Adaptive filter theory (2nd ed.)
Adaptive filter theory (2nd ed.)
An integrated real-time beamforming and postfiltering system for nonstationary noise environments
EURASIP Journal on Applied Signal Processing
Springer Handbook of Speech Processing
Springer Handbook of Speech Processing
IEEE Transactions on Signal Processing
System identification using nonstationary signals
IEEE Transactions on Signal Processing
Signal enhancement using beamforming and nonstationarity withapplications to speech
IEEE Transactions on Signal Processing
A Minimum Distortion Noise Reduction Algorithm With Multiple Microphones
IEEE Transactions on Audio, Speech, and Language Processing
On Microphone-Array Beamforming From a MIMO Acoustic Signal Processing Perspective
IEEE Transactions on Audio, Speech, and Language Processing
Relative Transfer Function Identification Using Convolutive Transfer Function Approximation
IEEE Transactions on Audio, Speech, and Language Processing
System Identification in the Short-Time Fourier Transform Domain With Crossband Filtering
IEEE Transactions on Audio, Speech, and Language Processing
IEEE Transactions on Audio, Speech, and Language Processing
Dual-Source Transfer-Function Generalized Sidelobe Canceller
IEEE Transactions on Audio, Speech, and Language Processing
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In this paper, we propose a convolutive transfer function generalized sidelobe canceler (CTF-GSC), which is an adaptive beamformer designed for multichannel speech enhancement in reverberant environments. Using a complete system representation in the short-time Fourier transform (STFT) domain, we formulate a constrained minimization problem of total output noise power subject to the constraint that the signal component of the output is the desired signal, up to some prespecified filter. Then, we employ the general sidelobe canceler (GSC) structure to transform the problem into an equivalent unconstrained form by decoupling the constraint and the minimization. The CTF-GSC is obtained by applying a convolutive transfer function (CTF) approximation on the GSC scheme, which is a more accurate and a less restrictive than a multiplicative transfer function (MTF) approximation. Experimental results demonstrate that the proposed beamformer outperforms the transfer function GSC (TF-GSC) in reverberant environments and achieves both improved noise reduction and reduced speech distortion.