TETRA语音编解码算法的DSP实现及其优化设计

DSP Based Implementation of TETRA Speech Codec and Its Optimization

讨论了基于TMS320C54xDSP的TETRA语音编解码实现方法,给出了代码优化原则及用汇编语言改写关键代码的方法及技巧.通过对语音编解码算法的优化设计,使得算法的计算量大大降低,理论分析和调试结果表明:优化后的算法能达到通信的实时性要求,具有一定的应用价值.该优化设计方法对其它语音编解码标准的DSP实现具有较大的参考价值.

In this paper, we investigate the implementation of TETRA speech codec based on TMS320C54x. We also provide the optimization principle and the techniques of using assembly language to optimize the key codes. Through the optimization of the algorithm codes, the computational complexity is greatly reduced, which makes the availability of the real-time implementation of the codec algorithm on TMS320C54x based system. The results have been shown by theoretical analysis and system test. The optimization method proposed in this paper is valuable to the DSP implementation of other speech coding standards.