Publications – Details
Artificial Bandwidth Extension of Wideband Speech by Pitch-Scaling of Higher Frequencies
- Authors:
- Bernd Geiser and Peter Vary
- Book Title:
- Workshop Audiosignal- und Sprachverarbeitung (WASP)
- Editor:
- Matthias Horbach
- Volume:
- 220
- Series:
- Lecture Notes in Informatics (LNI)
- Venue:
- Koblenz
- Event Date:
- 16.-20.9.2013
- Organization:
- Gesellschaft für Informatik e.V. (GI)
- Date:
- Sept. 2013
- Pages:
- 2892–2901
- ISBN:
- 978-3-88579-614-5
- ISSN:
- 1617-5468
- Note:
- Workshop im Rahmen der 43. Jahrestagung der Gesellschaft für Informatik
- Language:
- English
Abstract
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.
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