Re: [WM]: [WM] Protecting from screen capture

["Jeffrey Bloom" <jbloom@sarnoff.com>]

Mary-Lynne,

This sounds like a wonderful "out of the box" approach.  If the goal is the prevention of camcorder capture, this psychological
approach is very interesting.  Although I wonder how it would effect the professional pirates.  There are technical approaches for
interfering with the camcorder itself.  People have experimented with IR flooding to confuse the remote control of the camcorder.
Others have looked at projecting signals, similar to what you've suggested, but ones that will interfere with the camcorder capture
so as to degrade the quality of the captured video.  Others play with the colors.  The goal is to exploit the differences between
the way the HVS captures imagery and the way camcorders do it: temporal sampling rate, spatial sampling rate, persistence, color
quantization, etc.

Here's a link to the announcement of one such program.

http://jazz.nist.gov/atpcf/prjbriefs/prjbrief.cfm?ProjectNumber=00-00-5237

- Jeffrey

At 11:34 PM 12/8/2004 +0200, MARY LYNNE HALLOT wrote:
>Dear J. Bloom, I have an idea and I hope it will help.
>In 1956 N.J. movie theater flashed subliminal messages, "Hungry? Eat 
>popcorn. Drink Coca-Cola."
>This increased popcorn sales 58% and Coca-Cola sales 18% but results 
>were not replicated as it was felt that people were subliminally 
>affected and had no choice in the matter. Psychological warfare it was 
>coined and this law was forbidden to be used. Maybe you could put this 
>idea to good use by ensuring that a message is flashed in the movie at 
>every specific time frame asking people to refrain from illegally 
>copying movies. This could be done in a psychologically intelligent 
>manner which would not disempower the person doing the illegal 
>activity, unyet could plead with their sense of only copying what they 
>themselves create. Research could be done into this line of activity. 
>Using the law and psychologists in colloboration with computer 
>scientist and graphic Designers. I hope this helps. You have always 
>been good to me and gone out of your way to aid me. Thank you. I have 
>other ideas, but I would rather wait incase my ideas are too over the top.
>Regards
>
>Mary-Lynne H'allot;
>PhD Student;
>Computer Science Department;
>University of the Western Cape
>http://www.cs.uwc.ac.za/~charlie/
> >>> "Jeffrey Bloom" <jbloom@sarnoff.com> 12/08/04 17:17 PM >>>
>
>At 06:48 PM 12/8/2004 +0800, Babu, Mandava wrote:
>
> >Hi All,
> >
> >Can some one give me pointers to find the relevant documents or 
> >technology which talks about protecting the illegal copying of 
> >cinema. Is it possible to watermark traditional cinema screening ?
> >
> >The real problem is: When the movie is being screened in cinema, few 
> >ppl just walkin with a digital v. camera and shot the whole movie. 
> >The immediate next day you can see the pirated VCD's are available in 
> >the market. Is some one know of any watermarking technology that can 
> >protect the film ?
> >
> >regards
>
># J. A. Bloom and C. Polyzois, "Watermarking to Track Motion Picture 
>Theft", Proceedings of the Thirty-Eighth Asilomar Conference on 
>Signals, Systems, and Computers, Pacific Grove CA, 2004.
>
># J. A. Bloom, "Security and Rights Management in Digital Cinema", 
>Proceedings of IEEE International Conference on Multimedia and Expo, 
>ICME'03, Baltimore, July 2003.
>
># J. Lubin, J. A. Bloom, and H. Cheng, "Robust, Content-Dependent, 
>High-Fidelity Watermark for Tracking in Digital Cinema", Security and 
>Watermarking of Multimedia Contents V, Ping Wah Wong, Edward J. Delp, 
>Editors, Proceedings of SPIE Vol. 5020, 2003.
>
># J. A. Bloom and M. L. Miller, "Informed Detection Revisited," 
>Proceedings of the 2004 International Workshop on Digital Watermarking, Seoul Korea, 2004.
>
>Plus a bunch of recent press, e.g.,
>http://story.news.yahoo.com/news?tmpl=story2&u=/ap/20041203/ap_en_bu/an
>ti_piracy_technology
>
>=============================
>Dr. Jeffrey A Bloom, Sarnoff Corporation, 201 Washington Road, CN 5300, 
>Princeton, NJ 08543-5300 jbloom@sarnoff.com, 
>http://www.geocities.com/Jeffrey_Bloom, (609) 734-3287,
>(609) 734-2662 fax
>

=============================
Dr. Jeffrey A Bloom, Sarnoff Corporation, 201 Washington Road, CN 5300, Princeton, NJ 08543-5300 jbloom@sarnoff.com,
http://www.geocities.com/Jeffrey_Bloom, (609) 734-3287,
(609) 734-2662 fax





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