Systems and methods for enhanced media defect detection
US8219892B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 6, 2009 |
| Grant date | Jul 10, 2012 |
| Priority date | — |
| Expiry date | May 11, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M13/3905
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Various embodiments of the present invention provide systems and methods for detecting storage medium defects. As one example, a media defect detection system is disclosed that includes a data detector circuit that applies a detection algorithm to the data input and provides a hard output and a soft output. A first circuit combines a first derivative of the hard output with a derivative of the data input to yield a first combined signal. A second circuit combines a second derivative of the hard output with a derivative of the first combined signal to yield a second combined signal. A third circuit combines a derivative of the soft output with the second combined signal and a threshold value to yield a defect signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.