| 摘要 |
PROBLEM TO BE SOLVED: To enhance a speech recognition performance by correcting individual difference of input speech even when a speaker who utters the speech is altered. SOLUTION: This speech recognition device is provided with a feature extracting part 201 which extracts the acoustic feature of the input voice, a frequency converting part 202 which converts a frequency using a prescribed frequency converting coefficient, a converting coefficient setting part 203 which gives a converting coefficient to the frequency converting part 202, a degree of similarity or distance calculating part 204 which calculates the degree of similarity or distance using the feature amount after the conversion and the acoustic feature amount of a standard phoneme model, a conversion condition deciding part 207 which selects and decides the phoneme of the maximum likelihood and an optimum frequency axis converting coefficient and a speech recognition processing part 209 which makes the feature amount after the conversion from the part 202 an input. The part 209 performs a recognition processing using the condition decided by the part 207, the frequency converting coefficient which is selected by the part 203 and the feature amount after the conversion whose frequency is converted in the part 202. Thus, the speech recognition device can raise the speed recognition performance. COPYRIGHT: (C)2004,JPO
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