EUROSPEECH 2001 Scandinavia
7th European Conference on Speech Communication and Technology
2nd INTERSPEECH Event

Aalborg, Denmark
September 3-7, 2001

                 

Joint Channel Decoding - Viterbi Recognition For Wireless Applications

Alexis Bernard, Abeer Alwan

UCLA, USA

We introduce the concept of joint channel decoding and Viterbi recognition, by which the Viterbi recognizer is modified to take into account the confidence in the decoded feature after channel transmission. We present a metric for evaluating such confidence based on soft decision decoding. As a case study, we quantize MFCCs using predictive VQ. The overall source-channel coding scheme operating at a combined rate of 1 kbps is shown to provide good recognition accuracy over a wide range of Rayleigh fading channels.

Full Paper

Bibliographic reference.  Bernard, Alexis / Alwan, Abeer (2001): "Joint channel decoding - Viterbi recognition for wireless applications", In EUROSPEECH-2001, 2703-2706.