基于单DSP的VoIP模拟电话适配器研究与实现  

Research and Implementation of VoIP ATA Based on Single DSP

作　　者：朱晓东[1] 武蓓[1] 邓峰[2] 曾学文[2] 王劲林[2] 

机构地区：[1]中国科学院研究生院,北京100039 [2]中国科学院声学所DSP中心,北京100080

出　　处：《计算机工程》2007年第5期220-222,共3页Computer Engineering

基　　金：国家"863"计划基金资助项目(2005AA103320)

摘　　要：提出和实现了一种新颖的基于单个通用数字信号处理器(DSP)的VoIP模拟电话适配器方案。DSP的I/O和存储资源非常有限,通常适于运算密集型应用,不适宜控制密集型应用[5]。该系统高效利用单DSP的I/O和片内外存储器资源,采用μC/OS-II嵌入式实时操作系统,支持SIP和TCP-UDP/IP协议,通过LAN或者宽带接入,使普通电话机成为Internet终端,实现IP电话。该系统软硬件结构紧凑高效,运行稳定,成本低,具有广阔的应用前景。This paper presents a VoIP ATA solution based on a single digital signal processor （DSP）. DSPs are suitable for arithmetic-intensive application and unsuitable for control-intensive application because of the limitation of I/O and memory resources. This solution is based on a 16-bit fixed-point DSP and μC/OS-II embedded real-time operating system. It makes good use of the limited resources, supports SIP and TCP-UDP/IP protocol. It can connect the analog telephone to Internet and realize the VolP application. This system has a great future for its high efficiency and low cost.

关 键 词：模拟电话适配器 IP电话 数字信号处理器μC/OS—Ⅱ 

分 类 号：TN915.1[电子电信—通信与信息系统]