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Block Lifting Factorization Based Biorthogonal Filter Banks and Its Application for Lossy-to-Lossless Image Coding
A - Abstracts of IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences (Japanese Edition) Vol.J91-A No.12 pp.1181-1189
Publication Date: 2008/12/01
Online ISSN: 1881-0195
Print ISSN: 0913-5707
Type of Manuscript: PAPER
biorthogoanl filter banks,
block lifting structure,
lossy-to-lossless image coding,
Full Text(in Japanese): PDF(505.3KB)
This paper proposes a new image transform method using M-channel biorthogonal filter banks (BOFBs) with an efficient block-lifting factorization. The proposed lifting factorization of a building block in their lattice structure has unity diagonal scaling coefficients and guarantees perfect reconstruction even if the obtained lifting coefficients are quantized. Since the number of rounding operators of proposed lifting-based BOFBs (LBBOFBs) can be reduced by merging the lifting steps, the proposed structure is efficient for lossless image coding. Additionally our LBBOFBs can be also applied to lossy image compression by interrupting the obtained bit stream. Simulation results indicate better performance than conventional methods in terms of both lossless and lossy coding.