The composite autoregressive system can be used to estimate a speech source-filter decomposition in a rigorous manner, thus having potential use in glottal inverse filtering. By introducing a suitable prior, spectral tilt can be introduced into the source component estimation to better correspond to human voice production. However, the current expectationmaximisation based composite autoregress...

In this paper a new inverse filtering technique for the timedomain estimation of the glottal excitation is presented. This approach uses the DAP modeling for the vocal tract characterization, and a spectral model for the derivative of the glottal flow. This spectral model is based on the spectrum of the KLGLOTT88 model for the glottal source. The proposed procedure removes the glottal source fr...

The paper presents the state feedback adaptive robust control approach to track the reference input for a class of nonminimum phase nonlinear systems. The key for this approach is to combine the adaptive robust control design techniques and the inputto-state property to deal with a class of non-minimum phase nonlinear systems with unknown parameter and unstructural uncertainties. The control de...

A method is presented to estimate the effect of intentional raising of fundamental frequency (F0) on vocal intensity. The method, Energy of the Synthesised Period (ESP), is based on computation of the energy of a hypothetical speech sound synthesised using a single period of the glottal volume velocity waveform and a digital filter that models the vocal tract. Both the glottal flow and the voca...

“Throaty” is a term used for voice quality, generally pejorative, but sometimes considered as a desirable timbral ornament in non-classical singing. The throatiness of a male subject’s examples of the vowels /u, i, a, ae/ pronounced in throaty and normal voice were rated by an expert panel, showing that the examples were representative. The formant frequencies of these vowels were analysed by i...

STEREO A and B observations of the radial magnetic field between 1 January 2007 and 31 October 2008 further show significant evidence that in the heliosphere, the ambient radial magnewtic field component with any dynamic effects removed is uniformly distributed. Based on this monopolar nature of the ambient heliospheric field we find that the surface beyond which the magnetic fields are in the ...

This paper describes a blind algorithm, which is compared with two another algorithms proposed in the literature, for estimating of the minimum phase channel parameters. In order to identify blindly the impulse response of these channels, we have used Higher Order Statistics (HOS) to build our algorithm. The simulation results in noisy environment, demonstrate that the proposed method could est...

We consider here the row-by-row decoupling of linear timeinvariant systems by proportional and derivative state feedback. Our contribution, with respect to previous results, is that our procedure is based on simple operator (say matrices) manipulations, without any need to use a canonical form. The only assumptions for applying such a decoupling strategy are that the system is right invertible ...

A well defined voice source is essential for synthesizing different varieties of natural sounding speech. Some insight into the most appropriate specification of this source can be found by analysing phonation typesindifferent languages. Using inverse filtering it is possible to recover the corresponding glottalpulse shapes. Virtually the only reliable measure that can be used to distinguish th...

Model matching by output feedback is completely treated in the geometric approach framework. Self-bounded controlled invariant subspaces are shown to play a crucial role in the synthesis of minimal-order dynamic regulators achieving model matching by output feedback with stability. The approach provides insight into the internal eigenstructure of the minimal self-bounded controlled invariant su...