Method and device for providing controlled access video signals without providing a signal in the clear
US6222926A · kind A · utility
9Cited by
6References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 18, 1996 |
| Grant date | Apr 24, 2001 |
| Priority date | — |
| Expiry date | Dec 18, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N7/167
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A LCD display device for receiving encrypted video data and for decrypting the video data such that a signal is not provided "in the clear" before receipt by the display device. The video data is encrypted within a row of video and decrypted at the display. Alternatively the rows are encrypted by altering the time sequence of display of each row.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.