Sixth European Conference on Speech Communication and Technology

Budapest, Hungary
September 5-9, 1999

Improving Rejection with Semantic Slot-Based Confidence Scores

Eric I. Chang

Nuance Communications, Menlo Park, CA, USA

This paper introduces a new confidence scoring mechanism which takes advantage of the semantic parsing provided by a natural language understanding system. As a result, different segments of the user input which fill individual semantic slots are identified and individual semantic slot confidence scores are generated. With slot-based confidence scores, each individual slot receives a confidence score generated by combining the confidence scores of the individual words which fill that particular slot. With judicious use of confidence scores for individual slots, better rejection and more natural interaction with the system are achieved.

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Bibliographic reference.  Chang, Eric I. (1999): "Improving rejection with semantic slot-based confidence scores", In EUROSPEECH'99, 271-274.