Method and apparatus for broadcasting data with access control
US6473858B1 · kind B1 · utility
211Cited by
69References
43Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 16, 1999 |
| Grant date | Oct 29, 2002 |
| Priority date | — |
| Expiry date | Apr 16, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N21/8126
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A data broadcasting system is disclosed. The data broadcasting system operates by receiving source material from a number of different sources. The source material is processed by performing adding error correction encoding and in some cases, encryption. The source material from the different sources is then multiplexed together and broadcast on a broadcast medium. The multiplexed digital broadcast is received by a plurality of receiver systems. The receiver systems demultiplex the multiplexed digital stream to obtain desired digital streams. The desired streams are then decrypted if necessary.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.