Burrows--Wheeler compression with variable length integer codes

  • Authors:
  • Peter Fenwick

  • Affiliations:
  • Department of Computer Science, The University of Auckland, Auckland, New Zealand

  • Venue:
  • Software—Practice & Experience
  • Year:
  • 2002

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Abstract

The final coder in Burrows-Wheeler compression is usually either an adaptive Huffman coder (for speed) or a complex of arithmetic coders for better compression. This article describes the use of conventional pre-defined variable length codes or universal codes and shows that they too can give excellent compression. The paper also describes a 'sticky Move-to-Front' modification which gives a useful improvement in compression for most files.