• Corpus ID: 17085792

Improving the Speed of LZ77 Compression by Hashing and Suffix Sorting

  title={Improving the Speed of LZ77 Compression by Hashing and Suffix Sorting},
  author={Kunihiko Sadakane and Hiroshi Imai},
  journal={IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences},
  • K. SadakaneH. Imai
  • Published 1 December 2000
  • Computer Science
  • IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences
Two new algorithms for improving the speed of the LZ77 compression are proposed. One is based on a new hashing algorithm named two-level hashing that enables fast longest match searching from a sliding dictionary, and the other uses suffix sorting. The former is suitable for small dictionaries and it significantly improves the speed of gzip, which uses a naive hashing algorithm. The latter is suitable for large dictionaries which improve compression ratio for large files. We also experiment on… 

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