Method and system for transmitting alternative image content of a physical display to different viewers

A control interface for displaying at least first and second sets of image data on a physical display in a time-sliced multiplexed manner to different sub-sets of viewers, one sub-set of viewers comprising direct viewers watching image content on said physical display directly with human eyes and at least one other sub-set of viewers comprising broadcast viewers watching a video stream of a scene which includes said physical display, comprising means for receiving or generating a master clock signal, means for generating two or more time-shifted slave clock signals and means for generating trigger signals in correspondence with said two or more time-shifted slave clock signals, said control interface being configured to:

• generate at least two different sets of image data, namely a first set of image data comprising a sequence of first images to be perceived by said direct viewers, and at least a second set of image data comprising a sequence of second images to be perceived by said broadcast viewers and not to be perceived by said direct viewers, wherein, in order to reduce flickering of the perception of said first set of image data by said direct viewers, said at least second set of image data comprises a sequence of said second images and corresponding inverse images;
• display the images of said at least two sets of image data in a time-sliced multiplexed manner on said physical display, wherein in order to reduce flickering of the perception of said first set of image data by said direct viewers, said at least second set of image data comprises a sequence of said second images and corresponding inverse images.

A system for transmitting alternative image content of a physical display to different viewers, comprising:

• at least one physical display;
• a control interface for displaying at least first and second sets of image data on a physical display in a time-sliced multiplexed manner to different sub-sets of viewers, one sub-set of viewers comprising direct viewers watching image content on said physical display directly with human eyes and at least one other sub-set of viewers comprising broadcast viewers watching a video stream of a scene which includes said physical display, comprising
• means for receiving or generating a master clock signal,
• means for generating two or more time-shifted slave clock signals
• and means for generating trigger signals in correspondence with said two or more time-shifted slave clock signals,
• said control interface being configured to:
• generate at least two different sets of image data, namely a first set of image data comprising a sequence of first images to be perceived by said direct viewers, and at least a second set of image data comprising a sequence of second images to be perceived by said broadcast viewers and not to be perceived by said direct viewers, wherein, in order to reduce flickering of the perception of said first set of image data by said direct viewers, said at least second set of image data comprises a sequence of said second images and corresponding inverse images;
• display the images of said at least two sets of image data in a time-sliced multiplexed manner on said physical display, wherein in order to reduce flickering of the perception of said first set of image data by said direct viewers, said at least second set of image data comprises a sequence of said second images and corresponding inverse images;
• at least one camera for recoding a scene including said physical display in correspondence with at least one of said at least first and second sets of image data,
• means for generating at least one video stream from video data provided by said at least one camera;
• and
• means for transmitting said video stream to a sub-set of said viewers.

A method for transmitting alternative image content of a physical display to different sub-sets of viewers, one sub-set of viewers comprising direct viewers watching image content on said physical display directly with human eyes and at least one other sub-set of viewers comprising broadcast viewers watching a video stream of a scene which includes said physical display, said method comprising:

• generating at least two different sets of image data, namely a first set of image data comprising a sequence of first images to be perceived by said direct viewers, and at least a second set of image data comprising a sequence of second images to be perceived by said broadcast viewers and not to be perceived by said direct viewers, wherein, in order to reduce flickering of the perception of said first set of image data by said direct viewers, said at least second set of image data comprises a sequence of said second images and corresponding inverse images;
• displaying the images of said at least two sets of image data in a time-sliced multiplexed manner on said physical display, wherein in order to reduce flickering of the perception of said first set of image data by said direct viewers, said at least second set of image data comprises a sequence of said second images and corresponding inverse images, and wherein each image of said sequence of first images is displayed at least once at a higher intensity than said sequence of second images and at least once at the same intensity as said sequence of second images;
• generating at least two video streams of a scene which includes said physical display, said video streams consisting of video frames captured with a frame rate higher than 20 Hz synchronously with the displaying of the images of two of said at least two sets of image data on said physical display, wherein said video streams do not include inverse images, wherein a first video stream is generated from said images of said sequence of first images having the same intensity as said sequence of second images and a second video stream is generated from said images of said sequence of second images;
• and
• transmitting said video streams to said broadcast viewers.