一种H.264/AVC中帧内快速预测方法研究

An intra-prediction mode selection fast algorithm of H.264/AVC

文章详细分析了H.264/AVC中帧内预测的模式选择过程,并且提出一种快速的Intra_4×4模式选择算法。该算法根据相邻块预测模式相关性及各预测模式的相关性在计算RD_cost前先对帧内9种模式进行预判断,选择与最可能模式相关的模式作为候选模式,可预先避免计算超过50%的可能性小的模式,从而使帧内预测的复杂度降低,同时基本保持了H.264/AVC的编码性能。

A new Intra 4×4 mode selection algorithm was proposed in this paper after analyzing the process of intra-prediction based on rate distortion optimization（RDO）entailed in H.264. It used correlation of the prediction mode between current block and adjacent blocks, correlation of the prediction modes, to chose the correlation mode of most probable mode （MPM） to fiher out more than 50% less probable mode beforehand to avoid unnecessary computations. The algorithm reduces the intra-prediction complexity greatly while maintaining coding performance very well.