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基于H.264的帧间预测快速算法

DOI: 10.11834/jig.2005011245

Keywords: 视频编码,H.264,帧间预测,快速算法

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Abstract:

为了快速地进行运动估计,针对H.264帧间编码全搜索的计算复杂度太高,不能应用于实时处理的缺点,本文实现了一种适合于H.264的快速搜索算法。该算法针对H.264多预测模式的特点,利用其相互间的相关性来确定预测点;同时利用运动图像的一般规律来确定预测点,从而使得预测点的确定时间得以减少。在预测点确定后再用钻石算法搜索,这使得整个帧间预测时间大为缩短。实验结果表明,该算法能够在码率增加不超过1%,信噪比(signalnoiseratio,SNR)下降不超过0.1dB的情况下,使得运动估计速度提高将近65%。

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