Abstract
The latest generation of coding standard, Versatile Video Coding (VVC), has achieved more bitrate reduction compared with high efficiency video coding. However, the introduction of quadtree with nested Multi-Type Tree (MTT) coding structure greatly increases the computational complexity. To reduce the complexity of VVC, a Support Vector Machine (SVM) based Coding Unit (CU) size decision algorithm is presented. Firstly, effective features, derived from entropy, texture contrast, and Haar wavelet efficient of current CU, are select to distinguish the splitting directions. Then, the six SVM classifying models are on-line trained at different CU sizes. Finally, the models are utilized to prediction the direction of CU splitting in the quadtree with nested MTT coding structure. Experimental results show that the proposed algorithm can significantly save the encoding time by 51.01% with slight increase of Bjontegaard delta bit rate.
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Acknowledgments
This work was supported by the National Natural Science Foundation of China under Grant Nos. 61771269, 61620106012, and 61871247, the Natural Science Foundation of Zhejiang Province under No. LY20F010005, the Natural Science Foundation of Ningbo under Nos. 2018A610052 and 2019A610107, and the K. C. Wong Magna Fund in Ningbo University.
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Chen, F., Ren, Y., Peng, Z. et al. A fast CU size decision algorithm for VVC intra prediction based on support vector machine. Multimed Tools Appl 79, 27923–27939 (2020). https://doi.org/10.1007/s11042-020-09401-8
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DOI: https://doi.org/10.1007/s11042-020-09401-8