Motion Adaptive Intra Refresh for Low Delay HEVC Encoding


Low delay video coding is a critical technology for real-time applications. The method of periodic intra refresh (PIR) can obtain the low delay effect by embedding the intra-coding columns or slices into inter frames (e.g. P or B frames). However, due to the diversity of video motion direction, this method still cannot achieve the optimal coding performance. In this paper, we propose a motion adaptive intra refresh method, which can choose the optimal refresh direction adaptively according to the video motion direction. Experimental results show that the proposed scheme can achieve 2.2% and 2.5% BD-rate gain in average compared with the periodic intra refresh method for PSNR and SSIM, respectively, with a similar low delay effect under the low delay P configuration in HM16.14. At the same time, the encoding time ratio is 99.85%, which means the time complexity of the two algorithms remains at the same level.

Digital TV and Multimedia Communication
Li Song
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.