Invariant Features and Enhanced Speaker Normalization for Automatic Speech Recognition - Brossura

Muller, Florian

Brossura

ISBN 10: 3832533192 ISBN 13: 9783832533199

Casa editrice: Logos Verlag Berlin, 2013

Riassunto

Automatic speech recognition systems have to handle various kinds of variabilities sufficiently well in order to achieve high recognition rates in practice. One of the variabilities that has a major impact on the performance is the vocal tract length of the speakers. Normalization of the features and adaptation of the acoustic models are commonly used methods in speech recognition systems. In contrast to that, a third approach follows the idea of extracting features with transforms that are invariant to vocal tract lengths changes. This work presents several approaches for extracting invariant features for automatic speech recognition systems. The robustness of these features under various training-test conditions is evaluated and it is described how the robustness of the features to noise can be increased. Furthermore, it is shown how the spectral effects due to different vocal tract lengths can be estimated with a registration method and how this can be used for speaker normalization.

Dettagli dell'edizione

• Editore: Logos Verlag Berlin
• Data di pubblicazione: 2013
• Lingua: Inglese
• ISBN 10: 3832533192
• ISBN 13: 9783832533199
• Rilegatura: Copertina flessibile
• Numero di pagine: 247
• Contatto del produttore: non disponibile
• Persona responsabile: non disponibile