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中文摘要：
H．264标准对网络传输具有了更好的支持功能，在此标准下进行水印技术的研究对于网络视频传输过程中的版权保护有着重要的意义。为此，提出了一种在网络视频流中选择I帧，再在I帧中修改较大色度块DC系数来隐藏版权信息的视频水印算法，该算法在检测水印时不需要原始视频序列因而具有盲检测性。实验结果表明在应对反复压缩、加载噪声、裁切、帧删节、格式转换等多种攻击时显示出较强的鲁棒性，有一定的理论和实际应用价值。
英文摘要：
standard has watermarking H. 264 standard for network transmission with a better support, research of watermarking on this important effects on copyright protection in the network video transmission. Consequently, a arithmetic is put forwird which embeds watermarking by adjusting DC coegicients in large new video blocks of I frame which chose from the video streaming. The arithmetic doesn＇t need original video image when detecting water- marking so that it is a blind detection. Experiments indicate that arithmetic has a strong robustness to many attack schemes, such as multiple compression, noise attacks, frame delete, format conversion. There is some theoretical and practicality on copyright protection in the network video transmission.
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