数字对讲机中语音编码的研究与DSP实现  

Voice Codec Research and DSP Implementation in Digital Intercom

作　　者：熊堃[1] 陈向东[1] 葛林[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10期123-125,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(A0160419950120)

摘　　要：根据TDD数字对讲机的特点,以TMS320VC5509A为平台,结合微处理芯片MSP430和射频芯片CC1100,提出了一种数字对讲机系统的结构设计方案,该设备主要应用于抢险、救灾、野外作业等缺乏基础通信设施的环境。设计方案中,利用TMS320VC5509A实现无线语音通信中广泛采用的G.729A语音压缩编码,获得了较低的编码速率和较好的话音质量,在满足话音通信实时性要求的同时,提高了频谱的利用率。With TMS320VC5509A as the platform,and in integration of the micro-processing chip MSP430 and RF chip CC1100,a design of TDD digital intercom is proposed.This device is mainly used in emergency rescue,disaster relief,field work,and other environments in shortage of basic communication facilities.In this design,TMS320VC5509A is used to achieve G.729A voice compression coding,which is now widely applied in today＇s wireless voice communication,thus to obtain.The lower rates and better voice quality,and to raise the spectrum utilization while meet the real-time requirement of voice communications.

关 键 词：TDD数字对讲机 数字信号处理器 G.729A编解码 

分 类 号：TN912[电子电信—通信与信息系统]