In a subscriber television system with a host terminal, the present
invention allows the identification of the individual packets from two
separate MPEG transport streams that have been multiplexed together for
decoding by a single external conditional access or point-of-deployment
(POD) module. The decoding of individual packets from two separate MPEG
transport streams supports the use of multiple tuner host terminals for
such functions as picture-in-picture (PIP) program viewing and the
viewing of one program while recording a second program.