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:
Dec. 23, 1997
Filed:
Aug. 05, 1996
Tetsuya Wakui, Yokohama, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
An audio processing apparatus is arranged to be capable of attenuating only an unnecessary wind noise without cutting off the low frequency part of sounds picked up. In the apparatus, a first low frequency band signal and a first high frequency band signal are extracted from a signal obtained by subtracting a delayed right-side audio signal from a received left-side audio signal. A second low frequency band signal and a second high frequency band signal are extracted from a signal obtained by subtracting a delayed left-side audio signal from a received right-side audio signal. An addition signal is formed by adding together the extracted first low frequency band signal and the extracted second low frequency band signal. The extracted first low frequency band signal and the addition signal are added together in an arbitrary variable addition ratio to obtain a first variable addition signal. The extracted second low frequency band signal and the addition signal are also added together in an arbitrary variable addition ratio to obtain a second variable addition signal. The extracted first high frequency band signal is outputted with the first variable addition signal added thereto, while the extracted second high frequency band signal is outputted with the second variable addition signal added thereto.