The Journal of the Acoustical Society of Korea (한국음향학회지)

The Acoustical Society of Korea (한국음향학회)
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Effective Room Equalization Using Warped Common Acoustical Pole and Zero

Warped Common Acoustical Pole and Zero 방법을 이용한 효율적인 공간 등화

  • 이준호 (연세대학교 전기전자공학과) ;
  • 박영철 (연세대학교 원주캠퍼스 정보기술학부) ;
  • 윤대희 (연세대학교 전기전자공학과) ;
  • 이석필 (전자부품연구원(KETI) 디지털미디어 연구센터)
  • Published : 2009.01.31
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Abstract

This paper presents a new method of designing room equalization filters using a warped common acoustical pole and zero (WCAPZ) modeling. The proposed method is capable of significantly reducing the order of the equalization filters without sacrificing the filter performance, especially, at low frequencies. Thus, the associated input-output delay is much smaller than the conventional block transform method while its computational complexity is comparable to it. The computational complexity also is still comparable to the conventional room equalization method, since the filter is implemented in the linear frequency domain after the pole-zero dewarping. Simulation results confirm that the use of the proposed algorithm significantly improves the room equalization over a range of low frequencies.

본 논문에서는 warped common acoustical pole and zero (WCAPZ) 모델링 방법을 이용한 새로운 공간 등화 방법을 제안한다. 제안한 방법은 저주파 영역의 등화 성능을 감소시키지 않으면서 등화 필터의 차수를 줄일 수 있는 장점을 가진다. 따라서 제안된 공간 등화 시스템은 기존의 블록 변환 방법에 비해 연산량은 비슷하면서도 적은 입출력 지연을 가지게 된다. 컴퓨터 모의실험을 통해 제안된 방법이 기존의 기법에 비해 저주파 영역에서 좋은 공간 등화 성능을 보임을 검증하였다.

Keywords

References

  1. P. A. Nelson, F. O. Bustamante, and H. Hamada, "Inverse filter design and equlization zones in multichannel sound reproduction," IEEE Trans. On Speech and Audio Proc., 3(3), 185-192, May 1995 https://doi.org/10.1109/89.388144
  2. A. V. Oppenheim and R. W. Schafer, Digital Signal Pro-cessing, (Prentice-Hall, Englewood Cliffs, HJ, 1975), Chap. 8, pp.576-588
  3. W. G. Gardner, "Efficient convolution without input-output delay," J. Audio Eng. Soc., 43(3), 127-136, Mar. 1995
  4. Y. Haneda, S. Makino, and Y. Kaneda, "Multiple-Point equalization of room transfer functions by using common acoustical ploles," IEEE Trans. On Speech and Audio Proc., 5(4), 325-333, Jul. 1997 https://doi.org/10.1109/89.593306
  5. Y. Haneda, S. Makino, and Y. Kaneda, "Common acoustical pole and zero modeling of room transfer functions," IEEE Trans. On Speech and Audio Proc., 2(2), 320-328, Apr. 1994 https://doi.org/10.1109/89.279281
  6. A. Harma, M. Karjalainen, L. Savioja, V. Valimaki, U. K. Laine, and J. Huopaniemi, "Frequency-warped signal pro-cessing for audio applications," J. Audio Eng. Soc., 48(11), 1011-1031, Nov. 2000
  7. O. Kirkeby, P. A. Nelson, H. Hamada, and F. Orduna-Bustanmante, "Fast deconvolution of multichannel systems using regularization," IEEE Trans. On Speech and Audio Proc., 6(2), 189-195, Mar. 1998 https://doi.org/10.1109/89.661479
  8. ITU-R BS 775-1 3/2 Surround Format
  9. J. B. Allen and D. A. Berkley, "Image method for efficiently simulating small room acoustics," J. Acoust. Soc. Am., 65(4), 943-950, Apr. 1979 https://doi.org/10.1121/1.382599