4 February 2009 Digital watermarking for digital cinema
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Abstract
Changing the distribution channel of movies from analogue to digital provides new perspectives and possibilities for applying digital watermarking as security mechanisms. Digital watermarking provides its best security options when used for individual marking of copies to trace back distribution leaks. For analogue copies, protecting movies with individual watermarks was only cost-effective for small sets of copies as in promotional copies as duplication is done in an automated photo-optical way. Modifications of the analogue copies only provide relatively crude approaches of individual marking. Digital copies on the other hand can easily be modified before, during or even after distribution to cinemas. It is also possible to embed watermarks at all of these stages to secure the complete distribution chain from studio to cinema. In our paper we discuss two watermarking strategies suitable for different applications in the digital cinema domain, video and still image watermarking. We provide technical background and also discuss the interference of applying both algorithms at the same time.
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Stefan Thiemert, Stefan Thiemert, Martin Steinebach, Martin Steinebach, Huajian Liu, Huajian Liu, "Digital watermarking for digital cinema", Proc. SPIE 7254, Media Forensics and Security, 72540V (4 February 2009); doi: 10.1117/12.816490; https://doi.org/10.1117/12.816490
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