SYSTEM FOR PROVIDING PRIVATE VIEWING OF MULTIMEDIA CONTENTS OF A DISPLAY, AND METHOD THEREOF

摘要

The present invention relates to a system (1) for providing private viewing of multimedia contents, said system (1) comprising: - a display (2) comprising a plurality of pixels; - an image signal generator (3) which generates an original image signal representative of an original image to be displayed on said display (2), said original image signal comprising Red, Green and Blue colour data components; - signal modifying means (4) which mix, on a pixel-by-pixel basis, each original image signal transmitted from the image signal generator (3) with at least one corresponding modifying image signal component thereof, in order to generate a compound image signal representative of a compound image; - extracting means (5) for extracting said original image from said compound image displayed on the display (2). The invention is characterized in that said system (1) further comprises: - a memory (6) apt to receive and record an original frame sequence (N, N+l, N+2) corresponding to the original image signal generated by said image signal generator (3) at a first speed (FC) corresponding to a clock frequency; - a duplicating element (7) apt to read said memory (6) at a second speed (2FC) corresponding to a speed which is the double of said clock frequency (FC), said duplicating element (7) being apt to duplicate said original frame sequence (N, N+l, N+2) in order to send to said signal modifying means (4) a first [2N, 2(N+1), 2(N+2)] and a second type of frame sequence [2N 2(N'+1), 2(N'+2)].