State assignment of the JPEG statistical model based on a Laplacian distribution

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Other Title
  • ラプラス分布に基づくJPEG統計モデルの状態割り当て
  • ラプラス ブンプ ニ モトヅク JPEG トウケイ モデル ノ ジョウタイ ワリアテ

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Description

In the lossy mode of Joint Photographic Experts Group(JPEG), Discrete Cosign Transform(DCT)coefficients are entropy-coded either Huffman coder or binary arithmetic coder called QM-coder. In the case where QM-coder is employed, DCT coefficients are converted into binary sequences and then context-modeled referring the statistical model. This paper presents that the distributions of AC coefficients are not Gaussian, but Laplacian through Kolmogorov-Smirnov(KS)test statistic. Furthermore we propose a state assignment scheme based on a Laplacian distribution to achieve higher compression performance than JPEG.

Journal

  • ITE Technical Report

    ITE Technical Report 23.79 (0), 55-60, 1999

    The Institute of Image Information and Television Engineers

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