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    METHODS AND DEVICES FOR QUANTIZATION AND DE-QUANTIZATION DESIGN IN VIDEO CODING
    36.
    发明公开
    METHODS AND DEVICES FOR QUANTIZATION AND DE-QUANTIZATION DESIGN IN VIDEO CODING 审中-实审

    公开(公告)号：EP4429237A2

    公开(公告)日：2024-09-11

    申请号：EP24190885.4

    申请日：2020-09-23

    申请人： Beijing Dajia Internet Information Technology Co., Ltd.

    发明人： JHU, Hong-Jheng ,  XIU, Xiaoyu ,  WANG, Xianglin ,  CHEN, Yi-Wen ,  MA, Tsung-Chuan ,  YU, Bing

    IPC分类号： H04N19/119

    CPC分类号： H04N19/119 ,  H04N19/70 ,  H04N19/186 ,  H04N19/124

    摘要： A method for video encoding is provided. The method includes: determining, for a first coding block, a quantization parameter and a quantized level; deriving a scale value by looking up a scale level table based on the quantization parameter; and if the first coding block is coded in a transform skip mode, obtaining a residual sample for a sample in the first coding block based on the quantized level, the scale value and a plurality of bit-shifts by applying a first de-quantization operation; wherein the first de-quantization operation is also applied to obtain a reconstructed sample for an escape sample in a second coding block coded in a palette mode; and wherein a block size of the first coding block or the second coding block is not used for determining parameters of the first de-quantization operation, wherein the first de-quantization operation is as follows: pSample=pLevel×decScaleQP%6×2QP/626