| 摘要 |
<p>A frequency converting circuit serves to generate a clock signal of a video sampling frequency from one of a clock signal or a sync signal outputted from a digital audio interface. An oscillator serves to generate a clock signal of the video sampling frequency. A video reference generating circuit serves to generate a video timing signal, an audio timing signal, and black burst data from one of the clock signals generated by the frequency converting circuit and the oscillator, and from an output reference video signal. In cases where the recording audio data is recorded or edited, a first switching device replaces the recording video data by the black burst data, and feeds the black burst data to the video recording processing circuit. In these cases, a second switching device replaces the video-sampling-frequency clock signal from the oscillator by the video-sampling-frequency clock signal from the frequency converting circuit, and feeds the video-sampling-frequency clock signal from the frequency converting circuit to the video reference generating circuit. In addition, a third switching device suspends detection of an output reference fed to the video reference generating circuit, and inhibits a timing reset of the video reference generating circuit. <IMAGE></p> |
