13-09-2017, 01:26 PM
Digital video theft is a growing crime. Nowadays, there are torrent sites that hold copies of movies, sometimes months before their DVD / Bluray release. This is especially seen before the awards seasons (such as Oscars, Golden Globes, etc.). The adjudicators are given free copies of the movies, and often end up on torrent sites. Video watermarking is an extremely useful tool for identifying theft. Once a single image is embedded in a video, (in a selected number of frames), it becomes a single copy. Since the embedding takes place on some of the (lower) frequency waves, it is impossible for the viewer to see a significant difference in any part of the video. In addition, without access to the original video and frame numbers where the embedding has been done, it is almost impossible to remove the watermark from the video as well. The DWT watermark of a video is known to be very robust against many known attacks, and therefore, there is a very good likelihood that the copy can be identified even after the distortion.
It can be understood in the following video:
It can be understood in the following video: