Video encoding and decoding device using quantization matrix

Video encoding and decoding device using quantization matrix

  • CN 109,194,958 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 encoding device, comprising:

  • a quantization module configured to determine a quantization matrix to be used in quantization and perform quantization; and

    an entropy encoding module configured to encode information on the quantization matrix 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 the quantization matrix has a size of 4x4, 8x8, 16x16 or 32x32,wherein the flag information is set to 1 if the prediction scheme of the quantization matrix is determined as the prediction scheme between coefficients in the quantization matrix, is set to 0 if the prediction scheme of the quantization matrix is determined as the 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 the identification information is set to 0 if the quantization matrix is determined as a default quantization matrix, is not set to 0 if 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 encoded 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 encoded is determined from the reference quantization matrix (ScalingList [ sizeID ] [ RefMatrixId ] [ i ]) by;

    ScalingList[sizeID][matrixID][i]=

    ScalingList[sizeID][RefMatrixId][i]。

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