Magnetic recording apparatus and magnetic recording/reproducing

Details Magnetic recording apparatus and magnetic recording/reproducing Magnetic recording apparatus and magnetic recording/reproducing

1989-03-22

1991-06-25

Envall, Jr., Roy N.

Dynamic magnetic information storage or retrieval

Record editing

360131, 358328, 358341, H04N 5782

Patent

active

050272292

ABSTRACT:
There is provided a magnetic recording/reproduction apparatus adapted to record/reproduce a video signal, a digital signal, and a FM audio signal at the surface layer portion of the magnetic layer of a magnetic tape, the intermediate layer portion thereof, and the lower layer portion thereof, respectively. This apparatus is provided with on the recording side thereof, a first modulator for generating a frequency modulated audio signal, a first rotary head for recording the audio signal from the first modulator at a lower layer portion of the magnetic tape, a second modulator for generating a digital signal having undergone, a poly-phase differential phase shift modulation, an amplitude change elimination circuit such as a limiter for eliminating changes in the amplitude of the digital signal from the second modulator, a second rotary head for recording the digital signal from the second modulator at an intermediate layer portion thereof, a video signal processing circuit for processing a video signal, and a third rotary head for recording the video signal from the video signal processing circuit at a upper layer portion thereof. This apparatus is also provided on the reproduction side, with a circuit configuration corresponding to the above-mentioned circuit configuration on the recording side in order to satisfactorily reproduce the above-mentioned three kinds of recorded signals.

REFERENCES:
patent: 3925816 (1975-12-01), Kihara
patent: 4313140 (1982-01-01), Keidl
patent: 4901159 (1990-02-01), Hitotsumachi
patent: 4908809 (1990-03-01), Tadokoro et al.

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