System and method for synchronization of rotary head magnetic re

Details System and method for synchronization of rotary head magnetic re System and method for synchronization of rotary head magnetic re

1983-04-06

1985-06-25

Canney, Vincent P.

Dynamic magnetic information storage or retrieval

General processing of a digital signal

Data clocking

G11B 509

Patent

active

045257540

ABSTRACT:
A timing error between consecutive tracks of reproduced data from a rotary scan recording/reproducing device is detected as a difference between a normal and actual occurrence of a synchronization signal. A correction signal is provided to reduce the timing error and it is stored, updated and utilized to offset a bit counter synchronous with the reproduced data in the absence of the synchronization signal. The effect of short term dynamic errors is reduced by accumulating occurrences of the timing error in the same direction and updating the stored correction signal only when a predetermined number of occurrences in one direction is obtained.

REFERENCES:
patent: 4425646 (1984-01-01), Kinoshira et al.

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