Method and system to uniquely associate multicast content with each of multiple recipients
US7058809B2 · kind B2 · utility
66Cited by
26References
60Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Mar 6, 2001 |
| Grant date | Jun 6, 2006 |
| Priority date | — |
| Expiry date | May 6, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N2005/91364
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Methods and systems are disclosed in which contact can be safely distributed and protected in a manner that is viable in terms of bandwidth economy and ensures that clients can be identified by the content received. Copies of encrypted content can be provided such that unique watermarks can be added to the copies. Content can also be both watermarked uniquely for multiple clients and multicasted to the clients. As such, content can be distributed using the bandwidth efficiency of multicasting while providing reliable content protection and watermarking.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.