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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Triki, M. Triki, M. |
| Copyright Year | 2007 |
| Description | Author affiliation: Eurecom Inst., Sophia Antipolis (Triki, M.; Triki, M.) |
| Abstract | In this paper, we consider the blind multichannel dereverberation problem for a single source. The multichannel reverberation impulse response is assumed to be stationary enough to allow estimation of the correlations it induces from the received signals. It is well-known that a single-input multi-output (SIMO) filter can be equalized blindly by applying multichannel linear prediction (LP) to its output when the input is white. When the input is colored, the multichannel linear prediction will both equalize the reverberation filter and whiten the source. We exploit the channel's spatiotempo- ral diversity to estimate the source correlation structure, which can hence be used to determine a source whitening filter. Multichannel linear prediction is then applied to the sensor signals filtered by the source whitening filter, to obtain pure source dereverberation. A key parameter in this dereverberation scheme is the order of the source whitening filter. It determines the tradeoff between the modeling error (limited source whitening) and the estimation error (due to the blind estimation of the source correlations). In this paper we propose, using a statistical room reverberation model, a design to optimize the whitening order (function of the room characteristics, and the number of sub-channels). |
| Starting Page | 195 |
| Ending Page | 198 |
| File Size | 296023 |
| Page Count | 4 |
| File Format | |
| ISBN | 1424408814 |
| DOI | 10.1109/ICDSP.2007.4288552 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 2007-07-01 |
| Publisher Place | UK |
| Access Restriction | Subscribed |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | Argon Spatiotemporal phenomena Reverberation Nonlinear filters Delay Interference Finite impulse response filter Speech recognition Matrices Blind equalizers |
| Content Type | Text |
| Resource Type | Article |
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