Signal processor and method therefor

摘要

A signal processor is configured to suppress a noise component contained in an input voice signal by means of coherence filtering. The processor includes an iterative coherence filtering function for repeatedly conducting the coherence filtering on a signal, which has been subjected to the coherence filtering and then input to the processor again as input signal, and performs the iteration processing on the signal obtained by the coherence filtering until a condition for terminating the iteration is satisfied, thereby preventing musical noise from generating while a noise component is suppressed.

主权项

1. A signal processor, comprising:
a filtering processor configured to iteratively filter an input signal in a frequency domain containing a voice component and a noise component; and
an iteration controller configured to control the iterations of the filtering of the filtering processor until a characteristic of coherence filter coefficients thereof satisfies a condition for terminating the iterations to thereby suppress the noise component in a filtered signal that is filtered by the filtering processor.