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    METHOD AND APPARATUS FOR CODING IMAGE BY USING MMVD BASED ON CPR
    251.
    发明申请
    METHOD AND APPARATUS FOR CODING IMAGE BY USING MMVD BASED ON CPR 有权

    公开(公告)号：US20220070440A1

    公开(公告)日：2022-03-03

    申请号：US17416913

    申请日：2020-01-02

    Applicant: LG Electronics Inc.

    Inventor： Hyeongmoon JANG ,  Junghak NAM

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

    Abstract: A method for decoding an image by a decoding apparatus according to the present document comprises the steps of: obtaining merge with motion vector difference (MMVD) flag information of a current block from a bit stream; determining whether or not the current block is a current picture referencing (CPR) coding block; if the current block is a CPR coding block, deriving base motion information; deriving motion information of the current block on the basis of the base motion information; generating prediction samples of the current block on the basis of the motion information; and generating reconstruction samples of the current block on the basis of the prediction samples, wherein the MMVD flag information indicates whether or not motion information is derived when the MMVD is applied to the current block, and the CPR coding block is a block coded by using a current picture including the current block as a reference picture.

    SBTMVP-BASED INTER PREDICTION METHOD AND APPARATUS
    252.
    发明申请
    SBTMVP-BASED INTER PREDICTION METHOD AND APPARATUS 有权

    公开(公告)号：US20220060689A1

    公开(公告)日：2022-02-24

    申请号：US17414893

    申请日：2020-01-02

    Applicant: LG ELECTRONICS INC.

    Inventor： Hyeongmoon JANG ,  Junghak NAM

    IPC: H04N19/105 ,  H04N19/176 ,  H04N19/513 ,  H04N19/159 ,  H04N19/132

    Abstract: A method by which a decoding device performs image decoding, according to the present document, comprises the steps of: deriving a reference block on the basis of a motion shift; determining whether a subblock temporal motion vector predictor (sbTMVP) candidate is available, on the basis of whether the reference block is a current picture referencing (CPR) block; deriving motion information about a current block on the basis of the sbTMVP candidate when the sbTMVP candidate is available; generating prediction samples on the basis of the motion information; and generating a restored picture on the basis of the prediction samples, wherein the sbTMVP candidate is determined to be unavailable with respect to the reference block which is the CPR block.

    TRANSFORM IN INTRA PREDICTION-BASED IMAGE CODING
    253.
    发明申请
    TRANSFORM IN INTRA PREDICTION-BASED IMAGE CODING 有权

    公开(公告)号：US20220038744A1

    公开(公告)日：2022-02-03

    申请号：US17503788

    申请日：2021-10-18

    Applicant: LG ELECTRONICS INC.

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

    IPC: H04N19/60 ,  H04N19/176 ,  H04N19/159 ,  H04N19/18 ,  H04N19/122

    Abstract: An image decoding method according to the present document comprises the steps of: acquiring prediction-related information and residual-related information for a current block; deriving transform coefficients for the current block on the basis of the residual-related information; and generating residual samples of the current block on the basis of the transform coefficients, wherein the residual-related information includes low-frequency non-separable transform (LFNST) index information indicating information relating to non-separable transform for a low-frequency transform coefficient of the current block on the basis of a matrix-based intra prediction (MIP) flag.

    METHOD AND APPARATUS FOR DECODING IMAGE ON BASIS OF PREDICTION BASED ON MMVD IN IMAGE CODING SYSTEM
    255.
    发明申请
    METHOD AND APPARATUS FOR DECODING IMAGE ON BASIS OF PREDICTION BASED ON MMVD IN IMAGE CODING SYSTEM 有权

    公开(公告)号：US20210337209A1

    公开(公告)日：2021-10-28

    申请号：US17366722

    申请日：2021-07-02

    Applicant: LG Electronics Inc.

