wherein {TAIL ~ an output speech signal} of the delay processing part is inputted to the estimated wraparound speech signal generating part as {HEAD ~ an input signal} 
wherein { TAIL ~ an output speech signal } of the delay processing part is inputted to the estimated wraparound speech signal generating part as { HEAD ~ an input signal }
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 HEAD HEAD HEAD HEAD HEAD HEAD HEAD