Intelligibility Assessment of a System for Artifical Bandwidth Extension of Telephone Speech
نویسندگان
چکیده
Techniques for artificial bandwith extension (ABWE) [1] aim to extend the limited audio bandwidth of current narrowband telephone systems (0.3 – 3.4 kHz) towards the wideband frequency range (0.05 – 7 kHz). In several studies, a consistent quality advantage of the enhanced signals over narrowband speech is reported, e.g., [2]. In this contribution we evaluate an ABWE algorithm under realistic conditions and assess its impact on the speech intelligibility.
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Telephone systems commonly transmit narrowband (NB) speech with an audio bandwidth limited to the traditional telephone band of 300-3400 Hz. To improve the quality and intelligibility of speech degraded by narrow bandwidth, researchers have tried to standardize the telephonic networks by introducing wideband (50-7000 Hz) speech codecs. Wideband (WB) speech transmission requires the transmission...
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