Video decoding method and video encoding method

Video decoding method and video encoding method

  • CN 107,580,230 B
  • Filed: 01/21/2013
  • Issued: 08/20/2021
  • Est. Priority Date: 01/20/2012
  • Status: Active Grant
First Claim
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1. A video decoding method, comprising:

  • determining a prediction scheme of a quantization matrix used in the inverse quantization; and

    decoding a quantization matrix used in inverse quantization according to a prediction scheme of the quantization matrix,wherein the prediction scheme of the quantization matrix is any one of a prediction scheme between coefficients in the quantization matrix and a quantization matrix copy scheme,wherein when the flag information is 1, the prediction scheme of the quantization matrix is determined as a prediction scheme between coefficients in the quantization matrix, and when the flag information is 0, the prediction scheme of the quantization matrix is determined as a quantization matrix copy scheme,wherein when the prediction scheme of the quantization matrix is a quantization matrix copy scheme, the quantization matrix is determined based on the identification information,wherein when the identification information is 0, the quantization matrix is determined as a default quantization matrix, and when the identification information is not 0, the identification information is used to determine a reference quantization matrix,wherein when the identification information is not 0, coefficient values of the quantization matrix are determined to be the same as coefficient values of a reference quantization matrix derived by using the identification information,wherein the quantization matrix is specified according to a prediction mode, a color component type and a size of a block using the quantization matrix,wherein the identification information indicates a difference between matrixID indicating a prediction mode used in a quantization matrix to be decoded and a color component type of the quantization matrix and RefMatxID indicating a prediction mode used in the reference quantization matrix and a color component type of the reference quantization matrix,wherein the quantization matrix (ScalingList [ sizeID ] [ matrixID ] [ i ]) to be decoded is determined from the reference quantization matrix (ScalingList [ sizeID ] [ RefMatrixId ] [ i ]) by;

    ScalingList[sizeID][matrixID][i]=

    ScalingList[sizeID][RefMatrixId][i]。

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