Glottal Source Estimation Using an Automatic Chirp Decomposition

Abstract

Abstract. In a previous work, we showed that the glottal source can be estimated from speech signals by computing the Zeros of the ZTransform (ZZT). Decomposition was achieved by separating the roots inside (causal contribution) and outside (anticausal contribution) the unit circle. In order to guarantee a correct deconvolution, time alignment on the Glottal Closure Instants (GCIs) was shown to be essential. This paper extends the formalism of ZZT by evaluating the Z-transform on a contour possibly different …