| 摘要 |
<p>A PAL system demodulator capable of delivering high quality color signals even in the cases of poor vertical correlation comprising; 1H delay line 1 delaying the chroma signal by one horizontal period, 1H delay-line 2 delaying a reference signal by one horizontal period wherein the output of said 1H delay line 1 is defined as said reference signal, color demodulating circuit 3 canceling hue error by conducting an operation between the scanning lines covering from the input and the output of said 1H delay line 1, color demodulating circuit 4 canceling the hue error by conducting an operation between the canning lines covering from the input and the output of said 1H delay line 2, vertical correlation detecting circuit 5 detecting the vertical correlation between the chroma signal of said reference signal and the chroma signal of the adjoining line or the chroma signal of the adjoining line separated by one-line, and selector 6 selecting the output of said color demodulating circuit 3 or the output of color demodulating circuit 4. <IMAGE></p> |
