G.723.1编解码器在TMS320C50上的优化实现

Implementation of ITU-T G.723.1 speech codec on TMS320C50

数字信号处理器在语音编解码中得到广泛应用。在简要介绍TMS320C50定点DSP芯片和ITU-TG.723.1语音编解码算法后,详细讨论了G.723.1在TMS320C50上的实现及其技术要点,主要是内存安排、算法和代码优化、数据精度等。设计的编解码器通过了ITU-TG.723.1标准测试数据测试,占用内存资源较少,并具备较高的编解码速度。

Digital signal processor is widely used in speech coding and decoding process.This paper after introduced TMS320C50 fixed point DSP chip and the algorithm of ITU-T G.723.1 briefly,addressed the implementation of G.723.1 codec on TMS320C50.Some key design techniques,such as memory allocation,algorithm optimization and calculation precision processing were presented in detail.The realized codec not only can pass all the ITU-TG.723.1 standard test sequences,but also performs high running efficiency with reasonable memory management.