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Spatial Audio Signal Processing Technology Using Multi-Channel 3D Microphone  

Kang Kyeongok (한국전자통신연구원 방송미디어연구그룹)
Lee Taejin (한국전자통신연구원 방송미디어연구그룹)
Publication Information
The Journal of the Acoustical Society of Korea / v.24, no.2, 2005 , pp. 68-77 More about this Journal
Abstract
The purpose of a spatial audio system is to give a listener an impression as if he were present in a recorded environment when its sound is reproduced. For this purpose a dummy head microphone is generally used. Because of its human-like shape, dummy head microphone can reproduce spatial images through headphone reproduction. However, its shape and size are restriction to public use and it is difficult to convert the output signal of dummy head microphone into a multi-channel signal for multi-channel environment. So, in this paper, we propose a multi-channel 3D microphone technology. The multi-channel 3D microphone acquire a spatial audio using five microphones around a horizontal plane of a rigid sphere and through post processing, it can reproduce various reproduction signals for headphone, stereo, stereo dipole, 4ch and 5ch reproduction environments. Because of complex computation, we implemented H/W based post processing system. To verily the Performance of the multi-channel 3D microphone, localization experiments were Performed. The result shows that a front/back confusion, which is the one of common limitations of conventional dummy head technology, can be reduced dramatically.
Keywords
3D Audio; Dummy head; Multi-channel 3D Microphone; Crosstalk Cancellation;
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  • Reference
1 Francis Rumsey and Tim McCormick, Sound and Recording: An Introduction. Focal Press, 2002
2 D. H. Cooper and J. Sauck. 'Prospects for transaural recording,' J. Audio Eng. Soc. 37 (1/2), 3-19, 1989
3 Yuvi Kahana, Philip A. Nelson, Ole Kirkeby, and Hareo Hamada, 'A multiple microphone recording technique for the generation of virtual acoustic images,' J. Acoustic. Soc. Am., 105 (3), 1503-1516, 1999   DOI   ScienceOn
4 Hareo Hamada, Hironori Tokuno, Yuko Watanabe and P. A. Nelson, '3D Sound Generation using Two Loudspeakers Stereo Dipole System and Its Applications,' AES 15th International Conference, 1998
5 Ole Kirkeby, Philip A. Nelson and Hareo Hamada, 'The Stereo Dipole - A Virtual Source Imaging System Using Two Closely Spaced Loudspeakers,' J. AES, 46 (5), 387-395 1998
6 Blauert, Spatial Hearing: The Psychophysics of Human Sound Localization, MIT. Cambridge, MA. 1983
7 김래훈, 임준석, 성굉모, '3차원 오디오 시스템에서 합과 차 여파기를 이용한 새로운 간섭신호 제거 방법', 한국음향학회지, 20 (4), 17-21, 2001
8 Ole Kirkeby, Philip A. Nelson, Hareo Hamada, and Felipe Orduna-Bustamante, 'Fast Deconvolution of Multichannel Systems Using Regularization,' IEEE Trans. On Speech and Audio Processing, 6 (2), 189-194, 1998   DOI   ScienceOn
9 강경옥, 장대영, 서정일, 정대권, '객체기반 3차원 오디오 방송 시스템 설계', 한국음향학회지, 22 (7), 592-602, 2003
10 ITU-R Recommendation BS. 755: 'Multi-channel stereophonic sound system with or without accompanying picture' 1993
11 최갑근, 방승범, 정완섭, 김순협, '5.1채널 스피커 시스템에서 트랜스오럴 필터 구현에 관한 연구', 한국음향학회지, 21 (3), 245-255, 2002
12 http://wvvw.theaudio.com/bs-3d.html
13 구자현, 'Rayleigh의 소리 방향 지각 연구에 대한 과학서적 고찰', 한국음향학회지, 21 (8), 695-702, 2002
14 Corey I. Cheng and Gregory H. Wakefield, 'Introduction to HRTFs: Representations of HRTFs in Time, Frequency, and Space,' J. AES, 49 (4), 231-249, 2001
15 P. A. Nelson and S. J. Elliott, Active Control of Sound, Academic Press, 1992
16 http://wvvw.schoeps.de/E/kfm6.html