{HEAD ~ a processing device} that processes said {TAIL ~ digital input signal} and determines a digital output signal, including converting the digital input signal from a time domain into a frequency domain; and 
processes
{ HEAD ~ a processing device } that processes said { TAIL ~ digital input signal } and determines a digital output signal , including converting the digital input signal from a time domain into a frequency domain ; and
HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH REL OTH 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