A Dynamic 5 Bit Data Compression Scheme by Using Set Change Table (5BDC)

Data compression is the process of modifying, encoding or converting the bit structure of data in such a way that it consumes less space. Character encoding is quite related to data compression which represents a character by some kind of encoding system. Encoding is the process of representing individual characters using a corresponding encoding system made up of other symbols and types of data. Data compression covers a huge area of applications including data communication, data storage and database technology. In this paper, a data compression technique named 5BDC is developed based on character encoding system. This system converts every 8 bit character to 5 bit. Actually, this 5BDC method splits characters into 4 set by set representation and set change table. The results of the 5BDC technique are again applied to compress by the commonly known algorithms Huffman and LZW. Promising performance is shown by our experimental result. The technique is further explained by some examples and descriptions.