Holographic recording medium and encoding/decoding method thereof
US7944795B2 · kind B2 · utility
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27Claims
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Key dates
| Filing date | Jul 25, 2008 |
| Grant date | May 17, 2011 |
| Priority date | — |
| Expiry date | Dec 9, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2220/2504
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A holographic recoding medium is provided, having holographic pages. Each page has reference mark (RM) placement areas at fixed locations for placing RM patterns. The reference marks are used to calibrate data images of data areas each of which is enclosed by at least three RM regions. Hidden information of the medium is stored by an specific encoded pattern based on existence, types and arrangements of the RM marks.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.