Multiple resolution analysis for robust automatic speech recognition - Archive ouverte HAL
Article Dans Une Revue Computer Speech and Language Année : 2006

Multiple resolution analysis for robust automatic speech recognition

Roberto Gemello
  • Fonction : Auteur
Franco Mana
  • Fonction : Auteur
Dario Albesano
  • Fonction : Auteur

Résumé

This paper investigates the potential of exploiting the redundancy implicit in multiple resolution analysis for automatic speech recognition systems. The analysis is performed by a binary tree of elements, each one of which is made by a half-band filter followed by a down sampler which discards odd samples. Filter design and feature computation from samples are discussed and recognition performance with different choices is presented. A paradigm consisting in redundant feature extraction, followed by feature normalization, followed by dimensionality reduction is proposed. Feature normalization is performed by denoising algorithms. Two of them are considered and evaluated, namely, signal-to-noise ratio-dependent spectral subtraction and soft thresholding. Dimensionality reduction is performed with principal component analysis. Experiments using telephone corpora and the Aurora3 corpus are reported. They indicate that the proposed paradigm leads to a recognition performance with clean speech, measured in word error rate, marginally superior to the one obtained with perceptual linear prediction coefficients. Nevertheless, performance of the proposed analysis paradigm is significantly superior when used with noisy data and the same denoising algorithm is applied to all the analysis methods, which are compared.

Dates et versions

hal-01320119 , version 1 (23-05-2016)

Identifiants

Citer

Roberto Gemello, Franco Mana, Dario Albesano, Renato de Mori. Multiple resolution analysis for robust automatic speech recognition. Computer Speech and Language, 2006, ⟨10.1016/j.csl.2004.06.001⟩. ⟨hal-01320119⟩

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