Dynamic magnetic information storage or retrieval – General processing of a digital signal – Data clocking
Patent
1975-03-21
1976-02-10
Canney, Vincent P.
Dynamic magnetic information storage or retrieval
General processing of a digital signal
Data clocking
360 28, G11B 509
Patent
active
039381846
ABSTRACT:
A digital flutter reduction system which corrects for a varying time base ror in FM recordings on magnetic tape. Pulse transitions from the outputs of a reference oscillator and a reference tone on a first tape track are compared by a flip-flop whose output is a pulse having a width corresponding to the time base error. The output pulse enables a first counter to provide a digital output which is loaded into a second counter. Pulse transitions from a second tape track containing recorded data advance the second counter over a number of counts indicative of a correction factor. The pulse transitions of the recorded data are delayed in accordance with the correction factor thereby reducing the time base error.
REFERENCES:
patent: 3483540 (1969-12-01), Damron
patent: 3725609 (1973-04-01), Leboury
DeFrancesco Richard E.
Harris Bernard
Hoffman David
Canney Vincent P.
Hansen Henry
Iseman W. J.
Sciascia R. S.
The United States of America as represented by the Secretary of
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