Hollywood has unveiled a powerful new technology which it hopes will help kill the pirating of movies. The system relies on sound – not vision – and was unveiled at a conference held by the international DVD Forum in Paris, France last week.
All HD-DVD players will have a sensor that looks for inaudible watermarks in the soundtrack of movies. The watermarks will be included in the soundtracks of all major movies released to cinemas.
If a DVD player detects the telltale code, the disc must be an illegal copy made by copying a film print to video, or pointing a camcorder and microphone at a cinema screen. So the player refuses to play the disc.
http://www.newscientist.com/article.ns?id=dn8247&feedId=online-news_rss20