Just in time delivery of entitlement control message (ECMs) and other essential data elements for television programming
US7912219B1 · kind B1 · utility
49Cited by
5References
27Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 12, 2005 |
| Grant date | Mar 22, 2011 |
| Priority date | — |
| Expiry date | Jun 4, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N21/26606
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Essential data elements, particularly entitlement control messages (ECMs), are inserted in a manner that reduces the overhead bit rate without effecting overall tuning time at the customer receiver or security in satellite, cable or other programming networks. ECMs are inserted into the transport stream by detecting random access points (RAPS) in the encoded programming and inserting the ECM packets in a window just ahead of the RAP.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.