Drop-out responsive magnetic recording and reproducing system

Details Drop-out responsive magnetic recording and reproducing system Drop-out responsive magnetic recording and reproducing system

1977-10-17

1979-01-30

Martin, John C.

Facsimile and static presentation processing

Static presentation processing

Attribute control

H04N 576

Patent

active

041375475

ABSTRACT:
A magnetic recording and reproducing system which separates a brightness signal and a carrier color signal from a color television signal, frequency modulates the brightness signal and converts the carrier color signal to a lower frequency, records the modulated brightness signal and the low frequency carrier color signal in different manner for each horizontal scan line such that phases of the carrier are different between adjacent record tracks, and plays back the recorded signal through a comb filter to eliminate crosstalk from adjacent tracks in the carrier color signal. In this system, a horizontal synch. signal is eliminated in response to the detection of dropouts so as to prevent the disturbance of AFC and APC loops by dropouts, which would otherwise create color irregularity, and the horizontal synch. signal free of noise due to dropouts is used to activate the AFC and APC loops.

REFERENCES:
patent: 4012774 (1977-03-01), Kuniyoshi et al.

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