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中文摘要：
针对目前煤矿井下模拟扩音电话系统抗干扰能力弱,传输距离短、功耗高、难以和井下通信系统融合等问题提出了低比特率数字扩音电话系统的设计方案。系统基于AMBE压缩编码算法,使用AMBE-1000语音编码解码芯片,以C8051F310为控制核心。详细介绍了关键模块的硬件电路、软件流程图及工作原理。应用结果表明,该系统稳定、可靠、传输距离远,满足了煤矿井下环境的要求。
英文摘要：
The analog broadcast telephone system in coal mine has some problems of weak abilities of anti-disturbance,short transmission distance,high power dissipation and connection with mine communications system difficultly.Aiming at these problems,the design of low bit rate digital broadcast telephone system is presented.This system uses the AMBE-1000 vocoder chip based on the AMBE compression algorithm,and uses C8051F310 as the main microprocessor.The key hardware circuit,the software flowchart and working principle are introduced in detail.The application in practice show that this system is stable,reliable and the signal can be transmitted as far as we expected,so it meets the requirement of the coal mine environment.
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