Write data write-pre-compensation system in a floppy disk drive unit and apparatus therefor
US5187614A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 20, 1990 |
| Grant date | Feb 16, 1993 |
| Priority date | — |
| Expiry date | Dec 20, 2010 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B20/1816
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.