Optical recording and reproducing methods for optical disk
US6487149B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 7, 1999 |
| Grant date | Nov 26, 2002 |
| Priority date | — |
| Expiry date | Oct 7, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B7/0906
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An optical recording method for an optical disk having a disk surface portion in which prepits, indicative of preformat information, are formed. In the optical recording method, a portion of a data signal which matches one of the prepits and corresponds to a write mark radially adjacent to one of the prepits is detected. Marks are recorded along a track of the disk by selectively using one of an optimal recording power and a proper recording power level, in accordance with the non-match portion or the match portion of the data signal. A radial width of the marks recorded in accordance with the match portion of the data signal is smaller than a radial width of the marks recorded in accordance with the non-match portion of the data signal. An optical reproducing method is adapted to accurately detect a wobble signal and a prepit signal from the optical disk to which data is recorded by the above optical recording method. Further, a wobble/prepit detection method for optical recording and reproduction is adapted to accurately detect the wobble signal and the prepit signal from the optical disk.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.