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。
关键词:
模拟电话适配器,
IP电话,
数字信号处理器,
μC/OS-II
Abstract: 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 VoIP application. This system has a great future for its high efficiency and low cost.
Key words:
Analog telephone adapter (ATA),
Voice over Internet protocol (VoIP),
Digital signal processor (DSP),
μC/OS-II
朱晓东;武 蓓;邓 峰;曾学文;王劲林. 基于单DSP的VoIP模拟电话适配器研究与实现[J]. 计算机工程, 2007, 33(05): 220-222.
ZHU Xiaodong; WU Bei; DENG Feng; ZENG Xuewen; WANG Jinlin. Research and Implementation of VoIP ATA Based on Single DSP[J]. Computer Engineering, 2007, 33(05): 220-222.