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    VIDEO OR IMAGE CODING METHOD AND DEVICE THEREFOR
    114.
    发明申请
    VIDEO OR IMAGE CODING METHOD AND DEVICE THEREFOR 有权

    公开(公告)号：US20220109888A1

    公开(公告)日：2022-04-07

    申请号：US17600001

    申请日：2020-03-19

    Applicant: LG ELECTRONICS INC.

    Inventor： Seethal PALURI ,  Jie ZHAO ,  Seunghwan KIM ,  Jaehyun LIM

    IPC: H04N19/70 ,  H04N19/159 ,  H04N19/176 ,  H04N19/82 ,  H04N19/117 ,  H04N19/169

    Abstract: According to the disclosure of the present document, an image decoding method performed by a decoding device comprises the steps of: acquiring, through a bitstream, image information including prediction mode information and residual information; deriving a prediction mode of a current block on the basis of the prediction mode information; deriving prediction samples on the basis of the prediction mode; deriving residual samples on the basis of the residual information; generating reconstruction samples on the basis of the prediction samples and the residual samples; deriving filter coefficients for an adaptive loop filter (ALF) procedure for the reconstruction samples; and generating modified reconstruction samples on the basis of the reconstruction samples and the filter coefficients, wherein the image information includes a first adaptation parameter set (APS) including an ALF data field, and the ALF data field includes ALF parameters used to derive the filter coefficients.

    IMAGE DECODING METHOD BASED ON CHROMA QUANTIZATION PARAMETER DATA, AND APPARATUS THEREFOR
    115.
    发明申请
    IMAGE DECODING METHOD BASED ON CHROMA QUANTIZATION PARAMETER DATA, AND APPARATUS THEREFOR 有权

    公开(公告)号：US20220103821A1

    公开(公告)日：2022-03-31

    申请号：US17546507

    申请日：2021-12-09

    Applicant: LG Electronics Inc.

    Inventor： Seethal PALURI ,  Seunghwan KIM ,  Jie ZHAO

    IPC: H04N19/124 ,  H04N19/132 ,  H04N19/186 ,  H04N19/70

    Abstract: An image decoding method performed by a decoding apparatus according to the present document comprises the steps of: obtaining a flag indicating whether quantization parameter data for combined chroma coding is present on the basis of a type of chroma; obtaining the quantization parameter data for the combined chroma coding on the basis of the flag; deriving a chroma quantization parameter table on the basis of the quantization parameter data; deriving a quantization parameter for the combined chroma coding on the basis of the chroma quantization parameter table; deriving residual samples on the basis of the quantization parameter; and generating a reconstructed picture on the basis of the residual samples.

    METHOD AND APPARATUS FOR PROCESSING VIDEO SIGNALS USING AFFINE PREDICTION
    116.
    发明申请
    METHOD AND APPARATUS FOR PROCESSING VIDEO SIGNALS USING AFFINE PREDICTION 有权

    公开(公告)号：US20210360227A1

    公开(公告)日：2021-11-18

    申请号：US17277926

    申请日：2019-09-23

    Applicant: LG ELECTRONICS INC.

    Inventor： Jane ZHAO ,  Seethal PALURI ,  Seunghwan KIM

    IPC: H04N19/105 ,  H04N19/137 ,  H04N19/46 ,  H04N19/176

    Abstract: Disclosed are a method for processing video signals and an apparatus therefor. Specifically, the method for processing video signals on the basis of inter prediction comprises the steps of: inducing a motion vector predictor using motion data of a neighboring block of the current block; parsing layer data indicating the current layer to which a motion vector difference used in inter prediction of the current block belongs, in a previously defined layer structure in which the combination of one or more horizontal and vertical components of motion vector differences are divided into multiple layers; parsing index data indicating a particular combination within the current layer; inducing a motion vector difference of the current block using the layer data and index data; and inducing the motion vector for the current block by adding the motion vector difference to the motion vector predictor.

    METHOD AND DEVICE FOR PROCESSING VIDEO SIGNAL BY USING INTER PREDICTION
    117.
    发明申请
    METHOD AND DEVICE FOR PROCESSING VIDEO SIGNAL BY USING INTER PREDICTION 有权

    公开(公告)号：US20210266526A1

    公开(公告)日：2021-08-26

    申请号：US17306212

    申请日：2021-05-03

    Applicant: LG ELECTRONICS INC.

    Inventor： Seethal PALURI ,  Seunghwan Kim

    IPC: H04N19/105 ,  H04N19/503 ,  H04N19/70

    Abstract: Embodiments of the disclosure provide methods and devices for decoding video signals using inter prediction. According to an embodiment of the disclosure, a method for processing a video signal comprises constructing a reference picture list of a current picture in the video signal and performing a prediction for a current picture by using the reference picture list, wherein constructing the reference picture list comprising, if a first entry of the reference picture list corresponds to a short-term reference picture (STRP), obtaining a picture order count (POC) difference between a picture related to the first entry and another picture, and if a second entry of the reference picture list corresponds to a long-term reference picture (LTRP), obtaining a POC modulo value of a picture related to the second entry. A reference picture list for identifying a picture may be generated in a simplified and effective manner. Thus, the compression performance may be increased, and the computation time may be decreased.

    IMAGE DECODING METHOD AND APPARATUS BASED ON INTER-PREDICTION IN IMAGE CODING SYSTEM
    118.
    发明申请
    IMAGE DECODING METHOD AND APPARATUS BASED ON INTER-PREDICTION IN IMAGE CODING SYSTEM 审中-公开

    公开(公告)号：US20200296414A1

    公开(公告)日：2020-09-17

    申请号：US16767925

    申请日：2018-11-28

    Applicant: LG ELECTRONICS INC.

    Inventor： Naeri PARK ,  Seethal PALURI ,  Junghak NAM ,  Jungdong SEO ,  Jaeho LEE ,  Hyeongmoon JANG

    IPC: H04N19/56 ,  H04N19/105 ,  H04N19/176 ,  H04N19/186

    Abstract: An image decoding method that is performed by a decoding apparatus according to the present disclosure comprises the steps of: obtaining information regarding inter-prediction of a current block via a bitstream; forming an MVP candidate list based on neighbouring blocks of the current block; deriving costs with respect to MVP candidates that are included in the MVP candidate list; deriving a revised MVP candidate list based on the costs with respect to the MVP candidates; deriving MVP of the current block based on the revised MVP candidate list; deriving a motion vector of the current block based on the MVP and MVD of the current block; and performing prediction on the current block based on a reference picture index and the motion vector of the current block, wherein the information regarding inter-prediction includes the reference picture index and the MVD.

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