25. The method according to claim 24 , wherein one or a plurality of spectral centroid, spectral flux, and spectral roll off are computed from said set of cepstral coefficients per frame.
25. The method according to claim 24 , wherein one or a plurality of spectral centroid, spectral flux, and spectral roll off are computed from said set of cepstral coefficients per frame. 26. The method according to claim 25 , wherein one or a plurality of variances of said spectral centroid, of said spectral flux, or of said spectral roll off are computed.