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Conversational Evaluation of Speech Bandwidth Extension Using a Mobile Handset

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5 Author(s)
Pulakka, H. ; Dept. of Signal Process. & Acoust., Aalto Univ., Espoo, Finland ; Laaksonen, L. ; Myllyla, V. ; Yrttiaho, S.
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The quality of narrowband telephone speech can be improved by artificial bandwidth extension. So far, bandwidth extension methods have been evaluated with objective measures and subjective listening-only tests, whereas realistic conversational evaluations have been rare. This article presents a conversational evaluation of two bandwidth extension methods in comparison with narrowband and wideband references. The evaluation was carried out using a mobile handset with a wired earpiece and microphone both in silence and in simulated street noise. The results indicate that speech processed with one of the bandwidth extension methods was preferred over narrowband speech.

Published in:

Signal Processing Letters, IEEE  (Volume:19 ,  Issue: 4 )