Optical disc for tuple-speed recording and optical disc device for tuple-speed recording
US8391113B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Feb 13, 2009 |
| Grant date | Mar 5, 2013 |
| Priority date | — |
| Expiry date | Jun 2, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2220/2579
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An optical disc has a read-only system lead-in area and a recordable data area. Disc boundary information representing a boundary in a radial direction of an area on which capability of recording at a predetermined recording speed is guaranteed is recorded on the system lead-in area while being related to each tuple speed. An optical disc device, upon user's instruction of tuple-speed recording, compares the boundary information related to the instructed tuple speed with a present recording position, performs recording at the instructed tuple speed if the present recording position is on the outside of the boundary, and performs recording at a tuple speed lower than the instructed tuple speed if the present recording position is on the inside of the boundary.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.