H - Electricity – 04 – L
Patent
H - Electricity
04
L
H04L 12/56 (2006.01) H04L 29/10 (2006.01) H04N 7/24 (2006.01)
Patent
CA 2358607
An efficient, integrated solution for providing packet identifier (PID) aliasing for input transport streams, such as MPEG2 streams. MPEG packets with their original packet identifiers (PIDs) are encapsulated using a customized Internet Protocol (IP)-like scheme, and routed from an input circuit card to one or more various target processor cards in a chassis. The encapsulating packet includes a destination address field that provides source information regarding the received packet, such as a source slot and port, and the original PID. At the processor card, the source information is used by a router to look up a PID alias value, which is then inserted into another field of the encapsulating packet. The encapsulating packet is routed to a PID alias function, which replaces the original PID in the MPEG packet with the alias value. The MPEG packet is then decapsulated, e.g., for further processing on the card. The router may also look up a processing path to route the encapsulated packet on for the PID aliasing, decapsulation, and further processing, which are each provided in multiple available paths on the processor card.
General Instrument Corporation
Ridout & Maybee Llp
LandOfFree
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