CODE EXCITED LINEAR PREDICTIVE SPEECH CODING

Abstract

Speech coding has been an ongoing area of research for several decades. Although with the emergence of optical fibers bandwidth in wired communications has become inexpensive, there is a growing need for bandwidth compression and enhanced privacy in wireless cellular and satellite communications. Designers of cellular communications systems, wireless personal computer networks (PCN), and multimedia systems are all searching for improved techniquesfor handling speech. Since its awkward beginings in 1930's, speech coding has developed to become an essential feature of everyday telephone system operations. Speech coding is now finding applications in voice mail, voice transmission over packet networks, voice encryption, digital cellular networks, computer systems, automation, military communications, biomedical systems and almost every where that digital communication takes hold........