| 摘要 |
a gamma compensator and line delay means (4) which outputs the luminance signal of an object after compensating and delaying the luminance signal one line (1H); a micom (6) which compares the auto gain control voltage with the establishment critical voltage; a switching means (7) which is switched by the control signal of the micom (6); a black level clip and gain control means (8) which clips the noise and controls the gain; a video selection means (9) which outputs the luminance signal which is delayed a line and the luminance signal which is clipped through an encoder (5).
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