| 摘要 |
The invention relates to methods and apparatus used in digital signal processing. The method, comprises: receiving, by a processor coupled to a plurality of sensors (e.g. microphones), first and second noisy input signals 202, 204, each of the noisy signals being from the plurality of sensors; determining an estimated noise correlation statistic 212 between the first and second input signals; and executing a learning algorithm in an adaptive blocking matrix that estimates an inter-sensor signal model 214 between the first and second input signals based on the estimated noise correlation statistic such that a noise correlation is maintained between an input to an adaptive noise canceller (ANC, 130) module and an output of the blocking matrix. The inter-sensor signal model may be estimated using a gradient decent total least squares (GrTLS) algorithm. Further, spatial pre-whitening may be applied in the adaptive blocking matrix to further improve noise reduction. The method might find application in adaptive beam forming (110). |
