Modeling of the glottal flow by physical models with waveform matching properties

Speaker:  Carlo Drioli - ISTC-CNR Padova, Dipartimento di Fonetica e Dialettologia
  Tuesday, April 19, 2005 at 5:30 PM Ore 17.00 te, caffe` e pasticcini
Physical modeling of sounds and voice is used to study and simulate the
sound production mechanisms of various acoustic systems and of
phonation.
One major drawback is that fitting a physical model to real data is
usually a very difficult task. We describe an approach to sound and voice
analysis/synthesis which combines the physical modeling and the
black-box
modeling approaches. We discuss in particular the problem of fitting a
physical model of the glottis to glottal flow waveforms obtained by
inverse-filtering of voiced speech signals. A waveform-matched
low-dimensional model of the glottal source is presented, and a
data-driven identification procedure is outlined. A set of inverse-filtered glottal
flow waveforms with different characteristics is used to test the
effectiveness of the method. Experimental results are shown to demonstrate how the
model can reproduce a wide range of target waveforms.

Place
Ca' Vignal 3 - Piramide, Floor 0, Hall Verde

Contact person
Davide Rocchesso

Publication date
April 7, 2005

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