4th International Conference on Spoken Language Processing

Philadelphia, PA, USA
October 3-6, 1996

A New ASR Approach Based on Independent Processing and Recombination of Partial Frequency Bands

Hervé Bourlard (1,2), Stéphane Dupont (1)

(1) Faculte Polytechnique de Mons - TCTS, Mons, Belgium
(2) Intl. Computer Science Institute, Berkeley, CA, USA

In the framework of hidden Markov models (HMM) or hybrid HMM/Artificial Neural Network (ANN) systems, we present a new approach towards automatic speech recognition (ASR). The general idea is to split the whole frequency band (represented in terms of critical bands) into a few sub-bands on which different recognizers are independently applied and then recombined at a certain speech unit level to yield global scores and a global recognition decision. The preliminary results presented in this paper show that such an approach, even using quite simple recombination strategies, can yield at least comparable performance on clean speech while providing better robustness in the case of noisy speech.

Full Paper

Bibliographic reference.  Bourlard, Hervé / Dupont, Stéphane (1996): "A new ASR approach based on independent processing and recombination of partial frequency bands", In ICSLP-1996, 426-429.