多媒体视频图像信息传输安全性能研究

发布时间：2018-03-31 02:27

本文选题：多媒体　切入点：视频图像　出处：《计算机仿真》2017年11期

【摘要】：对多媒体视频图像信息传输安全性问题的研究,能够有效保护视频图像信息。对视频图像信息传输安全性的研究,需要对图像进行高效加密,利用密钥流机制量化新序列。传统方法改变视频图像加密控制参数,将图像块进行扩散处理,但忽略了利用密钥流机制量化新序列,导致图像加密精度偏低。提出基于双向扩散机制融合时间延迟的多媒体视频图像高效加密算法。上述图像感兴趣区域原理,定义视频图像显著像素选取机制,将多媒体视频图像像素划分为显著像素和次要像素,构成显著像素矩阵,将时间延迟引入到多媒体视频图像显著像素超混沌序列中,采用位置集合置乱算法对该序列所得显著像素位置集合图像重新设置,利用密钥流机制量化新序列,通过双向扩散机制加密视频图像,实现加密视频图像实时传输。实验结果表明,所提算法加密机制较为安全,密钥空间较大。
[Abstract]:The research on the security of multimedia video image information transmission can effectively protect the video image information. In order to study the security of video image information transmission, it is necessary to encrypt the image efficiently. The new sequence is quantized by using the key-stream mechanism. The traditional method changes the parameters of the encryption control of the video image and diffuses the image blocks, but neglects the quantization of the new sequence by using the key-stream mechanism. Because of the low precision of image encryption, an efficient encryption algorithm for multimedia video image based on bidirectional diffusion mechanism, fusion time delay, is proposed. The region of interest (ROI) principle is described above, and the mechanism of selecting salient pixels of video image is defined. The pixels of multimedia video images are divided into significant pixels and secondary pixels to form a significant pixel matrix, and the time delay is introduced into the hyperchaotic sequence of significant pixels of multimedia video images. The location set scrambling algorithm is used to reset the salient pixel position set image, the new sequence is quantized by the key stream mechanism, and the video image is encrypted by the bidirectional diffusion mechanism. Experimental results show that the proposed algorithm is more secure and has a large key space.
【作者单位】：广东外语外贸大学南国商学院;
【基金】：超声速飞行器气动光学效应红外图像复原理论与方法(61175120) 广东省青年创新人才项目(2015KQNCX199)
【分类号】：TP309.7

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