The normalized signal and a signal output from {TAIL ~ a pattern memory section} are supplied to a subtracting section for taking the difference between these two signals for each of {HEAD ~ the intervals} 
The normalized signal and a signal output from { TAIL ~ a pattern memory section } are supplied to a subtracting section for taking the difference between these two signals for each of { HEAD ~ the intervals }
OTH OTH OTH OTH OTH OTH OTH OTH 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 HEAD HEAD HEAD HEAD HEAD HEAD