Relaxed Binaural LCMV Beamforming

Relaxed Binaural LCMV Beamforming

Koutrouvelis, A. (TU Delft Signal Processing Systems)
Hendriks, R.C. (TU Delft Signal Processing Systems)
Heusdens, R. (TU Delft Signal Processing Systems)
Jensen, Jesper (Aalborg University)

2017

In this paper, we propose a new binaural beamforming technique, which can be seen as a relaxation of the linearly constrained minimum variance (LCMV) framework. The proposed method can achieve simultaneous noise reduction and exact binaural cue preservation of the target source, similar to the binaural minimum variance distortionless response (BMVDR) method. However, unlike BMVDR, the proposed method is also able to preserve the binaural cues of multiple interferers to a certain predefined accuracy. Specifically, it is able to control the trade-off between noise reduction and binaural cue preservation of the interferers by using a separate trade-off parameter per-interferer. Moreover, we provide a robust way of selecting these trade-off parameters in such a way that the preservation accuracy for the binaural cues of the interferers is always better than the corresponding ones of the BMVDR. The relaxation of the constraints in the proposed method achieves approximate binaural cue preservation of more interferers than other previously presented LCMV-based binaural beamforming methods that use strict equality constraints.

Beamforming
binaural cue preservation
hearing aids
LCMV
multi-microphone noise reduction
MVDR

http://resolver.tudelft.nl/uuid:eb2bef76-066c-49a6-ada6-b6cc560608d8

https://doi.org/10.1109/TASLP.2016.2628642

2329-9290

IEEE - ACM Transactions on Audio, Speech, and Language Processing, 25 (1), 137-152

Accepted Author Manuscript

Institutional Repository

journal article

© 2017 A. Koutrouvelis, R.C. Hendriks, R. Heusdens, Jesper Jensen