Optical disk recording device and optical disk recording method
US8861323B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 16, 2013 |
| Grant date | Oct 14, 2014 |
| Priority date | — |
| Expiry date | Apr 16, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2220/2537
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The present invention optimizes recording power based on correct β value. Whether an average of modulation values between the 2-4th AUNs is equal to or less than 65% of an average of modulation values between the 5-7th AUNs or not is judged. Otherwise, the gradual emission is performed, the β value is measured, and then the following requirement is judged:(average of β values between 5-7th AUNs)−(average of β values between 2-4th AUNs)≧0.18If each requirement is satisfied, track shift is judged to occur. The recording area of high output is compared with the recording area of lower output to judge whether or not magnitude relation matches the correct magnitude relation. Also, whether the difference between the β value of high output and the β value of lower output is equal to or more than the predetermined value (0.18) or not is judged.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.