| 摘要 |
PROBLEM TO BE SOLVED: To solve a common problem in audio processing that a useful signal (8) is disturbed by one or more sinusoidal noises (9) that should be suppressed. SOLUTION: The method for canceling a sinusoidal disturbance (9) of unknown frequency in a disturbed useful signal (1) comprises the steps of: estimating (2) the three sinusoidal parameters of the disturbance (9), i.e., amplitude, phase and frequency; generating (4) a reference signal (5) according to the estimated parameters; and subtracting (6) the reference signal (5) from the disturbed information bearing signal (1). The estimation is performed by an Extended Kalman filter. COPYRIGHT: (C)2006,JPO&NCIPI
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