EMBEDDING SUPPLEMENTAL DATA IN A DIGITAL VIDEO SIGNAL

摘要

Method of embedding a watermark in an MPEG encoded video signal. An MPEG encoded video signal includes groups of pictures (GOPs), each GOP comprising an intraframe coded (I) picture and a series of predictively encoded (P) pictures and bidirectionally predictively (B) pictures. Usually, the GOP structure IBBPBBP... is used. In accordance with the invention, the video signal is watermarked by forcing the MPEG encoder to produce a GOP structure which does normally not occur, e.g. a GOP including a BPP sequence. Different symbol values can be assigned to different positions of the BPP sequence in the GOP.