Circuit arrangement for a color image recording and reproduction

Details Circuit arrangement for a color image recording and reproduction Circuit arrangement for a color image recording and reproduction

1986-07-17

1988-05-17

McElheny, Jr., Donald

Facsimile and static presentation processing

Facsimile

Recording apparatus

358 24, H04N 980, H04N 966

Patent

active

047454938

ABSTRACT:
A circuit arrangement for a color image recording and reproduction instrument(video recorder) or a color television receiver. Such devices have a phase regulation circuit in which an oscillator (18, 59) is controlled in accordance with the phase comparison between the color synchronization signal and a reference signal performed in a phase comparator circuit (9, 40). A control signal from the phase comparator circuit is applied to at least two scanning and locking units (12, 13; 49 to 52) which can be changed over successively and cyclically. These units scan the control signal during the color synchronization blanking time. The output signals of the scanning and locking units (12, 13; 49 to 52) are applied to an adder (16, 54) coupled to the oscillator (18, 59). The interference signals arising from the PAL changeover and superimposed on the control signal are thus eliminated.

REFERENCES:
patent: 3996605 (1976-12-01), Coffey
patent: 4376291 (1983-03-01), Heitmann
patent: 4477839 (1984-10-01), Sugiyama
patent: 4480265 (1984-10-01), Spiero
patent: 4555734 (1985-11-01), Fukui
patent: 4636836 (1987-01-01), Steckler et al.
patent: 4644388 (1987-02-01), Douziech et al.

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