6. A method according to claim 1 , further comprising storing zeros in entries of the vectors of the time series of second speech parameters {Δ i }, where the entries would otherwise contain values below predetermined threshold values, the threshold values being functions of standard deviations of the entries.
6. A method according to claim 1 , further comprising storing zeros in entries of the vectors of the time series of second speech parameters {Δ i }, where the entries would otherwise contain values below predetermined threshold values, the threshold values being functions of standard deviations of the entries. 18. A method according to claim 6 , wherein the function includes multiplying the standard deviation by about 0.5.