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    IMAGE CODING METHOD AND DEVICE USING DEBLOCKING FILTERING
    1.
    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
    2.
    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 for processing image on basis of inter-prediction mode and device therefor
    5.
    发明授权
    Method for processing image on basis of inter-prediction mode and device therefor 有权

    公开(公告)号：US12096004B2

    公开(公告)日：2024-09-17

    申请号：US18134808

    申请日：2023-04-14

    Applicant: LG ELECTRONICS INC.

    Inventor： Hyeongmoon Jang

    IPC: H04N19/159 ,  H04N19/105 ,  H04N19/137 ,  H04N19/176 ,  H04N19/52

    CPC classification number: H04N19/159 ,  H04N19/105 ,  H04N19/137 ,  H04N19/176 ,  H04N19/52

    Abstract: Disclosed herein are a method for decoding a video signal and a device therefor. Specifically, a method for decoding an image based on an inter prediction mode may include: if a merge mode is applied to a current block, generating a merge candidate list by using a spatial neighboring block and a temporal neighboring block of the current block; obtaining a merge index indicating a candidate to be used for an inter prediction of the current block in the merge candidate list; deriving a motion vector of each of subblocks included in the current block based on a motion vector of the candidate used for the inter prediction of the current block; and generating a prediction sample of the current block by using the motion vector of each of subblocks.

    Inter prediction method and apparatus using CPR-based MMVD
    9.
    发明授权
    Inter prediction method and apparatus using CPR-based MMVD 有权

    公开(公告)号：US11949851B2

    公开(公告)日：2024-04-02

    申请号：US17419917

    申请日：2020-01-03

    Applicant: LG ELECTRONICS INC.

    Inventor： Hyeongmoon Jang

    IPC: H04N19/105 ,  H04N19/132 ,  H04N19/139 ,  H04N19/176 ,  H04N19/513

    CPC classification number: H04N19/105 ,  H04N19/132 ,  H04N19/139 ,  H04N19/176 ,  H04N19/513

    Abstract: An image decoding method performed by a decoding apparatus according to the present document comprises the steps of: determining that a merge with motion vector difference (MMVD) mode has been applied to a current block that is a current picture referencing (CPR) coding block referring to a current picture; deriving a base motion information candidate for the current block on the basis of candidate blocks neighboring the current block; generating prediction samples for the current block on the basis of the base motion information candidate; and generating reconstruction samples for the current block on the basis of the prediction samples, wherein the base motion information candidate is derived depending on whether the neighboring candidate blocks are CPR coding blocks.

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