LIPT-Derived Transform Methods Used in Lossless Compression of Text Files

摘要

The present paper refers to the benefits provided in the lossless compression by using preprocessing methods in order to exploit better the redundancy of the source file. The following contributions represent a sequel of the work entitled "Transformed Methods Used in Lossless Compression of Text Files" [20], focusing on the Length-Index Preserving Transform (LIPT). The procedures are derived from LIPT and are known as ILPT, NIT and LIT. These transforms are applied to text files. The algorithms are briefly presented before emphasizing their positive effects on a set of test files chosen from the classical text corpora. Experimental results were performed and some interesting conclusions were driven on their basis.