방송공학회논문지 (Journal of Broadcast Engineering)

  • 제19권3호
  • /
  • Pages.307-315
  • /
  • 2014
  • /
  • 1226-7953(pISSN)
  • /
  • 2287-9137(eISSN)
한국방송∙미디어공학회 (The Korean Institute of Broadcast and Media Engineers)
권호 표지
DOI QR코드

DOI QR Code

CR-DPCM을 이용한 HEVC 무손실 인트라 예측 방법

CR-DPCM for Lossless Intra Prediction Method in HEVC

  • 홍성욱 (세종대학교 컴퓨터공학과 DMS 연구실) ;
  • 이영렬 (세종대학교 컴퓨터공학과 DMS 연구실)
  • 투고 : 2014.03.10
  • 심사 : 2014.04.30
  • 발행 : 2014.05.30
PDF 다운로드
⟨ 이전 논문 다음 논문 ⟩

초록

차세대 영상압축 표준인 HEVC(High Efficiency Video Coding)에 적용 가능한 무손실 인트라 예측 방법 CR-DPCM(Cross-Residual Difference Pulse Code Modulation)을 제안한다. HEVC는 공간상의 중복성을 줄이기 위해 다양한 방향의 예측을 하도록 만들어졌으며, 이를 위해 부호화 하려는 블록의 주변 화소들을 사용하고 있다. 본 논문에서 제안하는 HEVC 적용 가능한 무손실 인트라 예측 방법은, 예측을 위해 화소 단위 DPCM을 수행하면서도 잔차 변환과, 잔차 변환의 결과로 얻어지는 잔차 신호에 대해 2차로 진행하는 잔차 변환을 예측 방향에 맞추어 교차시키는 CR-DPCM 방법을 사용하며, 이는 기존 제안한 방법인 제 2차 잔차 변환(Secondary Residual Transform)보다 높은 성능 향상을 가진다. 제안하는 무손실 인트라 코딩 방식인 CR-DPCM 방법은 기존의 HEVC 표준 방법과 비교 하였을 때 bit-rate 평균 약 8.43%정도 감소시키며, JPEG2000 무손실 압축 방법과 비교해서도 높은 성능 향상을 가진다.

A new modified lossless intra-coding method based on a cross residual transform is applied to HEVC(High Efficiency Video Coding). The HEVC standard including a multi-directional spatial prediction method to reduce spatial redundancy encodes the pixels in a PU (Prediction Unit) by using neighboring pixels. In the new modified lossless intra-coding method, the spatial prediction is performed by pixel-based DPCM but is implemented by block-based manner by using cross residual transform on the HEVC standard. The experimental results show that the new lossless intra-coding method reduces the bit rate of approximately 8.4% in comparison with the lossless-intra coding method in the HEVC standard and the proposed method results in slightly better compression ratio than the JPEG2000 lossless coding.

키워드

참고문헌

  1. B. Bross, W.-J. Han, G. J. Sullivan, J.-R. Ohm, T. Wiegand, "High efficiency video coding (HEVC) text specification draft 7", document JCTVC-I1003, Jul. 2012.
  2. W. Gao, M. Jiang, H. Yu, "AHG19: A QP-based enabling method for lossless coding in HEVC". document JCTVC-H0528, Feb. 2012.
  3. Minhua Zhou, "AHG19: Method of frame-based lossless coding mode for HEVC". document JCTVC-H0083, Feb. 2012.
  4. W. Gao, M. Jiang, H. Yu, M. Zhou, "AHG19: A lossless coding solution for HEVC". document JCTVC-H0530, Feb. 2012.
  5. G. J. Sullivan and R. L. Baker, "Efficient quad-tree coding of images and video", IEEE Trans. Image Process, Vol. 3, no.3, pp. 327-331, May 1994. https://doi.org/10.1109/83.287030
  6. M. Winken, S. Bosse, B. Bross, etc, "Description of video coding technology proposal by Fraunhofer HHI". document JCTVC-A116, Apr. 2010.
  7. K. McCann, W. J. Han, etc, "Samsung's response to the call for proposals on video compression technology," Joint Collaborative Team on Video Coding(JCT-VC) of ITU-T SG16 WP3 and ISO/IEC JTC1/SC29/WG11, 1st meeting, JCTVC-A124, Apr. 2010.
  8. K. Ugur, K. R. Andersson, A. Fuldseth, "Video coding technology proposal by Tandberg, Nokia, and Ericsson". document JCTVC-A119, Apr. 2010.
  9. J,-H. Min, S. Lee, etc, "Unification of the directional intra prediction methods in TMuC". document JCTVC-B100, Jul. 2010.
  10. Frank Bossen, T. Tan, "Simplified angular intra prediction". document JCTVC-B093, Jul. 2010.
  11. J. Chen, V. Seregin, etc, "CE6.a.4: Chroma intra prediction by reconstructed luma samples". document JCTVC-E266, Mar. 2011.
  12. S. Kanumuri, Frank Bossen, "CE6.e/f: Planar mode experiments and results". document JCTVC-E321, Mar. 2011.
  13. S,-C. Lim, H. Y. Kim, J. S. Choi, "Non-CE6: Simplification of intra vertical/horizontal prediction". document JCTVC-H0238, Feb. 2012.
  14. ITU-T and ISO/IEC, "Advanced Video Coding for Generic Audiovisual Services," ITU-T Rec. H.264 and ISO/IEC 14496-10, version 17, Jun. 2011.
  15. Y.-L. Lee and K.-H. Han, Lossless Coding for Professional Extensions, ISO/IEC JTC1/SC29/WG11 and ITU-T Q6/SG16 JointVideo Team document JVT-L017, Jul. 2004.
  16. Y.-L. Lee, K.-H. Han, and S.-C. Lim, Lossless Intra Coding for Improved 4:4:4 Coding in H.264/MPEG-4 AVC, ISO/IEC JTC1/SC29/WG11 and ITU-T Q6/SG16 Joint Video Team document JVT-P016, Jul. 2005.
  17. Y.-L. Lee and K.-H. Han, Complexity of the Proposed Lossless Intra, ISO/IEC JTC1/SC29/WG11 and ITU-T Q6/SG16, Document JVT-Q035r1, Oct. 2005.
  18. Y.-L. Lee, K.-H. Han and G. J. Sullivan, "Improved Lossless Intra Coding for H.264/MPEG-4 AVC", IEEE Trans. Image Process., vol. 15, no. 9, pp. 2610-2615, Sep. 2006. https://doi.org/10.1109/TIP.2006.877396
  19. Frank Bossen, "Common test conditions and software reference configurations". document JCTVC-I1100, May. 2012.
  20. J,-H Kwak and Y.-L. Lee, "Secondary Residual Transform for Lossless Intra Coding in HEVC". The Korean Society of Broadcast Engineers, vol. 17, no. 5, Sep. 2012 https://doi.org/10.5909/JBE.2012.17.5.734