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:
Mar. 12, 2019
Filed:
Jul. 09, 2015
Applicant:
Panasonic Intellectual Property Management Co., Ltd., Osaka, JP;
Inventors:
Masaya Hanazono, Osaka, JP;
Wakio Yamada, Hyogo, JP;
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F24C 15/20 (2006.01); G10K 11/178 (2006.01);
U.S. Cl.
CPC ...
G10K 11/178 (2013.01); F24C 15/20 (2013.01); F24C 15/2042 (2013.01); G10K 11/17853 (2018.01); G10K 11/17881 (2018.01); G10K 2210/105 (2013.01); G10K 2210/3016 (2013.01); G10K 2210/3026 (2013.01); G10K 2210/3027 (2013.01); G10K 2210/3028 (2013.01);
Abstract
A signal processing device includes a coefficient updater configured to calculate a filter coefficient based on a reference signal, an error signal, and an update parameter to set the filter coefficient in a noise cancelling filter. A parameter adjuster adjusts the update parameter according to fluctuation of the reference signal produced from an output of a reference microphone.