Speech recognition method using confidence measure evaluation
First Claim
1. A method of automatically recognizing speech utterances, the method comprising the steps of:
- evaluating a recognition result using an initial confidence measure and a plurality of second confidence measures determined for a recognition result, determining a resulting confidence measure by combining the initial confidence measure and the plurality of second confidence measures, wherein the determining step includes, determining parameters for the combining of the second confidence measures using a minimization of a cross-entropy-error measure.
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Abstract
The invention relates to a method of automatically recognizing speech utterances, in which a recognition result is evaluated by means of a first confidence measure and a plurality of second confidence measures determined for a recognition result is automatically combined for determining the first confidence measure. To reduce the resultant error rate in the assessment of the correctness of a recognition result, the method is characterized in that the determination of the parameters weighting the combination of the second confidence measures is based on a minimization of a cross-entropy-error measure. A further improvement is achieved by means of a post-processing operation based on the maximization of the Gardner-Derrida error function.
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Citations
7 Claims
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1. A method of automatically recognizing speech utterances, the method comprising the steps of:
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evaluating a recognition result using an initial confidence measure and a plurality of second confidence measures determined for a recognition result, determining a resulting confidence measure by combining the initial confidence measure and the plurality of second confidence measures, wherein the determining step includes, determining parameters for the combining of the second confidence measures using a minimization of a cross-entropy-error measure. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification