Patent Number: 9,432,709

Title: System and method to prevent manipulation of transmitted video data

Abstract: Example embodiments relate to a system to prevent manipulation of transmitted video data including an Integrated Receiver Decoder (IRD) receiving audio/video data and a display device. The IRD may include a device to transmit an HDMI compliant audio/video stream toward the display device. The system may further include a device to add an over-encryption layer to the HDMI/HDCP stream before reaching the display device and a device to remove the added encryption layer so as to recover the HDMI/HDCP stream, before processing the HDMI/HDCP stream by the display device.

Inventors: Kudelski; Andre (Lutry, CH), Nicolas; Christophe (St. Prex, CH)

Assignee: Nagravision S.A.

International Classification: H04N 7/173 (20110101); H04N 21/254 (20110101); H04N 21/4363 (20110101); H04N 21/4367 (20110101); H04N 21/835 (20110101); H04N 7/167 (20110101)

Expiration Date: 2020-08-30 0:00:00