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A fast on-line adaptive code

There are two classes of data compression algorithms. One class has redundancy log log n+O(1), where n is the alphabet size, and an encoding time O(log/sup 2/ n), n to infinity . The other has redundancy O(1) and an encoding time O(n). A code is presented combining advantages of both classes of comp...

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Bibliographic Details
Published in:IEEE transactions on information theory 1992-07, Vol.38 (4), p.1400-1404
Main Author: Ryabko, B.Y.
Format: Article
Language:English
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Summary:There are two classes of data compression algorithms. One class has redundancy log log n+O(1), where n is the alphabet size, and an encoding time O(log/sup 2/ n), n to infinity . The other has redundancy O(1) and an encoding time O(n). A code is presented combining advantages of both classes of compression methods: its redundancy is O(1) and the encoding and decoding time is O(log/sup 2/ n) per letter, which is close to the lower bound O(log n).< >
ISSN:0018-9448
1557-9654
DOI:10.1109/18.144725