Recoverable cryptographic transformation on YUV data suitable for compressions
US5991403A · kind A · utility
25Cited by
5References
36Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 23, 1996 |
| Grant date | Nov 23, 1999 |
| Priority date | — |
| Expiry date | Dec 23, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N21/26613
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method for encoding MPEG compatible video data for subsequent compression comprises detecting a plurality of frames of video data organized as a GOP, generating an encryption key for the GOP, and encrypting the video data using GOP-synchronized substitution, transposition, and rotation transformations that are parameterized by offsets derived from the generated encryption key.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.