G.729B编解码算法在DM642上的实现与优化

语音通信是多媒体通信的基础，为了提高语音通信的效率与质量，对高质量低位率静音压缩算法G.729B进行了研究，将该算法移植到．11公司最新一代定点数字信号处理器TMS320DM642上，并讨论了其在TMS320DM642上优化的关键技术，最终实现了高效率的语音编解码器。通过试验证明，G．729B在借助TMS320DM642的情况下，传输位率大大降低，并且保持了较高的语音音质，有利于实现高质量的多媒体通信。

Implementation and Optimization of G.729B Encoding Algorithm on DM642

Phonetic communication is the base of multimedia communication. In order to improve the efficiency and quality of phonetic communication, the good quality low-bit-rate silence compression algorithm G, 729B is studied, and the algorithm has been transplanted in the newest fixed-point digital signal processor TMS320DM642 of TI. The critical technology of the optimization in TMS320DM642 is discussed. Thus the high efficient phonetic encoder is implemen~d. The experiment shows that cooperating with TMS320DM642, G, 729B lowers the transmission bit-rate, at the same time keeps higher phonetic quality. This will be helpful for high-quality multimedia communication.