Title:
反響消去方法、反響消去装置、そのプログラムおよび記録媒体
Document Type and Number:
Japanese Patent JP5325134
Kind Code:
B2
Abstract:
To provide an echo canceling method that stably and efficiently cancels echo with less computation complexity even if an acoustic path between a reproduction means and a sound collection means is nonlinear, and sound volume significantly varies , and prevents deterioration in speech quality.
A received signal is divided into a plurality of components by a predetermined method. A false echo is generated for each component by using a plurality of adaptive filters with multiplication coefficients generated according to the size of the components set thereto, and then the false echo is subtracted from a collected signal to obtain a transmission signal from which the echo is canceled.
COPYRIGHT: (C)2011,JPO&INPIT
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Inventors:
Shoichiro Saito
Akira Nakagawa
Yoichi Haneda
Akira Nakagawa
Yoichi Haneda
Application Number:
JP2010023554A
Publication Date:
October 23, 2013
Filing Date:
February 04, 2010
Export Citation:
Assignee:
Nippon Telegraph and Telephone Corporation
International Classes:
H04B3/23; G10L21/0208; G10L21/0232; H04M1/00; H04R3/02
Domestic Patent References:
| JP3243020A | ||||
| JP2000353989A | ||||
| JP2008005094A | ||||
| JP2009539312A | ||||
| JP2008199595A |
Foreign References:
| WO2007026691A1 |
Other References:
青木亮、藤井健作、棟安実治,非線形未知システムの同定アルゴリズムの提案,電子情報通信学会技術研究報告,日本,電子情報通信学会,2007年 1月18日,Vol.106, No.483,pp.27-32
Suehiro Shimauchi et al,Double-Talk Robust Frequency Domain Echo Cancellation Algorithm with Scalable Nonlinear Reference an,2003 International Workshop on Acoustic Echo and Noise Control,2003年 9月,pp.23-26
Suehiro Shimauchi et al,Double-Talk Robust Frequency Domain Echo Cancellation Algorithm with Scalable Nonlinear Reference an,2003 International Workshop on Acoustic Echo and Noise Control,2003年 9月,pp.23-26
Attorney, Agent or Firm:
Naoki Nakao
Yukio Nakamura
Yoshimura Munehiro
Taku Kusano
Yukio Nakamura
Yoshimura Munehiro
Taku Kusano