TY - GEN
T1 - Recognition of utterances with grammatical mistakes based on optimization of language model towards interactive CALL systems
AU - Anzai, Takuya
AU - Ito, Akinori
PY - 2012
Y1 - 2012
N2 - To realize a voice-interactive CALL system, it is necessary to recognize the learner's utterance correctly including the grammatical mistakes. In this paper, we proposed methods for improving recognition accuracy of speech with grammatical mistakes. The proposed method is based on the method that uses n-gram model trained from sentences that are generated using grammatical error rules. We introduced two improvements to the previous method: one is the utterance discrimination to avoid introducing errors into correct utterances, and the other one is optimization of language model where probability of grammatical mistakes in the generated training text is optimized using the score of utterance discrimination. As a result, we obtained 0.92 point improvement, which is 12% error reduction.
AB - To realize a voice-interactive CALL system, it is necessary to recognize the learner's utterance correctly including the grammatical mistakes. In this paper, we proposed methods for improving recognition accuracy of speech with grammatical mistakes. The proposed method is based on the method that uses n-gram model trained from sentences that are generated using grammatical error rules. We introduced two improvements to the previous method: one is the utterance discrimination to avoid introducing errors into correct utterances, and the other one is optimization of language model where probability of grammatical mistakes in the generated training text is optimized using the score of utterance discrimination. As a result, we obtained 0.92 point improvement, which is 12% error reduction.
KW - grammatical mistakes
KW - interactive CALL system
KW - language model
KW - speech recognition
UR - http://www.scopus.com/inward/record.url?scp=84874407578&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84874407578&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:84874407578
SN - 9780615700502
T3 - 2012 Conference Handbook - Asia-Pacific Signal and Information Processing Association Annual Summit and Conference, APSIPA ASC 2012
BT - 2012 Conference Handbook - Asia-Pacific Signal and Information Processing Association Annual Summit and Conference, APSIPA ASC 2012
T2 - 2012 4th Asia-Pacific Signal and Information Processing Association Annual Summit and Conference, APSIPA ASC 2012
Y2 - 3 December 2012 through 6 December 2012
ER -