H.264帧内快速预测算法的研究

新一代视频压缩标准H.264/AVC使用率失真优化算法在提高压缩率的同时增加了计算复杂度。为了减少计算复杂度,提出了一种快速帧内预测算法。通过MAD（平均绝对误差）均值对宏块进行4×4块和16×16块预判,再根据SATD（残差绝对值总和）代价函数计算Cost值,排除较小可能性的模式,缩小4×4块的预测模式范围。用标准视频序列对该算法验证,结果表明该算法在保证峰值信噪比的前提下,节省了预测时间.

A Fast H.264 Intra Prediction Algorithm

H.264/AVC is a new generation of video coding standard.It makes use of rate distortion optimization algorithm to improve the efficiency of compression,but the computational complexity of encoding increases dramatically.To reduce computational complexity,the paper presents a new intra prediction algorithm selection.This algorithm makes use of MAD（Mean Absolute Differences） value to predict 4×4 macro blocks or 16×16 macro blocks,then reduces the forecast model of 4×4 macro blocks according to SATD（Sum of Absolute Transformed Difference）Features.According to Experiment results,the premise of ensuring PSNR prediction time is saved effectively..