Encryption of a compressed video stream
US7212636B2 · kind B2 · utility
1Cited by
7References
18Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 25, 2002 |
| Grant date | May 1, 2007 |
| Priority date | — |
| Expiry date | Sep 7, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N7/1675
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method for encrypting a compressed video stream comprising independent data blocks and differential data blocks includes the steps of encrypting the independent data blocks with a different level of encryption than that used for the differential data blocks. In one embodiment, the differential data blocks are unencrypted. The method allows the reception of a compressed data stream using powerful algorithms on terminals having small cryptographic capacities.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.