内容对比系统在广播台站音频监测中的应用

The Application of Content Comparison System in Audio Monitoring of Broadcasting Station

传统的音频监测方法一般包括人工监测或功率检测,工作量较大,效率较低,漏警率高。当被监测信号只是出现内容异常,而未明显衰减或中断时,传统监测方法将失效,因为异常信号的功率没有发生明显变化。本系统对比的是信号内容,任何异常情况都会改变信号的内容,只要两路信号中的一路发生异常,就会影响两路信号的相关性,系统就会报警。

Traditional audio monitoring methods generally include manual monitoring or power detection,which has a large workload,low efficiency,and a high rate of missed alarms.When the monitored signal is only abnormal in content without obvious attenuation or interruption,the traditional monitoring method will fail because the power of the abnormal signal has not changed significantly.This system compares the signal content.Any abnormal situation will change the signal content.As long as one of the two signals is abnormal,the correlation of the two signals will be affected,and the system wil l alarm.