发明名称 |
Cancellation of non-stationary interfering signals for speech recognition |
摘要 |
System for cancellation of non-stationary interfering signals, particularly for use for mitigating effects of such interferers produced by in-car entertainment (ECAD) devices for speech recognition applications. The system spectrally analyses signals output by the ECAD before and after they are passed through an in-car acoustic channel. A model of the acoustic channel is built by the system's algorithm. For speech recognition the model is spectrally subtracted from a signal received at a microphone in order to recover a wanted speech signal. The acoustic channel model is built by estimating frequency domain acoustic transfer functions between each loudspeaker used by the ECAD and the microphone. |
申请公布号 |
AU4590400(A) |
申请公布日期 |
2000.11.21 |
申请号 |
AU20000045904 |
申请日期 |
2000.05.05 |
申请人 |
IMAGINATION TECHNOLOGIES LIMITED |
发明人 |
MICHAEL JOHN CAREY;GRAHAM DAVID TATTERSALL |
分类号 |
G10L15/20;G10L21/0208;H04R3/02 |
主分类号 |
G10L15/20 |
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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