Magnetic recording apparatus with recording of first and second

Details Magnetic recording apparatus with recording of first and second Magnetic recording apparatus with recording of first and second

1985-07-03

1987-06-09

Richardson, Robert L.

Facsimile and static presentation processing

Facsimile

Recording apparatus

358328, 358343, 360 191, H04N 578

Patent

active

046724680

ABSTRACT:
A VTR is furnished with a phase-locked loop whose reference input is a color signal subcarrier. The phase-locked loop fixes two sound FM carrier frequencies in constant relationships with the frequency of the color signal subcarrier, thereby to stabilize the carrier frequencies. The two sound FM carrier frequencies are respectively selected to be integral times of f.sub.H /2 (where f.sub.H denotes the frequency of a horizontal synchronizing signal). The frequencies of the beats between both the sound carrier are fixed to integral times of f.sub.H /2, with the result that the degradation of a reproduced picture attributed to the beats is prevented.

REFERENCES:
patent: 4580174 (1986-04-01), Tokunaka

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