Interspeech'2005 - Eurospeech

Lisbon, Portugal
September 4-8, 2005

Unified Probabilistic Approach to Error Concealment for Distributed Speech Recognition

Valentin Ion, Reinhold Haeb-Umbach

University of Paderborn, Germany

The transmission errors in a wireless or packet oriented network may dramatically decrease the performance of a distributed speech recognition (DSR) system. Error concealment has been shown to be an effective way to maintain an acceptable word error rate when dealing with error prone communication channels. In this paper we propose an extension of our previously introduced soft features approach for the case that the soft-output of the channel decoder is not available at the server side of the DSR system. We found a simple method to estimate bit reliability information which still gives good speech recognition results. It is shown that some other error concealment schemes turn out to be special cases of the method proposed here.

Full Paper

Bibliographic reference.  Ion, Valentin / Haeb-Umbach, Reinhold (2005): "Unified probabilistic approach to error concealment for distributed speech recognition", In INTERSPEECH-2005, 2853-2856.