Digital data separator

Details Digital data separator Digital data separator

1986-09-23

1988-05-10

Canney, Vincent P.

Dynamic magnetic information storage or retrieval

General processing of a digital signal

Pulse crowding correction

G11B 509

Patent

active

047439823

ABSTRACT:
A digital data separator for use with apparatus for recovering binary information recorded on a movable media in frequency modulation (FM) or modified frequency modulation (MFM) comprises a measurement unit which for each read pulse received as an input provides a code representing the actual duration of an interval N between read pulse n and the preceding read pulse n-1 and a speed error correction unit which corrects an actual interval duration relative to the speed error of the movable media. The separator further includes a peak-shift recovery unit which provides as an output, nominal duration information related to interval N based on the corrected interval duration and on the peak-shift of pulse n-1, determined by taking into account the corrected duration of an interval N-1, a preceding interval N, and the nominal duration of intervals N-1 and N-2 preceding interval N.

REFERENCES:
patent: 4672482 (1987-06-01), Troletti

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