The ease of accessibility of digital media and the simplicity of the digital systems has rendered the contents over the digital media highly insecure. Thus, content owners are eagerly seeking technologies having potential to protect their rights. Thus, the question of copyright associated with a digital entity for multimedia communication faces a severe threat from hackers. Engineers have accepted this challenge in a gallant way. Many data hiding techniques have been devised to protect the copyright of digital entities. The technique of digital watermarking is one of the growing fields in which this problem of copyright has been addressed elegantly.