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National Repository of Grey Literature 2 records found  Search took 0.00 seconds. 
Speech spectrum smoothing by cepstrum and pseudo-cepstrum weighting
 Plšek, Martin
In the paper an experimental vocal tract model of the 6.sup.th.sup. order excited by a synthetic voiced excitation signal with variable fundamental frequency is used as a testing signal for several cepstral and pseudo-cepstral smoothing approaches. The aim of the investigation is to find a reliable method for speech spectrum smoothing convenient also for female and child voices with high fundamental frequency.
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Design of FIR vocal tract models with linear and nonlinear phase
 Vondra, Martin ; Vích, Robert
Experiences with the IIR cepstral model based on Padé approximation of the exponential function indicate some problems with stability. An experiment in designing a FIR cepstral vocal tract model has been made. The computation of the impulse response of the FIR filter that realizes the vocal tract model can be accomplished either using the window method of digital filter design or by a recursive computation directly from real cepstrum using the minimum-phase approximation.
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