    Inventor： Hyeongmoon JANG ,  Junghak NAM

    IPC: H04N19/139 ,  H04N19/105 ,  H04N19/46 ,  H04N19/176

    Abstract: A method for decoding an image by a decoding apparatus according to the present document comprises the steps of: receiving a bit stream including prediction information of a current block; configuring a merge candidate list with respect to the current block; deriving motion information of the current block on the basis of a merge candidate indicated by a candidate flag of the current block in the merge candidate list; deriving an MVD of the current block on the basis of MVD information of the current block and whether or not integer sample precision or fractional sample precision is used in the motion information; deriving modified motion information of the current block on the basis of the motion information and the MVD; and performing prediction of the current block on the basis of the modified motion information, wherein the prediction information includes the candidate flag and the MVD information.

    IMAGE CODING METHOD AND DEVICE USING DEBLOCKING FILTERING
    256.
    发明申请
    IMAGE CODING METHOD AND DEVICE USING DEBLOCKING FILTERING 有权

    公开(公告)号：US20210321141A1

    公开(公告)日：2021-10-14

    申请号：US17356016

    申请日：2021-06-23

    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.

    METHOD AND APPARATUS FOR PROCESSING VIDEO SIGNAL BY USING INTRA-PREDICTION
    258.
    发明申请
    METHOD AND APPARATUS FOR PROCESSING VIDEO SIGNAL BY USING INTRA-PREDICTION 有权

    公开(公告)号：US20210281833A1

    公开(公告)日：2021-09-09

    申请号：US17257169

    申请日：2019-07-02

    Applicant: LG ELECTRONICS INC.

    Inventor： Jin HEO ,  Seunghwan KIM ,  Junghak NAM ,  Sunmi YOO ,  Ling LI ,  Jaehyun KIM ,  Jangwon CHOI ,  Jungah CHOI

    IPC: H04N19/105 ,  H04N19/132 ,  H04N19/176 ,  H04N19/423 ,  H04N19/44

    Abstract: Embodiments of the present disclosure provide a method and an apparatus for processing a video signal through intra prediction. A method for processing a video signal according to an embodiment of the present disclosure may include: checking that intra prediction is applied to a current block including a current sample to be predicted; determining a first reference sample value on a first reference location from at least one of samples positioned at an upper horizontal line and a left vertical line adjacent to the current block, based on an intra-prediction direction of the current block; determining a second reference sample value on a second reference location positioned in an opposite direction to the intra-prediction direction from a location of the current sample or the first reference location; determining a distance between the first reference location and the current sample as a first distance and determining a distance between the second reference location and the current sample as a second distance; and generating a prediction value of the current sample using the linear interpolation prediction based on a sample value of the first reference sample, the first distance, a sample value of the second reference sample, and the second distance.

    IMAGE DECODING METHOD AND APPARATUS ACCORDING TO BLOCK DIVISION STRUCTURE IN IMAGE CODING SYSTEM
    259.
    发明申请
    IMAGE DECODING METHOD AND APPARATUS ACCORDING TO BLOCK DIVISION STRUCTURE IN IMAGE CODING SYSTEM 有权

    公开(公告)号：US20210120242A1

    公开(公告)日：2021-04-22

    申请号：US16971883

    申请日：2018-02-22

    Applicant: LG Electronics Inc.

    Inventor： Junghak NAM ,  Jaehyun LIM

    IPC: H04N19/119 ,  H04N19/176 ,  H04N19/105 ,  H04N19/51 ,  H04N19/91

    Abstract: Provided is a video decoding method performed by a decoding apparatus, which includes: obtaining split information for a target block from a bitstream; splitting the target block into a first sub-block and a second sub-block based on a split boundary indicated by the split information; deriving a first motion information candidate list for the first sub-block and a second motion information candidate list for the second sub-block based on the split information for the target block; performing inter prediction of the first sub-block based on the first motion information candidate list; and performing inter prediction of the second sub-block based on the second motion information candidate list, in which the first sub-block and the second sub-block are non-rectangular blocks, and the first motion information candidate list for the first sub-block is different from the second motion information candidate list for the second sub-block.

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