Patent ID: 7565530

Claim:
A source device comprising: a Digital Rights Management (DRM) module which decrypts encrypted multimedia contents included in DRM contents through certification of a source device, and generates a control message for controlling digital audio/video (A/V) channels connected between the source device and a sink device based on a DRM rule; an input controller which certifies A/V data input from a media decrypter, based on the control message and vendor information received from the sink device, and outputs A/V data filtered according to a certifying result; an input interface which converts the A/V data output by the input controller into pixel data and audio data; and a signal transmitter which encrypts the pixel data and the audio data, converting the pixel and audio data which are encrypted into high-speed serial digital A/V signals, and transmits the A/V signals to the sink device through the digital A/V channels.