It does it on the very same little MiniDV tapes that other digital camcorders use for capturing standard-definition fare, yet manages to cram 60 minutes of high-def onto a standard one-hour cassette.
Having spent three decades presenting Shakespeare and Shaw in the Up-the-Hill Theatre, APT wisely opted to use the Touchstone to broaden its repertory with modern fare.
But NXP has found a way to amplify these flaws in a controlled way and use them for identification, and it'd take a mightily well-equipped criminal (or fare dodger, or Scrabble cheater) to reverse engineer that.