| 摘要 |
PROBLEM TO BE SOLVED: To provide an unknown speech detecting device for voice recognition that can detect an unknown speech with high accuracy by using not only a single decision scale, but also a plurality of decision scales in combination. SOLUTION: In addition to collation using word patterns of a vocabulary registered in a recognition dictionary, the unknown speech detecting device for voice recognition performs collation, using subword connection models, in which chain probability of subwords is taken into consideration in the stage of voice recognition to find a plurality of unknown speech detection scales from collation results, and takes those results into consideration to decide an unknown speech. COPYRIGHT: (C)2004,JPO
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