J. Ziv and A. Lempel. Compression of individual sequences via variable length coding. IEEE Trans. Inf. Theory, 24:530--536, 1978. A The Simple Optimized Algorithm in Detail Search (P,m,Z,n) /* Preprocessing */ for (i 2 1 : : : m, c 2 \Sigma ) B(i; c) / i for (i 2 1 : : : m) for (j 2 i : : : m) B(j;P i ) / j \Gamma i  Home/Search   Document Not in Database   Summary   Related Articles

....using O(m) extra space [3, 6] A particularly interesting case of string matching is related to text compression. Text compression [4] tries to exploit the redundancies of the text to represent it using less space. There are many different compression schemes, among which the Ziv Lempel family [23, 24] is one of the best in practice because of their good compression ratios combined with efficient compression and decompression time. The compressed matching problem was first defined in the work of Amir and Benson [1] as the task of performing string matching in a compressed text without ....

....in practical terms. The second line of research considers Ziv Lempel compression, which is based on finding repetitions in the text and replacing them with references to similar strings previously appeared. LZ77 [23] is able to reference any substring of the text already processed, while LZ78 [24] and LZW [20] reference only a single previous reference plus a new letter that is added. String matching in Ziv Lempel compressed texts is much more complex, since the pattern can appear in different forms across the compressed text. The first algorithm for exact searching is from 1994 [2] which ....

[Article contains additional citation context not shown here]

J. Ziv and A. Lempel. Compression of individual sequences via variable length coding. IEEE Trans. Inf. Theory, 24:530--536, 1978. A The Simple Optimized Algorithm in Detail Search (P,m,Z,n) /* Preprocessing */ for (i 2 1 : : : m, c 2 \Sigma ) B(i; c) / i for (i 2 1 : : : m) for (j 2 i : : : m) B(j;P i ) / j \Gamma i

Online articles have much greater impact   More about CiteSeer.IST   Add search form to your site   Submit documents   Feedback  

CiteSeer.IST - Copyright Penn State and NEC