The method 8, wherein the calculating {HEAD ~ a power spectral density} of {TAIL ~ the speech signal} using the estimated autocorrelation function comprises: 
of
The method 8 , wherein the calculating { HEAD ~ a power spectral density } of { TAIL ~ the speech signal } using the estimated autocorrelation function comprises :
OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH