【摘要】 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。更多还原

【Abstract】 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 TMS320C55 X 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 TMS320C5505 EVM test and real- time implementation,the results show that the output voice still maintained the voice quality.更多还原