ADIP demodulation method and apparatus
US7289410B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 22, 2003 |
| Grant date | Oct 30, 2007 |
| Priority date | — |
| Expiry date | Mar 5, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B7/0053
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An ADIP demodulation method and apparatus, which are used in an optical disk driver to generate the ADIP information according to a wobble signal. The apparatus includes a slicing unit for receiving the wobble signal and generating a wobble pulse, a phase locked loop for generating a reference wobble signal with the same frequency and phase as the wobble pulse and a reference clock with frequency higher than the wobble pulse, a channel bit generator for generating a channel bit signal according to the reference wobble signal and the wobble pulse, and a decoder for decoding to ADIP information according to the channel bit signal. The channel bit generator generates a difference signal between the wobble pulse and the reference wobble signal, and outputs the channel bit signal according to the difference signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.