| 摘要 |
The complex video signal is converted into a digital signal and is modulated, processed to Y, R-Y, B-Y signal in the picture in picture (PIP) control circuit. The PIP control circuit includes a lowpass filter (70) for extracting a brightness signal (Y) from a complex video signal, a band pass filter (80) for extracting a color (C) signal from the complex video signal, a demodulator (40) for demodulating the R-Y, B-Y signal from a color signal (C), a R-Y latch (50) for latching the R-Y signal generated by the demodulator (40), a B-Y latch (60) for latching a B-Y signal generated by the demodulator (60), a first register (10) for storing the complex video signal temperary, a second register (20) for storing the brightness signal (Y) generated by the low pass filter, and a third register (30) for storing the color signal (C) generated by the bandpass filter. |
