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

The Korean Institute of Commucations and Information Sciences (한국통신학회)
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A Spatial Error Concealment Technique Using Edge-Oriented Interpolation

방향성 보간을 이용한 공간적 에러 은닉 기법

  • 유현선 (한양대학교 전자통신컴퓨터공학과 영상통신 및 신호처리 연구실) ;
  • 김원기 (한양대학교 전자통신컴퓨터공학과 영상통신 및 신호처리 연구실) ;
  • 정제창 (한양대학교 전자통신컴퓨터공학부)
  • Published : 2005.03.01
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Abstract

This paper introduces a spatial error concealment technique using directional interpolation in block-based compression. The first step involves finding the spatial direction vectors represented an edge-direction in the lost block using spatial boundary matching algorithm. Then, the error blocks are recovered by directional interpolation through these vectors and concealed by using the recovered blocks which have lower directional boundary matching error out of them relatively. This proposed method is able to deal with errors on macroblock or slice level adaptively. And it has lower complexity and maintains better performance compared to the conventional methods.

본 논문에서는 블록 기반의 영상압축에 있어서 방향성 기반 공간적 에러 은닉 기법을 제안한다. 제안된 기법은 우선 공간적 경계 정합 기법을 이용하여 손실된 블록 내의 에지 방향성을 나타내는 공간 방향 벡터들을 찾아낸다. 이 벡터들을 이용한 방향성 보간을 통해 복원 블록들을 만들고, 그 중 방향성 경계정합 에러가 작은 복원 블록들을 이용하여 최종 복원 영상을 생성한다. 제안된 기법은 매크로블록이나 슬라이스 단위의 에러에 대해 적응적으로 대처할 수 있고, 복잡도가 낮을 뿐만 아니라 우수한 복원 화질을 얻게 해준다.

Keywords

References

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