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目前在广电系统内还没有能实现对音频信号进行快速监测的设备,以往的监测方法灵敏度太低,不能及时反映音频信号的状态。正常视频信号中的同步信号是连续的,通常视频信号的检测是通过检测同步信号来确定信号的有无,而音频信号不是连续的,经常会出现正常的停顿,停顿时间的长短是随机的,这就给自动监测带来了困难。目前音频检测采用的方法,是通过判断音频信号允许的最大停顿时间(电视伴音允许1分钟,广播允许30秒)来实现,若超过最大允许值就
At present in the radio and television system has not been able to achieve rapid monitoring of the audio signal equipment, the sensitivity of the previous monitoring method is too low, can not reflect the audio signal status. Normal video signal in the synchronization signal is continuous, usually video signal detection by detecting the synchronization signal to determine the presence or absence of the signal, and the audio signal is not continuous, often there will be normal pause, pause time is random, This gives automatic monitoring has brought difficulties. At present, the method of audio detection is implemented by judging the maximum allowable pause time of the audio signal (1 minute for the sound of a television and 30 seconds for broadcasting). If the maximum allowable value is exceeded