Adaptive video watermark using block QP

Robustness and invisibility are all important points in video watermarking technology. In this paper, we propose the new scheme to increase the robustness and retain the invisibility as good. Through the experiment, we get the linear curve relationship between QP values and watermark strength values, and using that relationship, we get the better detection rate increased by 7%~14%. In spite of increasing the performance, we have still good invisibility which is checked by subjective test.