G.718宽带语音编解码器的DSP实现及优化

Implementation and optimization of G.718 speech codec algorithm based on DSP

G.718是ITU-T最新提出的一种嵌入式可变速率宽带语音和音频编解码标准,该算法将语音信号进行分类编码,算法复杂度大大增加,但可以在窄带和宽带均达到极佳的语音质量。在分析其算法原理和关键技术的基础上,结合TMS320C55x系列DSP平台和G.718算法特点,提出了合理的汇编优化实现方案,在TMS320C5505EVM上完成了实时宽带语音编解码器。实验测试表明,G.718算法的语音质量优于同类型其他算法的宽带语音编解码器。

G.718 is the latest broadband embedded variable bit-rate coding algorithm for speech and audio put forward by ITU-T, which provides state-of-the-art narrow-band and wideband speech quality at the same time.On the basis of analyzing its algorithm principle and key technology, combined with TMS320C55X series DSP platform and G.718 algorithm, the scheme of reasonable assembly implementation of G.718 standard compiled C code optimization.Complete assembly code on TMS320C5505EVM test and real-time implementation, the resuhs show that the output voice still maintained the voice quality.