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6 - Text Compression

Published online by Cambridge University Press:  10 June 2021

Maxime Crochemore ,
Thierry Lecroq  and
Wojciech Rytter
Maxime Crochemore
Affiliation:
Université Paris-Est
Thierry Lecroq
Affiliation:
University of Rouen Normandy
Wojciech Rytter
Affiliation:
Warsaw University
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Summary

The chapter is devoted to several methods of the practically important area of conservative text compression. The first eight problems concern different types of text compression: Burrows- Wheeler transform, Lempel-Ziv coding, Huffman coding and Run-length encoding. They are completely different but used in common situations. In particular there is a problem about efficient arithmetic operations on really large numbers given in their run-length encoding. In the same spirit several unrelated but interesting problems are presented about compacted automata representing all factors of special words, about pattern-matching in compressed words, about compressing suffix arrays and about the compression ratio of greedy superstrings. All these problems show how to deal with large data using compression.

Keywords

run-length codingHuffman codingLempel- Ziv codingBurrows- Wheeler transformcompressed matchingcompressing Suffix arraysuperstring
Type
Chapter
Information
125 Problems in Text Algorithms
with Solutions
 , pp. 230 - 274
Publisher: Cambridge University Press
Print publication year: 2021

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