Title:
ECHO SUPPRESSING METHOD AND DEVICE
Document Type and Number:
WIPO Patent Application WO/2007/049644
Kind Code:
A1
Abstract:
A converting section (100) uses either the output signal of a sound collector or
the signal which is the remainder of the subtraction of the output of an echo chancellor
from the output signal of the collector as a first signal, corrects the first signal
by using a crosstalk estimated value indicating the estimated value of the amount
of crosstalk of the echo into the first signal, and thus limits the corrected first
signal below the estimated near-end noise.
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Inventors:
HOSHUYAMA OSAMU (JP)
Application Number:
PCT/JP2006/321268
Publication Date:
May 03, 2007
Filing Date:
October 25, 2006
Export Citation:
Assignee:
NEC CORP (JP)
HOSHUYAMA OSAMU (JP)
HOSHUYAMA OSAMU (JP)
International Classes:
H04B3/20; G10L21/0232; H04B3/23; H04M1/60; H04R3/02
Foreign References:
| JP2004056453A | 2004-02-19 | |||
| JPH08288894A | 1996-11-01 | |||
| JP2000252883A | 2000-09-14 | |||
| JPH0541681A | 1993-02-19 | |||
| JP2002009677A | 2002-01-11 | |||
| JPH07240703A | 1995-09-12 | |||
| JPH089005A | 1996-01-12 | |||
| JPH09116469A | 1997-05-02 | |||
| JP2004056453A | 2004-02-19 | |||
| JP2004012884A | 2004-01-15 |
Other References:
EBERHARD HANSLER: "The hands-free telephone problem: an annotated bibliography update", ANNALS OF TELECOMMUNICATIONS, 1994, pages 360 - 367
A. ALVAREZ ET AL.: "A Speech Enhancement System Based On Negative Beamforming And Spectral Subtraction", INTERNATIONAL WORKSHOP ON ACOUSTIC ECHO AND NOISE CONTROL, 2001
JOHN J. SHYNK: "Frequency-Domain and Multirate Adaptive Filtering", IEEE SIGNAL PROCESSING MAGAZINE, January 1992 (1992-01-01), pages 14 - 37
See also references of EP 1942583A4
A. ALVAREZ ET AL.: "A Speech Enhancement System Based On Negative Beamforming And Spectral Subtraction", INTERNATIONAL WORKSHOP ON ACOUSTIC ECHO AND NOISE CONTROL, 2001
JOHN J. SHYNK: "Frequency-Domain and Multirate Adaptive Filtering", IEEE SIGNAL PROCESSING MAGAZINE, January 1992 (1992-01-01), pages 14 - 37
See also references of EP 1942583A4
Attorney, Agent or Firm:
MIYAZAKI, Teruo et al. (16th Kowa Bldg. 9-20, Akasaka 1-chome Minato-k, Tokyo 52, JP)
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