Adaptive bit allocation for hierarchical B pictures rate control algorithm in H.264/SVC

For reducing the variation between the actual bit rate,and target bit rate and improving the coding quality at the last coding frames,this paper proposed a new rate control algorithm to compensate the original rate control algorithm for SVC.Based on the correlation between frames and consideration of constant coding quality,it allocated bits evenly between GOPs(group of pictures).Besides,inside a GOP,it proposed an adaptive bit allocation on frame level based on coding complexity.Furthermore,taking appropriate adjustments on initial QP,then it calculated QPs for both P frames and B frames based on target bit respectively.Experiments on different video sequences show that the proposed algorithm is accurate and effective.