Write data write-pre-compensation system in a floppy disk drive

Details Write data write-pre-compensation system in a floppy disk drive Write data write-pre-compensation system in a floppy disk drive

1990-12-20

1993-02-16

Canney, Vincent P.

Dynamic magnetic information storage or retrieval

General processing of a digital signal

Pulse crowding correction

G11B 509

Patent

active

051876140

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.

REFERENCES:
patent: 3067422 (1962-12-01), Hunt
patent: 3503059 (1970-03-01), Ambrico
patent: 4000513 (1976-12-01), Precourt
patent: 4334250 (1982-06-01), Theus

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