公开(公告)号：US09881630B2

公开(公告)日：2018-01-30

申请号：US14984373

申请日：2015-12-30

Applicant: GOOGLE INC.

Inventor： Herbert Buchner ,  Simon J. Godsill ,  Jan Skoglund

IPC: G10L21/02 ,  G10L19/26 ,  G10L21/0224 ,  G10L21/028 ,  G10L21/0216 ,  G10L21/0208 ,  G10L21/0232

CPC classification number: G10L19/26 ,  G10L21/0208 ,  G10L21/0216 ,  G10L21/0224 ,  G10L21/0232 ,  G10L21/028 ,  G10L2021/02161 ,  G10L2021/02165 ,  H04R2410/05

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.