Introduction to speech recognition

Abstract

This document contains lectures and practical experimentations using Matlab and implementing a system which is actually correctly classifying three words (one, two and three) with the help of a very small database. To achieve this performance, it uses speech modeling specificities, powerful computer algorithms (dynamic time warping and Dijktra's algorithm) and machine learning (nearest neighbor). This document introduces also some machine learning evaluation metrics.

Figures (31)

• Figure 1: Schéma détaillé de l'oreille.
• Figure 2: Courbe d'audibilité humaine.
• Figure 3: Représentation temporelle du signal sonore.
• Figure 4: Découpage d'une sinusoïde en trames qui ne se chevauchent pas.
• Figure 5: Découpage d'une sinusoïde en trames qui se chevauchent.