Wobble information detection method and wobble information detection apparatus for optical recording medium
US7193936B2 · kind B2 · utility
2Cited by
1References
4Claims
0Family size
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Key dates
| Filing date | Apr 12, 2004 |
| Grant date | Mar 20, 2007 |
| Priority date | — |
| Expiry date | Oct 26, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B7/0052
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method and apparatus for detecting information recorded as a phase-modulated wobble along a track of an optical disk, whereby a reference phase section is recorded with wobble having a predetermined reference phase and whereby respective polarities of phase integration values obtained by synchronous detection of phase-modulated unit sections following the reference phase section, in a playback wobble signal, are compared with the polarity of a reference phase integration value obtained for the reference phase section, to thereby detect respective bit states expressed by the phase-modulated unit sections.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.