The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 08, 2019
Filed:
Jun. 19, 2014
Applicants:
Creative Technology Ltd, Singapore, SG;
Steve Verity, Santa Clara, CA (US);
Inventors:
River Yuan, San Jose, CA (US);
Steve Verity, Santa Clara, CA (US);
Ian Minett, San Jose, CA (US);
Robert Ridder, Santa Cruz, CA (US);
Assignee:
Creative Technology Ltd, Singapore, SG;
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
H04R 3/02 (2006.01); H04B 15/00 (2006.01); H04R 29/00 (2006.01); H04B 1/715 (2011.01); H04W 40/12 (2009.01); G10L 19/02 (2013.01); H04M 9/08 (2006.01);
U.S. Cl.
CPC ...
H04R 29/007 (2013.01); G10L 19/0212 (2013.01); H04B 1/715 (2013.01); H04M 9/082 (2013.01); H04R 3/02 (2013.01); H04W 40/12 (2013.01); H04R 2227/001 (2013.01); H04R 2410/07 (2013.01);
Abstract
In embodiments of this invention howling sounds are removed without disturbing speech and music. Microphone signals are converted to the frequency domain where howling frequencies are detected and estimated using howling to noise ratios. A notch filter adaptively designed for the howling frequency is applied to remove the howling.