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Audio Watermarks Could Pinpoint Film Pirates By Seat

Posted by timothy on from the also-look-for-the-glowing-red-lights dept.

Slatterz points out a brief mention at PC Authority of a story at Torrent freak about using watermarking embedded in movies' soundtracks to reveal the exact location of camera-wielding bootleggers in a theater; the inventors (here's an abstract of their paper) claim it's accurate to within 44 centimeters.

2 of 336 comments (clear)

  1. That will not work. Pirates will use FM feed. by tepples · · Score: 5, Interesting

    Most cinemas that I've been to lately have micro-power FM transmitters that broadcast the audio in each screening room, for the benefit of people with hearing impairment who bring their own radios and listen on headphones. If the pirates were to use audio from this FM feed, the camera could be anywhere in the room and nobody would know.

  2. Re:Useless Information by Firehed · · Score: 5, Interesting

    They've been doing that for quite a while, actually. Ever seen a bunch of red dots flash onscreen for a frame a couple times during a movie? (if not, you will now - sorry) Those are to determine what theatre a leaked cam copy came from.

    --
    How are sites slashdotted when nobody reads TFAs?