Smart selective encryption of H.264/AVC videos using confidentiality metrics

被引:4
作者
Dubois, L. [1 ]
Puech, W. [1 ]
Blanc-Talon, J. [2 ]
机构
[1] Univ Montpellier 2, CNRS, UMR 5506, LIRMM Lab, F-34095 Montpellier 05, France
[2] DGA, F-92221 Bagneux, France
关键词
Selective encryption; H.264/AVC; Psychovisual metrics; Flickering; Visual confidentiality;
D O I
10.1007/s12243-013-0413-4
中图分类号
TN [电子技术、通信技术];
学科分类号
0809 ;
摘要
In the field of video protection, selective encryption (SE) is a scheme which ensures the visual security of a video by encrypting only a small part of the data. This paper presents a new SE algorithm for H.264/AVC videos in context-adaptive variable-length coding mode. This algorithm controls the amount of encrypted alternative coefficients (ACs) of the integer transform in the entropic encoder. Two visual quality measures, the peak signal-to-noise ratio (PSNR) and the structural similarity (SSIM), are used to measure the visual confidentiality level of each video frame and to control the amount of encrypted ACs. Moreover, a new psychovisual metric to measure the flickering is introduced, the so-called temporal structural similarity (TSSIM). This method can be applied on intra and inter frame video sequences. Several experimental results show the efficiency of the proposed method.
引用
收藏
页码:569 / 583
页数:15
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