发明名称 |
PERCEPTUAL HARMONIC CEPSTRAL COEFFICIENTS AS THE FRONT-END FOR SPEECH RECOGNITION |
摘要 |
Pitch estimation and classification into voiced, unvoiced and transitional speech were performed by a spectro-temporal auto-correlation technique. A peak picking formula was then employed. A weighting function was then applied to the power spectrum. The harmonics weighted power spectrum underwent mel-scaled band-pass filtering, and the log-energy of the filter's output was discrete cosine transformed to produce cepstral coefficients. A within-filter cubic-root amplitude compression was applied to reduce amplitude variation without compromise of the gain invariance properties.
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申请公布号 |
WO0229782(A1) |
申请公布日期 |
2002.04.11 |
申请号 |
WO2001US30909 |
申请日期 |
2001.10.02 |
申请人 |
THE REGENTS OF THE UNIVERSITY OF CALIFORNIA;ROSE, KENNETH;GU, LIANG |
发明人 |
ROSE, KENNETH;GU, LIANG |
分类号 |
G10L11/04;G10L11/06;G10L15/02;G10L19/06;(IPC1-7):G10L11/06 |
主分类号 |
G10L11/04 |
代理机构 |
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地址 |
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