Abstract
We propose a piecewise linear classifier for use as the decision stage in a two-modal verification system, comprised of a face expert and a speech expert. The classifier utilizes a fixed decision boundary that has been specifically designed to account for the effects of noisy audio conditions. Experimental results show that, in clean conditions, the proposed classifier is outperformed by a traditional weighted summation decision stage (using both fixed and adaptive weights); however, in high noise conditions the classifier obtains better performance than the fixed approach and has similar performance as the adaptive approach, with the advantage of having a fixed (non-adaptive) structure.
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