| 摘要 |
A method and system for user authentication based on speech recognition an d knowledge questions. The method comprises receiving a speech recognition result derived from ASR processing of a received utterance. A reference information element is obtained for the utterance. Then, the method determines at least one similarity metric indicative of a degree of similarity between the speech recognition result and the reference information element. A feature vector is determined from the at least one similarity metric, and a score is computed based on the element s of the feature vector. A classifier may be used to process the elements of the feature vector, with the classifier having been trained to tend to produce higher scores whe n processing training feature vectors derived from utterances known to convey associated reference information elements than when processing training feature vectors derived from utterances known not to convey said associated referenc e information elements.
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