Patent ID: 8280065
Filing Date: 2012-10-02
Classification: G10K,H03H

Abstract:
1. A system for active noise cancellation, comprising: an analog active noise cancellation (ANC) system for performing an active noise cancellation to a primary signal in a time-domain, the primary signal being associated with an acoustic signal and comprising noise; a first analysis filter bank for transferring a reference signal in the time-domain into a plurality of subband reference signals in a frequency-domain, the reference signal being associated with the noise; a second analysis filter bank for transferring the primary signal in the time-domain into a plurality of subband primary signals in the frequency-domain; a subband processing module for processing the plurality of subband reference signals, the plurality of subband primary signals or a combination thereof, including detecting the analog ANC system at brink of instability, and adjusting one or more parameters of the analog ANC system based on the processing, the subband processing module comprising: a synthesis filter bank for transferring the plurality of subband output signals to a time-domain output signal.