Suppression of MPEG Transport Streams over IP Outputs from a Standby Element in a Redundant System
Original Publication Date: 2004-Nov-05
Included in the Prior Art Database: 2004-Nov-05
MPEG transport streams are increasingly being carried over Ethernet rather than the traditional media such as ASI or DS-3. Unlike the traditional media Ethernet, especially at gigabit speeds, does not readily accommodate a simple change over switch to select the output of a redundant pair of transport stream sources (encoders, multiplexers, etc). Therefore when a back up element takes over from the primary following a failure provision must be made to suppress the output of the failed element to prevent contending transport streams being delivered to the destination element or the bandwidth of the transmission medium being overloaded. Because the failing element is in a failed condition its internal control system cannot be relied upon to perform this function and an alternative method is required.