Les Inscriptions à la Bibliothèque sont ouvertes en
ligne via le site: https://biblio.enp.edu.dz
Les Réinscriptions se font à :
• La Bibliothèque Annexe pour les étudiants en
2ème Année CPST
• La Bibliothèque Centrale pour les étudiants en Spécialités
A partir de cette page vous pouvez :
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Détail de l'indexation
M003008
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Ouvrages de la bibliothèque en indexation M003008
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Titre : Codage par SVD Type de document : texte imprimé Auteurs : Baali, Hamza, Auteur ; Berkani, Daoud, Directeur de thèse Editeur : [S.l.] : [s.n.] Année de publication : 2008 Importance : 70 f. Présentation : ill. Format : 30 cm Accompagnement : CD Note générale : Mémoire de Magister: Electronique: Alger, Ecole Nationale Polytechnique: 2008
Bibliogr. f. 66 - 67 Annexe f. 68 - 70Langues : Français (fre) Mots-clés : Codage de la parole
SVD
Modélisation d’excitation
Codage à bas débitIndex. décimale : M003008 Résumé : Dans ce travail la transformée optimale SVD est appliquée pour le codage du signal vocal.
Il est montré qu’une petite partie de la transformée du vecteur original d’excitation est suffisante pour reconstruire une parole de très bonne qualité.
Un algorithme d’allocation dynamique de bits est appliqué pour quantifier les composantes transformées d’excitation selon leurs importances perceptuelles.
Les paramètres LPC sont quantifiés dans le domaine LSF à 34 bits/trame.
Les résultats ont été simulés en arithmétique flottante.
Les bonnes performances du modèle sont confirmées par des mesures objectives de distorsion.
Notre méthodologie de travail est axée autour de quatre chapitres.
Le premier présente la théorie acoustique de la production de la parole, les éléments de phonétique, la représentation temporelle du signal de parole, la modélisation autorégressive et la représentation paramétrique du spectre.
Dans le second nous abordons les notions de base de la théorie de l'information relatives au codage source, les types de quantification scalaire et vectorielle, le principe d'analyse par synthèse et une présentation de différents codeurs de parole.
On s’intéresse surtout au rôle central de l’excitation dans un codeur.
Les critères de performances en matière de mesures objectives et subjectives couramment utilisés pour juger et classer les méthodes de codage sont montrées.
Le troisième chapitre est dédié à la Décomposition en Valeurs Singulières (SVD), ses caractéristiques et son application à la modélisation du signal d’excitation et une présentation du processeur TMS320C6713.
Enfin, dans le quatrième et le dernier chapitre nous étudions des approches de codage suivi par la quantification complète des paramètres du codeur et l’évaluation de ses performances.Codage par SVD [texte imprimé] / Baali, Hamza, Auteur ; Berkani, Daoud, Directeur de thèse . - [S.l.] : [s.n.], 2008 . - 70 f. : ill. ; 30 cm + CD.
Mémoire de Magister: Electronique: Alger, Ecole Nationale Polytechnique: 2008
Bibliogr. f. 66 - 67 Annexe f. 68 - 70
Langues : Français (fre)
Mots-clés : Codage de la parole
SVD
Modélisation d’excitation
Codage à bas débitIndex. décimale : M003008 Résumé : Dans ce travail la transformée optimale SVD est appliquée pour le codage du signal vocal.
Il est montré qu’une petite partie de la transformée du vecteur original d’excitation est suffisante pour reconstruire une parole de très bonne qualité.
Un algorithme d’allocation dynamique de bits est appliqué pour quantifier les composantes transformées d’excitation selon leurs importances perceptuelles.
Les paramètres LPC sont quantifiés dans le domaine LSF à 34 bits/trame.
Les résultats ont été simulés en arithmétique flottante.
Les bonnes performances du modèle sont confirmées par des mesures objectives de distorsion.
Notre méthodologie de travail est axée autour de quatre chapitres.
Le premier présente la théorie acoustique de la production de la parole, les éléments de phonétique, la représentation temporelle du signal de parole, la modélisation autorégressive et la représentation paramétrique du spectre.
Dans le second nous abordons les notions de base de la théorie de l'information relatives au codage source, les types de quantification scalaire et vectorielle, le principe d'analyse par synthèse et une présentation de différents codeurs de parole.
On s’intéresse surtout au rôle central de l’excitation dans un codeur.
Les critères de performances en matière de mesures objectives et subjectives couramment utilisés pour juger et classer les méthodes de codage sont montrées.
Le troisième chapitre est dédié à la Décomposition en Valeurs Singulières (SVD), ses caractéristiques et son application à la modélisation du signal d’excitation et une présentation du processeur TMS320C6713.
Enfin, dans le quatrième et le dernier chapitre nous étudions des approches de codage suivi par la quantification complète des paramètres du codeur et l’évaluation de ses performances.Exemplaires
Code-barres Cote Support Localisation Section Disponibilité Spécialité Etat_Exemplaire M003008A M003008 Papier Bibliothèque centrale Mémoire de Magister Disponible M003008B M003008 Papier Bibliothèque centrale Mémoire de Magister Disponible Documents numériques
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