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:
May. 23, 2017
Filed:
Aug. 23, 2013
Sharp Kabushiki Kaisha, Osaka-shi, Osaka, JP;
Junsei Sato, Osaka, JP;
Hisao Hattori, Osaka, JP;
Sharp Kabushiki Kaisha, Sakai, JP;
Abstract
An audio signal playback device includes a conversion unit that performs discrete Fourier transform on each of 2 channel audio signals obtained from a multi-channel input audio signal, a correlation signal extraction unit that, disregarding a direct current component, extracts a correlation signal from the 2 channel audio signals that result from the discrete Fourier transform, and additionally pulls a correlation signal in a lower frequency than a predetermined frequency fout of the correlation signal, and an output unit that allocates the pulled-out correlation signal to a virtual sound source in such a manner that a time difference in a sound output between adjacent speakers falls within a range of 2Δx/c (where, Δx is a distance between the adjacent speakers, and c is the speed of sound), and outputs a result of the allocation from one portion or all portions of the speaker group.