Method and apparatus for storing copy protection information separately from protected content
US8365307B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 6, 2008 |
| Grant date | Jan 29, 2013 |
| Priority date | — |
| Expiry date | Oct 15, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B20/00855
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A copy protection apparatus and method enabling storage of copy protection information separately from protected content is disclosed. One embodiment includes a digital data signal receiver to receive a digital data signal, the digital data signal receiver also to receive a copy protection signal produced from a copy protection information file being storable on a copy protection information storage device, a digital to analog converter operatively connected to the digital data signal receiver for converting the digital data signal to an analog signal, and a signal modifier connected to the digital to analog converter and the digital data signal receiver to produce a viewable copy protected analog signal from the analog signal and the copy protection signal, the copy protection signal specifying a modification to the analog signal to change video lines of the analog signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.