Copy protection for digital motion picture image data

Details Copy protection for digital motion picture image data Copy protection for digital motion picture image data

2006-05-09

2006-05-09

Revale, Christopher (Department: 2131)

Cryptography

Video cryptography

Video electric signal modification

C380S218000, C380S044000, C380S044000, C380S044000, C380S202000, C380S252000, C380S201000, C380S205000, C380S221000, C380S238000, C382S100000, C382S284000, C382S248000, C382S232000, C352S040000, C713S176000

Reexamination Certificate

active

07043019

ABSTRACT:
An apparatus and method for displaying a copy-deterrent pattern (104) within a digital motion picture in order to discourage recording of the motion picture using a video camera or other sampling recording device. A copy-deterrent pattern (104) could be, for example, one or more symbols, a random pattern, a digital watermark or a text message (106). The copy-deterrent pattern (104) comprises a plurality of pixels within each frame of the digital motion picture, and the displayed pixel intensities are modulated at a temporal frequency using modulation characteristics deliberately selected to be imperceptible to human observers while simultaneously producing objectionable aliasing in any copy made using a video camera.

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