Abstract
To meet the needs of various video service under different network conditions, multi-rate encoding using HEVC is in substantial demand. Although the efficient HEVC encoder x265 is developed with many optimization skills, it still performs slowly in intra coding. In this paper, we focus on multi-rate coding which simultaneously outputs several compressed bitstreams with different bitrates for one input source video. By analyzing the correlation and similarity of CU depth and PU prediction mode between multi-rate HEVC streams, an efficient HEVC multi-rate encoding system is proposed. Early-skip depth decision and fast intra mode decision are presented for reducing the coding complexity of the slave encoders by utilizing heuristic coding information obtained from the master encoder. Experimental results show that the proposed method can averagely reduce 52.45% total encoding time, in comparison with independent x265 encoders, with only 0.86% BDBR performance degradation. The time saving can reach up to 71.52% for only slave encoders.
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References
Sullivan, G.J., et al.: Overview of the high efficiency video coding (HEVC) standard. IEEE Trans. Circuits Syst. Video Technol. 22(12), 1649–1668 (2012)
The x265 website.https://bitbucket.org/multicoreware/x265/wiki/Home
Shen, L., Zhang, Z., An, P.: Fast CU size decision and mode decision algorithm for HEVC intra coding. IEEE Trans. Consum. Electron. 59(1), 207–213 (2013)
Shi, Y., et al.: Local saliency detection based fast mode decision for HEVC intra coding. In: IEEE 15th International Workshop on Multimedia Signal Processing (MMSP 2013). IEEE (2013)
Schroeder, D., Rehm, P., Steinbach, E.: Block structure reuse for multi-rate high efficiency video coding. In: IEEE International Conference on Image Processing (ICIP 2015). IEEE (2015)
Finstad, D.H., et al. Improved multi-rate video encoding. In: IEEE International Symposium on Multimedia (ISM 2011). IEEE (2011)
Chen, Y., et al.: Efficient software H. 264/AVC to HEVC transcoding on distributed multicore processors. IEEE Trans. Circuits Syst. Video Technol. 25(8), 1423–1434 (2015)
Zhang, J., Dai, F., Zhang, Y., Yan, C.: Efficient HEVC to H.264/AVC transcoding with fast intra mode decision. In: Li, S., Saddik, A., Wang, M., Mei, T., Sebe, N., Yan, S., Hong, R., Gurrin, C. (eds.) MMM 2013. LNCS, vol. 7732, pp. 295–306. Springer, Heidelberg (2013). doi:10.1007/978-3-642-35725-1_27
Bossen, F., et al.: HEVC complexity and implementation analysis. IEEE Trans. Circuits Syst. Video Technol. 22(12), 1685–1696 (2012)
Bjontegaard, Gisle: Improvements of the BD-PSNR model. ITU-T SG16 Q 6, p. 35 (2008)
Bjontegaard, Gisle: Calcuation of average PSNR differences between RD-curves. Doc. VCEG-M33 ITU-T Q6/16, Austin, TX, USA, 2–4 April 2001
Acknowledgement
This work was supported in part by National Natural Science Foundation of China (61133009, 61301116, 61221001), the Shanghai Key Laboratory of Digital Media Processing and Transmissions(STCSM 12DZ2272600).
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Cheng, D., Zhang, X., Gao, Z. (2017). Fast Intra Coding in an Efficient HEVC Multi-rate Encoding System Based on x265. In: Yang, X., Zhai, G. (eds) Digital TV and Wireless Multimedia Communication. IFTC 2016. Communications in Computer and Information Science, vol 685. Springer, Singapore. https://doi.org/10.1007/978-981-10-4211-9_30
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DOI: https://doi.org/10.1007/978-981-10-4211-9_30
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