Watching Videos with Certain and Constant Quality: PID-based Quality Control Method
This addresses video coding quality control for applications requiring stable video quality, but it appears incremental as it builds on existing PID control concepts.
The paper tackles the problem of ensuring compressed videos have certain and constant quality to improve quality of experience by proposing a PID-based quality control method, which experimental results show is effective in control accuracy and quality fluctuation.
In video coding, compressed videos with certain and constant quality can ensure quality of experience (QoE). To this end, we propose in this paper a novel PID-based quality control (PQC) method for video coding. Specifically, a formulation is modelled to control quality of video coding with two objectives: minimizing control error and quality fluctuation. Then, we apply the Laplace domain analysis to model the relationship between quantization parameter (QP) and control error in this formulation. Given the relationship between QP and control error, we propose a solution to the PQC formulation, such that videos can be compressed at certain and constant quality. Finally, experimental results show that our PQC method is effective in both control accuracy and quality fluctuation.