Analysis/synthesis systems for progressive-to-lossless embedded wavelet image coding (MA-P7)

Author(s) : Kunitoshi Komatsu (University of Tokyo, Japan) Kaoru Sezaki (University of Tokyo, Japan)

Abstract : In this paper, we investigate analysis/synthesis systems for progressive to lossless embedded wavelet image coding. We propose a system which does not use an inverse lossless wavelet transform (ILWT) but an inverse wavelet transform (IWT). In this system, we must correct the mean value of each band. We also investigate a mixed type system which is obtained by applying repeatedly a 4-band non-separable forward lossless wavelet transform (FLWT) for the lowest frequency band. The simulation shows that the PSNR of the reconstructed image of the non-separable FLWT followed by IWT is 2.7dB higher than that of the separable FLWT followed by ILWT at a bit rate and that a system using the mixed type system has good performance at all bit rates.

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