Facsimile and static presentation processing – Facsimile – Recording apparatus
Patent
1982-12-08
1985-01-08
Masinick, Michael A.
Facsimile and static presentation processing
Facsimile
Recording apparatus
358343, H04N 9491
Patent
active
044929862
ABSTRACT:
A video and audio signal recording apparatus includes frequency-modulators in which an audio signal, for example, a stereophonic left signal, modulates first and second carriers with different frequencies so as to provide first and second FM audio signals, respectively, a first mixing circuit for mixing the first FM audio signal with a video signal, such as, a composite color video signal having a frequency modulated luminance component signal in a frequency band separated from the band of a frequency-converted chrominance component signal so as to provide an interval therebetween for accommodating the FM audio signals, a second mixing circuit for mixing the second FM audio signal with the video signal, first and second magnetic heads respectively receiving first and second mixed audio and video signals from the first and second mixing circuits, respectively, for recording in respective record tracks which are adjacent each other on a magnetic record medium, the heads and record medium having a magnetic characteristic which varies with the frequency of the signal being recorded, and the levels of the FM audio signals in the first and second mixed signals being substantially less than the levels of the FM luminance and frequency converted chrominance signal and different from each other in the sense to compensate for the magnetic characteristic which varies with frequency. The levels of the FM audio signals in the first and second mixed audio and video signals are desirably varied upon changes in the level of the audio signal to be recorded.
REFERENCES:
patent: 3830968 (1974-08-01), Redlich
patent: 4007482 (1977-02-01), Amari
patent: 4007484 (1977-02-01), Amari
patent: 4208671 (1980-06-01), Ozawa
patent: 4353090 (1982-10-01), Broadbent
patent: 4453186 (1984-06-01), Watatani
Kamai Toshimitsu
Kono Takashi
Minegishi Akira
Eslinger Lewis H.
Masinick Michael A.
Sinderbrand Alvin
Sony Corporation
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