TY - GEN
T1 - Visual quality control for perceptual video encryption with multiple transforms
AU - Au Yeung, Siu Kei
AU - Zeng, Bing
PY - 2012
Y1 - 2012
N2 - 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.
AB - 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.
UR - https://www.scopus.com/pages/publications/84874252333
U2 - 10.1109/ChinaCom.2012.6417473
DO - 10.1109/ChinaCom.2012.6417473
M3 - Conference contribution
AN - SCOPUS:84874252333
SN - 9781467326995
T3 - 2012 7th International ICST Conference on Communications and Networking in China, CHINACOM 2012 - Proceedings
SP - 189
EP - 192
BT - 2012 7th International ICST Conference on Communications and Networking in China, CHINACOM 2012 - Proceedings
T2 - 2012 7th International ICST Conference on Communications and Networking in China, CHINACOM 2012
Y2 - 7 August 2012 through 10 August 2012
ER -