Research Article
VISUAL QUALITY CONTROL FOR PERCEPTUAL VIDEO ENCRYPTION WITH MULTIPLE TRANSFORMS
@INPROCEEDINGS{10.1109/ChinaCom.2012.6417473, author={Siu-Kei Au Yeung and Bing Zeng}, title={VISUAL QUALITY CONTROL FOR PERCEPTUAL VIDEO ENCRYPTION WITH MULTIPLE TRANSFORMS}, proceedings={7th International Conference on Communications and Networking in China}, publisher={IEEE}, proceedings_a={CHINACOM}, year={2012}, month={9}, keywords={perceptual video encryption quality control scheme pnsr and ssim}, doi={10.1109/ChinaCom.2012.6417473} }- Siu-Kei Au Yeung
Bing Zeng
Year: 2012
VISUAL QUALITY CONTROL FOR PERCEPTUAL VIDEO ENCRYPTION WITH MULTIPLE TRANSFORMS
CHINACOM
IEEE
DOI: 10.1109/ChinaCom.2012.6417473
Abstract
It has been demonstrated in our recent works [1-3] that perceptual video encryption can be effectively achieved by using multiple transforms alternatively according to a random key. In this paper, we introduce a simple but efficient quality control scheme into our encryption algorithm so that the video provider can choose the portion of visual content that is allowed to be disclosed to a un-subscriber for the preview purpose. The proposed scheme can be applied in three different levels during the video encoding: transform coefficients, block, and frame. Experiments are performed using the H.264 standard where two commonly-used quantitative metrics - PNSR and SSIM – are measured. The results show that the degraded visual quality can be controlled linearly with a simple quality factor at each of the three levels. Snap-shots are presented to show that the objective assessment matches the actual video quality.