The Journal of Korean Institute of Communications and Information Sciences (한국통신학회논문지)

The Korean Institute of Commucations and Information Sciences (한국통신학회)
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Error Concealment based on Extended Block Matching using Gradient Difference

그래디언트 차를 이용한 확장된 블록매칭 기반의 에러은폐기법

  • 김동욱 (전주대학교 정보기술컴퓨터공학부) ;
  • 김진태 (한서대학교 컴퓨터과학과)
  • Published : 2003.02.01
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Abstract

The error concealment is very useful technique for real-time communication, such as video conference. In this paper. we propose the error concealment technique to minimize discontinuity of block boundary in consideration of the fact that human visual system is sensitive to discontinuity. The error concealment for each loss block is performed by extended block matching method based on gradient difference. In the simulation result, performance improvement for the proposed technique is on the average 1.32㏈ in comparison with the conventional technique.

에러 은폐기법은 네트워크를 통한 영상회의 등 실시간 전송을 필요로 하는 응용분야에서 매우 유용한 기법이다. 본 논문에서는 불연속에 민감한 시각 특성을 고려하여 블록 경계의 차를 최소화하는 에러 은폐기법을 제안한다. 손실 블록에 대한 에러 은폐는 그래디언트 차에 기반을 둔 확장된 매칭 기법을 이용하여 달성된다. 제안된 기법은 실험 영상에 대한 컴퓨터 모의 실험을 통해 기존의 기법에 비해 평균 약 1.3㏈ 의 화질의 향상을 가져왔다.

Keywords

References

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