A Novel Source Coding Technique With High Convergence Speed Based on the LZW Algorithm

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The LZW(Lempel-Ziv-Welch) data compression method is the most popular universal coding algorithm and used in several practical systems. The LZ W method, however, has following two disadvantages: the compression ratio converges too slowly and the compressibility is poor when the entropy of the information source is very high. In order to alleviate these disadvantages, we propose a novel source coding technique based on the LZW Algorithm and a splay tree. Our proposed method is superior to the LZW method in terms of universality and convergency. Especially, it is very effective to compress the high entropy information source.

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