arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2011.02620cs.MMcs.LG
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一种用于加密H.265/ HEVC视频的具有视觉信息的多级方法

A multi-level approach with visual information for encrypted H.265/HEVC videos

Jiangxi University of Finance and Economics(江西财经大学);Nanjing University of Aeronautics and Astronautics(南京航空航天大学)

Wenying Wen, Rongxin Tu, Yushu Zhang, Yuming Fang, Yong Yang

摘要:

已提出高效视频译码(HEVC)加密以出于视频加密的目的而加密语法元素。为了实现高视频安全性,据我们所知,几乎所有现有的HEVC加密算法都主要对整个视频进行加密,使得没有权限的用户无法获得任何可观看的信息。然而,这些加密算法不能满足需要部分信息而不是视频中的全部信息的客户的需求。在很多情况下,比如专业的付费视频或者视频会议,用户希望在加密视频中观察到一些原始视频的可见信息,以满足日常生活中的需求。针对这一需求,提出了一种由轻量级加密、中等加密和重量级加密组成的多级加密方案,每个加密级别可以获取不同数量的可视信息。研究发现,对亮度帧内预测模型(IPM)进行加密和对DCT系数符号的语法元素进行置乱都可以获得失真视频的性能,但仍有残留的视觉信息,而对IPM和DCT系数符号的语法元素进行加密可以实现加密的强度,并且不能获得任何视觉信息。实验结果符合我们的预期,表明在每个加密级别中有不同数量的视觉信息。同时,用户可以根据自己的不同需求灵活选择加密级别。

英文摘要:

High-efficiency video coding (HEVC) encryption has been proposed to encrypt syntax elements for the purpose of video encryption. To achieve high video security, to the best of our knowledge, almost all of the existing HEVC encryption algorithms mainly encrypt the whole video, such that the user without permissions cannot obtain any viewable information. However, these encryption algorithms cannot meet the needs of customers who need part of the information but not the full information in the video. In many cases, such as professional paid videos or video meetings, users would like to observe some visible information in the encrypted video of the original video to satisfy their requirements in daily life. Aiming at this demand, this paper proposes a multi-level encryption scheme that is composed of lightweight encryption, medium encryption and heavyweight encryption, where each encryption level can obtain a different amount of visual information. It is found that both encrypting the luma intraprediction model (IPM) and scrambling the syntax element of the DCT coefficient sign can achieve the performance of a distorted video in which there is still residual visual information, while encrypting both of them can implement the intensity of encryption and one cannot gain any visual information. The experimental results meet our expectations appropriately, indicating that there is a different amount of visual information in each encryption level. Meanwhile, users can flexibly choose the encryption level according to their various requirements.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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