Fixed Block Compression Boosting in FM-Indexes
Data Structures and Algorithms
2011-04-20 v1 Information Retrieval
Abstract
A compressed full-text self-index occupies space close to that of the compressed text and simultaneously allows fast pattern matching and random access to the underlying text. Among the best compressed self-indexes, in theory and in practice, are several members of the FM-index family. In this paper, we describe new FM-index variants that combine nice theoretical properties, simple implementation and improved practical performance. Our main result is a new technique called fixed block compression boosting, which is a simpler and faster alternative to optimal compression boosting and implicit compression boosting used in previous FM-indexes.
Cite
@article{arxiv.1104.3810,
title = {Fixed Block Compression Boosting in FM-Indexes},
author = {Juha Kärkkäinen and Simon J. Puglisi},
journal= {arXiv preprint arXiv:1104.3810},
year = {2011}
}