Apparatus for magnetically recording and/or reproducing digital

Details Apparatus for magnetically recording and/or reproducing digital Apparatus for magnetically recording and/or reproducing digital

1988-10-04

1991-01-29

Canney, Vincent P.

Dynamic magnetic information storage or retrieval

Recording or reproducing an information signal and a control...

G11B 502

Patent

active

049891022

ABSTRACT:
In an apparatus for magnetically recording and/or reproducing digital signals in a plurality of modes characterized by different respective formats, pilot signals having different frequencies are generated to identify the modes, respectively, and, during a recording operation in one of such modes, the respective pilot signal is mixed with the digital signal to be recorded for providing a resultant mixed signal which is recorded. Thereafter, during a reproducing operation of the apparatus, the pilot signal included in the reproduced mixed signal is detected for determining the format of the recorded signal on the basis of the frequency of the detected pilot signal, whereupon the respective mode of the apparatus is established.

REFERENCES:
patent: 4445151 (1984-04-01), Kinoshire et al.
patent: 4656533 (1987-04-01), Sakai et al.
patent: 4819042 (1989-04-01), Richards

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