Noise reduction in multi-microphone systems
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United States of America Patent
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Nov 5, 2019
Grant Date -
Apr 23, 2015
app pub date -
Oct 16, 2014
filing date -
Oct 21, 2013
priority date (Note) -
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Abstract
An apparatus comprising: an input configured to receive at least three microphone audio signals, the at least three microphone audio signals comprising at least two near microphone audio signals generated by at least two near microphones located near to an desired audio source and at least one farmic audio signal generated by a farmic located further from the desired audio source; a first interference canceller module configured to generate a first processed audio signal based on a first selection from the near microphone audio signals; at least one further interference canceller module configured to generate at least one further processed audio signal based on at least one further selection from the at least three microphone audio signals; a comparator configured to determine from the first processed audio signal and the at least one further processed audio signal the audio signal with greater noise suppression.
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