摘要：

提出并实现一种基于通用分组无线业务网络的无线IP语音通信系统。该系统结合S3C2410处理器的低成本、高性能与嵌入式 Linux软件系统高可靠性等优点，采用独特的双缓冲四线程语音数据处理方法和延迟可控技术，使实时语音播放更加平滑，并将总体时延控制在可接受范围内。性能分析结果表明，模块化的系统设计方法使该系统只需更换通信模块即可接入3G网络。

关键词: IP语音, G.729A算法, 双缓冲, 实时传输, 通用分组无线业务

Abstract:

This paper presents and realizes an IP voice system, which combines the S3C2410 processor’s low-cost, high performance features with embedded Linux software system’s high reliability advantages. It uses a unique way called four-threaded double-buffered voice data processing and delay-control playback technology to make real-time voice playback smoother, and time delay is controlled within an acceptable range. Performance analysis shows that the modular system design makes the system easier to access 3G networks by only replacing the communication module.

Key words: IP voice, G.729A algorithm, double-buffer, real-time transmission, General Packet Radio Service(GPRS)

中图分类号: 

• TP393