Research and Design of a Streaming Media DRM System and Video/Audio Encryption/Decryption Module

With the emergence and rapid development of IPTV,its commercial application has been restricted by the unlawful copy and spread.In the case that the real-time transmission of new emerging video/audio standard H.264/AAC code stream,the Digital Rights Management(DRM) technology in streaming media systems is researched,then a specific DRM system and its operating mechanism are introduced.The design of encryption and decryption modules are described on emphasis,finally a detailed AES-CTR encryption and decryption scheme used in H.264 code stream is represented,which is proved effective to protect the digital rights and real-time transmission of the H.264 code stream.