Optimal Pattern Matching in LZW Compressed Strings

نویسندگان

چکیده

برای دانلود باید عضویت طلایی داشته باشید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Almost Optimal Fully LZW-Compressed Pattern Matching

Given two strings: pattern P and text T of lengths jPj =M and jT j = N . A string matching problem is to nd all occurrences of pattern P in text T . A fully compressed string matching problem is the string matching problem with input strings P and T given in compressed forms p and t respectively, where jpj = m and jtj = n. We present rst, almost optimal, string matching algorithms for LZW-compr...

متن کامل

Multiple Pattern Matching in LZW Compressed Text

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 algori...

متن کامل

An efficient pattern matching scheme in LZW compressed sequences

Compressed pattern matching (CPM) is an emerging research field addressing the problem: given a compressed sequence and a pattern, process the sequence with minimal (or no) decompression to find the pattern occurrence(s) in the uncompressed sequence. It can be applied to detect malwares and confidential information leakage in compressed files directly. In this paper, we report our work of CPM i...

متن کامل

Shift-And Approach to Pattern Matching in LZW Compressed Text

This paper considers the Shift-And approach to the problem of pattern matching in LZW compressed text, and gives a new algorithm that solves it. The algorithm is indeed fast when a pattern length is at most 32, or the word length. After an O(m + |Σ|) time and O(|Σ|) space preprocessing of a pattern, it scans an LZW compressed text in O(n + r) time and reports all occurrences of the pattern, whe...

متن کامل

Beating O(nm) in approximate LZW-compressed pattern matching

Given an LZW/LZ78 compressed text, we want to find an approximate occurrence of a given pattern of length m. The goal is to achieve time complexity depending on the size n of the compressed representation of the text instead of its length. We consider two specific definitions of approximate matching, namely the Hamming distance and the edit distance, and show how to achieve O(n √ mk) and O(n √ ...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

ژورنال

عنوان ژورنال: ACM Transactions on Algorithms

سال: 2013

ISSN: 1549-6325,1549-6333

DOI: 10.1145/2483699.2483705