| Paper ID | SPE-18.2 |
| Paper Title |
JOINT MAXIMUM LIKELIHOOD ESTIMATION OF POWER SPECTRAL DENSITIES AND RELATIVE ACOUSTIC TRANSFER FUNCTIONS FOR ACOUSTIC BEAMFORMING |
| Authors |
Poul Hoang, Demant A/S, Denmark; Zheng-Hua Tan, Aalborg University, Denmark; Jan Mark de Han, Jesper Jensen, Demant A/S, Denmark |
| Session | SPE-18: Speech Enhancement 4: Multi-channel Processing |
| Location | Gather.Town |
| Session Time: | Wednesday, 09 June, 14:00 - 14:45 |
| Presentation Time: | Wednesday, 09 June, 14:00 - 14:45 |
| Presentation |
Poster
|
| Topic |
Speech Processing: [SPE-ENHA] Speech Enhancement and Separation |
| IEEE Xplore Open Preview |
Click here to view in IEEE Xplore |
| Virtual Presentation |
Click here to watch in the Virtual Conference |
| Abstract |
Acoustic beamforming is crucial for many applications where extraction of a target signal from a noisy environment is required. In order to implement practical beamformers, e.g. the multichannel Wiener filter (MWF), estimation of the target and noise power spectral densities (PSDs), and the relative acoustic transfer functions (RATFs) is essential. Several methods, e.g. the so-called covariance whitening (CW) approach, have been proposed for estimating these parameters. However, it seems largely unknown that the CW approach in fact leads to maximum likelihood (ML) estimates of the RATFs. We use historical results to derive joint ML estimates (MLEs) of the RATFs and PSDs in the context of acoustic beamforming. In addition, based on the MLEs, we propose a basic VAD framework using concentrated likelihood ratios. We use the joint MLEs of the PSDs, RATFs, and the proposed VAD to implement beamformers in a hearing aid application, and compare its performance to competing methods. Simulation results show that the proposed scheme can outperform competing methods, in particular in realistic situations where highly accurate prior RATF knowledge is not available or at higher signal-to-noise ratios. |
