The Journal of the Acoustical Society of Korea (한국음향학회지)

The Acoustical Society of Korea (한국음향학회)
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A Novel Covariance Matrix Estimation Method for MVDR Beamforming In Audio-Visual Communication Systems

오디오-비디오 통신 시스템에서 MVDR 빔 형성 기법을 위한 새로운 공분산 행렬 예측 방법

  • You, Gyeong-Kuk (Department of Electrical and Electronic Engineering, Yonsei University) ;
  • Yang, Jae-Mo (Department of Electrical and Electronic Engineering, Yonsei University) ;
  • Lee, Jinkyu (Department of Electrical and Electronic Engineering, Yonsei University) ;
  • Kang, Hong-Goo (Department of Electrical and Electronic Engineering, Yonsei University)
  • Received : 2014.02.18
  • Accepted : 2014.07.16
  • Published : 2014.09.30
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Abstract

This paper proposes a novel covariance matrix estimation scheme for minimum variance distortionless response (MVDR) beamforming. By accurately tracking direction-of-sound source arrival (DoA) information using audio-visual sensors, the covariance matrix is efficiently estimated by adopting a variable forgetting factor. The variable forgetting factor is determined by considering signal-to-interference ratio (SIR). Experimental results verify that the performance of the proposed method is superior to that of the conventional one in terms of interference/noise reduction and speech distortion.

논문은 MVDR 빔 형성 기법을 위한 새로운 공분산 행렬 예측을 제안한다. 오디오-비디오 센서를 이용하여 음원의 방향 정보를 정확히 추적함으로써, 공분산 행렬은 가변 적응 망각율을 적용하여 효과적으로 예측된다. 가변 적응 망각율은 신호 대 방해 신호 비를 고려하여 결정된다. 실험 결과에서는 제안하는 방법의 성능이 방해신호/잡음 감소 및 음성 왜곡의 면에서 기존의 방법의 성능보다 더 우수하다는 것을 보여준다.

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References

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