On Bijective Variants of the Burrows-Wheeler Transform
On Bijective Variants of the Burrows-Wheeler Transform
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关于 Burrows-Wheeler 变换的双射变体
DOI:
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发表时间:
2009
期刊:
影响因子:
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通讯作者:
Manfred Kufleitner
中科院分区:
文献类型:
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作者:
Manfred Kufleitner
The sort transform (ST) is a modification of the Burrows-Wheeler transform (BWT). Both transformations map an arbitrary word of length n to a pair consisting of a word of length n and an index between 1 and n. The BWT sorts all rotation conjugates of the input word, whereas the ST of order k only uses the first k letters for sorting all such conjugates. If two conjugates start with the same prefix of length k, then the indices of the rotations are used for tie-breaking. Both transforms output the sequence of the last letters of the sorted list and the index of the input within the sorted list. In this paper, we discuss a bijective variant of the BWT (due to Scott), proving its correctness and relations to other results due to Gessel and Reutenauer (1993) and Crochemore, Desarmenien, and Perrin (2005). Further, we present a novel bijective variant of the ST.