Differential Ziv-Lempel Text Compression

A General Practical Approach to Pattern Matching over Ziv-Lempel Compressed Text

We address in this paper the problem of string matching on Lempel-Ziv compressed text. The goal is to search a pattern in a text without uncompressing. This is a highly relevant issue, since it is essential to have compressed text databases where eecient searching is still possible. We develop a general technique for string matching when the text comes as a sequence of blocks. This abstracts th...

Byte pair encoding : a text compression scheme that accelerates pattern matching

Byte pair encoding (BPE) is a simple universal text compression scheme. Decompression is very fast and requires small work space. Moreover, it is easy to decompress an arbitrary part of the original text. However, it has not been so popular since the compression is rather slow and the compression ratio is not as good as other methods such as Lempel-Ziv type compression. In this paper, we bring ...

Lempel - Ziv Compression of Stru tured Text

Fast Relative Lempel-Ziv Self-index for Similar Sequences

Recent advances in biotechnology and web technology are generating huge collections of similar strings. People now face the problem of storing them compactly while supporting fast pattern searching. One compression scheme called relative Lempel-Ziv compression uses textual substitutions from a reference text as follows: Given a (large) set S of strings, represent each string in S as a concatena...

Lempel-Ziv Dimension for Lempel-Ziv Compression

This paper describes the Lempel-Ziv dimension (Hausdorff like dimension inspired in the LZ78 parsing), its fundamental properties and relation with Hausdorff dimension. It is shown that in the case of individual infinite sequences, the Lempel-Ziv dimension matches with the asymptotical Lempel-Ziv compression ratio. This fact is used to describe results on Lempel-Ziv compression in terms of dime...