A Robust and Transparent Digital Video Watermark Scheme
few of current digital video watermark schemes can have both strong robustness and transparency.In this paper,a scheme which can achieve this goal was proposed.In embed process first watermark information was encode by spitted,added synchronization information,spread Spectrum and scrambling.Then encoded watermark information was embedded into 8*8 DCT domains by change the coefficient of point (5,2) and (4,3) and the change weight is calculated according to the Watson models.The first step of extract process comes from DCT coefficient of each 8*8 block in current frame.The relationship between two points which are changed in embed process defines the original information extracted from current frame.Then the extracted information was decoded by inverse scrambling,inverse spectrum,calculate the correction with synchronization information and record information.At last,vote detection was applied to detect the final watermark information.The experimental result shows this watermark was transparency and can resist resolution change,format change,bit rate change and frame rate change.
video watermark DCT robust transparency
Yujie.Ma Kaiguo.Yuan Chunhua.Wu
Information Security Center, Beijing University of Posts and Telecommunications
国内会议
北京
英文
73-79
2012-11-01（万方平台首次上网日期，不代表论文的发表时间）