发明名称 |
COMBINING FREQUENCY WARPING AND SPECTRAL SHAPING IN HMM BASED SPEECH RECOGNITION |
摘要 |
Frequency warping approaches to speaker normalization have been proposed and evaluated on various speech recognition tasks. In all cases, frequency warping was found to significantly improve recognition performance by reducing the mismatch between test utterances presented to the recognizer and the speaker independent HMM model. This invention relates to a procedure which compensates utterances by simultaneously scaling the frequency axis and reshaping the spectral energy contour. This procedure is shown to reduce the error rate in a telephone based connected digit recognition task by 30%.
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申请公布号 |
CA2227982(C) |
申请公布日期 |
2002.09.17 |
申请号 |
CA19982227982 |
申请日期 |
1998.01.26 |
申请人 |
AT&T CORP. |
发明人 |
ROSE, RICHARD CAMERON;POTAMIANOS, ALEXANDROS |
分类号 |
G10L15/06;(IPC1-7):G10L7/08;G10L3/02 |
主分类号 |
G10L15/06 |
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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