Voice Activity Detector (VAD) -Based Multiple-Microphone Acoustic Noise Suppression
AssigneeAliphCom
InventorsGregory C. BURNETT, Eric F. BREITFELLER
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Abstract
Acoustic noise suppression is provided in multiple-microphone systems using Voice Activity Detectors (VAD). A host system receives acoustic signals via multiple microphones. The system also receives information on the vibration of human tissue associated with human voicing activity via the VAD. In response, the system generates a transfer function representative of the received acoustic signals upon determining that voicing information is absent from the received acoustic signals during at least one specified period of time. The system removes noise from the received acoustic signals using the transfer function, thereby producing a denoised acoustic data stream.
Claims12
A method for removing noise from acoustic signals, comprising:
- receiving a plurality of acoustic signals;
- receiving information on the vibration of human tissue associated with human voicing activity;
- generating at least one first transfer function representative of the plurality of acoustic signals upon determining that voicing information is absent from the plurality of acoustic signals for at least one specified period of time;
- and
- removing noise from the plurality of acoustic signals using the first transfer function to produce at least one denoised acoustic data stream.
12-44. (canceled)
Dependencies are inferred from the claim text.