Disc-shaped recording medium disc driving device and method and apparatus for producing disc
US7123557B2 · kind B2 · utility
12Cited by
3References
31Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Oct 10, 2002 |
| Grant date | Oct 17, 2006 |
| Priority date | — |
| Expiry date | Aug 26, 2024 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2220/2541
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The information such as address is to be efficiently formed into wobble components and further the S/N ratio in reproducing the information formed into the wobble components is to be improved. In an optical disc of the present invention, there are recorded in a wobble the address information modulated in accordance with the MSK (minimum shift keying) system and the address information modulated in accordance with a modulation system in which even harmonics signals are added to a sinusoidal carrier signal and in which the polarity of the harmonics signal is changed depending on the sign of the data for modulation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.