| 摘要 |
PROBLEM TO BE SOLVED: To recognize a speech, using either of a speaker adapted acoustic model or a versatile acoustic model, in response to a speech recognition request executed frequency, when adapting the acoustic model to a speaker in each group. SOLUTION: A speech recognizer includes: a usage frequency extraction means 60 for extracting a user ID of a user whose speech recognition request executed frequency is a predetermined threshold value or more, from an access information database 32 for storing access information including a speech recognition request and the user ID; a high-frequency user grouping means 50 for grouping the users, based on the extracted user IDs; a speaker adaptation processing means 70 for performing speaker adaptation processing of the acoustic model for each group; and a speech recognition processing means 20 for recognizing the speech of the user corresponding to the user ID, using the acoustic model to which the speaker adaptation processing is performed for every group. COPYRIGHT: (C)2010,JPO&INPIT
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