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Relationship among Recognition Rate, Rejection Rate and False Alarm Rate in a Spoken Word Recognition System

Atsuhiko KAI, Seiichi NAKAGAWA

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Summary :

Detection of an unknown word or non-vocabulary word uttered by the user is necessary in realizing a practical spoken language user-interface. This paper describes the evaluation of an unknown word processing method for a subword unit based spoken word recognizer. We have assessed the relationship between the word recognition accuracy of a system and the detection rate of unknown words both by simulation and by experiment of the unknown word processing method. We found that the resultant detection accuracies using the unknown word processing are significantly influenced by the original word recognition accuracy while the degree of such effect depends on the vocabulary size.

Publication
IEICE TRANSACTIONS on Information Vol.E78-D No.6 pp.698-704
Publication Date
1995/06/25
Publicized
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Type of Manuscript
Special Section PAPER (Special Issue on Spoken Language Processing)
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