Jack J. Jiang
Dept. of Otolaryngology---Head and Neck Surgery, Northwestern Univ., 303 E. Chicago Ave., Chicago, IL 60611
Natl. Instruments, TX 78730
David G. Hanson Eric Cuasay Jerilyn Logemann
Northwestern Univ., Chicago, IL 60611
It has been widely recognized that the FFT-based spectrogram does not provide good simultaneous resolution in both time and frequency domains. A new method of spectral analysis has been developed based upon the Gabor expansion and the Wigner--Ville distribution. The resolution of the Gabor spectrogram is twice as high as that of a FFT-based spectrogram. In this report, FFT-based spectrograms and Gabor spectrograms are compared for 5 English vowels, 6 stops consonants, 4 fricatives, and vowels format transitions in a CVD contents on 6 normal subjects. Results demonstrate that the Gabor spectrogram is a promising alternative for FFT-based spectrogram in speech analysis because of its higher temporal and frequency resolution.