Digital magnetic recording and reproducing apparatus

Details Digital magnetic recording and reproducing apparatus Digital magnetic recording and reproducing apparatus

1979-03-12

1980-11-18

Canney, Vincent P.

Dynamic magnetic information storage or retrieval

General processing of a digital signal

In specific code or form

360 40, G11B 509

Patent

active

042348986

ABSTRACT:
In a digital magnetic recording and reproducing apparatus, a digital code signal to be recorded is given a code conversion by means of modulo-2-adding another digital signal thereto to prevent a continuation of the same binary signal levels for a prolonged period. The signal level of the reproduced digital code signal is corrected by level comparison with a threshold level provided by applying the above reproduced digital code signal to a compensator and peak rectifiers, which have the same time-constant, and then the reproduced digital code signal is given another code conversion by means of modulo-2-adding still another digital signal provided for restoring the code conversion, so that it is possible to reproduce the original digital code signal faithfully.

REFERENCES:
patent: 4017903 (1977-04-01), Chu
patent: 4027335 (1977-05-01), Miller

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