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    IMAGE CODING METHOD AND DEVICE USING DEBLOCKING FILTERING
    2.
    发明申请
    IMAGE CODING METHOD AND DEVICE USING DEBLOCKING FILTERING 有权

    公开(公告)号：US20240406460A1

    公开(公告)日：2024-12-05

    申请号：US18806020

    申请日：2024-08-15

    Applicant: LG ELECTRONICS INC.

    Inventor： Hyeongmoon Jang ,  Junghak Nam

    IPC: 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 in image coding system
    3.
    发明授权
    Inter-prediction method and apparatus in image coding system 有权

    公开(公告)号：US12160583B2

    公开(公告)日：2024-12-03

    申请号：US18368336

    申请日：2023-09-14

    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: 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.

    Method and apparatus for CABAC-based entropy coding
    6.
    发明授权
    Method and apparatus for CABAC-based entropy coding 有权

    公开(公告)号：US12010314B2

    公开(公告)日：2024-06-11

    申请号：US18125358

    申请日：2023-03-23

    Applicant: LG ELECTRONICS INC.

    Inventor： Junghak Nam

    IPC: H04N19/13 ,  H04N19/176 ,  H04N19/46 ,  H04N19/70

    CPC classification number: H04N19/13 ,  H04N19/176 ,  H04N19/46 ,  H04N19/70

    Abstract: A picture decoding method performed by a decoding device according to an embodiment of the present disclosure comprises the steps of: deriving a context index for a split flag syntax element on the basis of split availability information of a current block; determining a context model on the basis of the derived context index; decoding a value of the split flag syntax element on the basis of a CABAC, using the determined context model; deriving a current coding unit from the current block on the basis of the value of the split flag syntax element; deriving a predicted block on the basis of inter prediction or intra prediction for the current coding unit; and generating a reconstructed block on the basis of the predicted block.

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