Watermarking algorithm based on 3G video
Caihong Zhang · Jisuanji gongcheng yu sheji · 2011
Aiming at the problems of the features of 3G video coding standard and real-time,a robustness video watermark algorithm based on DC coefficients of chroma block is presented.The two-dimensional Arnold image scrambling is designed firstly,according to calculating the brightness of the I frame video sequence to determine the embedded frame,then calculating the average value and variance of chroma block,embedded the scrambled watermark information into the quantized DC coefficients of chroma block,this algorithm has blind detection.The experimental results show that this algorithm has a very good invisibility as well as easy realized which meet real-time.After shearing and some other video processing,the NC level is over 0.85 with good robustness.Meanwhile,the selectivity of embedded position makes it harder for attacker to sense attack target,so it makes better safety.