INTEGRATED TELEVISION AND VIDEO CASSETTE RECORDER SYSTEM

摘要

A system for processing both a composite video television (TV) signal and a video cassette recorder (VCR) playback signal containing a combined noise canceller and comb filter (108) sharing a single delay line (1H DL) and a 3.58 MHz oscillator (424) that drives a quadrature demodulator (424, 454, 456, 458, 460, 462 and 464) for demodulating both playback chrominance signals extracted from the playback signal and TV chrominance signals extracted from the TV signal. The system also provides automatic gain control to both the composite video TV signal and the VCR playback signal.