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:
Feb. 19, 2013
Filed:
Apr. 12, 2007
Kiyoshi Nishiyama, Morioka, JP;
Kiyoshi Nishiyama, Morioka, JP;
Incorporated National University Iwate University, Morioka-Shi, JP;
Abstract
A large-scale sound system or communication system is numerically and stably identified. When an input signal is represented by the M(≦N)-th order AR model, high-speed Hfiltering can be performed with a computational complex 3N+O(M). A processing section determines the initial state of a recursive equation (S), sets Caccording to an input u(S), determines a variable recursively (S), updates a matrix G, calculates an auxiliary gain matrix K(S), divides it (S), calculates a variable Dand a backward prediction error η(S), calculate a gain matrix K(S), and updates a filter equation of a high-speed Hfilter (S). To reduce the computational complexity, K(:, 1)/(1+&ggr;HK(:, 1)) is directly used as the filter gain K.