Abstract:

Traditional frameskipping strategies in H.264 rate control algorithm use buffer occupancy and image complexity as a criterion. Although complexity can reflect the motion, it cannot reflect the temporal relationship between the current frame and previous frames, leading to low encoding quality. To address this problem, we improve it from two aspects. First, Complexity is replaced with relative complexity, so that the temporal dependency relationship can be better characterized. Second, bit factor is introduced to establish a comprehensive frameskipping measure along with buffer occupancy and relative complexity. Experimental results show that our optimization has higher PSNR and the video behaves better in continuity.

Key words: video coding;rate control;frame skipping;relative complexity;bit factor