一种话音控发技术的研究和设计

Research and design of a voice control transmitting technology

该设计基于对数检波电路,信号保持电路和比较判决电路等技术,来完成对半双工通信设备的人声自动控发和通信电路保持。该对数检波电路针对人声进行信号识别和检测,从而实现人声的自动控发。在信号保持电路中,通信激活开启时间约50ms,信号保持时间约3s,可以有效避免由于说话停顿造成的通信中断和话音丢字的现象。比较判决电路中对检测的信号电平值和基准电平进行比较,对达到基准电平值的人声信号进行判决后控发PTT。

Based on logarithmic detecting circuit,signal holding circuit and comparing decision circuit,this design realizes automatic voice control transmitting and communication holding circuit for half-duplex communication equipment.Aiming at the identification and test of voice signal,this logarithmic detecting circuit can automatically control and transmit voice signals.In the signal holding time,the time for activating and opening is about 50ms,while the time for signal holding is about 3 seconds,which effectively avoids communication interrupt and voice dropouts due to pauses in speaking.The comparing decision circuit will control and transmit PTT when the voice signal level equals to the reference level.