Noise Compensation in a Multi-Modal Verification System
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In this paper we propose an adaptive multi-modal verification system comprised of a modified Minimum Cost Bayesian Classifier (MCBC) and a method to find the reliability of the speech expert for various noisy conditions. The modified MCBC takes into account the reliability of each modality expert, allowing the de-emphasis of the contribution of opinions from the expert affected by noise. Reliability of the speech expert is found without directly modeling the noisy speech or finding the reliability a priori for various conditions of the speech signal. Experiments on the Digit Database show the Total Error (TE) to be reduced by 78% when compared to a non-adaptive system.
2001 IEEE International Conference on Acoustics, Speech, and Signal Processing Proceedings, Volume I of VI Speech Processing 1
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