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    Image encoding/decoding method and apparatus using IBC, and method for transmitting bitstream
    6.
    发明授权
    Image encoding/decoding method and apparatus using IBC, and method for transmitting bitstream 有权

    公开(公告)号：US11533476B2

    公开(公告)日：2022-12-20

    申请号：US17579288

    申请日：2022-01-19

    Applicant: LG ELECTRONICS INC.

    Inventor： Hyeong Moon Jang

    IPC: H04N19/105 ,  H04N19/159 ,  H04N19/174 ,  H04N19/176 ,  H04N19/46

    Abstract: An image encoding/decoding method and apparatus are provided. An image decoding method performed by an image decoding apparatus may include determining whether to parse first information specifying whether a skip mode applies to a current block, determining whether to parse second information specifying whether an IBC (Intra Block Copy) mode applies to the current block, determining whether the IBC mode applies to the current block based on the first information and the second information, and deriving a prediction block of the current block based on whether to apply the IBC mode. Whether to parse the first information may be determined based on at least one of a width or height of the current block.

    Video encoding/decoding method and apparatus for performing PDPC and method for transmitting bitstream
    9.
    发明授权
    Video encoding/decoding method and apparatus for performing PDPC and method for transmitting bitstream 有权

    公开(公告)号：US12177450B2

    公开(公告)日：2024-12-24

    申请号：US18234710

    申请日：2023-08-16

    Applicant: LG Electronics Inc.

    Inventor： Jin Heo ,  Hyeong Moon Jang ,  Jangwon Choi

    IPC: H04N19/159 ,  H04N19/105 ,  H04N19/132 ,  H04N19/176 ,  H04N19/186

    Abstract: An image encoding/decoding method and apparatus include features of generating a prediction block by performing intra prediction on a current block, determining whether to apply position dependent intra prediction combination (PDPC) to the prediction block, and generating a final prediction block of the current block, by applying PDPC to the prediction block based on the determination. The determining whether to apply PDPC to the prediction block may include determining whether a size of the current block satisfies a predetermined condition. Based on the size of the current block satisfying the predetermined condition, it may be determined to apply PDPC to the prediction block. Based on the size of the current block not satisfying the predetermined condition, a determination of a color component of the current block may be skipped and it may be determined not to apply PDPC to the prediction block.

    IMAGE ENCODING/DECODING METHOD AND APPARATUS USING QUANTIZATION MATRIX, AND METHOD FOR TRANSMITTING BITSTREAM
    10.
    发明公开
    IMAGE ENCODING/DECODING METHOD AND APPARATUS USING QUANTIZATION MATRIX, AND METHOD FOR TRANSMITTING BITSTREAM 审中-公开

    公开(公告)号：US20240348774A1

    公开(公告)日：2024-10-17

    申请号：US18751625

    申请日：2024-06-24

    Applicant: LG ELECTRONICS INC.

    Inventor： Hyeong Moon Jang ,  Seung Hwan Kim

    IPC: H04N19/105 ,  H04N19/159 ,  H04N19/176 ,  H04N19/186 ,  H04N19/46 ,  H04N19/70

    CPC classification number: H04N19/105 ,  H04N19/159 ,  H04N19/176 ,  H04N19/186 ,  H04N19/46 ,  H04N19/70

    Abstract: An image encoding/decoding method and apparatus are provided. An image decoding method performed by an image decoding apparatus comprises obtaining quantization mode information for a current block from a bitstream, determining whether a quantization matrix for the current block is constructed from a reference quantization matrix, based on the quantization mode information, and constructing the quantization matrix for the current block, based on a result of determination. When the quantization matrix for the current block is constructed from the reference quantization matrix, the quantization matrix for the current block may be constructed based on identification information of the reference quantization matrix. When the quantization matrix for the current block is not constructed from the reference quantization matrix, the quantization matrix for the current block may be constructed based on a value of the quantization matrix obtained from the bitstream. When the current block is an intra-predicted chroma block, the quantization matrix for the current block may be constructed only when a size of the current block is greater than 2×2.

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