방송공학회논문지 (Journal of Broadcast Engineering)

  • 제14권4호
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  • Pages.501-508
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  • 2009
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  • 1226-7953(pISSN)
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  • 2287-9137(eISSN)
한국방송∙미디어공학회 (The Korean Institute of Broadcast and Media Engineers)
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H.264 동영상 부호화를 위한 효과적인 주파수 영역 잡음 제거

Efficient Transform-Domain Noise Reduction for H.264 Video Encoding

  • 발행 : 2009.07.30
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초록

본 논문은 H.264 동영상 부호기를 위한 효율적인 주파수 영역 잡음 제거 기법을 제안한다. 각 변환 블록과 잡음 제거를 위해 변형된 곱셈 팩터 행렬를 내적하는 방식으로 Wiener filtering이 이루어진다. 구현 시 look-up table을 이용하면 제안한 방법에서의 곱셈 연산을 간단히 대신할 수 있기 때문에 필터링에 의한 연산량은 무시할 만하다. 또한, 실험 결과를 통해 제안한 방법이 H.264 부호기에서 두드러진 잡음 제거 성능을 보임을 알 수 있다.

This paper proposes an efficient transform-domain noise reduction scheme in an H.264 video encoder, where the generalized Wiener filtering is performed in a quantization process by multiplying each transform block with its adaptive multiplication factor. In practice, the computational complexity of the proposed scheme is negligible by replacing the multiplication operation with a simple look-up table method. Also, experimental results show that the proposed scheme provides outstanding noise reduction performance in an H.264 video encoder.

키워드

참고문헌

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