Digital media with token for analog reconversion detection
US8208720B2 · kind B2 · utility
0Cited by
5References
18Claims
0Family size
Inventor
Key dates
| Filing date | Jun 27, 2008 |
| Grant date | Jun 26, 2012 |
| Priority date | — |
| Expiry date | Apr 27, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T2201/0064
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A digital media with encoded audio-visual content includes an encoded token. The token comprises visual data having defined characteristics, which are designed such that when the audio-visual content is output as analog output and then re-recorded as digital data, the resulting digital data includes an altered token. Digital data may be processed to detect altered tokens indicating that the data was recorded from an analog output. When an altered token is detected, the copy may be considered to be an unauthorized copy and handled accordingly.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.