13th Annual Conference of the International Speech Communication Association

Portland, OR, USA
September 9-13, 2012

Utilization of the Lombard Effect in Post-.ltering for Intelligibility Enhancement of Telephone Speech

Emma Jokinen (1), Paavo Alku (1), Martti Vainio (2)

(1) Department of Signal Processing and Acoustics, Aalto University, Espoo, Finland
(2) Institute of Behavioural Sciences, University of Helsinki, Helsinki, Finland

Post-filtering methods are used in mobile communications to improve the quality and intelligibility of speech. This paper introduces a noiseadaptive post-filtering algorithm that models the spectral effects observed in natural Lombard speech. The proposed method and another postfiltering technique were compared to unprocessed speech and natural Lombard speech in subjective listening tests in terms of intelligibility and quality. The results indicate that the proposed method outperforms the reference method in difficult noise conditions.

Index Terms: Speech enhancement, post-filtering, intelligibility, Lombard effect

Full Paper

Bibliographic reference.  Jokinen, Emma / Alku, Paavo / Vainio, Martti (2012): "Utilization of the lombard effect in post-.ltering for intelligibility enhancement of telephone speech", In INTERSPEECH-2012, 591-594.