摘要
分析了矿用IP广播对讲系统的回声产生路径,指出其回声具有来源复杂、路径延迟时间长、路径延迟抖动大的特点;提出在广播主机采用软件算法消除回声,在广播终端采用结构设计和硬件电路设计相结合的方法消除回声的方案。实际应用表明,该回声消除方案有效地提高了矿用IP广播对讲系统的通信质量,系统全双工扩音对讲通话效果良好。
The paper analyzed echo path of mine-used IP broadcast and talkback system, pointed out that the echo has complex sources, long path delay and large path delay jitter. It proposed a scheme of using software algorithm to eliminate echo in radio host, and using combination of structure design and hardware design to eliminate echo in broadcasting terminal. The practical application shows that the scheme of echo cancellation improves communication quality of mine-used IP broadcast and talkback system, and full-duplex loud-speak and talkback of the system has good effect.
出处
《工矿自动化》
北大核心
2013年第3期17-19,共3页
Journal Of Mine Automation
基金
科技部院所技术开发专项基金项目(2011EG122201)
天地(常州)自动化股份有限公司科研项目(11SY008)
关键词
煤矿通信
IP广播
扩音系统
对讲系统
回声消除
coal mine communication
IP broadcast
loud-speak system
talkback system
echocancellation
