The book explained the concepts of compression and correction techniques through easy- to-follow examples and schematic diagrams to achieve cost and time effectiveness of communication. Pivotal Difference Method(PDM) and Running Difference Method(RDM) along with repeated use(cascading) on the same input/intermediate stream has been considered to achieve better compressions. Nibble Huffman(NH),LZ and cascading of PDM and RDM are described along with comparison of results on cascading among PDM-NH,RDM-NH, PDM-LZ and RDM-LZ.Implementation of PDM,RDM and arithmetic coding on lossless/lossy...