Conditional access filter as for a packet video signal inverse transport system
US7334248B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 24, 2002 |
| Grant date | Feb 19, 2008 |
| Priority date | — |
| Expiry date | Mar 18, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N21/4623
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method and an apparatus for processing a packetized transport stream that determines whether a sequence of transport packets are received in a proper sequence and whether an error is present in a particular transport packet. The method includes the steps of determining a packet identifier for identifying transport packets associated with a selected program and parsing a packetized transport stream to identify and capture the desired sequence of transport packets in response to the packet identifier. The method further includes the steps of detecting a counter portion, determining whether a desired sequence of transport packets has been received in response to the counter portion, detecting a one bit toggle portion, and determining whether an error exits in the associated transport packet in response to the one bit toggle portion. An apparatus for implementing the method is also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.