Motion Adaptive Intra Refresh for Low Delay HEVC Encoding

Abstract

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.

Publication
Digital TV and Multimedia Communication
Zhaoliang Ma
Zhaoliang Ma
Master Student
Li Song
Li Song
Professor, IEEE Senior Member