H.264 SVC层间预测选择快速算法

针对H.264 SVC采用层间预测编码工具而引起的高计算复杂度问题,提出H.264 SVC层间预测选择快速算法.在层间残差预测方面,先作一次运动搜索,估计宏块在2种层间残差预测选择结果之间的模式代价比,利用该模式代价比预测残差数据对增强层宏块编码的影响,从而快速选择层间残差预测.在层间运动预测方面,利用宏块的运动信息和模式代价信息来快速选择层间运动预测.实验结果表明,与参考算法相比,该算法在同等质量条件下,编码速度平均提高了30%左右.该算法可以与模式选择快速算法结合使用,进一步提高编码速度．

Fast inter-layer prediction algorithm for scalable video coding

The scalable video coding(SVC) uses the inter-layer prediction tool to explore the redundancy between the video layers,which results in much higher computational complexity.A novel fast inter-layer prediction algorithm was proposed for SVC.For the inter-layer residual prediction,the effect of the reference layer’s residual data upon the enhancement layer’s coding was predicted by estimating the mode-cost-rate in advance.Then the choice of inter-layer residual prediction was decided based on the estimated mode-cost-rate.For the inter-layer motion prediction,both the motion vector information and the mode cost information were employed to decide the inter-layer motion prediction.The algorithm can reduce the encoding time by 30% on average with negligible loss of quality compared with the reference algorithm.The algorithm can be flexibly combined with other fast mode decision algorithm and further accelerate the coding performance.