码分多址系统语音编码的研究

Research on the Speech Signal Coding of CDMA

作者在本文对码分多址系统（ＣＤＭＡ———ＣｏｄｅＤｉｖｉｓｉｏｎＭｕｌｔｉｐｌｅＡｃｃｅｓ）的语音编码技术作了探讨。首先阐述了ＣＤＭＡ语音编码的基本原理，然后介绍了对语音参数中的线谱对（ＬＳＰ）量化所作的改进，提出了比原方案全速率降低５５０ｂｉｔ／ｓ的一种新方法。

This paper deals with the Speech Signal Coding Scheme in CDMA(Code Division Multiple Access) by first stating the basic principles of speech coding in CDMA, then proposing a new method for improving the LSP (Linear Spectrum Pair) quantizer in the speech signal parameters which can reduce 550bit/s at rate 1 in comparison with the original method, and finally comparing the results produced respectively by the original and improved speech coding schemes through MATLAB simulation.