| 摘要 |
PROBLEM TO BE SOLVED: To provide a speaker adaptation device that has high generalization capability and speaker-adapts a speaker-independent acoustic model with a small amount of adaptation data. SOLUTION: This speaker adaptation device includes a storage device for storing a transformation matrix for speaker adaptation and data for speaker adaptation, an acoustic model transforming section 150 for applying the transformation matrix to the speaker-independent acoustic model and calculating the speaker adaptation acoustic model, a frame selection section 142 for selecting a frame where the posteriori probability of correct answer data of the data for speaker adaptation exists in a predetermined range, objective function calculation sections 144 and 146 for calculating the value of the objective function of soft margin estimation using the selected frame, an updating section 148 for updating the transformation matrix so as to minimize the value of the objective function using the optimization algorithm, and a repeat control section 154 that uses the updated transformation matrix to repeatedly operate the acoustic model transforming section 150, frame selection section 142, objective function calculation sections 144 and 146, and updating section 150 until the completion condition is established. COPYRIGHT: (C)2011,JPO&INPIT
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