Dynamic magnetic information storage or retrieval – Record editing
Patent
1990-01-26
1991-11-05
Envall, Jr., Roy N.
Dynamic magnetic information storage or retrieval
Record editing
360 66, 358335, 358341, 358343, H04N 5782
Patent
active
050634526
ABSTRACT:
A magnetic recording apparatus comprising an audio signal processing circuit for converting an input analog audio signal into a digital audio signal; a modulating circuit for subjecting the digital audio signal to a modulation selected from a multi-phase differential phase shift keying modulation (DPSK) or an offset-multi-phase differential shift keying modulation (ODPSK) to produce a modulated digital audio signal; an adding circuit for adding a high-frequency bias signal to the modulated digital audio signal; an audio signal recording unit for recording the modulated digital audio signal with the high-frequency bias signal added thereto on a track formed in a deep layer portion of a magnetic layer of a magnetic tape; and a video signal recording circuit for recording an input video signal on a video track formed in a surface layer portion of the magnetic layer of the magnetic tape.
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Envall Jr. Roy N.
Meller Michael N.
Nguyen Huy
Victor Company of Japan Ltd.
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