Generalized substring compression

Orgad Keller, Tsvi Kopelowitz, Shir Landau, Moshe Lewenstein

نتاج البحث: فصل من :كتاب / تقرير / مؤتمرمنشور من مؤتمرمراجعة النظراء


In substring compression one is given a text to preprocess so that, upon request, a compressed substring is returned. Generalized substring compression
is the same with the following twist. The queries contain an additional context
substring (or a collection of context substrings) and the answers are the substring in compressed format, where the context substring is used to make the compression more efficient.
We focus our attention on generalized substring compression and present the
first non-trivial correct algorithm for this problem. Inherent to our algorithm is a
new method for finding the bounded longest common prefix of substrings, which may be of independent interest. In addition, we propose an efficient algorithm for substring compression which makes use of range successor queries. We present several tradeoffs for both problems. For compressing the substring S[i . . j] (possibly with the substring S[α . . β] as a context), the best query times we achieve are O(C) and OC log j−i C for substring compression query and generalized substring compression query, respectively, where C is the number of phrases encoded. A preliminary version of this paper has been presented in [21]
اللغة الأصليةالإنجليزيّة
عنوان منشور المضيفAnnual Symposium on Combinatorial Pattern Matching
عدد الصفحات13
حالة النشرنُشِر - 2009
الحدث20th Annual Symposium on Combinatorial Pattern Matching, CPM 2009 - Lille, فرنسا
المدة: ٢٢ يونيو ٢٠٠٩٢٤ يونيو ٢٠٠٩

سلسلة المنشورات

الاسمLecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)
مستوى الصوت5577 LNCS
رقم المعيار الدولي للدوريات (المطبوع)0302-9743
رقم المعيار الدولي للدوريات (الإلكتروني)1611-3349


!!Conference20th Annual Symposium on Combinatorial Pattern Matching, CPM 2009


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