Second International Conference on Spoken Language Processing (ICSLP'92)

Banff, Alberta, Canada
October 13-16, 1992

Inverse Filtering of the Glottal Waveform Using the Itakura-Saito Distortion Measure

Paavo Alku

Helsinki University of Technology, Acoustics Laboratory, Espoo, Finland

Estimation of the glottal pulseform with inverse filtering is studied in this paper. Automatic computation of the glottal source is usually performed by applying LPC-analysis in order to estimate the vocal tract transfer function. However, the performance of linear prediction decreases as the fundamental frequency of speech increases. Therefore, a new algorithm for computing the vocal tract model is presented. The new method applies the discrete version of the Itakura-Saito distortion measure when the poles of the vocal tract filter are determined. The preliminary results when synthetic acid natural vowels were analysed are discussed shortly.

Full Paper

Bibliographic reference.  Alku, Paavo (1992): "Inverse filtering of the glottal waveform using the Itakura-saito distortion measure", In ICSLP-1992, 847-850.