| 摘要 |
<p>There is provided a filter device which separates a colour signal and a luminance signal from a video signal on the basis of correlation among video signals on adjacent scanning lines. The device comprises delay sections (18 and 24) for sequentially delaying the video signal and sequentially producing a first and a second delay signals, a first judgement section (50) for judging the correlation between the video signal and the second delay signal, a second judgement section (64) for judging the correlation between the first delay signal and each of the video signal and the second delay signal when the first judgement section (50) judges to be correlative. The device further comprises compensating sections (66 and 68) for compensating amplitude of the separated colour signal when the second judgement section (64) judges to be not correlative and a subtraction section (16) for subtracting the compensated colour signal from the first delay signal to obtain the luminance signal, thus to compensate amplitude distortion produced to the separated colour and luminance signals when the video signal and the second delay signal are correlative with each other, while these signals and the first delay signal are not correlative with each other.</p> |
