| 摘要 |
The aim of the invention is to provide a solution to ensure that the content sent by the IRD is the content effectively displayed on the screen. It is then proposed a system to prevent manipulation of transmitted video data comprising an Integrated Receiver Decoder (IRD) receiving audio/video data, a display device (TV), said IRD comprising means to transmit an HDMI compliant audio/video stream toward the display device, characterized in that the display device comprises internal or external means to extract all or part of the actual displayed information, and means to send all or part of the actual displayed information to the IRD, said IRD comprising means to compare the received information with the one sent to the display device.
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