Wiener solution considering cross-spectral term between echo and near-end speech for acoustic echo reduction
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- Fukui Masahiro
- NTT Media Intelligence Laboratories, NTT Corporation
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- Shimauchi Suehiro
- NTT Media Intelligence Laboratories, NTT Corporation
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- Hioka Yusuke
- Department of Electrical and Computer Engineering, University of Canterbury
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- Nakagawa Akira
- NTT Media Intelligence Laboratories, NTT Corporation
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- Haneda Yoichi
- Faculty of Informatics and Engineering, The University of Electro-Communications
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- Kataoka Akitoshi
- Faculty of Science and Technology, Ryukoku University
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- Ohmuro Hitoshi
- NTT Media Intelligence Laboratories, NTT Corporation
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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.
収録刊行物
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- Acoustical Science and Technology
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Acoustical Science and Technology 35 (3), 150-158, 2014
一般社団法人 日本音響学会
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詳細情報 詳細情報について
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- CRID
- 1390001205088922368
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- NII論文ID
- 130004137805
- 40020051218
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- NII書誌ID
- AA11501808
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- ISSN
- 13475177
- 03694232
- 13463969
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- NDL書誌ID
- 025427636
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- 本文言語コード
- en
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- データソース種別
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- JaLC
- NDL
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- CiNii Articles
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- 使用不可