adjusting {HEAD ~ each program clock reference time stamp} of {TAIL ~ each scheduled program clock reference} bearing transport packet based on a drift between said local clock and a program system time clock from which said program clock reference time stamp was generated, if any, and 
of
adjusting { HEAD ~ each program clock reference time stamp } of { TAIL ~ each scheduled program clock reference } bearing transport packet based on a drift between said local clock and a program system time clock from which said program clock reference time stamp was generated , if any , and
OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH