Copyright © 2008 The Institute of Electronics, Information and Communication Engineers
Special Section on Acoustic Scene Analysis and Reproduction - Papers |
Rapid Compensation of Temperature Fluctuation Effect for Multichannel Sound Field Reproduction System
1 The authors are with the Graduate School of Information Science, Nara Institute of Science and Technology, Ikoma-shi, 630-0192 Japan. E-mail: sawatari{at}is.naist.jp, 2 The author is with Faculty of Engineering, Shizuoka University, Hamamatsu-shi, 432-8561 Japan.
In this paper, we propose a computationally efficient method of compensating temperature for the transaural stereo. The conventional method can be used to estimate the change in impulse responses caused by the fluctuation of temperature with high accuracy. However, the large amount of computation required makes real-time implementation difficult. Focusing on the fact that the amount of compensation depends on the length of the impulse response, we reduce the computation required by segmenting the impulse response. We segment the impulse responses in the time domain and estimate the effect of temperature fluctuation for each of the segments. By joining the processed segments, we obtain the compensated impulse response of the whole length. Experimental results show that the proposed method can reduce the computation required by a factor of nine without degradation of the accuracy.
Key Words: sound field control, temperature fluctuation, computational efficiency
Manuscript received August 4, 2007. Manuscript revised November 26, 2007.
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