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:
Aug. 26, 2014
Filed:
Mar. 29, 2011
Yohei Kishi, Kawasaki, JP;
Masanao Suzuki, Kawasaki, JP;
Miyuki Shirakawa, Fukuoka, JP;
Yoshiteru Tsuchinaga, Fukuoka, JP;
Yohei Kishi, Kawasaki, JP;
Masanao Suzuki, Kawasaki, JP;
Miyuki Shirakawa, Fukuoka, JP;
Yoshiteru Tsuchinaga, Fukuoka, JP;
Fujitsu Limited, Kawasaki-shi, JP;
Abstract
A downmixing device includes: a matrix conversion unit configured to perform a matrix operation for an input signal; a rotation correction unit configured to rotate an output signal of the matrix conversion unit; a spatial information extraction unit configured to extract spatial information from the output signal of the rotation correction unit; and an error calculation unit configured to calculate an error amount of the matrix operation result for the input signal by performing a matrix operation for the output signal of the rotation correction unit and the spatial information extracted by the spatial information extraction unit using a matrix that is inverse to the matrix used for the matrix operation by the matrix conversion unit.