http://www.theregister.co.uk/2013/10/07/security_for_4k_to_be_toughest_hurdle_to_climb_in_digital_video/
By Faultline
7th October 2013
Movielabs, the R&D business for Hollywood studios, has just issued a new
specification for securing 4K high-def streaming video content, and one of
the things that it’s going to demand is forensic watermarking.
This spec is being described as "recommendations", but studios will need
to adopt these overnight as the hard and fast rules if they want to gain
security approval to distribute quality 4K video.
A watermark has to be introduced in all 4K delivery, at the worst case at
the server streaming the content (so that each stream is unique), or
better still at the device. The latter will mean that the guilty party
customer can be identified from the source of any copy found on the
internet.
How it works
By now forensic watermarking is becoming tougher and tougher to break. In
some systems, the watermarking process writes a unique device number into
the content over a large number of frames in code, using key pixels, and
in others it is only measurement against a pristine version of the file
that reveals randomly placed pixels in a key coded sequence, which depict
the device or stream identity.
[...]
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