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Artificial bandwidth extension of wideband speech by pitch-scaling of higher frequencies

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2013

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Gesellschaft für Informatik e.V.

Zusammenfassung

In this paper, a simple DFT-domain pitch-scaling technique is used to extend the audio bandwidth of wideband speech (50 Hz - 7 kHz) to the super-wideband range (50 Hz - 12 kHz). Therefore, the higher frequencies of the wideband signal (6 - 7 kHz) are pitch-scaled with a scaling factor of four and the resulting, scaled signal is inserted into the 8 - 12 kHz band. A subjective listening test has been conducted wherein it could be shown that the new proposal clearly outperforms a previous method for artificial bandwidth extension which is based on statistical estimation techniques.

Beschreibung

Geiser, Bernd; Vary, Peter (2013): Artificial bandwidth extension of wideband speech by pitch-scaling of higher frequencies. INFORMATIK 2013 – Informatik angepasst an Mensch, Organisation und Umwelt. Bonn: Gesellschaft für Informatik e.V.. PISSN: 1617-5468. ISBN: 978-3-88579-614-5. pp. 2892-2901. Regular Research Papers. Koblenz. 16.-20. September 2013

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