Abstract
AbstractGenerally, keyword spotting is based on the phonemic information. Consequently, if the input speech contains a phoneme sequence which is similar to the keyword, it may be incorrectly detected as the keyword, even though the prosodic pattern such as accent differs greatly. In order to avoid such a false alarm, this paper presents a method where not only the phonemic information, but also the F0 information, are both used to determine the likelihood of the input speech as the keyword. The F0 contour of the keyword is registered beforehand as the template. The F0 contour of the input speech and the template are compared by DP matching, and the likelihood as the keyword is evaluated by the obtained dissimilarity and the phonemic likelihood. Based on an experiment using news broadcasts, it is seen that the false alarm rate is reduced by 30 to 50%, for the equivalent detection rate. © 2001 Scripta Technica, Syst Comp Jpn, 32(7): 52–61, 2001
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