Watermarking methods for MPEG encoded video: towards resolving rightful ownership

Various digital watermarking techniques have been proposed in recent years as the methods to protect the copyright of multimedia data. However, the rightful ownership problem has not been properly solved. Currently, there are two proposals to solve the ownership problem. Unfortunately, one proposal lacks a formal proof and the other can be easily defeated. We present watermarking methods which will be successful in resolving rightful ownership of watermarked MPEG video. By introducing specific requirements in the watermark construction, the proposed scheme is proved to be non invertible. We show the invertibility of those schemes which do not use the original in its verification, discuss in depth various issues of the watermark construction requirements, extend the basic idea to create a non invertible scheme for image, and discuss the usage of different non invertible schemes.