Patent ID: 9571899
Date: 2017-02-14
CPC Classifications: H04N

Claim:
1. A method for watermarking digital media content, the method comprising: receiving the digital media content through a first interface by an application software, the digital media content being in a form of at least one encrypted sample, said digital media content being related to metadata assigned to each sample; instructing the application software to get said metadata and to transmit it to the secure environment; decrypting said first data within the secure environment by means of the transport key to retrieve at least the content key in an intelligible form; verifying the authenticity of said digitally signed first and second data; transmitting, in response to a successful verification of the authentication of said digitally signed first and second data, the watermarking metadata to a watermarking unit and transmitting the digital media content, the content key and the initialization vector to a descrambler for descrambling each sample by means of the sample key; transmitting each descrambled sample to the watermarking unit for digitally marking each descrambled sample by means of at least said watermarking metadata; and transmitting the sample from the watermarking unit to the application software or to a secure media path for rendering purposes.