Institute for Telecommunication Sciences
the research laboratory of the National Telecommunications and Information Administration

Andrew A. Catellier; Stephen D. Voran

Abstract: Building on prior work we have developed a no-reference (NR) waveform-based convolutional neural network (CNN) architecture that can accurately estimate speech quality or intelligibility of narrowband and wideband speech segments. These Wideband Audio Waveform Evaluation Networks, or WAWEnets, achieve very high per-speech-segment correlation (Pseg >= 0:92, RMSE <= 0:38) to established full-reference quality and intelligibility estimators (PESQ, POLQA, PEMO, STOI) based on over 17 hours of speech from 127 previously unseen talkers speaking in 13 different languages; just 10% of our total data. NR correlations at this level across such a broad scope are unprecedented. This achievement was made possible by using full-reference estimates as training targets so that WAWEnets could learn implicit undistorted speech models and exploit them to produce accurate NR estimates.

Keywords: wideband; speech quality; no reference (NR); speech intelligibility; convolutional neural network (CNN)

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Lilli Segre, Publications Officer
Institute for Telecommunication Sciences
(303) 497-3572

For technical information concerning this report, contact:

Stephen D. Voran
Institute for Telecommunication Sciences
(303) 497-3839

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