摘要
红外线音频信号发射系统,是以红外线作为载波光源,把声音调变在载波中,通过空气从发射端传送至接收端的过程。本系统采用调频的方式来做调变,它比振幅调变及相位调变的讯噪比高、失真度低、受环境干扰程度低,又比脉波码调变来的经济。发射光源选取红外光优点则在于不容易被其他电器干扰,保密性能好,无接线、不怕阻隔。
The infrared audio signal emission system is the process that takes infrared ray as the carrier wave light source,makes the voice modulate carrier wave,and transmits from the launch to the receiving end.Compared to amplitude modulation and phase modulation,the system uses the FM ways to do it,which has high signal-to-noise ratio,low distortion degree and environmental interference degree,and much economy than pulse code modulation.The advantage of selecting infrared emission source lies in strong anti-interference,good confidential performance,non-connection,and compatible barrier.
出处
《价值工程》
2011年第24期134-136,共3页
Value Engineering
关键词
红外线
信号发射
遥控接收
锁相环
infrared ray
signal emission
remote control receiving
phase-locked loop
