Abstract
Hands-free operation is an important feature of many communication terminals such as telephones and conferencing systems. In general, the quality of speech from a hands-free terminal is degraded by ambient noise and by acoustic echo. This paper presents some of the activities in acoustic echo control of a cec Esprit consortium. A short description is given of a database collected specifically for testing acoustic echo cancellers and of a simple methodology for comparative evaluation of adaptive acoustic echo control methods. Eight methods have been investigated so far. Annotated bibliographies are given for each method and comparative performance results are presented.
Résumé
Le mode de fonctionnement en mains-libres est une caractéristique importante de beaucoup de terminaux actuels tels que téléphones et systèmes de téléconférence. En général, la qualité de la parole en provenance d’un terminal mains-libres est dégradée par le bruit ambiant ainsi que par l’écho acoustique. Cet article présente une partie des activités en protection contre l’écho acoustique développées au sein d’un projet Esprit. La description succincte d’une base de données enregistrée spécifiquement pour l’évaluation d’annuleurs d’écho acoustique est donnée. Conjointement, une méthodologie simple d’évaluation comparative pour les annuleurs d’écho acoustique est présentée. Huit algorithmes ont été étudiés à ce jour dont chaque méthode fait l’objet d’un résumé bibliographique et des résultats comparatifs sont fournis.
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Naylor, P., Alcazar, J., Boudy, J. et al. Enhancement of hands-free telecommunications. Ann. Télécommun. 49, 373–379 (1994). https://doi.org/10.1007/BF02999425
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DOI: https://doi.org/10.1007/BF02999425