| Presentation | 2012-03-16 Probabilistic optimized method of dereverberation, acoustic echo canceller, and noise reduction based on time-varying model of systems and sources Masahito TOGAMI, Yohei KAWAGUCHI, |
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| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | This paper deals with a simultaneous reduction technique of an acoustic echo, reverberation, and background noise at systems in which acoustic transfer functions are time-varying. For high noise-reduction performance with little speech distortion in time-varying systems, an effective utilization of both of a linear-filter and a non-linear filter is desirable. However, a simple cascade-connection of linear/non-linear filters is not good, because this causes an interference of each filter and degradation of undesired-sound reduction performance. In this paper, we propose a simultaneous optimization method of all filters by maximizing an unified likelihood function with a probabilistic model of time-variance of systems, each source. In the proposed method, the linear filters are adapted with appropriate time-weights with reference to covariance matrices of each source and systems. Experimental results with data which is recorded under a real meeting room show that the propose method is superior to cascade methods. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Dereverberation / echo canceller / probablistic optimization / time-varying system |
| Paper # | EA2011-128 |
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| Committee | EA |
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| Conference Date | 2012/3/9(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
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| Paper Information | |
| Registration To | Engineering Acoustics (EA) |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Probabilistic optimized method of dereverberation, acoustic echo canceller, and noise reduction based on time-varying model of systems and sources |
| Sub Title (in English) | |
| Keyword(1) | Dereverberation |
| Keyword(2) | echo canceller |
| Keyword(3) | probablistic optimization |
| Keyword(4) | time-varying system |
| 1st Author's Name | Masahito TOGAMI |
| 1st Author's Affiliation | Central Research Laboratory, Hitachi Ltd.() |
| 2nd Author's Name | Yohei KAWAGUCHI |
| 2nd Author's Affiliation | Central Research Laboratory, Hitachi Ltd. |
| Date | 2012-03-16 |
| Paper # | EA2011-128 |
| Volume (vol) | vol.111 |
| Number (no) | 490 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |