发明名称 |
Subtractive cancellation of harmonic noise |
摘要 |
A common problem in audio processing is that a useful signal is disturbed by one or more sinusoidal noises that should be suppressed. One embodiment of the invention provides a method of canceling a sinusoidal disturbance of unknown frequency in a disturbed useful signal. The method comprises the steps of estimating parameters of the sinusoidal disturbance including amplitude, phase and frequency; generating a reference signal on the basis of the estimated parameters; and subtracting the reference signal from the disturbed useful signal. According to one embodiment of the present invention, the estimation is performed by an Extended Kalman filter.
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申请公布号 |
US2005276363(A1) |
申请公布日期 |
2005.12.15 |
申请号 |
US20050138243 |
申请日期 |
2005.05.25 |
申请人 |
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发明人 |
JOUBLIN FRANK;HECKMANN MARTIN;SCHOLLING BJORN |
分类号 |
G10L21/02;G10L21/0208;H04B1/10;(IPC1-7):H04B1/10 |
主分类号 |
G10L21/02 |
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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