摘要
为了降低数字对讲机的成本,以8051作为中央处理器,采用语音编解码芯片AMBE2000和数字PMR处理器CMX7141,设计了一款遵从dPMR446标准,面向低端市场的数字对讲机基带系统。实验结果表明,该系统实现了数字通话,具有语音清晰、可靠性高、成本低等特点。
A low - end baseband system of digital interphone conforming to dPMR446 standard is introduced in the paper. Vocoder chip AMBE2000 and digital PMR processor CMXT141 are adopted in the design, and 8051 works as the microcon- troller in order to reduce cost. Experiment results show that the system realizes digital conversation, and provides clear voice service with high reliability at a low cost.
出处
《电声技术》
2012年第3期32-35,59,共5页
Audio Engineering
