Space efficient linear time lempel-ziv factorization for small alphabets

Keisuke Goto, Hideo Bannai

Research output: Chapter in Book/Report/Conference proceedingConference contribution

26 Citations (Scopus)


We present a new linear time algorithm for computing the Lempel-Ziv Factorization (LZ77) of a given string of length N on an alphabet of size σ, that utilizes only Nlog N + O(σ log N) bits of working space. When the alphabet size is small, this greatly improves the previous best space requirement for linear time LZ77 factorization (Kärkkäinen et al. CPM 2013), which is 2Nlog N bits, i.e. two integer arrays of length N. Experiments show that despite the added complexity of the algorithm, the speed of the algorithm is only around two to three times slower than previous fastest linear time algorithms.

Original languageEnglish
Title of host publicationProceedings - DCC 2014
Subtitle of host publication2014 Data Compression Conference
PublisherInstitute of Electrical and Electronics Engineers Inc.
Number of pages10
ISBN (Print)9781479938827
Publication statusPublished - 2014
Event2014 Data Compression Conference, DCC 2014 - Snowbird, UT, United States
Duration: Mar 26 2014Mar 28 2014

Publication series

NameData Compression Conference Proceedings
ISSN (Print)1068-0314


Other2014 Data Compression Conference, DCC 2014
Country/TerritoryUnited States
CitySnowbird, UT

All Science Journal Classification (ASJC) codes

  • Computer Networks and Communications


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