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

  • 제36권6C호
  • /
  • Pages.355-360
  • /
  • 2011
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  • 1226-4717(pISSN)
  • /
  • 2287-3880(eISSN)
한국통신학회 (The Korean Institute of Commucations and Information Sciences)
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무손실 영상 압축을 위한 향상된 CABAC 방법

Improved CABAC Method for Lossless Image Compression

  • 허진 (광주과학기술원 정보통신공학과) ;
  • 호요성 (광주과학기술원 정보통신공학과)
  • 투고 : 2011.02.08
  • 심사 : 2011.05.31
  • 발행 : 2011.06.30
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⟨ 이전 논문 다음 논문 ⟩

초록

본 논문에서는 무손실 영상 압축의 효율을 높이가 위해 새로운 문맥 기반 적응적 이진 산술 부호화(context-based adaptive binary arithmetic coding, CABAC) 방법을 제안한다. 기존의 H.264/AVC의 CABAC은 손실 (loosy) 부호화 환경에 적합하게 설계되었기 때문에, 무손실 (lossless) 부호화 환경에서 최적의 부호화 성능을 제공하지 못한다. 따라서, 무손실 화면내 부호화 환경에서 잔여 신호의 통계적 특성을 고려하여 향상된 CABAC 기반의 잔여 신호 부호화 방법을 제안한다. 실험 결과로부터 무손실 화면내 부호화 환경에서 본 논문에서 제안하는 향상된 CABAC 방법이 기존의 CABAC 방법에 비해 평균적으로 약 18.2% 정도의 비트 수를 감소시키는 것을 확인했다.

In this paper, we propose a new context-based adaptive binary arithmetic coding (CABAC) method for lossless image compression. Since the conventional CABAC in H.264/AVC was originally designed for lossy coding, it does not yield adequate performance during lossless coding. Therefore, we proposed an improved CABAC method for lossless intra coding by considering the statistical characteristics of residual data in lossless intra coding. Experimental results showed that the proposed method reduced the bit rate by 18.2%, compared to the conventional CABAC for lossless intra coding.

키워드

참고문헌

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  7. 호요성, 허진, "H.264/AVC 표준의 CAVLC/ CABAC 알고리즘 이해 및 분석," 두양사, 2009.
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