If the low complexity processor is selected, an output signal is generated using the low complexity processor, and if the high complexity processor is selected, {HEAD ~ the output signal} is generated using {TAIL ~ the high complexity processor} 
is generated using
If the low complexity processor is selected , an output signal is generated using the low complexity processor , and if the high complexity processor is selected , { HEAD ~ the output signal } is generated using { TAIL ~ the high complexity processor }
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 HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL