随着网络和多媒体技术的飞速发展,视频数据的安全问题越来越突出。深入探讨了视频数据在空域、频域以及运动矢量上的置乱策略与方法。对如何提高置乱方法的安全强度,以及如何降低置乱对编码效率与视频图像质量的影响进行了详细分析,提出了置乱应遵循的原则。在此基础上,改进现有的算法,并通过实验进行了验证。实验结果表明,基于频域与运动矢量相结合的视频置乱策略与方法具有更强的安全性。与传统数据加密方法不同,置乱方法能够与视频编解码进行紧密的结合。

With considerable development of the network and multimedia technology,the security problem of the video data becomes more urgent.In this paper,the scrambling strategy and methods to hide the video data are discussed deeply in the spatial and frequency domains,followed by the security of these methods and the principles of the scrambling.The means to increase the security of the scrambling methods and reduce the influence of compression efficiency and video quality due to the scrambling are analyzed in details.Based on these,the existing methods are improved in the experiments.The experimental results show that the combination of spatial and frequency domain methods enhances the security of video data.Differing from the traditional encryption methods,these scrambling methods being proposed can be embedded into the video encoding and decoding processes compactly.