| 摘要 |
PURPOSE:To improve a reproduced image quality, by providing a prevalue holding circuit for a luminance signal system after the Y/C in the video signal is separated. CONSTITUTION:An input FM signal 1 is demodulated at an FM demodulation circuit 2, a video signal A including dropout is inputted to a color signal rejecting circuit 4 consisting of comb-type filters and it becomes a signal B only with the luminance signal. Further, a color signal before frequency conversion is present in the dropout section, and when this signal is inputted to a prevalue holding circuit 3, it is held with a DC voltage immediately before the dropout to become a signal C in which the color signal before remaining conversion of the dropout section is rejected. Further, the signal A becomes the color signal E subjected frequency conversion, via a luminance signal rejection circuit 5 and a color signal frequency conversion circuit 6, consisting of comb-type filters. Further, the signals C and E are added at an addition circuit 7 to obtain a video signal 8 after compensation. |
