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