H.264提供了4×4的亮度块帧内预测,其共有9种预测模式。在判断其预测模式中要求4×4块的每种预测模式都要判断,因此计算复杂度很高。有效减少4×4块预测模式的判断次数,在实时视频编码过程中很有价值。基于此,提出了一种帧内4×4块预测模式判断提前退出的优化算法,并对其进行了试验,得到了很好的效果。 H.264 provides 4 × 4 luma block intra prediction, which has a total of 9 kinds of prediction modes. Each prediction mode that requires 4 × 4 blocks in its prediction mode needs to be judged, so the computational complexity is high. Effectively reduce the number of 4 × 4 prediction mode of judgment, in the real-time video coding process is valuable. Based on this, an optimization algorithm for early prediction of intra 4 × 4 block prediction mode is proposed and tested, and good results are obtained.