A Review of Watermarking Application in Digital Cinema for Piracy Deterrence

Many pirated digital movies by camcorder capture are found on the Internet or on the street market before their official release. During piracy of cinema footage, composite geometric distortions commonly occur due to the angle of the camcorder relative to the screen. There are various research has been done to utilize the geometric distortions that will be occur during piracy in theatre to estimate the position of pirate in theatre via watermarking scheme followed by LACF (local auto correlation function). This paper present the notion of Watermarking and the features required to design a watermarked video for piracy deterrence. We review several methods, and introduce frequently used key techniques. The aim of this paper is to focus on the watermarking technique that is good for piracy deterrence. The majority of the reviewed methods based on watermarking emphasize on the notion of secure spread spectrum way of watermarking followed by LACF for estimating the position of pirate.