Abstract
In this paper, we propose a temporal dependent bit allocation scheme for rate control in state-of-the-art High Efficiency Video Coding (HEVC) standard, to improve its coding performance by utilizing the temporal correlation information. In typical rate control scheme, the bit is allocated to different Coding Tree Units (CTUs) according to their complexity, which reflect their texture and motion information in some degree. However, this scheme ignores the temporal correlation between different frames, which leads to the bit allocation is not the optimal for the whole sequence. Therefore, we refine the bit allocation by taking into account temporal information, especially different coding units’ distortion influence on the future frames. The result shows that under the same rate control performance, proposed scheme can effectively improve the coding quality performance, especially the Structure Similarity (SSIM) quality performance, the subjective assesment also shows very well.
Li Song
Professor, IEEE Senior Member
Professor, Doctoral Supervisor, the Deputy Director of the Institute of Image Communication and Network Engineering of Shanghai Jiao Tong University, the Double-Appointed Professor of the Institute of Artificial Intelligence and the Collaborative Innovation Center of Future Media Network, the Deputy Secretary-General of the China Video User Experience Alliance and head of the standards group.