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    TRANSFORM FOR MATRIX-BASED INTRA-PREDICTION IN IMAGE CODING
    15.
    发明申请
    TRANSFORM FOR MATRIX-BASED INTRA-PREDICTION IN IMAGE CODING 有权

    公开(公告)号：US20230047743A1

    公开(公告)日：2023-02-16

    申请号：US17963446

    申请日：2022-10-11

    Applicant: LG Electronics Inc.

    Inventor： Junghak NAM ,  Jaehyun LIM ,  Moonmo KOO ,  Seunghwan KIM

    IPC: H04N19/593 ,  H04N19/119 ,  H04N19/159 ,  H04N19/176 ,  H04N19/18 ,  H04N19/61 ,  H04N19/70

    Abstract: An image coding method according to the present document comprises the steps of: deriving transform coefficients for a current block on the basis of residual-related information; and generating residual samples of the current block on the basis of the transform coefficients. The residual-related information comprises low frequency non-separable transform (LFNST) index information, showing information relating to non-separable transform for low-frequency transform coefficients of the current block, on the basis of a matrix-based intra-prediction (MIP) flag showing whether or not MIP is applied to the current block. The residual samples are generated from the transform coefficients on the basis of the LFNST index information.

    INTER PREDICTION-BASED IMAGE CODING METHOD AND DEVICE
    16.
    发明申请
    INTER PREDICTION-BASED IMAGE CODING METHOD AND DEVICE 有权

    公开(公告)号：US20220417502A1

    公开(公告)日：2022-12-29

    申请号：US17891679

    申请日：2022-08-19

    Applicant: LG ELECTRONICS INC.

    Inventor： Naeri PARK ,  Junghak NAM ,  Hyeongmoon JANG

    IPC: H04N19/105 ,  H04N19/137 ,  H04N19/159 ,  H04N19/176

    Abstract: An image decoding method according to the present document may comprise: a step for deriving an inter prediction mode from encoded information; a step for constructing reference pictures lists; a step for deriving motion information including reference picture indices for symmetric motion vector differences (SMVD) on the basis of reference pictures included in the reference picture lists; and a step for generating prediction samples on the basis of the motion information. The reference picture indices for SMVD may be derived on the basis of short-term reference pictures included in the reference picture lists.

    INTER-PREDICTION METHOD AND APPARATUS IN IMAGE CODING SYSTEM
    18.
    发明申请
    INTER-PREDICTION METHOD AND APPARATUS IN IMAGE CODING SYSTEM 有权

    公开(公告)号：US20220329825A1

    公开(公告)日：2022-10-13

    申请号：US17843531

    申请日：2022-06-17

    Applicant: LG Electronics Inc.

    Inventor： Naeri PARK ,  Junghak NAM ,  Jaehyun LIM ,  Seunghwan KIM ,  Jungdong SEO ,  Jaeho LEE ,  Hyeongmoon JANG

    IPC: H04N19/139 ,  H04N19/105 ,  H04N19/109 ,  H04N19/176 ,  H04N19/503

    Abstract: An image decoding method performed by a decoding apparatus includes the operations of: deriving a correspondence block corresponding to the current block of the current picture, the correspondence block being located in a co-located picture; deriving a movement vector of the correspondence block; scaling the movement vector of the correspondence block based on a first temporal distance and second temporal distance, the first temporal distance being the difference between the POC values of the co-located picture and POC values of the reference picture of the correspondence block, and the second temporal distance being the difference between the POC values of the co-located picture and POC values of the current picture containing the current block; deriving the movement vector updated based on the scaled movement vector and location of the current block; and deriving a movement vector of the current block based on the updated movement vector.

    DMVR-BASED INTER-PREDICTION METHOD AND DEVICE
    19.
    发明申请
    DMVR-BASED INTER-PREDICTION METHOD AND DEVICE 有权

    公开(公告)号：US20220224911A1

    公开(公告)日：2022-07-14

    申请号：US17410371

    申请日：2020-02-07

    Applicant: LG Electronics Inc.

    Inventor： Naeri PARK ,  Junghak NAM

    IPC: H04N19/139 ,  H04N19/176 ,  H04N19/513 ,  H04N19/159

    Abstract: An image decoding method comprises the steps of: determining whether or not an application condition of decoder-side motion vector refinement (DMVR) for applying motion vector refinement for a current block is satisfied; deriving a minimum sum of absolute differences (SAD) on the basis of L0 and L1 motion vectors of the current block if the application condition of the DMVR is satisfied; deriving refined L0 and L1 motion vectors of the current block based on the minimum SAD; deriving prediction samples of the current block based on the refined L0 and L1 motion vectors; and generating reconstructed samples of the current block based on the prediction samples. With respect to whether or not the application condition of the DMVR is satisfied, the application condition of the DMVR is determined to be satisfied if a prediction mode, in which inter-prediction and intra-prediction are combined, is not applied to the current block.

    METHOD FOR PARTITIONING BLOCK INCLUDING IMAGE AND DEVICE THEREFOR
    20.
    发明申请
    METHOD FOR PARTITIONING BLOCK INCLUDING IMAGE AND DEVICE THEREFOR 有权

    公开(公告)号：US20220141498A1

    公开(公告)日：2022-05-05

    申请号：US17577785

    申请日：2022-01-18

    Applicant: LG ELECTRONICS INC.

    Inventor： Junghak NAM ,  Seunghwan KIM ,  Jaehyun LIM ,  Hyeongmoon JANG

    IPC: H04N19/96 ,  H04N19/119 ,  H04N19/176 ,  H04N19/70

    Abstract: Disclosed are a method for decoding a video signal and an apparatus therefor. Specifically, a method for decoding an image may include: partitioning a current coding tree block into a plurality of coding blocks so that coding blocks partitioned from the current coding tree block are included in a current picture when the current coding tree block is out of a boundary of the current picture; parsing a first syntax element indicating whether a current coding block is partitioned into a plurality of subblocks when the current coding block satisfies a predetermined condition; and determining a split mode of the current coding block based on the syntax element.

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