资料来源 : pyDict

对数倒频谱; 对数逆谱; 倒频谱

资料来源 : Free On-Line Dictionary of Computing

cepstrum
     
         (Coined in a 1963 paper by Bogert, Healey, and
        Tukey) The {Fourier transform} of the log-magnitude spectrum:
     
        	fFt(ln( | fFt(window . signal) | ))
     
        This function is used in {speech recognition} and possibly
        elsewhere.  Note that the outer transform is NOT an inverse
        Fourier transform (as reported in many respectable DSP texts).
     
        [What's it for?]
     
        (1997-01-07)