dc.contributor.author |
Fukui, M |
en |
dc.contributor.author |
Shimauchi, S |
en |
dc.contributor.author |
Hioka, Yusuke |
en |
dc.contributor.author |
Nakagawa, A |
en |
dc.contributor.author |
Haneda, Y |
en |
dc.contributor.author |
Ohmuro, H |
en |
dc.contributor.author |
Kataoka, A |
en |
dc.date.accessioned |
2015-05-26T03:21:11Z |
en |
dc.date.issued |
2014 |
en |
dc.identifier.citation |
Acoustical Science and Technology, 2014, 35 (3), pp. 150 - 158 |
en |
dc.identifier.issn |
1346-3969 |
en |
dc.identifier.uri |
http://hdl.handle.net/2292/25632 |
en |
dc.description.abstract |
This paper introduces a frequency-domain acoustic echo reduction process based on a new Wiener-filtering method taking into account the cross-spectral term between the acoustic echo and the near-end speech. The conventional echo reduction method based on Wiener filtering estimates the gain based on the assumption that the cross-spectral term of the echo and the near-end speech is zero because the acoustic echo and the near-end speech are statistically uncorrelated. However, this assumption does not always hold true in practice because the gain is estimated in a very short period where the amount of statistical data, which is used to calculate the ensemble averages of the observed signals, is insufficient. As a result, the conventional method occasionally causes the perceptual degradation of sound quality during a double-talk situation; therefore, the performance is still not sufficient. Our goal was to accurately calculate the echo-reduction gain to decrease the speech distortions produced by the echo-reduction process. The proposed method solves a least mean square error of the Wiener-filtering method by taking into account the cross-spectral term between the echo and the near-end speech to obtain a better echo-reduction gain. The performance of this method was demonstrated by objective and subjective results in which speech distortions were decreased. |
en |
dc.relation.ispartofseries |
Acoustical Science and Technology |
en |
dc.rights |
Items in ResearchSpace are protected by copyright, with all rights reserved, unless otherwise indicated. Previously published items are made available in accordance with the copyright policy of the publisher. |
en |
dc.rights.uri |
https://researchspace.auckland.ac.nz/docs/uoa-docs/rights.htm |
en |
dc.title |
Wiener solution considering cross-spectral term between echo and near-end speech for acoustic echo reduction |
en |
dc.type |
Journal Article |
en |
dc.identifier.doi |
10.1250/ast.35.150 |
en |
pubs.issue |
3 |
en |
pubs.begin-page |
150 |
en |
pubs.volume |
35 |
en |
pubs.author-url |
https://www.jstage.jst.go.jp/article/ast/35/3/35_E1362/_article |
en |
pubs.end-page |
158 |
en |
dc.rights.accessrights |
http://purl.org/eprint/accessRights/RestrictedAccess |
en |
pubs.subtype |
Article |
en |
pubs.elements-id |
448962 |
en |
pubs.org-id |
Engineering |
en |
pubs.org-id |
Mechanical Engineering |
en |
dc.identifier.eissn |
1347-5177 |
en |
pubs.number |
3 |
en |
pubs.record-created-at-source-date |
2014-08-07 |
en |