Journal of the Institute of Electronics Engineers of Korea SP (대한전자공학회논문지SP)

The Institute of Electronics and Information Engineers (대한전자공학회)
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Speech Enhancement based on Smoothed Global Soft Decision

Smoothed Global Soft Decision에 근거한 음성 향상 기법

  • Jo, Q-Haing (School of Electronic and Electrical Engineering, Inha University) ;
  • Park, Yun-Sik (School of Electronic and Electrical Engineering, Inha University) ;
  • Chang, Joon-Hyuk (School of Electronic and Electrical Engineering, Inha University)
  • 조규행 (인하대학교 전자전기공학부) ;
  • 박윤식 (인하대학교 전자전기공학부) ;
  • 장준혁 (인하대학교 전자전기공학부)
  • Published : 2007.11.25
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Abstract

In this paper, we propose an improved global soft decision for speech enhancement in noise environments. From an examination of statistical model-based speech enhancement, it is shown that the global soft decision has a fundamental drawback at the offset region of speech signals. To overcome the drawback, we apply a new speech enhancement method based on a smoothed Global likelihood ratio to the global soft decision. Performances of the proposed method are evaluated by subjective tests under various environments and yield better results compared with the reported speech enhancement method.

본 논문에서는 잡음 환경에서의 음성 향상을 위해 향상된 Global Soft Decision (GSD) 기법을 제안한다. 통계적 모델을 바탕으로 한 음성 향상과 관련한 연구에서 GSD는 음성의 꼬리 부분에서 취약하다고 알려져 있으며, 이를 개선하기 위해 Smoothed Global Likelihood Ratio (SGLR)를 바탕으로 한 새로운 음성 향상 기법을 GSD에 적용한다. 제안된 방법은 다양한 잡음 환경에서 MOS 실험을 바탕으로 기존의 연구와 비교하였으며 우수한 성능을 보여주었다.

Keywords

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