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    INTRA PREDICTION-BASED IMAGE CODING METHOD AND APPARATUS USING MPM LIST
    231.
    发明申请
    INTRA PREDICTION-BASED IMAGE CODING METHOD AND APPARATUS USING MPM LIST 有权

    公开(公告)号：US20210092356A1

    公开(公告)日：2021-03-25

    申请号：US16952259

    申请日：2020-11-19

    Applicant: LG ELECTRONICS INC.

    Inventor： Ling LI ,  Jin HEO ,  Seunghwan KIM

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

    Abstract: A video decoding method according to this document includes deriving a first candidate intra prediction mode based on a first neighboring block located on a left side of a current block, deriving a second candidate intra prediction mode based on a second neighboring block located on an upper side of the current block, constructing a most probable mode (MPM) list for the current block based on the first candidate intra prediction mode and the second candidate intra prediction mode, deriving an intra prediction mode for the current block based on the MPM list, generating predicted samples by performing prediction for the current block based on the intra prediction mode, and generating a reconstructed picture for the current block based on the predicted samples.

    IMAGE CODING METHOD ON BASIS OF SECONDARY TRANSFORM AND DEVICE THEREFOR
    232.
    发明申请
    IMAGE CODING METHOD ON BASIS OF SECONDARY TRANSFORM AND DEVICE THEREFOR 有权

    公开(公告)号：US20210084314A1

    公开(公告)日：2021-03-18

    申请号：US16954026

    申请日：2018-12-13

    Applicant: LG ELECTRONICS INC.

    Inventor： Mehdi SALEHIFAR ,  Seunghwan KIM ,  Jaehyun LIM ,  Moonmo KOO

    IPC: H04N19/18 ,  H04N19/184 ,  H04N19/176 ,  H04N19/46 ,  H04N19/91 ,  H04N19/60

    Abstract: An image information decoding method performed by means of a decoding device according to the present invention comprises the steps of: decoding a non-separable secondary transform (NSST) index from a bitstream if NSST is applied to a target block; decoding information relating to transform coefficients with respect to the target block from the bitstream on the basis of the decoded NSST index; and deriving the transform coefficients with respect to the target block on the basis of the decoded information relating to the transform coefficients, wherein the NSST index is decoded prior to the information relating to the transform coefficients with respect to the target block.

    METHOD AND DEVICE FOR DESIGNING LOW-COMPLEXITY CALCULATION DST7
    233.
    发明申请
    METHOD AND DEVICE FOR DESIGNING LOW-COMPLEXITY CALCULATION DST7 有权

    公开(公告)号：US20210029357A1

    公开(公告)日：2021-01-28

    申请号：US17043494

    申请日：2019-05-02

    Applicant: LG ELECTRONICS INC.

    Inventor： Moonmo KOO ,  Mehdi SALEHIFAR ,  Seunghwan KIM ,  Jaehyun LIM

    IPC: H04N19/122 ,  H04N19/176 ,  H04N19/625 ,  H04N19/14

    Abstract: Reconstructing a video signal based on low-complexity DST7 design including obtaining a transform index of a current block from the video signal and deriving a transform combination corresponding to the transform index. The transform index corresponds to any one of a plurality of transform combinations including a combination of DST7 and/or DCT8, and the transform combination includes horizontal and vertical transforms that correspond to at least one of the DST7 or the DCT8. The reconstruction also includes performing an inverse transform in a vertical direction by using the DST7, performing an inverse transform in a horizontal direction by using the DCT8, and reconstructing the video signal by using the current block on which the inverse transform is performed. The DST7 includes Discrete Fourier Transform (DFT) and has a different type of DFT structure based on a size of the current block.

    IMAGE CODING METHOD BASED ON MOTION VECTOR AND APPARATUS THEREFOR
    234.
    发明申请
    IMAGE CODING METHOD BASED ON MOTION VECTOR AND APPARATUS THEREFOR 有权

    公开(公告)号：US20210021834A1

    公开(公告)日：2021-01-21

    申请号：US17060792

    申请日：2020-10-01

    Applicant: LG Electronics Inc.

