The delay processing part generates {TAIL ~ a speech signal “ai d}” obtained by delaying {HEAD ~ the output speech signal} “ai” by the delay amount “d” 
The delay processing part generates { TAIL ~ a speech signal “ ai d } ” obtained by delaying { HEAD ~ the output speech signal } “ ai ” by the delay amount “ d ”
OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH