Broadcast and reception, and conditional access system therefor
US7644429B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 24, 2002 |
| Grant date | Jan 5, 2010 |
| Priority date | — |
| Expiry date | Feb 11, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N21/4405
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A digital satellite television system has a plurality of set-top-boxes associated with a plurality of end users' television receivers, a modem and a decoder housed in each STB, a Subscriber Authorization System (SAS) incorporating or having associated therewith a plurality of communication servers, means included in the SAS for generating Electronic Managements Messages (EMM), a back channel interconnecting each of the STBs individually with the SAS, means included in the SAS and each STB so that the necessary information required to inject a relevant EMM into the system is supplied directly to the relevant communication server included in or associated with the SAS to authorize the release of the said EMM and/or means to connect the modem to the back channel and means whereby an EMM is transmissible to the decoder directly from a relevant communication server included in or associated with the SAS. Further important features are also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.