A harmonic bandwidth extension method for audio codecs

Nagel F, Disch S (2009)

Publication Type: Conference contribution

Publication year: 2009

Journal

2013 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP)

Publisher: Institute of Electrical and Electronics Engineers Inc.

Pages Range: 145-148

Conference Proceedings Title: ICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings

Event location: TWN

ISBN: 9781424423545

DOI: 10.1109/icassp.2009.4959541

Abstract

Today's efficient audio codecs for low bitrate application scenarios often rely on parametric coding of the upper frequency band portion of a signal while the lower frequency band portion of the same is conveyed by a waveform preserving coding method. At the decoder, the upper frequency signal is approximated from the lower frequency data using the upper frequency band parameters. However, commonly used methods of bandwidth extension almost inevitably suffer from a sensation of unpleasant roughness, which is especially present for tonal music items. In this paper we expose the origin of the roughness and propose a bandwidth extension method, which does not introduce roughness into the reconstructed audio signal. A listening test demonstrates the advantage of the proposed method compared to a standard bandwidth extension. ©2009 IEEE.

Involved external institutions

Fraunhofer-Institut für Integrierte Schaltungen (IIS) DE Germany (DE) Gottfried Wilhelm Leibniz Universität Hannover DE Germany (DE)

How to cite

APA:

Nagel, F., & Disch, S. (2009). A harmonic bandwidth extension method for audio codecs. In ICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings (pp. 145-148). TWN: Institute of Electrical and Electronics Engineers Inc..

MLA:

Nagel, Frederik, and Sascha Disch. "A harmonic bandwidth extension method for audio codecs." Proceedings of the 2009 IEEE International Conference on Acoustics, Speech, and Signal Processing, ICASSP 2009, TWN Institute of Electrical and Electronics Engineers Inc., 2009. 145-148.

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