【摘要】 语音压缩是现代多媒体通信中实现低速率语音通信的关键技术。1996年,ITU-T公布了G.729标准。它采用了共轭结构代数码本激励线性预测(CS-ACELP)算法,其编码速率为8kbit/s,延时为15ms,具有良好的合成语音质量和适中的复杂度等优点。在个人移动通信、多媒体通信、IP电话、卫星通信及未来的综合业务数字通信(ISDN)等领域具有广泛的应用前景。本文综述了ITU-TG.729协议在DSP上实现的代码优化方法。更多还原

【Abstract】 Speech compression is the key technology to realize the low speed speech communication. In 1996,ITU-T issued the G.729 Recommendation. It is used for coding at 8kb/s speed by Conjugate-Structure Algebraic-Coder-Excited Linear-Prediction(CS-ACELP)algorithm,which has a 15ms delay. It has nicer synthesized speech quality and appropriate complexity. It can be widely used in the field of individual mobile communication,multimedia communication,I Pphone,satellite communication,ISDN and so on. The author introduces the optimal implementation methods of G.729 on DSP.更多还原