System of fast reproduction at non-integral multiple of normal p

Details System of fast reproduction at non-integral multiple of normal p System of fast reproduction at non-integral multiple of normal p

1989-08-18

1990-07-24

Canney, Vincent P.

Dynamic magnetic information storage or retrieval

Recording for changing duration, frequency or redundant...

360 32, G11B 500, G11B 509

Patent

active

049438727

ABSTRACT:
A magnetic recording and reproducing device comprises a rotary head incorporating plural heads having different azimuths and recording and reproducing an input signal by tracing a magnetic tape and a tape feeding drive device for feeding the magnetic tape. The tape feeding drive device feeds the magnetic tape during multiple speed reproduction with a tape feeding speed of about (N+1/2) times (where N is an integer) as high as a tape feeding speed during a normal speed reproduction. Positional relation of head trace to the track thereby is shifted by 1/2 track in each trace with a result that a section in which information such as sub-code can be read and a section in which it cannot be read are dispersed on time axis. This enables the information to be obtained substantially in real time.

REFERENCES:
patent: 4307417 (1981-12-01), Tokuyama
patent: 4494153 (1985-01-01), Ravizza
patent: 4558376 (1985-12-01), Heitmann
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patent: 4686584 (1987-08-01), Kojima et al.
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patent: 4731659 (1988-03-01), Kani
patent: 4771345 (1988-09-01), Watanabe
patent: 4812924 (1989-03-01), Fukami et al.

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