TMS320C54X实现GSM语音编解码器

ＧＳＭ系统的全称是泛欧数字蜂窝移动通信系统。它在世界三大移动通信系统（美国的ＡＤＣ系统，日本的ＰＤＣ系统）中应用的国家和地区最广，其中包括我国。ＧＳＭ采用了低码率、低运算量的规则脉冲激励－长时线性预测编码（ＲＰＥ－ＬＴＰ）。本文在简要介绍了ＲＰＥ－ＬＴＰ编码算法后，着重讨论了这种算法在定点数字信号处理芯片ＴＭＳ３２０Ｃ５４Ｘ上实现的软、硬件设计和实现中的一些关键技术，并给出了实验结果

Implementation of GSM Speech Codec on TMS320C54X

GSM represents Pan European digital mobile radio system. The most famous mobile radio systems of the world(ADC from America, PDC from Japan), are widely used, including in China. GSM uses 13kbit/s regular pulse excitation long term prediction (RPE LTP) linear predictive coder. In this paper, the algorithm of RPE LTP is briefly reviewed at first, then some key techniques for the real time implementation of RPE LTP based on TMS320C54X chip are introduced in detail, and finally experimental results are presented.