Systèmes fiables de reconnaissance vocale

Systèmes fiables de reconnaissance vocale

Nilashree Madakath / Sushama Wagh

115,85 €
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Editorial:
KS OmniScriptum Publishing
Año de edición:
2025
Materia
Tecnología: cuestiones generales
ISBN:
9786202201018
115,85 €
IVA incluido
Disponible

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Ces dernières années, bien que la reconnaissance du locuteur soit très prometteuse, son adoption à grande échelle a été entravée par des performances sous-optimales dues à une faible précision et à des problèmes de fiabilité. Cependant, il est essentiel de relever ces défis pour exploiter pleinement les capacités de la reconnaissance biométrique vocale, les enquêtes indiquant une préférence pour la biométrie vocale. Dans les situations où l’authentification biométrique du locuteur à distance est employée, le maintien de l’intégrité des vecteurs de caractéristiques cepstrales extraits devient primordial en présence de bruit de canal. Pour améliorer la précision de la reconnaissance du locuteur dans les applications à distance, une nouvelle approche est proposée, dans laquelle des codes de contrôle de parité à faible densité (LDPC) et des codes polaires sont utilisés à la fois pour le stockage et la transmission des coefficients cepstraux de fréquence Mel (MFCC) dérivés d’échantillons vocaux. Quatre méthodes proposées et mises en œuvre sont décrites. Elles permettent d’obtenir des taux d’erreurs binaires plus faibles sur des canaux bruyants ainsi qu’un taux de précision élevé pour les systèmes de reconnaissance des locuteurs à distance. Ce livre conclut sur l’utilisation suggestive du codage LDPC et du codage polaire comme partie intégrante de la reconnaissance du locuteur à distance dans le cadre d’un système d’authentification biométrique multimodal.

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