Digital Watermark for Videos

In the present era of information technology and rapid transmission of multimedia content, the internet is increasingly playing an important role in the offering of multimedia resources through digital networks. Digital media has disadvantage of being prone to easy illegal copying methods such as tampering, piracy, fraud and counterfeiting. Video watermarking is process of inserting watermarks in a video sequence in order to protect the video from illegal copying and identify manipulations. Due to inherent redundancies between frames video signals are commonly affected by frame dropping attacks. Since the main aspects of information hiding are capacity security and robustness. Digital watermarks are helpful in various applications like copyright management, content authentication, fingerprinting, tamper detection and broadcast monitoring. Many digital watermarking algorithms have been proposed in spatial and transform domains. Spatial domain techniques are very simple requires low computational complexities but still have relatively low-bit capacity and are not resistant enough to image processing operations.