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lz78 compression

lz78 compression in Technology

A substitutional compression scheme which works by entering phrases into a dictionary and then, when a reoccurrence of that particular phrase is found, outputting the dictionary index instead of the phrase. Several algorithms are based on this principle, differing mainly in the manner in which they manage the dictionary.
The most well-known Lempel-Ziv scheme is Terry Welch's Lempel-Ziv Welch variant of LZ78.
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The Free On-line Dictionary of Computing, © Denis Howe 2010 http://foldoc.org
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