针对无线语音通信的G.729算法的改进及DSP实现  

Improvement and DSP Implementation of G.729 Algorithm for Wireless Voice Communication

作　　者：熊堃[1] 陈向东[1] 葛林[1] 石念[1] 

机构地区：[1]西南交通大学信息科学与技术学院,四川成都610031

出　　处：《通信技术》2010年第6期219-220,223,共3页Communications Technology

基　　金：教育部新世纪优秀人才支持计划支持项目(编号:A0160419950120)

摘　　要：无线语音通信系统中,由于开放空间的信道衰落特性,使得语音信号在空间传输中受到较大的干扰。针对这一特点,提出了一种基于G.729协议的优化算法。该优化算法粗化了码本搜索,并通过定点溢出保护的去除和宏定义的使用改进了程序运行效率,和原算法相比有较低的计算复杂度和处理延时,利于无线语音的传输。通过DSP硬件仿真实验和人耳听觉辨别表明,在计算复杂度大幅下降的情况下,合成话音质量仍能达到令人满意的效果。In wireless voice communication systems,for the fading characteristics in the open area,the transmission of voice signals in the space receives much disturbance.Aiming at the characteristics of wireless voice communication system,an improved algorithm based on G.729 voice coding is proposed in this paper.This algorithm simplifies the codebook searching and improves the efficiency of the program.As compared with the original algorithm,this algrithm is low in computational complexity and processing delay,thus suitable for wireless voice transmission.The DSP hardware simulation and the human auditory indicate that the quality of synthetic voice could achieve ideal result while the computational complexity declines substantially.

关 键 词：语音编码 G.729语音编码 无线语音通信系统 

分 类 号：TN912.3[电子电信—通信与信息系统]