Method of protecting copyright of digital video work
US7286668B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 29, 2003 |
| Grant date | Oct 23, 2007 |
| Priority date | — |
| Expiry date | Jan 4, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T2201/0061
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
This invention discloses a method of protecting copyright of a digital video work by using a digital password technology and a digital watermark technology to prevent the unauthorized use of a digital video work. Such method adds password protection of two chrominance arrays of such video work in advance, so that when such video work is published on the Internet, it can only be played in color by a specified player. As long as a user enters the correct password into the specified player, a full color visual effect of such video work can be obtained. If other players are used to play such video work, only a partial gray-scale visual effect can be obtained. Users must request or buy a specific player and a password from the distributor of such video work to play the complete information to prevent piracy.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.