Title :
Speech source localization in near field
Author :
Ju, Tailiang ; Xu, YiLing ; Peng, Qicong
Author_Institution :
Sch. of Commun. & Inf. Eng., Univ. of Electron. Sci. & Technol. of China, Chengdu, China
Abstract :
In array signal processing, a plane wave and uncorrelated signal sources are assumed for the sake of simplicity (far-field and independent signal sources assumption). However, this far-field assumption does not always hold for a microphone array, resulting in distortion in the array output. The performance of DOA estimation is poor in the case of correlated signal sources. A microphone array model, based on the near field, is built. A new DOA algorithm is presented. The modified MUSIC algorithm is adopted to eliminate the effect of the correlated signal sources in the subspace method. This algorithm utilizes three dimensional (frequency, amplitude and orientation angle) searching for the spectrum peak; its effectiveness is verified by computer simulation.
Keywords :
array signal processing; direction-of-arrival estimation; distortion; signal classification; speech processing; DOA estimation; array signal processing; correlated signal sources; far-field assumption; independent signal sources assumption; microphone array model; modified MUSIC algorithm; near field; plane wave; signal distortion; spectrum peak; speech source localization; three dimensional searching; uncorrelated signal sources; Application software; Array signal processing; Auditory system; Biomedical signal processing; Direction of arrival estimation; Microphone arrays; Multiple signal classification; Signal processing; Signal processing algorithms; Speech;
Conference_Titel :
Communications, Circuits and Systems, 2004. ICCCAS 2004. 2004 International Conference on
Print_ISBN :
0-7803-8647-7
DOI :
10.1109/ICCCAS.2004.1346293