Method and system for identifying audible noise as wind...

Details Method and system for identifying audible noise as wind... Method and system for identifying audible noise as wind...

2007-09-27

2011-11-22

Moffat, Jonathan Teixeira (Department: 2857)

Data processing: measuring, calibrating, or testing

Measurement system

Measured signal processing

C702S189000, C381S094100, C381S071100, C381S056000, C381S058000, C381S317000

Reexamination Certificate

active

08065115

ABSTRACT:
A method and system for detecting wind noise are adapted to determine whether two of a plurality of sound signals acquired by a plurality of sound receiving units include wind noise. The method includes the following steps: (a) transforming the two sound signals to their corresponding digitized sound signals including a plurality of sound frames; (b) calculating a correlation coefficient of each pair of the corresponding sound frames from the two digitized sound signals; (c) subtracting one of the digitized sound signals from the other, and transforming the resultant digitized sound signal to frequency domain; (d) selecting a frequency bin in frequency domain for each of the sound frames to serve as a frequency boundary, and calculating a dB difference, a low-frequency energy decay factor, and a low-frequency ripple number of each of the sound frames according to the frequency boundary; and (e) determining whether the correlation coefficient, the dB difference, the low-frequency energy decay factor, and the low-frequency ripple number of a respective sound frame comply with a predetermined determination rule, the two sound signals being determined to include wind noise if affirmative.

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