Patent ID: 7346054

Claim:
A method for co-relating transport packets on different PIDs for compatibility with a new system and a legacy system, the method comprising: replicating a first primary packet to create a second primary packet for a particular PID; generating a CRC checksum for a payload of said first primary packet and a separate CRC checksum for a payload of said second primary packet; replicating said first primary packet to create a first secondary packet and said second primary packet to create a second secondary packet, said first secondary packet having said generated CRC checksum for said first primary packet stored therein and said second secondary packet having said generated CRC checksum for said second primary packet stored therein; and in response to receipt of a new stream, selecting one of said first and said second primary packet and said first and said second secondary packet for said particular PID based on said CRC checksum, in order to co-relate said selected one of said first and said second primary packets and said first and said second secondary packets to one of the legacy system and the new system.