Acoustic keystroke transient canceler for speech communication terminals using a semi-blind adaptive filter model
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United States of America Patent
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Jan 30, 2018
Grant Date -
Jul 6, 2017
app pub date -
Dec 30, 2015
filing date -
Dec 30, 2015
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Abstract
Provided are methods and systems for acoustic keystroke transient cancellation/suppression for user communication devices using a semi-blind adaptive filter model. The methods and systems are designed to overcome existing problems in transient noise suppression by taking into account some less-defective signal as side information on the transients and also accounting for acoustic signal propagation, including the reverberation effects, using dynamic models. The methods and systems take advantage of a synchronous reference microphone embedded in the keyboard of the user device, and utilize an adaptive filtering approach exploiting the knowledge of this keybed microphone signal.
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