An Improved Rate Control for Video Communication of H.264 Standard

In this paper, we propose an improved rate control scheme for low delay H.264 video coding. A fast and best selection of initial QP is first proposed in the GOP layer rate control. Then, an improved MAD prediction model and overhead bits prediction method is adopted in the MB layer rate control. The simulation results show that the proposed scheme gives an average PSNRY gain of about 0.55 dB when compared with JVT-G012.In addition, the proposed scheme improves the number of frame skipped and reduces the quality deviations of the initial frames by choosing the best initial QP.