Write data write-pre-compensation system in a floppy disk drive unit and apparatus therefor
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United States of America Patent
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-
Feb 16, 1993
Grant Date -
N/A
app pub date -
Dec 20, 1990
filing date -
Dec 28, 1989
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A write data compensation system compensates original write data which is recorded on recording disc mediums, the original write data to eventually be reproduced using a disc drive apparatus capable of reproducing data from recording media having differing recording densities. In the event that the write data is to be recorded on a low density recording media, the original write data is corrected by displacing each bit for which a bit shift is estimated to occur during reproduction in a direction coincident with a direction of the estimated bit shift. In the event that the write data is to be recorded on a higher density recording media, the original write data is corrected by displacing each bit for which a bit shift is estimated to occur in a direction opposing the direction of the estimated bit shift.
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