Key-point Detection based Fast CU Decision for HEVC Intra Encoding

• Autorzy: Xu Z. , Min B. , Cheung R. C. C.

Identyfikatory

DOI

10.24425/123525

• Języki publikacji: EN

Abstrakty

EN

As the most recent video coding standard, High Efficiency Video Coding (HEVC) adopts various novel techniques, including a quad-tree based coding unit (CU) structure and additional angular modes used for intra encoding. These new techniques achieve a notable improvement in coding efficiency at the penalty of significant computational complexity increase. Thus, a fast HEVC coding algorithm is highly desirable. In this paper, we propose a fast intra CU decision algorithm for HEVC to reduce the coding complexity, mainly based on a key-point detection. A CU block is considered to have multiple gradients and is early split if corner points are detected inside the block. On the other hand, a CU block without corner points is treated to be terminated when its RD cost is also small according to statistics of the previous frames. The proposed fast algorithm achieves over 62% encoding time reduction with 3.66%, 2.82%, and 2.53% BD-Rate loss for Y, U, and V components, averagely. The experimental results show that the proposed method is efficient to fast decide CU size in HEVC intra coding, even though only static parameters are applied to all test sequences.

Słowa kluczowe

EN

HEVC; video coding; fast CU decision; corner detection

• Wydawca: Polish Academy of Sciences, Committee of Electronics and Telecommunication
• Czasopismo: International Journal of Electronics and Telecommunications
• Rocznik: 2018
• Tom: Vol. 64, No. 3
• Strony: 321--327
• Opis fizyczny: Bibliogr. 16 poz., rys., tab., wykr.

Twórcy

autor

Xu Z.

• Department of Electronic Engineering, City University of Hong Kong, Hong Kong SAR, China

autor

Min B.

• Department of Electronic Engineering, City University of Hong Kong, Hong Kong SAR, China

autor

Cheung R. C. C.

• Department of Electronic Engineering, City University of Hong Kong, Hong Kong SAR, China

Bibliografia

• [1] G. Sullivan, J. Ohm, W.-J. Han, and T. Wiegand, “Overview of the high efficiency video coding (HEVC) standard," IEEE Transactions on Circuits and Systems for Video Technology,, vol. 22, no. 12, pp. 1649–1668, 2012.
• [2] F. Bossen, B. Bross, K. Suhring, and D. Flynn, “HEVC complexity and implementation analysis,” IEEE Transactions on Circuits and Systems for Video Technology,, vol. 22, no. 12, pp. 1685–1696, 2012.
• [3] J. Lainema, F. Bossen, W.-J. Han, J. Min, and K. Ugur, “Intra coding of the HEVC standard,” IEEE Transactions on Circuits and Systems for Video Technology, vol. 22, no. 12, pp. 1792–1801, 2012.
• [4] S. Cho and M. Kim, “Fast CU splitting and pruning for suboptimal CU partitioning in HEVC intra coding,” IEEE Transactions on Circuits and Systems for Video Technology, vol. 23, no. 9, pp. 1555–1564, Sept 2013.
• [5] Z. Xu, B. Min, and R. C. Cheung, “A fast inter cu decision algorithm for hevc,” Signal Processing: Image Communication, vol. 60, pp. 211–223, 2018.
• [6] H. Zhang and Z. Ma, “Fast intra mode decision for high efficiency video coding (hevc),” IEEE Transactions on Circuits and Systems for Video Technology, vol. 24, no. 4, pp. 660–668, April 2014.
• [7] L. Shen, Z. Zhang, and P. An, “Fast CU size decision and mode decision algorithm for HEVC intra coding,” IEEE Transactions on Consumer Electronics, vol. 59, no. 1, pp. 207-213, 2013.
• [8] L. Shen, Z. Liu, X. Zhang, W. Zhao, and Z. Zhang, “An effective CU size decision method for HEVC encoders,” IEEE Transactions on Multimedia, vol. 15, no. 2, pp. 465–470, Feb 2013.
• [9] J. Siast, J. Stankowski, and M. Domański, “Hierarchical fast selection of intraframe prediction mode in hevc,” International Journal of Electronics and Telecommunications, vol. 62, no. 2, pp. 147-151, 2016.
• [10] B. Min and R. C. C. Cheung, “A fast cu size decision algorithm for the hevc intra encoder,” IEEE Transactions on Circuits and Systems for Video Technology, vol. 25, no. 5, pp. 892-896, May 2015.
• [11] C. Harris and M. Stephens, “A combined corner and edge detector.” in Alvey vision conference, vol. 15. Citeseer, 1988, p. 50.
• [12] F. Bossen, “Common test conditions and software reference configuration,” document JCTVC-L1100, Geneva, Jan. 2013.
• [13] G. Bjontegaard, “Calculation of average PSNR differences between RDcurves.” Document VCEG-M33, April, 2001.
• [14] Z. Liu, X. Yu, Y. Gao, S. Chen, X. Ji, and D. Wang, “Cu partition mode decision for hevc hardwired intra encoder using convolution neural network,” IEEE Transactions on Image Processing, vol. 25, no. 11, pp. 5088–5103, Nov 2016.
• [15] K. Lim, J. Lee, S. Kim, and S. Lee, “Fast pu skip and split termination algorithm for hevc intra prediction,” IEEE Transactions on Circuits and Systems for Video Technology, vol. 25, no. 8, pp. 1335–1346, Aug 2015.
• [16] T. Zhang, M. T. Sun, D. Zhao, and W. Gao, “Fast intra-mode and cu size decision for hevc,” IEEE Transactions on Circuits and Systems for Video Technology, vol. 27, no. 8, pp. 1714–1726, Aug 2017.

Uwagi

Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2018).