An Open Source Content Decryption Module to Improve DRM Integration with HTML5 Platforms

MPEG-DASH in combination with CENC (Common Encryption), builds a solid foundation for interoperable media streaming on the Web. With W3C HTML5 premium media extensions MSE (Media Source Extensions) and EME (Encrypted Media Extension), being available in all major browsers today, a wide range of supported platforms exists already. A Content Decryption Module (CDM) is required for a functional EME implementation. We introduce an open source implementation of a CDM and explain the architecture behind this solution. It is designed to work with multiple DRM systems in an open and standardized way. To improve interoperability for protected content across the whole playback chain, the CDMi specification adds another abstraction layer between CDM and DRM system. We show that an open source CDM also integrates with the CDMi approach to support hardware-based DRM platforms.