Copyright © 2008 The Institute of Electronics, Information and Communication Engineers
Special Section on Signal Processing for Audio and Visual Systems and Its Implementations -- Papers -- Engineering Acoustics |
Embedded System Implementation of Sound Localization in Proximal Region
1 The author is with the Graduate School of Language and Culture, Osaka University, Toyonaka-shi, 560-0043 Japan. E-mail: iwanaga{at}lang.osaka-u.ac.jp, 2 The authors are with the Graduate School of Information Science and Technology, Osaka University, Suita-shi, 565-0871 Japan. E-mail: matumura{at}ist.osaka-u.ac.jp; onoye{at}ist.osaka-u.ac.jp, 3 The author is with Arnis Sound Technologies, Co., Ltd., Tokyo, 145-0062 Japan. E-mail: kobachan{at}arns.com
A sound localization method in the proximal region is proposed, which is based on a low-cost 3D sound localization algorithm with the use of head-related transfer functions (HRTFs). The auditory parallax model is applied to the current algorithm so that more accurate HRTFs can be used for sound localization in the proximal region. In addition, head-shadowing effects based on rigid-sphere model are reproduced in the proximal region by means of a second-order IIR filter. A subjective listening test demonstrates the effectiveness of the proposed method. Embedded system implementation of the proposed method is also described claiming that the proposed method improves sound effects in the proximal region only with 5.1% increase of memory capacity and 8.3% of computational costs.
Key Words: sound localization, proximal region, head-related transfer function, auditory parallax model, rigid-sphere model
Manuscript received July 6, 2007. Manuscript revised October 19, 2007.
Reference
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