Graduate School and Research Center in Digital Sciences

New models for characterizing mobile terminal loudspeaker distortions

Mossi, Moctar; Yemdji, Christelle; Evans, Nicholas; Hergoltz, C; Beaugeant, Christophe; Degry, P

IWAENC 2010, International Workshop on Acoustic Echo and Noise Control, August 30-September 2, 2010, Tel Aviv, Israel

This paper presents two new approaches to model nonlinear distortions which commonly arise in small loudspeakers used in mobile terminals. One is based upon a new, quantized frequency domain approach and another upon a parallelized polynomial filter approach. Both models are derived from practical studies of the inputoutput characteristics of real mobile terminal loudspeaker and artificial sinusoidal signals. The models are then used to predict the nonlinear distortions in real speech signals. Comparisons to ground-truth distortions are performed to validate the models and confirm that both produce reliable predictions of non-linear distortions. In contrast to existing approaches, the new models are computationally efficient and are suitable for the real-time compensation of non-linear distortions.

Document Bibtex

Title:New models for characterizing mobile terminal loudspeaker distortions
Type:Conference
Language:English
City:Tel Aviv
Country:ISRAEL
Date:
Department:Digital Security
Eurecom ref:3158
Copyright: Copyright VDE Verlag. Personal use of this material is permitted. The definitive version of this paper was published in IWAENC 2010, International Workshop on Acoustic Echo and Noise Control, August 30-September 2, 2010, Tel Aviv, Israel and is available at :
Bibtex: @inproceedings{EURECOM+3158, year = {2010}, title = {{N}ew models for characterizing mobile terminal loudspeaker distortions}, author = {{M}ossi, {M}octar and {Y}emdji, {C}hristelle and {E}vans, {N}icholas and {H}ergoltz, {C} and {B}eaugeant, {C}hristophe and {D}egry, {P}}, booktitle = {{IWAENC} 2010, {I}nternational {W}orkshop on {A}coustic {E}cho and {N}oise {C}ontrol, {A}ugust 30-{S}eptember 2, 2010, {T}el {A}viv, {I}srael}, address = {{T}el {A}viv, {ISRAEL}}, month = {08}, url = {http://www.eurecom.fr/publication/3158} }
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