Ambe And Cvsd Cascade Study On The Problems And Solutions

This paper introduces basic knowledge of speech compress coding, CVSD and AMBE arithmetic and tow methods of solving the problem of the project. This new methods receives good performance, and satisfies the concrete requirement of engineering project .The whole paper is made up of five chapters.The first two chapters introduce the development and tendency of speech compressing coding, and a brief presentation to the background of processing speech.The third chapter introduce the working principles of CVSD and AMBE are presented in the third chapter.The fourth chapter, on the basis of analyzing the working theory of CVSD and AMBE, and the reason for the intelligibility descend, a specific strengthen arithmetic which is mainly aimed at the combination of CVSD and AMBE is narrated.In the fifth chapter, due to the problem in the engineering project, this essay from a new point of view puts forward a new arithmetic to resolve the combination, and realizes the combination by hardware.