Delivering specific contents to specific recipients using broadcast networks
US8065742B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 30, 2005 |
| Grant date | Nov 22, 2011 |
| Priority date | — |
| Expiry date | Mar 13, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04H2201/30
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Systems and methods for delivering specific contents to specific recipients using broadcast networks. The methods include receiving an AV signal of a broadcast program and supplementary content which contains a tag identifying a specific recipient and specific contents. The specific contents are encrypted with a public key associated with the specific recipient. The supplementary content is combined with the AV signal to form a data-augmented signal which is subsequently encoded and modulated with a carrier signal to form a transmit signal for broadcasting to receivers. Each receiver includes a supplementary decoder for extracting the supplementary content, decrypting the specific contents with a private key corresponding to the public key, and providing the decrypted specific contents to the intended recipient.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.