Title :
Beamforming microphone arrays for speech enhancement
Author :
Farrell, K. ; Mammone, R.J. ; Flanagan, J.L.
Author_Institution :
Center for Comput. Aids for Ind. Productivity, Rutgers Univ., Piscataway, NJ, USA
Abstract :
It is shown that beamforming with microphone arrays can be used to significantly reduce the effects of noise and reverberation. The Frost algorithm and a new vectorized algorithm called the row-action projection (RAP) method are shown to yield approximately 11 dB of interference suppression. Computer simulations demonstrate the performance of the beamforming techniques for various locations of interference sources. The scenarios used for the computer simulations consist of a speech signal arriving normal to the array contaminated with speech interference from an unknown direction off the normal. The direction of the desired speaker is taken to the normal to the array for the simulation; however, it could be at any specified `look direction´
Keywords :
array signal processing; microphones; speech analysis and processing; Frost algorithm; beamforming microphone arrays; computer simulations; constrained least mean square method; interference sources; iterative technique; performance; row-action projection algorithm; speech enhancement; Acoustic noise; Array signal processing; Equations; Finite impulse response filter; Frequency; Interference constraints; Microphone arrays; Reverberation; Sensor arrays; Speech enhancement;
Conference_Titel :
Acoustics, Speech, and Signal Processing, 1992. ICASSP-92., 1992 IEEE International Conference on
Conference_Location :
San Francisco, CA
Print_ISBN :
0-7803-0532-9
DOI :
10.1109/ICASSP.1992.225915
