Inter-Frame Dependency-Based Rate Control for VVC Low-Delay Coding
Hewei Liu, Shuyuan Zhu, Bing Zeng
Abstract
In this letter, we propose two solutions for the rate control of the VVC low-delay coding. Both solutions are developed by determining the bit allocation factors for video frames based on their dependency. Specifically, we design the first solution according to the distortion correlation between the key-frame and its subsequent frames. With this solution, the bit allocation factors are determined by applying multi-pass coding on the video to build up the cross-frame distortion model. This model offers us a straightforward way to achieve better rate control performance but results in a rather high complexity. To solve the complexity problem, we propose the second solution based on the difference between frames. In this solution, we construct the bit allocation model and apply it to frames so that we can adaptively determine the allocation factors with a low complexity. The experimental results demonstrate that our proposed two solutions can offer better rate-distortion performances than the state-of-the-art method.