| 摘要 |
<p>CCD COMB FILTER AND DEMODULATION SYSTEM . A CCD comb filter and color demodulation system is described for use in a color television receiver. The system includes a CCD comb filter receiving a video signal having interleaved luminance and color components, the latter components including a color subcarrier at a nominal frequency. Preferably, the comb filter includes but two CCD devices which receive the input video signal and apply their sampled outputs to a summer to develop combed luminance components and combed color components which occupy different frequency bands. The combed color components include a color subcarrier and sidebands which are translated upward in frequency by a given multiple of the nominal subcarrier frequency. The latter components are applied to a pair of CCD output filters which are clocked to sample the color components at the given multiple of the nominal subcarrier frequency for developing baseband demodulated color signals. The preferred embodiment also provides on-chip vertical peaking of the combed luminance components.</p> |
