Date Added: Apr 2013
In current scenario of wireless communication system, quality of voice output is degraded due to its limited bandwidth (300-3400 Hz) and power constraints which in turn offers speech sounding muffled and thin. Recent wireless systems involved in transmission of speech demands evolution of efficient and effective methods for maintaining quality of speech, especially at the receiving end. In order to obtain toll quality of speech and high intelligibility cum naturalness in wireless systems, NB speech coders should be upgraded to its counterpart WB coders (50-7000Hz). For the effective utilization of WB speech communication in wireless media, it is indeed necessary to upgrade both end devices and network to be WB compatible which is costly and time consuming affairs.