中文摘要：

在广播监视应用中，需要对视频片段进行认证．使用三维离散小波变换和中值量化方法，提出一种新的利用密钥生成鲁棒视频散列的算法．提出的散列算法对于视频编辑以及有损压缩都具有很好的鲁棒性．并在此基础上提出一种适用于广播监视的安全视频水印方案．该方案利用生成的散列值和版权标识形成待嵌入的水印信息，以实现对视频片段的认证．理论分析和实验结果表明，提出的算法具有较高的安全性和鲁棒性．

英文摘要：

Authentication of a video clip via its hash finds application in broadcast monitoring. For broadcast monitoring, a novel algorithm for computing a robust hash from video clips, being secret key based, is proposed based on the 3-D Discrete Wavelet Transform（3D-DWT） and median quantization. The proposed hash algorithm is shown to be remarkably robust against video modifications and lossy compression. On the basis of the video hashing, a secure video watermarking scheme for broadcast monitoring is put forward. In the proposed scheme, the short hash and copyright information are combined to create the embedding watermark. And they are used in the authentication of video clips. Some analyses and experimental results show that the proposed scheme has a good security and robustness.