Secure and personalized broadcasting of audiovisual streams by a hybrid unicast/multicast system
US7643478B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 24, 2004 |
| Grant date | Jan 5, 2010 |
| Priority date | — |
| Expiry date | Dec 5, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N21/6405
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A process for secure distribution of digital audiovisual streams according to a standard, normalized or proprietary format including separating an original stream into two parts, transmitting the parts to addressee equipment, generating a modified main stream having a format of the original stream and complementary information with any format including digital information suitable to permit reconstruction of the original stream, and transmitting the modified stream from a distribution server via separate paths during distribution in an extended, secure multicasting mode to the addressee equipment from a secure central server passing via at least one router and at least one switch connecting the addressee equipment to the central server via at least one access point.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.