| 摘要 |
PROBLEM TO BE SOLVED: To provide a voice recognition apparatus capable of efficiently reducing the number of cycles of output probability calculation without negatively affecting voice recognition performance by combining a method based on beam search and a method based on a reference frame. SOLUTION: A sound processing section 101, a voice interval detection section 102, a dictionary section 103, a collating section 104, a search object selection section 105, a storing section 106 and a determination section 107, are provided. Processing comprises the steps of: selecting a search range based on the beam search; setting and storing the reference frame; storing the output probability in a transition path; and determining whether the output probability in the transition path is stored or not. The search range is selected based on the beam search, and the output probability of the transition path is calculated only once for an interval from setting time to updating time of the reference frame, and a value of the calculation is stored, and when the output probability of the transition path is stored in the following frames, the stored value is set as an approximation value of the output probability. Thereby, the frequency of the output probability calculation is reduced. COPYRIGHT: (C)2008,JPO&INPIT
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