发明名称 |
DEVICE FOR SPEAKER VERIFICATION |
摘要 |
The device obtains several characteristic parameters from a standard sentence said by a speaker and compares them with average parameters of the same speaker stored in an internal memory and previously calculated. According to the comparison, it obtains a probability value that the sentence spoken belongs to that speaker and compares the value with a threshold normalized to the average parameter variance by a threshold calculation circuit. If the threshold is overcome, the device considers the speaker verified. A circuit determines the real instants of sentence beginning and end using a noise-adaptive threshold in order to limit between these two instants the time interval over which characteristic parameters are to be calculated. A circuit aligns as to time the characteristic parameters just calculated to the parameters of a reference sentence, obtaining standard lengths of the sounds composing the sentence spoken. A variable probability threshold is controlled by the standard deviations of the histogram of the average of the characteristic parameter vectors. |
申请公布号 |
DE3470240(D1) |
申请公布日期 |
1988.05.05 |
申请号 |
DE19843470240 |
申请日期 |
1984.12.17 |
申请人 |
CSELT CENTRO STUDI E LABORATORI TELECOMUNICAZIONI S.P.A. |
发明人 |
CAVAZZA, MICHELE;CIARAMELLA, ALBERTO |
分类号 |
G10L11/00;G10L15/00;G10L15/10;G10L17/00;(IPC1-7):G10L5/06 |
主分类号 |
G10L11/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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