Method and apparatus for data error recovery using defect threshold detector and viterbi gain
US6657803B1 · kind B1 · utility
105Cited by
27References
16Claims
0Family size
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Key dates
| Filing date | Nov 21, 2000 |
| Grant date | Dec 2, 2003 |
| Priority date | — |
| Expiry date | Dec 14, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2020/183
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method and apparatus are provided for reading from a storage medium to form data values. A signal is generated from a sector on the storage medium and a section of that signal is identified as having a change in amplitude. A gain multiplier is activated to multiply that section of the signal by a gain value. The gain multiplier is deactivated at the end of the section so that the remaining portion of the sector signal is not multiplied by the gain value. This results in a defect adjusted signal that is applied to a detector to detect data values.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.