USE OF AMBIENCE LIGHT FOR COPY PROTECTION OF VIDEO CONTENT DISPLAYED ON A SCREEN

USE OF AMBIENCE LIGHT FOR COPY PROTECTION OF VIDEO CONTENT DISPLAYED ON A SCREEN

The invention provides a method for impeding making a useful copy with an optical recording device of video content displayed on a screen, wherein the method comprises displaying the video content on the screen, illuminating with ambience light of an ambience light source the screen, the ambience li...

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Hauptverfasser: VAN HERPEN, Maarten Marinus Johannes Wilhelmus, WILLEMSEN, Oscar Hendrikus, MAANDONKS, Arnoldus Johannes Lucas Maria
Format: Patent
Sprache:eng ; fre ; ger
Schlagworte:
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRIC HEATING
ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR
ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
ELECTRICITY
PICTORIAL COMMUNICATION, e.g. TELEVISION
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creator VAN HERPEN, Maarten Marinus Johannes Wilhelmus
WILLEMSEN, Oscar Hendrikus
MAANDONKS, Arnoldus Johannes Lucas Maria
description The invention provides a method for impeding making a useful copy with an optical recording device of video content displayed on a screen, wherein the method comprises displaying the video content on the screen, illuminating with ambience light of an ambience light source the screen, the ambience light comprises light having a wavelength in the visible part of the spectrum, wherein the ambience light is controlled as function of the video content, and wherein the ambience light is intensity modulated with an intensity modulation having an intensity modulation frequency selected from the range of 40 Hz to 500 Hz.
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subjects ELECTRIC COMMUNICATION TECHNIQUE
ELECTRIC HEATING
ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR
ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
ELECTRICITY
PICTORIAL COMMUNICATION, e.g. TELEVISION
title USE OF AMBIENCE LIGHT FOR COPY PROTECTION OF VIDEO CONTENT DISPLAYED ON A SCREEN
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