Patent ID: 8854541

Claim:
A video demodulation device configured to demodulate an RF signal resulting from analog modulation of a composite video, blanking, and sync signal (a CVBS signal) including a horizontal synchronizing signal, and to reproduce the CVBS signal by digital processing, the device comprising: a tuner configured to receive as input the RF signal resulting from analog modulation, and to output an analog IF signal; and a demodulator configured to receive as input the analog IF signal, and to demodulate the CVBS signal, wherein the demodulator includes an analog-to-digital converter configured to convert the analog IF signal into a digital IF signal, a luminance gain adjuster configured to perform gain adjustment of a luminance component included in the digital IF signal such that a maximum of the luminance component found within a predetermined period becomes equal to a predetermined reference value, and a synchronization corrector configured to receive as input a result of the gain adjustment, to correct a signal corresponding to a signaling period of the horizontal synchronizing signal, and to output the corrected signal as the CVBS signal, and the synchronization corrector outputs, as the CVBS signal, a composite signal comprising the luminance component and a color component included in the gain adjustment result when the composite signal is smaller than the reference value, or the reference value when the composite signal is equal to or greater than the reference value.