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A Fuzzy Entropy-Constrained Vector Quantizer Design Algorithm and Its Applications to Image Coding

Wen-Jyi HWANG, Sheng-Lin HONG

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Summary :

In this paper, a novel variable-rate vector quantizer (VQ) design algorithm using fuzzy clustering technique is presented. The algorithm, termed fuzzy entropy-constrained VQ (FECVQ) design algorithm, has a better rate-distortion performance than that of the usual entropy-constrained VQ (ECVQ) algorithm for variable-rate VQ design. When performing the fuzzy clustering, the FECVQ algorithm considers both the usual squared-distance measure, and the length of channel index associated with each codeword so that the average rate of the VQ can be controlled. In addition, the membership function for achieving the optimal clustering for the design of FECVQ are derived. Simulation results demonstrate that the FECVQ can be an effective alternative for the design of variable-rate VQs.

Publication
IEICE TRANSACTIONS on Fundamentals Vol.E82-A No.6 pp.1109-1116
Publication Date
1999/06/25
Publicized
Online ISSN
DOI
Type of Manuscript
PAPER
Category
Image Theory

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