ICASSP '99 Proceedings of the Acoustics, Speech, and Signal Processing, 1999. on 1999 IEEE International Conference - Volume 05
GSVD-based optimal filtering for single and multimicrophone speech enhancement
IEEE Transactions on Signal Processing
The broad-band Wiener solution for Griffiths-Jim beamformers
IEEE Transactions on Signal Processing
Analysis of the power spectral deviation of the general transfer function GSC
IEEE Transactions on Signal Processing
Signal enhancement using beamforming and nonstationarity withapplications to speech
IEEE Transactions on Signal Processing
Dual-Source Transfer-Function Generalized Sidelobe Canceller
IEEE Transactions on Audio, Speech, and Language Processing
New insights into the MVDR beamformer in room acoustics
IEEE Transactions on Audio, Speech, and Language Processing
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In this work, we evaluate the performance of a recently proposed adaptive beamformer, namely Dual source Transfer-Function Generalized Sidelobe Canceller (DTF-GSC). The DTF-GSC is useful for enhancing a speech signal received by an array of microphones in a noisy and reverberant environment. We demonstrate the applicability of the DTF-GSC in some representative reverberant and non-reverberant environments under various noise field conditions. The performance is evaluated based on the power spectral density (PSD) deviation imposed on the desired signal at the beamformer output, the achievable noise reduction, and the interference reduction. We show that the resulting expressions for the PSD deviation and noise reduction depend on the actual acoustical environment, the noise field, and the estimation accuracy of the relative transfer functions (RTFs), defined as the ratio between each acoustical transfer function (ATF) and a reference ATF. The achievable interference reduction is generally independent of the noise field. Experimental results demonstrate the sensitivity of the system's performance to array misalignments.