1. Intra Encoding Complexity Control with a Time-Cost Model for Versatile Video Coding
- Author
-
Huang, Yan, Xu, Jizheng, Zhang, Li, Zhao, Yan, and Song, Li
- Subjects
Electrical Engineering and Systems Science - Image and Video Processing - Abstract
For the latest video coding standard Versatile Video Coding (VVC), the encoding complexity is much higher than previous video coding standards to achieve a better coding efficiency, especially for intra coding. The complexity becomes a major barrier of its deployment and use. Even with many fast encoding algorithms, it is still practically important to control the encoding complexity to a given level. Inspired by rate control algorithms, we propose a scheme to precisely control the intra encoding complexity of VVC. In the proposed scheme, a Time-PlanarCost (viz. Time-Cost, or T-C) model is utilized for CTU encoding time estimation. By combining a set of predefined parameters and the T-C model, CTU-level complexity can be roughly controlled. Then to achieve a precise picture-level complexity control, a framework is constructed including uneven complexity pre-allocation, preset selection and feedback. Experimental results show that, for the challenging intra coding scenario, the complexity error quickly converges to under 3.21%, while keeping a reasonable time saving and rate-distortion (RD) performance. This proves the efficiency of the proposed methods., Comment: 5 pages, received VSPCTC Best Paper Award in ISCAS 2022
- Published
- 2022