基于TMS320VC5421的多制式语音编码的实现

Realization of TMS320VC5421-based multi-mode speech coding

介绍了一种多制式语音编解码器，完成4路语音的全双工通信，简单介绍了组成系统的核心器件——DSP芯片TMS320VC5421的硬件特点，提出实现G.729、CVSD、ADPCM算法之间的编码转换方法，并给出了算法的软硬件实现，实验结果表明，该方法以较少的运算量及较少的硬件资源获得了较高的语音编码质量，是一种灵活可行的语音编码方式。

A multi-mode speech coding and decoding circuit is presented for realizing the 4 channel full duplex speech communication. The hardware features of DSP chip TMS320VC5421 are proposed, which is the core component of this system. The coding transformation between G. 729, CVSD and ADPCM algorithms is demonstrated and the realization of the software and hardware is given. Experimental results show that this algorithm can obtain high quality speech coding with lesser operation and hardware resource.