Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/2639
Title: A study on data compression by dynamical system approach
Authors: Lam, Fung-yee
Keywords: Data compression (Computer science)
Hong Kong Polytechnic University -- Dissertations
Issue Date: 2001
Publisher: The Hong Kong Polytechnic University
Abstract: The importance and demands for data compression have been increasing rapidly, especially with the growing popularity of Internet access and multimedia personal entertainment. The ratio and the quality of compression data are main concern when judging the compression algorithm. Recently, data compression techniques are dominated by the fast Fourier and wavelet transforms, which approximate the given sequence as a linear sum of the basis function, by retaining a finite number of coefficients to achieve the goal of compression. In this project, we introduce a dynamical system approach, which compresses data in a totally different way from the ones mentioned above. Taking advantage of the fact that Leaky-integrator model recurrent neural net can approximate arbitrary finite sequence, we demonstrate in this thesis how to compress UV and IR spectrum by a discrete-time recurrent neural net. As this is an initial valued problem, the information we need to store is the parameters of the system and the initial states. Compression ratio is also discussed in this thesis.
Description: 108 leaves : ill. (some col.) ; 30 cm.
PolyU Library Call No.: [THS] LG51 .H577M AMA 2001 Lam
URI: http://hdl.handle.net/10397/2639
Rights: All rights reserved.
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