Robust Video Concealment Based on Differential Energy Modulation
Lihong Ma · 2010
To deal with the drawbacks of differential energy watermarking(DEW) algorithm such as its poor transparence,low capacity and weak robustness,we propose a blind video watermarking scheme related to differential energy modulation(DEM).It chooses the embedded regions of a quantized block,and labels a hiding bit by dithering differential energy between the horizontal and the vertical sub-regions of that block,with an adaptive quantized index modulation(QIM) method.To assure transparence and robustness,the embedded error is spread over 10 biggest coefficients of each host block.The perceptual quality and the length of an original sequence could also be kept unchanged owing to its similitude codeword replacement.Experiments demonstrate that DEM is superior to DEW in the performance of transparence,capacity,robustness and rate maintenance.At the same time it achieves a better robustness than QIM,for QIM carries one bit in one coefficient,whereas DEM embeds one bit in one region.