Magnetic color video recording and reproducing system with color

Details Magnetic color video recording and reproducing system with color Magnetic color video recording and reproducing system with color

1978-07-03

1980-06-24

Konick, Bernard

Facsimile and static presentation processing

Static presentation processing

Attribute control

358 4, 358 26, H04N 5795

Patent

active

042098009

ABSTRACT:
A magnetic video recording and reproducing system in which a luminescence signal of a color television signal is frequency-modulated and a carrier chrominance signal is frequency-converted to a lower frequency side is disclosed, wherein during recording operation a burst signal of an input carrier chrominance signal is phase-compared with a signal from a variable frequency oscillator to produce an error signal which is used to control the variable frequency oscillator, and during playback operation a burst signal of a reproduced carrier chrominance signal is phase-compared with an output signal from a fixed frequency oscillator to produce an error signal which is used to control the variable frequency oscillator. During the recording operation, the burst signal of the input carrier chrominance signal and the signal from the variable frequency oscillator are applied as input to the detection circuit and during the playback operation the burst signal of the reproduced carrier chrominance signal and the signal from the fixed frequency oscillator are applied as inputs to the detecting circuit, to produce a phase-detected output which is used as a control signal for a color killer in order to assure a stable and reliable color killer operation with a low cost.

REFERENCES:
patent: 3697673 (1972-10-01), Dann
patent: 3772461 (1973-11-01), Horaguchi
patent: 3947871 (1976-03-01), Amari
patent: 3975759 (1976-08-01), Taniguchi

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