基于H.264空时SVC编码的快速模式决策算法

Fast mode decision algorithm within H.264 spatial and temporal scalable video coding

提出一种简单可行的快速模式决策算法,该算法利用空域和时域分级视频编码的宏块模式相关特性,选取参考帧宏块中率失真代价较小的一部分已用模式作为当前宏块的候选模式,使得增强层的运动预测计算量大大降低。实验结果表明,该算法能够在峰值信噪比损失不大的情况下,有效地减少编码时间。

By exploiting the macroblock correlation in spatial and temporal scalable video coding,a fast mode decision algorithm was proposed.It chooses a part of the used search modes from the co-located reference macroblocks to compose the candidate group for the current macroblock.This will extremely reduce the calculation amount of motion estimation in enhancement layers.According to the experimental results,this algorithm decreases the encoding time with the negligible coding loss and bit-rate increases.