基于统计分析的H.264快速模式选择算法

Fast Decision Algorithm for H.264 Based on Statistic and Texture Prediction

为了提高H.264算法的效率,在对各种模式进行统计分析的基础上,针对SKIP模式,提出一种将SKIP模式与inter16×16模式的率失真代价进行比较的快速判决算法;针对inter8×8模式,提出了一种基于纹理预测的快速选择算法;针对intra4×4模式,提出了一种简化算法。实验结果显示,相对与JM 8.6参考软件,PSNR平均下降0.05 dB左右,而编码时间平均下降38%,由此说明此算法能有效地提高H.264的编码效率。

To improve H. 264 algorithm,based on statistic for the appearance probability of all the modes in the whole sequence,for SKIP mode,a fast decision algorithm,which is to compare the RD cost of SKIP with interl6 × 16 modes is proposed. For inter8 ×8, a fast selection algorithm based on texture prediction is proposed. For intra4 ×4, a simple algorithm is given, the results show that it reduced time by 38% on average while PSNR just reduced nearly 0.05 dB, compared with JM 8.6,thus above method is efficient for H. 264 algorithm.