Optical information reproduction apparatus and optical information reproduction method
US5499226A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 9, 1993 |
| Grant date | Mar 12, 1996 |
| Priority date | — |
| Expiry date | Dec 9, 2013 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B20/1403
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
In an optical information reproduction apparatus, digital information recorded as an optical mark on an optical information recording medium is reproduced in the following manner. A light beam is applied to the recording medium, and the obtained reproduction signal is binarized. The binary reproduction signal is sampled by a sampling clock which is generated by a PLL control signal generator, and is synchronized with the binary reproduction signal so as to reproduce the digital information. The PLL control signal generator achieves synchronization based on the leading and trailing edges of a change point of the binary reproduction signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.