Using Matroska EBML for right management

The Matroska container is a structured system to organize multimedia data in a single file, containing audio/video streams, content tagging and video subtitles. Matroska is a good target for digitize audio material because multimedia data could be tagged with a limited effort (simply by generating the container). A Matroska DRM-aware reader could be used to organize a search engine based on content search and to determine if user is entitled to access the resource. In this paper we propose to use ad-hoc DRM computation to grant users selective access to different sections of a single Matroska file. This approach permits to manage payment system, charging the user according to the multimedia information he actually displayed or played.