US 11,948,546 B2
Feed-forward adaptive noise-canceling with dynamic filter selection based on classifying acoustic environment
Samuel P. Ebenezer, Gilbert, AZ (US); and Rachid Kerkoud, Gilbert, AZ (US)
Assigned to CIRRUS LOGIC, INC., Austin, TX (US)
Filed by CIRRUS LOGIC INTERNATIONAL SEMICONDUCTOR LTD., Edinburgh (GB)
Filed on Jul. 6, 2022, as Appl. No. 17/858,771.
Prior Publication US 2024/0013765 A1, Jan. 11, 2024
Int. Cl. G10K 11/178 (2006.01); H04R 1/10 (2006.01)
CPC G10K 11/17854 (2018.01) [G10K 11/17823 (2018.01); G10K 11/17825 (2018.01); G10K 11/17881 (2018.01); H04R 1/1083 (2013.01); G10K 2210/1081 (2013.01); G10K 2210/3026 (2013.01); G10K 2210/3027 (2013.01); G10K 2210/3028 (2013.01); G10K 2210/3044 (2013.01); H04R 2460/01 (2013.01)] 36 Claims
OG exemplary drawing
 
1. An adaptive noise-canceling system for generating an anti-noise signal from a noise reference signal, the adaptive noise-canceling system comprising:
a feed-forward filter for filtering the noise reference signal to produce the anti-noise signal, wherein the feed-forward filter has a first response controlled by a set of first coefficients;
a measurement subsystem for measuring a characteristic of an acoustic environment of the adaptive noise-canceling system;
a classifier for classifying the characteristic of the acoustic environment of the adaptive noise-canceling system by analyzing an output of the measurement subsystem; and
a controller for providing the set of first coefficients to the feed-forward filter in conformity with an output of the classifier.