Method and apparatus for minimizing conditional access information overhead while ensuring conditional access information reception in multi-tuner receivers
US7000241B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 21, 2002 |
| Grant date | Feb 14, 2006 |
| Priority date | — |
| Expiry date | Feb 4, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N21/4623
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method and apparatus for receiving conditional access information (CAI) on one or more of a plurality of tuners receiving the CAI from a first tuner of the plurality of tuners is disclosed. The method comprises the steps of determining if the CAI is of a first type that is transmitted by all of a plurality of transponders or of a second type that is transmitted by fewer than all of the plurality of transponders; passing, to a conditional access module, only CAI from the first tuner and rejecting CAI from any other tuner if the CAI is of a type that is transmitted by all transponders; and passing, to the conditional access module, all CAI from any of the plurality of tuners if the CAI is of a type that is transmitted by fewer than all transponders.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.