    Inventor： Seethal PALURI ,  Seunghwan KIM

    IPC: H04N19/139 ,  H04N19/159 ,  H04N19/176 ,  H04N19/91 ,  H04N19/172 ,  H04N19/52 ,  H04N19/184 ,  H04N19/46 ,  H04N19/167

    Abstract: A picture decoding method performed by a decoding apparatus according to the present disclosure includes obtaining motion prediction information from bitstream, generating an affine MVP candidate list including affine MVP candidates for a current block, deriving CPMVPs for respective CPs of the current block based on one of the affine MVP candidates included in the affine MVP candidate list, deriving the CPMVDs for the CPs of the current block based on information on CPMVDs for each of the CPs included in the obtained motion prediction information, deriving CPMVs for the CPs of the current block based on the CPMVPs and the CPMVDs, deriving prediction samples for the current block based on the CPMVs, and generating reconstructed samples for the current block based on the derived prediction samples.

    METHOD AND APPARATUS FOR PROCESSING IMAGE SIGNAL
    237.
    发明申请
    METHOD AND APPARATUS FOR PROCESSING IMAGE SIGNAL 审中-公开

    公开(公告)号：US20200314425A1

    公开(公告)日：2020-10-01

    申请号：US16901818

    申请日：2020-06-15

    Applicant: LG ELECTRONICS INC.

    Inventor： Moonmo KOO ,  Mehdl SALEHIFAR ,  Seunghwan KIM ,  Jaehyun LIM

    IPC: H04N19/122 ,  H04N19/176 ,  H04N19/167

    Abstract: The embodiments of the present disclosure provides a method and apparatus for video signal processing. A method for decoding an image signal according to an embodiment of the present disclosure may include determining an input length and an output length of a non-separable transform based on a height and a width of a current block; determining a non-separable transform matrix corresponding to the input length and the output length of a non-separable transform; and applying the non-separable transform matrix to coefficients by a number of the input length in the current block, wherein the height and the width of a current block is greater than or equal to 8, wherein, if each of the height and the width of a current block is equal to 8, the input length of the non-separable transform is determined as 8.

    IMAGE DECODING METHOD AND APPARATUS USING VIDEO INFORMATION INCLUDING INTRA PREDICTION INFORMATION IN IMAGE CODING SYSTEM
    239.
    发明申请
    IMAGE DECODING METHOD AND APPARATUS USING VIDEO INFORMATION INCLUDING INTRA PREDICTION INFORMATION IN IMAGE CODING SYSTEM 审中-公开

    公开(公告)号：US20200021806A1

    公开(公告)日：2020-01-16

    申请号：US16507558

    申请日：2019-07-10

    Applicant: LG ELECTRONICS INC.

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

    IPC: H04N19/11 ,  H04N19/105 ,  H04N19/176 ,  H04N19/159 ,  H04N19/46

    Abstract: Provided is a video decoding method performed by a decoding apparatus, which includes: obtaining intra prediction information of the current block through a bitstream; deriving MPM (Most Probable Mode) list including MPM candidates of the current block; when a value of a MPM flag is 0, deriving an intra prediction mode of the current block based on the remaining intra prediction mode information, in which the intra prediction mode is one of remaining intra prediction modes excluding the MPM candidates; deriving a prediction sample of the current block based on the intra prediction mode; and deriving a reconstructed picture based on the prediction sample, in which the intra prediction information includes the MPM flag, the intra prediction information includes the remaining intra prediction mode information when the value of the MPM flag is 0, the MPM flag is coded through a fixed length (FL) binarization process, a binarization parameter for the FL binarization process is 1, the remaining intra prediction mode information is coded through a truncated binary (TB) binarization process, and a binarization parameter for the TB binarization process is 60.

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