Systems and methods for optical media modification
US7643393B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 5, 2004 |
| Grant date | Jan 5, 2010 |
| Priority date | — |
| Expiry date | Apr 2, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B23/28
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Theft, distribution, and piracy of digital content on optical media (software, video, audio, e-books, any content of any kind that is digitally stored and distributed) is often accomplished by copying it directly to another disc using commonly available copy tools and recordable optical media, or the copying of media to another mass manufactured disc. Methods which cause the copy process to become lengthy and inconvenient, or which produce copies that are significantly measurably different from the original and therefore be recognizable as copies, may deter or prevent an unauthorized individual from making copies. In addition, methods which generate an intended slow-down in the read process of the media can be used to authenticate the media at run time. This offers significant advantages to content creators who wish to protect their products.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.