Pubblicazioni
| Autori: | Travis Gagie |
| Giovanni Manzini | |
| Area Scientifica: | Text Compression and Indexing |
| Titolo: | Move-to-Front, Distance Coding, and Inversion Frequencies Revisited |
| Apparso su: | TR-INF-2008-03-02-UNIPMN |
| Editore: | Computer Science Department, UPO |
| Anno: | 2008 |
| Tipo Pubblicazione: | Technical Report |
| URL: | http://www.di.unipmn.it...R-INF-2008-03-02-UNIPMN.pdf |
| Sommario: | Move-to-Front, Distance Coding and Inversion Frequencies are three somewhat related techniques used to process the output of the Burrows-Wheeler Transform. In this paper we analyze these techniques from the point of view of how effective they are in the task of compressing low-entropy strings, that is, strings which have many regularities and are therefore highly compressible. This is a non-trivial task since many compressors have non-constant overheads that become non-negligible when the input string is highly compressible. Because of the properties of the Burrows-Wheeler transform, being |