Title:
入力信号推定方法、及び装置、入力信号推定プログラムならびにその記録媒体
Document Type and Number:
Japanese Patent JP3986457
Kind Code:
B2
Abstract:
To estimate an input signal with high accuracy even when the input signal is a signal generated in an AR (autoregressive) process in a one-input and N-output linear system.
N sensor output signals are delayed by one sample (S2), an autocorrelation matrix RAof the N delayed signals is found (S3-1), and its pseudo inverse matrix RA-is found; and a cross-correlation matrix RCof the N output signals and N delayed signals is found (S3-3), a product matrix W of RA-and RCis found (S3-4), and its 1st row includes front-stage transfer functions w1to wNto find a characteristic polynomial cw(z) of W. Further, inverse elements of a polynomial in cw(z) equivalent to a denominator polynomial in the AR process to obtain a rear-stage transfer function wF. The N delayed signals are filtered with w1to wN(S4) and summed up; and the addition signal is subtracted from a 1st sensor output signal and the subtraction signal is filtered with wF.
COPYRIGHT: (C)2005,JPO&NCIPI
Inventors:
Masato Miyoshi
Application Number:
JP2003090922A
Publication Date:
October 03, 2007
Filing Date:
March 28, 2003
Assignee:
Nippon Telegraph and Telephone Corporation
International Classes:
G10L19/06; H04R3/00; G10L21/0208; G10L21/0272
Domestic Patent References:
| JP10257582A | | | | |
| JP9016557A | | | | |
| JP9247788A | | | | |
Other References:
水島昌英 他,"室内伝達関数の高次項消去による残響歪低減法",日本音響学会平成9年度春季研究発表会講演論文集-I-,1997年 3月17日,2-P-18,p.609-610
Attorney, Agent or Firm:
Naoki Nakao
Taku Kusano
Yukio Nakamura
Minoru Inagaki
