System and Method for Dynamically Allocating Stream Identifiers in a Multi-Encryption Transport System

摘要

The present invention is suitable for use in a multi-encrypted system that dynamically allocates stream identifiers in a second stream depending upon the identifiers in a first stream. The first stream is monitored and counters are incremented with the presence of an identifier. The count for each of the counters is then received. Using the count, a control processor then assigns or revises identifiers in the second stream.

主权项

1. A communications system for transmitting a multi-encrypted transport stream, the multi-encrypted transport stream including an incumbent stream, an overlay stream and a clear stream, each of the streams including a plurality of programs each having a program number and a plurality of packets each having a packet identifier, the communications system comprising:
a device for dynamically allocating program numbers and packet identifiers associated with the overlay stream depending upon the program numbers and packets identifiers present in the incumbent stream, the device comprising:
monitoring means for monitoring and detecting the program numbers and packet identifiers present in the incumbent stream; andprocessing means for assigning unused program numbers and packet identifiers to packet associated with the overlay stream, andwherein the monitoring means continuously monitors the incumbent stream for any changes in program number and packet identifiers, and when changes occur, the processing means checks for conflicts and subsequently reassigns the overlay packet having a conflicting program number or a conflicting packet identifier to another unused program number and packet identifier.