Source Coding and Channel Coding for Mobile Multimedia Communication

In the early era of communications engineering, the emphasis was on establishing links and providing connectivity. With the advent of new bandwidth hungry applications, the desire to fulfill the user’s need became the main focus of research in the area of data communications. It took about half a century to achieve near channel capacity limit in the year 1993, as predicted by Shannon (Shannon, 1948). However, with the advancement in multimedia technology, the increase in the volume of information by the order of magnitude further pushed the scientists to incorporate data compression techniques in order to fulfill the ever increasing bandwidth requirements. According to Cover (Cover & Thomas, 2006), the separation theorem stated by Shannon implies that it is possible for the source and channel coding to be accomplished on separate and sequential basis while still maintaining optimization. In the context of multimedia communication, the former represents the compression while the latter, the error protection. A major restriction, however, with this theorem is that it is applicable only to asymptotically lengthy blocks of data and in most situations cannot be a good approximation. So, these shortcomings have tacitly led to devising new strategies for joint-source channel coding.