Title :
Post-microphone-array speech enhancement with adaptive filters for forensic application
Author :
Cao, Yuchang ; Sridharan, Sridha ; Moody, Miles P.
Author_Institution :
Signal Process. Res. Centre, Queensland Univ. of Technol., Brisbane, Qld., Australia
Abstract :
A multi-microphone speech enhancement system including two stages of processing has been developed. In the first stage, the array is aimed at the desired signal source and the noise signal source(s) respectively by means of the Frost algorithm or DS beamforming. In the second stage, the difference between the SNRs of the array outputs are employed to improve the SNR of the desired signal further by an adaptive filter with MRSS (matrix ratio sub space) algorithm. This algorithm is based on the orthogonal and coincidental subspace eigen analysis. The mathematical derivation and the simulation results that illustrate the advantages of the system are presented
Keywords :
acoustic arrays; acoustic signal processing; adaptive filters; array signal processing; audio signals; filtering and prediction theory; interference suppression; microphones; reverberation; speech analysis and processing; speech intelligibility; DS beamforming; Frost algorithm; MRSS; adaptive filters; array outputs; coincidental subspace eigenanalysis; forensic application; matrix ratio sub space algorithm; multimicrophone speech enhancement system; noise signal source; orthogonal subspace eigenanalysis; postmicrophone-array speech enhancement; signal source; Adaptive arrays; Adaptive filters; Array signal processing; Forensics; Microphone arrays; Reverberation; Signal processing; Signal processing algorithms; Signal to noise ratio; Speech enhancement;
Conference_Titel :
Speech, Image Processing and Neural Networks, 1994. Proceedings, ISSIPNN '94., 1994 International Symposium on
Print_ISBN :
0-7803-1865-X
DOI :
10.1109/SIPNN.1994.344919
