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Speech Enhancement With a GSC-Like Structure Employing Eigenvector-Based Transfer Function Ratios Estimation

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3 Author(s)
Krueger, A. ; Dept. of Commun. Eng., Univ. of Paderborn, Paderborn, Germany ; Warsitz, E. ; Haeb-Umbach, R.

In this paper, we present a novel blocking matrix and fixed beamformer design for a generalized sidelobe canceler for speech enhancement in a reverberant enclosure. They are based on a new method for estimating the acoustical transfer function ratios in the presence of stationary noise. The estimation method relies on solving a generalized eigenvalue problem in each frequency bin. An adaptive eigenvector tracking utilizing the power iteration method is employed and shown to achieve a high convergence speed. Simulation results demonstrate that the proposed beamformer leads to better noise and interference reduction and reduced speech distortions compared to other blocking matrix designs from the literature.

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Audio, Speech, and Language Processing, IEEE Transactions on  (Volume:19 ,  Issue: 1 )