| 摘要 |
Disclosed is a video signal processing apparatus which adequately calibrates a gain for each of plural types of input video signals. In calibration mode, a reference signal corresponding to each of plural types of input video information is supplied in place of an input video signal, and the variable gains of demodulation signal paths to a demodulation stage are updated in such a way that the detection level of a demodulated output signal obtained for each demodulation signal path at the time of signal supply falls within a target range, the acquired updated values are respectively stored for the associated input video signals. In normal demodulation mode, the gain with the latest updated value is used.
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