智能小区系统中嵌入式音频全双工传输的实现  

The Implementation of Embedded Full Duplex Audio Transmission System for Intelligent Housing Estates

作　　者：张良[1] 吴小强[1] 罗代升[1] 

机构地区：[1]四川大学电子信息学院图像信息研究所,成都610064

出　　处：《计算机工程与应用》2005年第36期101-104,共4页Computer Engineering and Applications

基　　金：深圳DIGITONE公司资助的应用研究项目(编号:四川大学科技合同(横)字第04H700号)

摘　　要：文章介绍了一种基于国产嵌入式CPU———方舟(ARCA)实现的嵌入式智能小区系统。分析了以嵌入式方式实现智能小区系统的硬件组成,设计实现了该系统的全双工实时语音对讲软件系统。提出了基于G.729的编解码方法,和双队列的缓冲技术。实验表明,该系统语音传输质量较高,时延可以忽略不计。In this paper,an accomplishment of an intelligent housing estate system is introduced based on national embedded CPU ——ARCA.The hardware of the system constructed using embedding technology is analyzed.The software design and implementation of the full duplex real time audio communication system are presented.An encoding and decoding method based on G.729A and a dual buffers dual sockets technology are proposed.Experiments show that the audio transmission quality of the system is quite high and the time delay can be ignored.

关 键 词：智能小区 嵌入式系统 LINUX G.729 POSIX 

分 类 号：TP18[自动化与计算机技术—控制理论与控制工程]