In particular, the invention pertains to selectively multiplexing bit streams containing {HEAD ~ one or more programs}, such as {TAIL ~ real time audio video programs} 
such as
In particular , the invention pertains to selectively multiplexing bit streams containing { HEAD ~ one or more programs } , such as { TAIL ~ real time audio video programs }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL