In this paper we address the problem of searching in LZW compressed text directly, and present a new algorithm for finding multiple patterns by simulating the move of the Aho-Corasick pattern matching machine. The new algorithm finds all occurrences of multiple patterns whereas the algorithm proposed by Amir, Benson, and Farach finds only the first occurrence of a single pattern. The new algorithm runs in O(n + m2 + r) time using O(n + m2) space, where n is the length of the compressed text, m is the length of the total length of the patterns, and r is the number of occurrences of the patterns. We implemented a simple version of the algorithm, and showed that it is approximately twice faster than a decompression followed by a search using the Aho-Corasick machine.
|ジャーナル||Data Compression Conference Proceedings|
|出版ステータス||Published - 1998 1 1|
|イベント||Proceedings of the 1998 Data Compression Conference, DCC - Snowbird, UT, USA|
継続期間: 1998 3 30 → 1998 4 1
ASJC Scopus subject areas
- コンピュータ ネットワークおよび通信