基于DSP的G.729语音编解码器的实时实现

随着信息技术的发展,需要在有限的带宽下传送更多的数据,数据压缩技术日趋重要.国际电信联盟（ITU）推出的G.729协议是基于共扼结构——代数码激励线性预测的语音编解码算法.提出了基于TMS320VC5402的硬件实现方案,设计与实现了G.729语音采集与处理系统,并针对算法进行了软件优化,优化后的算法复杂度为48.5MIPS,达到了在目标系统上实时实现的目标.

Real-time Implementation of G.729 Speech Coder Based on DSP

With the development of information technology the technology of data compression becomes more important because more data needs to be transmitted with limited bandwidth.G.729 protocol proposed by ITU is a kind of speech compression coding technology based on Conjugate Structure Algebraic Code Excited Linear Prediction algorithm.This paper introduces the principle of the G.729 coder algorithm.Then a hardware design based on TMS320VC5402 is discussed to implement the system of G.729 speech acquisition and processing.The optimization solution of the software design is given in order to realize the algorithm at realtime.The optimized algorithm consumes 48.5MIPS and the result is satisying.