Reversible 2D 9-7 DWT Based on Non-separable 2D Lifting Structure Compatible with Irreversible DWT

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概要

• 論文の詳細を見る

• This paper proposes a reversible two dimensional (2D) discrete wavelet transform (DWT) for lossless coding which is compatible with the irreversible 2D 9-7 DWT for lossy coding in the JPEG 2000. Since all the filters and scalings are factorized into a product of lifting steps, and signal values are rounded into integers, the proposed DWT is reversible and applicable to lossless coding of 2D signals. We replace a part of the separable 2D transfer function of the 2D DWT by a non separable 2D lifting structure, so that the number of rounding operations is decreased. We also investigate performance of the DWT under octave decomposition case and theoretically endorse it. As a result, reduction of the rounding errors due to the replacement was confirmed. It means that compatibility of the reversible DWT to the irreversible 2D 9-7 DWT is improved.

• （社）電子情報通信学会の論文
• 2011-10-01

著者

• Iwahashi Masahiro

  Nagaoka Univ. Technol. Nagaoka‐shi Jpn

• Kiya Hitoshi

  Tokyo Metropolitan Univ.

• Iwahashi Masahiro

  Nagaoka Univ. Of Technol.

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• Reversible 2D 9-7 DWT Based on Non-separable 2D Lifting Structure Compatible with Irreversible DWT

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