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Multichannel speech enhancement systems are capable of extracting desired signals from noisy microphone signals. Optimal spatial filters used for source extraction often require knowledge of the relative transfer functions (RTFs) which describe the coupling among the microphone signals as a response to a signal originating from the location of the desired source. The performance of the speech enhancement...
Informed spatial filters (ISFs) have been shown to provide high-quality speech acquisition in dynamic scenarios due to their ability to almost instantaneously adapt the filter coefficients based on the statistics of the desired and undesired signals. In most contributions, ISFs have been implemented in closed form as minimum variance distortionless response (MVDR), or minimum-mean-squared error filters...
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