Method and apparatus for determining type of digital versatile disc
US7626907B2 · kind B2 · utility
5Cited by
34References
22Claims
0Family size
Inventors
Key dates
| Filing date | May 25, 2005 |
| Grant date | Dec 1, 2009 |
| Priority date | — |
| Expiry date | Jan 19, 2027 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B19/125
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method and an apparatus for determining types of digital versatile discs (DVDs) are provided. The method includes setting related parameters, acquiring a wobble signal from a DVD, setting a frequency dividing factor, and dividing the frequency of the wobble signal by the frequency dividing factor. Then, the time required for the digital versatile disc to spin one round, which is driven by a spindle motor of a disc player, is set as a unit time to calculate the frequency of the frequency-divided wobble signal. Finally, the type of the digital versatile disc is determined according to the frequency of the wobble signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.