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:
Apr. 03, 2012
Filed:
Mar. 20, 2007
Kosuke Sakamoto, Utsunomiya, JP;
Toshio Inoue, Tochigi-ken, JP;
Akira Takahashi, Tochigi-ken, JP;
Yasunori Kobayashi, Utsunomiya, JP;
Kosuke Sakamoto, Utsunomiya, JP;
Toshio Inoue, Tochigi-ken, JP;
Akira Takahashi, Tochigi-ken, JP;
Yasunori Kobayashi, Utsunomiya, JP;
Honda Motor Co., Ltd., Tokyo, JP;
Abstract
An active noise control system includes a filter coefficient updating unit including an imaginary term estimator. The imaginary term estimator estimates an imaginary term Ie from a real term Re of an error signal e supplied from a microphone. The filter coefficient updating unit updates a filter coefficient W of an adaptive filter based on the imaginary term Ie, the real term Re, and a corrective signal supplied from a reference signal corrector. The filter coefficient updating unit updates the filter coefficient W successively in respective sampling periods.