DOI QR코드

DOI QR Code

Adaptive Rate Control in Frame-level for Real-time H.264/AVC

실시간 H.264/AVC를 위한 적응적인 프레임 단위 비트율 제어 기법

  • 김명진 (숭실대학교 정보통신공학과) ;
  • 김경환 (숭실대학교 정보통신공학과) ;
  • 홍민철 (숭실대학교 정보통신공학과)
  • Published : 2008.11.30

Abstract

In this paper, we propose an adaptive rate control in frame-level for real-time H.264/AVC. For given QP, bits according to video characteristics, and current frame is close correlation between the adjacent frames. Using the statistical characteristic, we obtain change of occurrence bit about QP to apply the bit amount by QP from the video characteristic and applied in the estimated bit amount of the current frame. In addition, we use weight with QP and occurrence bit amount that is statistical information of encoded previous frames. Simulation results show that the proposed rate control scheme achieves time saving of more than 99% over JM 12.1 rate control algorithm. Nevertheless, PSNR and bit rate were almost same as the performances of JM.

본 논문에서는 실시간 H.264/AVC를 위한 적응적인 프레임 단위 비트율 제어 기법에 대해 제안한다. QP값에 의한 프레임당 발생 비트량은 영상의 특성에 따라 다양하게 발생하고 있으며, 부호화하고자 하는 프레임은 인접한 프레임들과의 일정한 상관관계를 유지하는 특성이 존재한다. 제안 방식은 이러한 통계적 특성을 이용하여, 영상의 특성별 QP값에 따른 발생 비트량을 적용시키기 위하여 예측된 영상의 복잡도에 따라 QP값에 대한 발생 비트량의 변화를 구하여 부호화하고자 하는 프레임의 예측 비트량에 적용하고 이전 프레임들의 통계 정보인 QP와 발생비트량과의 가중치를 이용하여 현재 프레임의 복잡도를 예측한다. 실험 결과를 통해 동일 비트율에서 PSNR 성능 저하없이 기존 방식 대비 99%이상 계산량 감소가 있음을 확인할 수 있었다.

Keywords

References

  1. Draft ITU-T Recommendation and Final Draft International Standard of Joint Video Specification (ITU-T Rec. H.264/ISO/IEC 14496-10 AVC) JVT-G050, May 2003
  2. T. Wiegand, G. Sullivan, G. Bjontegaard, and A. Luthar, "Overview of the H.264/AVC Video Coding Standard," IEEE Trans. Circuit and Systems for Video Technology, vol. 13, pp.560-576, July 2003 https://doi.org/10.1109/TCSVT.2003.815165
  3. Iain E.G. Richardson, H.264 and MPEG-4 Video Compression, Wiley, 2003
  4. J. Ostermann, J. Bormans, P. List, D. Marpe, M. Narroschke, F. Pereira, T. Stockhammer, and T. Wedi, "Video coding with H.264/AVC: tools, performance, and complexity," IEEE Circuits and Systems Magazine, vol. 4, pp. 7-28, 2004 https://doi.org/10.1109/MCAS.2004.1286980
  5. T. Wiegand, X. Zhang, and B. Girod, "Motion-compensating long-term memory prediction," Proc. IEEE Int. Conf. Image Processing, Oct. 1997
  6. T. Wiegand, X. Zhang, and B. Girod, "Block-based hybrid video coding using motion-compensated long-term memory prediction," Proc. Picture Coding Symp., Sep. 1997
  7. T. Wiegand, X. Zhang, and B. Girod, "Long-term memory motion-compensated prediction," IEEE Trans. Circuit and Systems for Video Technology, vol. 9, pp. 70-84, Feb. 1999 https://doi.org/10.1109/76.744276
  8. T. Wiegand and B. Girod, Multi-Frame Motion-Compensated Prediction for Video Transmission. Norwell, MA: Kluwer, 2001
  9. Proposed Draft of Adaptive Rate Control, Joint Video Team (JVT) of ISOKEC MPEG & ITU-T VCEG (ISOWC JTCIISC29McGll and ITU-T SG16 4.6), May 2003
  10. T. Chiang, Y.-Q. Zhang, "A new rate -control scheme using quadratic rate distortion model," IEEE Trans. Circuits Syst. Video Technoogy., vol. 7, no. 1, pp.246-250, Feb. 1997 https://doi.org/10.1109/76.554439
  11. Feng Pan, Z. Li, K. Lim and G. Feng, "A Study of MPEG-4 Rate Control Scheme and Its Improvements," IEEE Trans. Circuits Syst. Video Technology, vol. 13, no. 5, pp. 440-446, May 2003 https://doi.org/10.1109/TCSVT.2003.811603
  12. Lee H J, Chiang T H. Zhang Y Q. "Scalable rate control for MPEG-4 video," IEEE Trans. Circuits System Video Technology, vol. 10, no. 6, pp. 878-894, Oct. 2000 https://doi.org/10.1109/76.867926
  13. JM12.1, H.264/AVC reference software http://iphome.hhi.de/suehring/tml/
  14. M. Jiang and N.Ling, "On Enhancing H.264/AVC Video Rate Control by PSNR-Based Frame Complexity Estimation," IEEE Trans. Consumer. Electronics. vol. 51, no. 1, pp. 281-286, Feb. 2005 https://doi.org/10.1109/TCE.2005.1405733
  15. M. Jiang X. Yi, and N.Ling, "Improved frame-layer rate control for H.264 using MAD ratio," IEEE International Symposium on Circuits and Systems, vol. III, pp. 813-816, Vancouver, Canada, May 2004
  16. T. Wiegand, H. Schwarz, A. Joch, F. Kossentini and G. Sullivan, "Rate-Constrained Coder Control and Comparison of Video Coding Standards," IEEE Trans. Circuit and Systems for Video Technology, vol. 13, No. 7, July 2003
  17. G. J. Sullivan and T. Wiegand, "Rate-distortion optimization for video compression," IEEE Signal Processing Magazine, pp. 74-90, Nov. 1998
  18. A. Ortega and K. Ramchandran, "Rate-distortion methods for image and video compression," IEEE Signal Processing Magazine, pp. 23-50, Nov. 1998
  19. T. Chiang and Y.-Q. Zhang, "A new rate control scheme using quadratic rate distortion model," IEEE Trans. Circuit and Systems for Video Technology, vol. 7, pp.246-250, Feb. 1997 https://doi.org/10.1109/76.554439