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. 03, 2017
Filed:
Jan. 31, 2013
Panasonic Corporation, Kadoma-shi, Osaka, JP;
Kazuhiro Nakamura, Kanagawa, JP;
PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD., Osaka-shi, JP;
Abstract
Provided is a surround component generation device capable of generating surround components for multichannel reproduction based on two-channel audio signals with a small amount of arithmetic operation. The surround component generation device includes: multipliers for changing amplitudes of audio input signals; subtractors for subtracting outputs of the multipliers from the input signals; coefficient updaters for updating coefficients of the multipliers; subtractors for generating surround components based on the input signals and the output signals of the multipliers; output switches for switching and outputting the output signals of the subtractors; and output switching controllers for controlling the output switches. Each of the coefficient updaters updates the coefficient of the multiplier based on the output of the subtractor, and each of the output switching controllers switches the output switch based on the coefficient updated by the coefficient updater.