Advent of multimedia communication over internet makes huge scope for the technologies like
video on demand, digital television, digital versatile disks etc. The performance of these modern
technologies depend not only on efficient video communication but corresponding security issues.
Unfortunately digital piracy, video forgeries are increasing threats over the video communication
technologies.
Digital video watermarking is a technique which inserts a digital signature into
the video stream which can be extracted or computed to authenticate the ownership of the media
or the media itself. One of the challenging issue for video watermarking is robustness against different types
of attacks without degrading visual quality. In very low bit rate video, since the differential coefficients
are very sparse, finding suitable watermarking zone is a challenging task. The spatio-temporal analysis for
searching suitable watermarking zone become more accurate within a video shot since inter-frame correlation is
high within a shot. Currently, a object based watermarking within a video shot is proposed to resist geometric attacks.
The object with motion is detected in compressed domain and watermark is inserted to that object for this purpose