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Subjective Intelligibility of Deep Neural Network-Based Speech Enhancement

Gelderblom, Femke B.; Tronstad, Tron Vedul; Viggen, Erlend Magnus
Journal article, Peer reviewed
Published version
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IS171041.PDF (397.7Kb)
Permanent lenke
http://hdl.handle.net/11250/2467464
Utgivelsesdato
2017
Metadata
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  • Institutt for elektroniske systemer [1555]
  • Publikasjoner fra CRIStin - NTNU [20946]
Originalversjon
Interspeech. 2017, 1968-1972.   10.21437/Interspeech.2017-1041
Sammendrag
Recent literature indicates increasing interest in deep neural networks for use in speech enhancement systems. Currently, these systems are mostly evaluated through objective measures of speech quality and/or intelligibility. Subjective intelligibility evaluations of these systems have so far not been reported. In this paper we report the results of a speech recognition test with 15 participants, where the participants were asked to pick out words in background noise before and after enhancement using a common deep neural network approach. We found that, although the objective measure STOI predicts that intelligibility should improve or at the very least stay the same, the speech recognition threshold, which is a measure of intelligibility, deteriorated by 4 dB. These results indicate that STOI is not a good predictor for the subjective intelligibility of deep neural network-based speech enhancement systems. We also found that the postprocessing technique of global variance normalisation does not significantly affect subjective intelligibility.
Utgiver
International Speech and Communication Association
Tidsskrift
Interspeech

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