Digital data separator
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United States of America Patent
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-
May 10, 1988
Grant Date -
N/A
app pub date -
Sep 23, 1986
filing date -
Oct 10, 1985
priority date (Note) -
Expired
status (Latency Note)
Importance
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.
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