中文摘要：

根据秘密图像共享的有关理论，提出了一种Simmons门限方案的H．264视频水印方案。首先水印图像分割为n份隐蔽图像，其中任意t份（t〈n）可恢复出原始水印信息。然后将t份子份额嵌入到视频序列的不同亮度帧中，可提高水印算法的鲁棒性，能有效抵抗帧删除攻击。最后提出一种在h．264帧内亮度预测模式下减少误差积累的算法，针对帧内亮度预测模式的特性，能有效选取的水印嵌入位置，减少水印嵌入产生的误差累积。

英文摘要：

According to the theory of secret image sharing, a H. 264 video watermarking algorithm based on the Simmons （t, n） threshold theory was proposed. In the algorithm, the original watermark image was divided into n se- cret images. Any t secret images （t〈n） can be used to restore the original watermark information. To resist the frame deletion attack, t secret images were embedded in different luma frames. Besides, another algorithm was proposed in this paper in order to reduce error drift in h. 264 intra luma prediction mode. This algorithm can be used to effectively select the watermark embedding position to reduce the error drift.