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    BDOF-based inter prediction method and device
    14.
    发明授权
    BDOF-based inter prediction method and device 有权

    公开(公告)号：US11876972B2

    公开(公告)日：2024-01-16

    申请号：US17943537

    申请日：2022-09-13

    Applicant: LG Electronics Inc.

    Inventor： Naeri Park ,  Junghak Nam ,  Hyeongmoon Jang

    IPC: H04N19/176 ,  H04N19/159 ,  H04N19/105 ,  H04N19/186 ,  H04N19/137 ,  H04N19/132 ,  H04N19/46

    CPC classification number: H04N19/137 ,  H04N19/105 ,  H04N19/132 ,  H04N19/159 ,  H04N19/176 ,  H04N19/186 ,  H04N19/46

    Abstract: An image decoding method includes: deriving an L0 motion vector and a L1 motion vector of the current block; deriving prediction samples of the current block based on the L0 motion vector and the L1 motion vector; and generating reconstructed samples of the current block based on the prediction samples. Deriving the prediction samples includes applying bi-directional optical flow (BDOF) to the current block based on whether the condition for applying BDOF to the current block is satisfied, and the application condition of the BDOF includes a condition whereby the values of L0 luma weighted prediction flag information and L1 luma weighted prediction flag information are both zero, where the a value of each of the L0 luma weighted prediction flag information and L1 luma weighted prediction flag information being 0 represents that a weight factor for each of a L0 and L1 prediction luma components does not exist, respectively.

    IMAGE CODING METHOD AND DEVICE USING DEBLOCKING FILTERING
    16.
    发明公开
    IMAGE CODING METHOD AND DEVICE USING DEBLOCKING FILTERING 审中-公开

    公开(公告)号：US20230353791A1

    公开(公告)日：2023-11-02

    申请号：US18219012

    申请日：2023-07-06

    Applicant: LG ELECTRONICS INC.

    Inventor： Hyeongmoon Jang ,  Junghak Nam

    IPC: H04N19/82 ,  H04N19/117 ,  H04N19/176 ,  H04N19/85

    CPC classification number: H04N19/82 ,  H04N19/117 ,  H04N19/176 ,  H04N19/85

    Abstract: A method by which a decoding device decodes an image, according to the present document, comprises the steps of: generating a restoration picture on the basis of prediction samples of a coding block; deriving a boundary strength (BS) for a boundary of the coding block in the restoration picture; performing deblocking filtering on the boundary of the coding block on the basis of the boundary strength; and deriving a modified restoration picture for the restoration picture on the basis of the deblocking filtering, wherein the boundary strength is derived on the basis of a prediction mode of a first block and a second block that are adjacent to the boundary of the coding block, and the prediction mode of the first block or the second block is derived on the basis of whether the prediction mode of the first block or the second block is a current picture referencing (CPR) mode to be coded in reference to a current picture.

    Inter prediction method and apparatus based on history-based motion vector
    19.
    发明授权
    Inter prediction method and apparatus based on history-based motion vector 有权

    公开(公告)号：US11632564B2

    公开(公告)日：2023-04-18

    申请号：US17065822

    申请日：2020-10-08

    Applicant: LG ELECTRONICS INC.

    Inventor： Naeri Park ,  Junghak Nam ,  Hyeongmoon Jang

    IPC: H04N19/513 ,  H04N19/44

    Abstract: An image decoding method according to the present disclosure includes deriving a history-based motion vector prediction (HMVP) buffer for a current block, deriving motion information of the current block based on an HMVP candidate included in the HMVP buffer, generating prediction samples for the current block based on the motion information, and generating reconstructed samples based on the prediction samples, and the HMVP buffer is initialized when processing a first-ordered CTU in a CTU row in which a current CTU is located, and the current block is included in the current CTU.

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