Title :
Enhancement of Sounds in a Specific Directional Area Using Power Spectra Estimated from Multiple Beamforming Outputs
Author :
Hioka, Yusuke ; Kobayashi, Kazunori ; Furuya, Ken´ichi ; Kataoka, Akitoshi
Author_Institution :
NTT Cyber Space Labs., NTT Corp., Tokyo
Abstract :
In this paper, a method for picking up sounds located in a particular range of angles is proposed. The structure of the method is based on beamforming with postfiltering. The main part our proposal is introducing a scheme to estimate the power spectra of both desired signals and noises, which are used to derive the Wiener postfilter. From the results of some experiments in a reverberant chamber, we have confirmed that the proposed method succeeded in suppressing more than 10dB of the noise level even in a practical situation.
Keywords :
Wiener filters; acoustic signal processing; array signal processing; interference suppression; spectral analysis; Wiener postfilter; multiple beamforming outputs; noise suppression; power spectra estimation; reverberant chamber; sound enhancement; Acoustic noise; Active noise reduction; Array signal processing; Laboratories; Loudspeakers; Microphone arrays; Noise level; Proposals; Spectral analysis; Wiener filter; microphone array; multiple beamforming; noise suppression; power spectrum estimation;
Conference_Titel :
Hands-Free Speech Communication and Microphone Arrays, 2008. HSCMA 2008
Conference_Location :
Trento
Print_ISBN :
978-1-4244-2337-8
Electronic_ISBN :
978-1-4244-2338-5
DOI :
10.1109/HSCMA.2008.4538685
