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. 06, 2011
Filed:
Oct. 03, 2006
Shuji Miyasaka, Osaka, JP;
Yoshiaki Takagi, Kanagawa, JP;
Takeshi Norimatsu, Hyogo, JP;
Akihisa Kawamura, Osaka, JP;
Kojiro Ono, Osaka, JP;
Kok Seng Chong, Singapore, SG;
Shuji Miyasaka, Osaka, JP;
Yoshiaki Takagi, Kanagawa, JP;
Takeshi Norimatsu, Hyogo, JP;
Akihisa Kawamura, Osaka, JP;
Kojiro Ono, Osaka, JP;
Kok Seng Chong, Singapore, SG;
Panasonic Corporation, Osaka, JP;
Abstract
To provide an acoustic signal processing apparatus which can reduce the amount of calculation in matrix arithmetic. An acoustic signal processing apparatus converts down-mixed acoustic signals of NI channels to acoustic signals of NO channels, where NO>NI. The acoustic signal processing apparatus includes: a first matrix arithmetic unit for performing arithmetic on a matrix with K rows and NI columns, where NO>K≧NI, for the down-mixed acoustic signals of the NI channels, and outputting K signals obtained after the matrix arithmetic; K decorrelation units for generating signals incoherent, in terms of time characteristics, with the signals obtained after the matrix arithmetic, while maintaining frequency characteristics of the signals obtained after the matrix arithmetic; and a second matrix arithmetic unit for performing arithmetic on a matrix with NO rows and (NI+K) columns for the down-mixed acoustic signals of the NI channels and for the K incoherent signals, and outputting the acoustic signals of the NO channels.