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    • 10. 发明专利
    • Image decoding method and apparatus relying on intra prediction in image coding system
    • AU2022252821A1
    • 2022-11-10
    • AU2022252821
    • 2022-10-14
    • LG ELECTRONICS INCLG ELECTRONICS INC
    • HEO JIN
    • H04N19/593H04N19/105H04N19/14H04N19/176
    • Abstract A method of decoding video performed by a decoding device, the method comprising: deriving an intra prediction mode of a current block from prediction mode information; deriving neighboring samples including upper neighboring samples of the current block; and generating prediction samples of the current block based on the intra prediction mode and the neighboring samples of the current block, wherein the upper neighboring samples include upper neighboring samples of an n-th row located in an upward direction away from an uppermost row of the current block, wherein n is positive integer more than 1, wherein a number of the upper neighboring samples of the n-th row is more than 2N based on a size of the current block being NxN, wherein N is a positive integer, wherein sample values of additional upper neighboring samples located to right of a 2N-th upper neighboring sample among the upper neighboring samples of the n-th row are derived to be equal to a sample value of the 2N-th upper neighboring sample without determining whether the additional upper neighboring samples are positioned at unavailable sample positions, and wherein coordinates of the 2N-th upper neighboring sample is (2N-1, -n) based on coordinates of the top-left sample in the current block being (0, 0).