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Contribution à une meilleure approche dans la détection et l’estimation de la fréquence laryngienne

Contribution to a better approach for laryngeal frequency detection and estimation

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Résumé

L’utilisation combinée des informations sur la fréquence laryngienne, portées simultanément par le module de la transformée de Fourier court-terme et la fonction de distribution des fréquences instantanées, conduit à une meilleure précision dans l’estimation de cette fréquence. Deux paramètres sont définis : le coefficient de dissymétrie spectrale et la fonction d’intercorrélation. Ils introduisent une bonne discrimination dans la nature des tranches analysées assurant ainsi la détection exacte du voisement et du non-voisement. L’exploitation de la sensibilité de ces paramètres par rapport à la nature des tranches permet l’élaboration d’une décision voisé/mixte/non voisé et la spécification de la source mixte.

Abstract

Combined use of different laryngeal frequency information furnished simultaneously by short-time Fourier transform and by instantaneous frequency distribution function leads to a higher precision of the frequency estimation. Two parameters are defined : the spectral dissymmetry coefficient and the “inter-correlation function. These parameters give a clear insight into the nature of the analysed speech windows, leading to an exact detection of the voicing feature. The exploitation of the sensibility with respect to the nature of the speech windows enables the extraction of voiced/mixed/unvoiced decision and also the specification of the mixed source.

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  1. Polytechnique de Mons, boulevard Dolez, 31, B-7000, Mons

    Masata Pasi Bengi, René Boite & Henri Leich

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  1. Masata Pasi Bengi
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  2. René Boite
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  3. Henri Leich
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Bengi, M.P., Boite, R. & Leich, H. Contribution à une meilleure approche dans la détection et l’estimation de la fréquence laryngienne. Ann. Télécommun. 46, 319–334 (1991). https://doi.org/10.1007/BF02999403

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  • DOI: https://doi.org/10.1007/BF02999403

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