selecting one or more transport packets of {HEAD ~ said one or more transport streams} for {TAIL ~ output} in a remultiplexed transport stream, 
for
selecting one or more transport packets of { HEAD ~ said one or more transport streams } for { TAIL ~ output } in a remultiplexed transport stream ,
OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH