Method and apparatus for determining a transport bit rate for a Multiprogram transport stream

摘要

Method and apparatus for determining a transport bit rate for a multiprogram transport stream (MPTS) is described. In one example, a plurality of transport bit rates is computed for a respective plurality of programs in the MPTS. A highest transport bit rate and a lowest transport bit rate are selected from the plurality of transport bit rates. An average transport bit rate is computed from the highest transport bit rate and the lowest transport bit rate. The average transport bit rate is provided as an initial transport bit rate for the MPTS. Jitter in the MPTS may be compensated using the initial transport bit rate.

主权项

1. A method of dejittering a multiprogram transport stream (MPTS), the method comprising:
determining the multiprogram transport stream (MPTS) initial transport bit rate for dejittering a multiprogram transport stream (MPTS), wherein the initial transport bit rate is determined by:
computing program transport bit rates for each of a plurality of programs in the multiprogram transport stream (MPTS) using a processor by performing the following:
extracting a pair of program clock reference (PCR) values from the program using the processor;determining a number of packets in the multiprogram transport stream (MPTS) between the pair of PCR values using the processor;determining a number of bits in the number of packets using the processor;dividing the number of bits by a difference in the pair of PCR values using the processor;selecting a highest program transport bit rate from the transport bit rates for the plurality of programs in the multiprogram transport stream (MPTS) and a lowest program transport bit rate from program transport bit rates for the plurality of programs in the multiprogram transport stream (MPTS) using the processor;computing the multiprogram transport stream (MPTS) initial transport bit rate by averaging the highest transport bit rate and the lowest transport bit rate using the processor; and providing to a de-jittering process for the multiprogram transport stream (MPTS) the initial transport bit rate for the multiprogram transport stream (MPTS) for dejittering the multiprogram transport stream (MPTS).