SPEECH RECOGNITION DEVICE, SPEECH RECOGNITION METHOD, AND SPEECH RECOGNITION PROGRAM

WIPO Patent Application WO/2016/147292

A1

A speech recognition device provided with: a speech recognition unit (1) for carrying out speech recognition of input speech using a language model for which learning has been carried out for set recognition targets and an acoustic model and for calculating a recognition score for recognition results obtained; an unknown word number calculation unit (4) for calculating the number of unknown words included in the recognition results on the basis of N-gram probability for the language model; a keyword accumulation unit (6) for accumulating keywords related to the recognition target; a keyword length calculation unit (5) for calculating keyword length showing the length of a keyword when an accumulated keyword is included in the recognition results; and a score recalculation unit (7) for recalculating the recognition score on the basis of the calculated number of unknown words and the calculated keyword length and for outputting the recognition results on the basis of the recalculated recognition score.

NARITA TOMOHIRO (JP)

PCT/JP2015/057664

September 22, 2016

March 16, 2015

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MITSUBISHI ELECTRIC CORP (JP)

G10L15/10; G10L15/197

JP2011164192A	2011-08-25
JP2007072393A	2007-03-22
JP2009098201A	2009-05-07

Y.FUJITA ET AL.: "Out-of-Task Utterance Detection Based on Bag-of-Words Using Automatic Speech Recognition Results", 2011 ASIA-PACIFIC SIGNAL AND INFORMATION PROCESSING ASSOCIATION ANNUAL SUMMIT AND CONFERENCE, 18 October 2011 (2011-10-18), XP055312534

TAZAWA, Hideaki et al. (JP)
Hideaki Tazawa (JP)

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