Preface

The Engineering of a Compression Booster: Theory Vs Practice in BWT Compression

Forewords-Special Issue Combinatorial Pattern Matching 2011

The Myriad Virtes of Wavelet Trees

A new data structure, the wavelet tree, is analysied and discussed with particular attention to data compression

The Myriad Virtues of Suffix Trees

Wavelet Trees have been introduced in [Grossi, Gupta and Vitter, SODA ’03] and have been rapidly recognized as a very flexible tool for the design of compressed full-text indexes and data compressors. Although several papers have investigated the beauty and usefulness of this data structure in the full-text indexing scenario, its impact on data compression has not been fully explored. In this paper we provide a complete theoretical analysis of a wide class of compression algorithms based on Wavelet Trees. We also show how to improve their asymp- totic performance by introducing a novel framework, called Generalized Wavelet Trees, that aims for the best combination of binary compressors (lik…