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Robust speech recognition techniques evaluation for telephony server based in-car applications

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1 Author(s)
Delphin-Poulat, L. ; France Telecom R&D DIH/IPS, Lannion, France

In this paper, the feasibility of designing a speech-recognition based telephony server for in-car applications with an acceptable recognition rate is investigated. The whole acoustic channel (sound pickup, sound transmission over the cellular network, feature extraction) is evaluated: the loss or the gain in performance due to each element is quantified. More precisely, two sound pickup systems (a hypercardioid microphone and a microphone array) were tested. A standard MFCC and the Aurora advanced front-ends were evaluated. Recognition performance was measured before and after transmission over a cellular (GSM) network. The gain of using either a robust sound recording device or noise robust front-end is demonstrated.

Published in:

Acoustics, Speech, and Signal Processing, 2004. Proceedings. (ICASSP '04). IEEE International Conference on  (Volume:1 )

Date of Conference:

17-21 May 2004