快速帧内预测方法

Fast Intra Prediction Algorithm Applied in H.264/AVC

为了进一步提高编码的效率,提出了一种基于离散余弦变换(discrete cosine transform,简称DCT)的能量函数的快速Intra-4×4模式选择算法.该算法通过估计帧内预测残差的纹理复杂度达到减少进行率失真最优化计算的模式数量.实验结果表明,该算法在保持原有编码效率的基础上能节省约一半的编码时间.

In achieve a high compression ratio,the authors proposed order to a DCT-based energy function,which is used to estimate the textural complexity of residual blocks of intra prediction.Then no more than 4 modes instead of 9 intra prediction modes for 4×4 block can be chosen to perform RDO according to the textural complexity of residual block.Consequently,the complexity decreases significantly.Experiments show that the proposed algorithm can save about 48% of the computation time stably while maintaining the ...