Method and apparatus for wind noise detection

摘要

A method of processing digitized microphone signal data in order to detect wind noise. First and second sets of signal samples are obtained simultaneously from two microphones. A first number of samples in the first set which are greater than a first predefined comparison threshold is determined. A second number of samples in the first set which are less than the first predefined comparison threshold is determined. A third number of samples in the second set which are greater than a second predefined comparison threshold is determined. A fourth number of samples in the second set which are less than the second predefined comparison threshold is determined. If the first number and second number differ from the third number and fourth number to an extent which exceeds a predefined detection threshold, e.g. as determined by a Chi-squared test, then an indication that wind noise is present is output.

主权项

1. A method of processing digitized microphone signal data for detecting wind noise, the method comprising:
obtaining from a first microphone a first set of signal samples; obtaining from a second microphone a second set of signal samples arising substantially contemporaneously with the first set; determining a first number of samples in the first set which are greater than a first predefined comparison threshold, and determining a second number of samples in the first set which are less than the first predefined comparison threshold; determining a third number of samples in the second set which are greater than a second predefined comparison threshold, and determining a fourth number of samples in the second set which are less than the second predefined comparison threshold; and determining whether the first number and second number differ from the third number and fourth number to an extent which exceeds a predefined detection threshold, and if so outputting an indication that wind noise is present.