Systems and methods for low latency media defect detection
US8139457B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 23, 2008 |
| Grant date | Mar 20, 2012 |
| Priority date | — |
| Expiry date | May 31, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2220/2516
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Various embodiments of the present invention provide systems and methods for media defect detection. For example, a media defect detection systems is disclosed that includes a data input derived from a medium, a fast envelope calculation circuit that receives the data input and provides a fast decay envelope value based on the data input, a slow envelope calculation circuit that receives the data input and provides a slow decay envelope value based on the data input, and a media defect detection circuit. The media defect detection circuit receives the slow decay envelope value and the fast decay envelope value, calculates a ratio value of the fast decay envelope value to the slow decay envelope value, and asserts a defect output based at least in part on the comparison of the ratio value to a defect threshold value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.