Position index preserving compression of text data

Abstract

Data compression offers an attractive approach to reducing communication cost by using available bandwidth effectively. It also secures data during transmission for its encoded form. In this paper an index based position oriented lossless text compression called PIPC ( Position Index Preserving Compression) is developed. In PIPC the position of the input word is denoted by ASCII code. The basic philosopy of the secure compression is to preprocess the text and transform it into some intermediate file which can be compressed with better efficiency and which exploits the natural redundancy of the languaje in making the transformation. The proposed algorithm compresses the data 35 % to 50 % of its original size depending on occurrence of repeat word