DocumentCode :
3622369
Title :
Separation of Audio Signals Into Direct and Diffuse Soundfields for Surround Sound
Author :
B.S. Olswang;Z. Cvetkovic
Author_Institution :
LOUD Technologies Inc., Wodinville, WA 98072, USA. ben.olswang@mackie.com
Volume :
5
fYear :
2006
fDate :
6/28/1905 12:00:00 AM
Abstract :
This paper presents a new method for reproduction of music in multichannel audio systems. The proposed method separates signals from individual channels into their direct and diffuse components which are then sent to different speaker elements. The direct components are sent directly to the listener, while the diffuse components are additionally scattered. The purpose of this scattering of diffuse components is twofold: first, it eliminates spurious localization cues which may be created by reproducing the sound using a small number of speakers (three to five), and second, it provides additional diffusion which improves the envelopment experience. We investigate two methods to separate direct and diffuse soundfield components, both of which assume the knowledge of the impulse response of the performance auditorium to the corresponding microphones. One method is based on techniques for multichannel equalization, while the other uses techniques for signal reconstruction after oversampled filter-bank processing. The latter method turns out to be computationally more manageable. In listening tests, subjects preferred music reproduction which separates direct and diffuse soundfields to reproduction in which both soundfields are sent to the same speaker elements
Keywords :
"Loudspeakers","Microphone arrays","Acoustic scattering","Educational institutions","Acoustic testing","Audio systems","Signal reconstruction","Music","Acoustic reflection","Acoustic arrays"
Publisher :
ieee
Conference_Titel :
Acoustics, Speech and Signal Processing, 2006. ICASSP 2006 Proceedings. 2006 IEEE International Conference on
ISSN :
1520-6149
Print_ISBN :
1-4244-0469-X
Electronic_ISBN :
2379-190X
Type :
conf
DOI :
10.1109/ICASSP.2006.1661286
Filename :
1661286
Link To Document :
بازگشت