Title:
MULTI-CHANNEL ECHO ERASURE METHOD, MULTI-CHANNEL ECHO ERASURE DEVICE, AND PROGRAM OF THE SAME
Document Type and Number:
Japanese Patent JP2012039441
Kind Code:
A
Abstract:
To provide a multi-channel echo erasure technology which can erase an echo swiftly without being affected by variance in an echo path and cross-correlation between a double-talk and a receiving signal channel.
A residual echo erasure part or a second residual echo erasure part estimates an input-output transfer characteristic by using a power spectrum of a pseudo echo signal and a cross spectrum between a second sound collection signal or a third sound collection signal and the pseudo echo signal, and predicts a residual echo component included in the second sound collection signal or the third sound collection signal from the pseudo echo signal and the input-output transfer characteristic.
Inventors:
EMURA AKIRA
HANEDA YOICHI
HANEDA YOICHI
Application Number:
JP2010178495A
Publication Date:
February 23, 2012
Filing Date:
August 09, 2010
Export Citation:
Assignee:
NIPPON TELEGRAPH & TELEPHONE
International Classes:
H04B3/23; H04M1/60
Domestic Patent References:
| JP2003309493A | 2003-10-31 | |||
| JP2011166484A | 2011-08-25 |
Other References:
JPN6013019399; Ｈｅｒｂｅｒｔ Ｂｕｃｈｎｅｒ， ｅｔ ａｌ．: 'Ｉｍｐｒｏｖｅｄ Ｋａｌｍａｎ ｇａｉｎ ｃｏｍｐｕｔａｔｉｏｎ ｆｏｒ ｍｕｌｔｉｃｈａｎｎｅｌ ｆｒｅｑｕｅｎｃｙ-ｄｏｍａｉｎ ａｄａｐｔｉｖｅ ｆｉｌｔｅｒｉｎｇ ａｎｄ ａｐｐｌｉｃａｔｉｏ' ２００２ ＩＥＥＥ Ｉｎｔｅｒｎａｔｉｏｎａｌ Ｃｏｎｆｅｒｅｎｃｅ ｏｎ Ａｃｏｕｓｔｉｃｓ， Ｓｐｅｅｃｈ， ａｎｄ Ｓｉｇｎａｌ Ｐｒｏｃｅｓｓｉｎｇ （ＩＣＡＳＳＰ） , 20020513, ｐａｇｅｓ．ＩＩ-１９０９ - ＩＩ-１９１２, ＩＥＥＥ
Attorney, Agent or Firm:
Naoki Nakao
Yukio Nakamura
Yoshimura Munehiro
Taku Kusano
Yukio Nakamura
Yoshimura Munehiro
Taku Kusano
Previous Patent: 無線測定収集方法及び無線端末
Next Patent: ELECTRIC POWER SUBSTATION MONITORING CONTROL SYSTEM, AUTOMATIC PHONE ANSWERING DEVICE IN ELECTRIC PO...
Next Patent: ELECTRIC POWER SUBSTATION MONITORING CONTROL SYSTEM, AUTOMATIC PHONE ANSWERING DEVICE IN ELECTRIC PO...