Theoretical Noise Reduction Limits of the Generalized Sidelobe Canceller (GSC) for Speech Enhancement

Authors: J. Bitzer, K.U. Simmer, K.-D. Kammeyer
Abstract: In this paper we present an analysis of the generalized sidelobe canceller (GSC). It can be shown that the theoretical limits of the noise reduction performance depend only on the auto- and cross-spectral densities of the input signals. Furthermore, we compute the limits of the noise reduction performance for the theoretically determined diffuse noise field, which is an approximation for re-
verberant rooms. Our results will show that the GSC cannot reduce noise further than 1dB. These results were verified by simulation of reverberant environments. Only in sound-proof rooms with a reverberation time less than 100ms the GSC performs well.
Document type: Conference Paper
Publication: Phoenix, Arizona, 15. - 19. March 1999
Conference: IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP 99)
Pages: 2965-2968
Volume: 5
Index: 58
Paper KB
Last change on 29.04.2008 by C. Bockelmann
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