode, wherein the first neighboring block is a left neighboring block located at the lowermost side among neighboring blocks adjacent to a left boundary of the current block, and wherein the second neighboring block is an upper neighboring block located at the rightmost side among neighboring blocks adjacent to an upper boundary of the current block.

    Image coding method and device for carrying out MRL-based intra prediction
    123.
    发明授权
    Image coding method and device for carrying out MRL-based intra prediction 有权

    公开(公告)号：US11716461B2

    公开(公告)日：2023-08-01

    申请号：US17374274

    申请日：2021-07-13

    Applicant: LG Electronics Inc.

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

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

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

    Abstract: An image decoding method includes: configuring a MPM list including candidate intra prediction modes for a current block; deriving an intra prediction mode of the current block from the MPM list on the basis of MPM index information indicating an intra prediction mode, among the candidate intra prediction modes included in the MPM list, for the current block; 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 the step for configuring the MPM list comprises, on the basis of the case where the value of reference line index information, representing a reference line used for the intra prediction of the current block, is not zero, deriving a DC mode as one mode among the candidate intra prediction modes, and including same in the MPM list.

    METHOD FOR CODING INTRA-PREDICTION MODE, AND DEVICE FOR SAME
    125.
    发明申请
    METHOD FOR CODING INTRA-PREDICTION MODE, AND DEVICE FOR SAME 有权

    公开(公告)号：US20230055729A1

    公开(公告)日：2023-02-23

    申请号：US17979642

    申请日：2022-11-02

    Applicant: LG ELECTRONICS INC.

    Inventor： Ling Li ,  Seunghwan Kim

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

    Abstract: A picture decoding method which is performed by a decoding apparatus according to an example of the present disclosure includes constructing a Most Probable Modes (MPM) list including intra prediction mode candidates for a current block based on neighboring blocks of the current block, decoding remaining mode information indicating one of remaining intra prediction modes other than the intra prediction mode candidates included in the MPM list from a bitstream, determining an intra prediction mode of the current block based on the decoded remaining mode information, generating prediction samples for the current block based on the determined intra prediction mode, and generating reconstructed samples for the current block based on the prediction samples for the current block, wherein the remaining mode information is decoded based on a truncated binary code.

    Image prediction method and device for deriving chroma intra prediction mode
    126.
    发明授权
    Image prediction method and device for deriving chroma intra prediction mode 有权

    公开(公告)号：US11582482B2

    公开(公告)日：2023-02-14

    申请号：US17299630

    申请日：2019-11-27

    Applicant: LG ELECTRONICS INC.

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

    IPC: H04N19/593 ,  H04N19/105 ,  H04N19/11 ,  H04N19/186

    Abstract: An image decoding method according to the present document includes: a step for deriving a luma intra prediction mode; and a step for generating a chroma candidate mode list for a chroma block including a preset number of chroma intra candidates by using at least one among a DM, a planar mode, a DC mode, a vertical mode, a horizontal mode, and an up-right diagonal mode, which are derived from the luma intra prediction mode, wherein the DM is a prediction mode corresponding to a center (CR) position of the luma block, and the chroma intra candidates other than the DM can be derived through a duplicate check of the DM and a prediction mode corresponding to any one among the top left (TL), top right (TR), bottom left (BL), and bottom right (BR) of the luma block, the planar mode, the DC mode, the vertical mode, and the horizontal mode.

    Method for coding intra-prediction mode candidates included in a most probable modes (MPM) and remaining intra prediction modes, and device for same
    128.
    发明授权
    Method for coding intra-prediction mode candidates included in a most probable modes (MPM) and remaining intra prediction modes, and device for same 有权

    公开(公告)号：US11523106B2

    公开(公告)日：2022-12-06

    申请号：US17258629

    申请日：2019-06-24

    Applicant: LG ELECTRONICS INC.

    Inventor： Ling Li ,  Seunghwan Kim

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

    Abstract: A picture decoding method which is performed by a decoding apparatus according to an example of the present disclosure includes constructing a Most Probable Modes (MPM) list including intra prediction mode candidates for a current block based on neighboring blocks of the current block, decoding remaining mode information indicating one of remaining intra prediction modes other than the intra prediction mode candidates included in the MPM list from a bitstream, determining an intra prediction mode of the current block based on the decoded remaining mode information, generating prediction samples for the current block based on the determined intra prediction mode, and generating reconstructed samples for the current block based on the prediction samples for the current block, wherein the remaining mode information is decoded based on a truncated binary code.

    Intra prediction method and apparatus in image coding system
    129.
    发明授权
    Intra prediction method and apparatus in image coding system 有权

    公开(公告)号：US11509891B2

    公开(公告)日：2022-11-22

    申请号：US17279459

    申请日：2019-09-03

    Applicant: LG ELECTRONICS INC.

    Inventor： Ling Li ,  Seunghwan Kim ,  Jin Heo

    IPC: 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.

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