Patent ID: 9432709
Filing Date: 2016-08-30
CPC Classification: H04N

Claim Text:
1. A system to prevent manipulation of transmitted video data, the system comprising: an Integrated Receiver Decoder (IRD) configured to receive audio/video data and to output the audio/video data within an HDMI/HDCP stream, the HDMI/HDCP stream being an HDMI compliant audio/video stream protected by an HDCP protocol layer; an encryption device configured to add an over-encryption layer to said HDMI/HDCP stream to obtain an over-encrypted stream, the over-encrypted stream being encrypted with the over-encryption layer and the HDCP protocol layer, the encryption device including a transmitter configured to transmit the over-encrypted stream, the encryption device being housed in a converter box that is external to the IRD; a decryption device configured to receive the over-encrypted stream and to remove the added over-encryption layer so as to recover said HDMI/HDCP stream; and a display device configured to receive and process the recovered HDMI/HDCP stream, wherein the converter box includes,