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Université De Mons

Faculte Polytechnique De Mons

Acapela Group S.a.

Thierry Dutoit

Geoffrey Wilfart

Thomas Drugman

Baris Bozkurt

Christophe D'Alessandro

Boris Doval

Nicolas Pierret

Vincent Pagel

The present invention is related to a method for coding excitation signal of a target speech comprising the steps of: extracting from a set of training normalized residual frames, a set of relevant normalized residual frames, said training residual frames being extracted from a training speech, synchronized on Glottal Closure Instant(GCI), pitch and energy normalized; determining the target excitation signal of the target speech; dividing said target excitation signal into GCI synchronized target frames; determining the local pitch and energy of the GCI synchronized target frames; normalizing the GCI synchronized target frames in both energy and pitch, to obtain target normalized residual frames; determining coefficients of linear combination of said extracted set of relevant normalized residual frames to build synthetic normalized residual frames close to each target normalized residual frames; wherein the coding parameters for each target residual frames comprise the determined coefficients.

Speech synthesis and coding methods

The present invention is related to a method for estimating from an input signal the resonance frequencies of a system modelled as a source and a filter, comprising the steps of&#x2014;determining the Z-transform of the input signal,&#x2014;calculating the differential-phase spectrum of the Z-transformed input signal, whereby the Z-transform is evaluated on a circle centered around the origin of the Z-plane,&#x2014;detecting the peaks on said differential-phase spectrum,&#x2014;attributing the peaks to either the source or the filter,&#x2014;estimating the resonance frequencies from the peaks.

Method for estimating resonance frequencies

Method envelope-invariant for audio signal synthesis from elementary audio waveforms stored in a dictionary wherein:

Envelope-invariant analytical speech resynthesis using periodic signals

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Sirault, Belgium

Thierry Dutoit