EUROSPEECH 2001 Scandinavia
7th European Conference on Speech Communication and Technology

Aalborg, Denmark
September 3-7, 2001


Graceful Degradation of Speech Recognition Performance Over Lossy Packet Networks

Eve A. Riskin, Constantinos Boulis, Scott Otterson, Mari Ostendorf

University of Washington, USA

This paper explores packet loss recovery in client-server Automatic Speech Recognition (ASR) systems. A forward error correction (FEC) system is designed and tested over several channel loss models, at variable amounts of data acquisition delay. In experiments with simulated packet loss, the FEC system provides robust ASR performance which degrades gracefully as packet loss rates increase. Comparing this scheme to several alternatives under low and medium loss channel conditions, we found one approach (multiple transmission plus interpolation) that yielded similar performance, but the FEC system should scale better to lower bit rate conditions.

Full Paper

Bibliographic reference.  Riskin, Eve A. / Boulis, Constantinos / Otterson, Scott / Ostendorf, Mari (2001): "Graceful degradation of speech recognition performance over lossy packet networks", In EUROSPEECH-2001, 2715-2718.