Apparatus and method for verification of data established on a record carrier during write
US5142514A · kind A · utility
6Cited by
1References
23Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 27, 1989 |
| Grant date | Aug 25, 1992 |
| Priority date | — |
| Expiry date | Oct 27, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B7/004
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The present invention provide an apparatus and method for verifying that a record carrier has been transformed from a first state to a second state in accordance with the state of a binary information signal being recorded thereon. In operation, the apparatus detects the signal generated by the record carrier during the supposed transformation and compares this signal to the corresponding portion of the binary information signal to determine whether or not the transformation has taken place, i.e., verifies the transformation. The present invention, in one embodiment, is employed in an optical disk system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.