Cryptography – Video cryptography – Video electric signal modification
Reexamination Certificate
2008-01-15
2008-01-15
Moazzami, Nasser (Department: 2136)
Cryptography
Video cryptography
Video electric signal modification
C380S216000, C380S222000, C726S026000, C726S030000, C382S282000
Reexamination Certificate
active
10205866
ABSTRACT:
An image altering apparatus which provides confidential viewing of a video display by means of time multiplexing the fundamental display image with a color-inverted image thereof on a pixel-by-pixel basis. Electronic circuitry and/or software are utilized to modify the fundamental image signal by time multiplexing its color data components with corresponding inverse color data components to generate a compound image signal which is representative of a substantially featureless image. Different multiplexing sequences of color data components and inverse color data components may be utilized at varying duty cycles to generate a compound image which is highly confidential and secure from unauthorized viewing. The fundamental image may be decoded and viewed only by those viewing the encoded image through specially designed eyeglasses incorporating time synchronized LCD shutters, variable polarizers, or color filters, which can selectively block inverted color components and/or demodulate the fundamental image to allow only the true fundamental color components to pass, thereby providing confidential and highly secure viewing of the fundamental image by the viewer.
REFERENCES:
patent: 4602285 (1986-07-01), Beaulier et al.
patent: 4879603 (1989-11-01), Berman
patent: 5028994 (1991-07-01), Miyakawa et al.
patent: 5406627 (1995-04-01), Thompson et al.
patent: 5481275 (1996-01-01), Mical et al.
patent: 5488496 (1996-01-01), Pine
patent: 5500686 (1996-03-01), Yamaguchi et al.
patent: 5537476 (1996-07-01), Coteus et al.
patent: 5614920 (1997-03-01), Coteus et al.
patent: 5619219 (1997-04-01), Coteus et al.
patent: 5629984 (1997-05-01), McManis
patent: 5680233 (1997-10-01), Faris et al.
patent: 5684561 (1997-11-01), Yancey
patent: 5706416 (1998-01-01), Mann et al.
patent: 5710839 (1998-01-01), Cok
patent: 5801697 (1998-09-01), Parikh et al.
patent: 5828793 (1998-10-01), Mann
patent: 5963371 (1999-10-01), Needham et al.
patent: 6016159 (2000-01-01), Faris
patent: 6198532 (2001-03-01), Cabib et al.
patent: 6236407 (2001-05-01), Leban et al.
patent: 6292092 (2001-09-01), Chow et al.
patent: 6317522 (2001-11-01), Rackett
patent: 6529209 (2003-03-01), Dunn et al.
patent: 6662128 (2003-12-01), Barbour et al.
patent: 2003/0038838 (2003-02-01), Pollitt
patent: 2003/0046537 (2003-03-01), Smith
patent: 64032332 (1989-02-01), None
patent: 05119754 (1993-05-01), None
StereoGraphics Corporation, ‘Monitor ZScreen owners manual’, 2001-2006, StereoGraphics Corporation, entire document, http://www.reald.com/scientific/manuals/mzs-man.pdf.
Ohtake and Aoki, A Study of Security for CRT Display with Liquid Crystal Shutter, The Transactions of the Institute of Electronics, Information and Communication Engineers, Apr. 25, 1990, pp. 453-455, vol. 373-D-I No. 4, Japan.
Rogers, For Your Eyes Only, Computer Graphics World, Dec. 1998, pp. 16-17, Pennwell Publish, U.S.
Baum Ronald
Moazzami Nasser
Schroeder & Siegfried P.A.
Waterstrike Incorporated
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