针对煤矿井下广播系统多采用模拟音频广播方式,存在传输距离短、抗干扰能力差、需要单独布线和只能进行全网语音广播等缺点,提出了一种新型矿用数字广播系统的设计方案,详细介绍了该系统的架构、主要功能、软硬件设计.该系统基于计算机技术、网络技术、音频流技术,将实时采集的广播信号量化、编码、压缩、缓存,按照网络传输协议以IP数据包形式分包传输到网络广播终端并进行播放,解决了传统模拟音频广播的不足.实验室测试及运行结果表明,该系统稳定、可靠,音、视频播放流畅,操作简单,能够满足煤矿现场的实际需要.%To solve shortcomings that coal mine underground broadcasting system has short transmission distance, bad anti-interference ability, need separate wiring and only makes whole network voice broadcasing because it uses analog audio broadcasting way, the paper put forward a design scheme of new kind of mine-used digital broadcasting system. It introduced structure, main function, software and hardware design of the system in details. The system adopts computer technology, network technology and audio stream technology, which will make collected real-time radio signal quantization, coding, compression, cache, and transmit to Internet radio terminals by IP packets and broadcast according to the network transmission agreement. The system solves shortages of traditional analog audio broadcast. The laboratory test and operation results showed that the system is stable and reliable, sound and video playback is fluent, operation is simple, which can meet with mine actual needs.
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