Paper Abstract and Keywords |
Presentation |
2005-09-16 15:35
Wavelet-Based Lossless Image Coding Using a Complex Allpass Filter Noriaki Fukuda (Nagaoka Univ. of Tech.), Xi Zhang (Univ. of Electro-Comm.), Toshinori Yoshikawa, Yoshinori Takei, Yasunori Sugita (Nagaoka Univ. of Tech.) |
Abstract |
(in Japanese) |
(See Japanese page) |
(in English) |
To obtain a better coding performance in wavelet-based image compression, it is necessary for wavelet filter banks to satisfy orthogonality condition and linear phase characteristic. To satisfy these conditions, a class of IIR wavelet filters have been proposed by using a complex allpass filter, and then a better coding performance has been obtained for lossy image coding. In this paper, we propose an effective implementation of reversible wavelet transform by using a complex allpass filter. The experimental results show that the proposed wavelet filters can obtain a comparable lossless performance and a better lossy performance at low bitrate than the conventional wavelets. |
Keyword |
(in Japanese) |
(See Japanese page) |
(in English) |
complex allpass filter / reversible wavelet transform / lossless coding / lossy coding / image compression / / / |
Reference Info. |
IEICE Tech. Rep., vol. 105, no. 275, CAS2005-45, pp. 67-72, Sept. 2005. |
Paper # |
CAS2005-45 |
Date of Issue |
2005-09-09 (CAS, NLP) |
ISSN |
Print edition: ISSN 0913-5685 |
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