1. MPEG 21 – An Overview MUMT 611 Elliot Sinyor January 2005

2. Contents Background/Motivation Key Concepts MPEG 21 Overview Digital Item Declaration Digital Item Identification Intellectual Property Management and Protection Rights Expression Language and Rights Data Dictionary Digital Item Adaptation File Format

3. Background/Motivation Work began in June of 2000 by MPEG (aka ISO/IEC JTC1 SC29 WG11) From the ISO Standard Document: “The MPEG-21 vision can thus be summarized as follows: to define a multimedia framework to enable transparent and augmented use of multimedia resources across a wide range of networks and devices used by different communities.”

4. Key Concepts A way to encapsulate almost any type of digital content. Audio, video, text, software and any combination of them. Packages data, meta-data, and meta- meta-data. How is this data viewed on a specific device? Control the use of the data (DRM) ie. who can view it? What can they do with it?

5. Part 1 – Vision, Technologies and Strategy Refers to the document itself In other words: Define a 'vision' for a multimedia framework to enable transparent and augmented use of multimedia resources across a wide range of networks and devices to meet the needs of all users

6. Part 1 – Vision, Technologies and Strategy Achieve the integration of components and standards to facilitate harmonisation of 'technologies' for the creation, modification, management, transport, manipulation, distribution, and consumption of Digital

7. Part 1 – Vision, Technologies and Strategy Define a 'strategy' for achieving a multimedia framework by the development of specifications and standards based on well- defined functional requirements through collaboration with other bodies.

8. Part 2 – Digital Item Declaration At the heart of it all: the “Digital Item” Examples: Music album E-book Software including setup and configuration information Resources, Metadata, Structure DID defines abstractions related to the construction of the digital item.

9. Part 2 – Digital Item Declaration Non-exhaustive list of abstractions: Container Groups items and or containers Item Component Descriptor Statement Choice/Selection/Condition “to view this content, the condition is that you made a choice of a certain selection”

10. Part 2 – Digital Item Declaration Non-exhaustive list of abstractions: Container Descriptor Statement Item Component Statement Choice/Selection/Condition “to view this content, the condition is that you made a choice of a certain selection”

11. Part 2 – Digital Item Declaration

13. Part 3 – Digital Item Identification Unique, persistent ID for digital item Done by using a URI (compact string used to identify a resource) Link digital item (or part of it) to another description scheme, eg ISRC

14. Part 3 – Digital Item Identification

16. Part 4 – Intellectual Property Management and Protection Does not specify a particular DRM scheme Framework for retrieving and using IPMP tools from various locations

17. Part 5 – Rights Expression Language Machine-readable language to declare rights and permissions Four basic entities Principal Must be authenticated Right what can the principal do? eg view once, copy, alter etc. Resource Digital item, a service, information owned by a principal (eg name or email address) Condition eg “you must pay $2 to watch this movie once”

18. Part 5 – Rights Expression Language

19. Part 6 – Rights Data Dictionary Provides description for basic RLE terms Allows for extension Allows for mapping/transformation of metadata from other authorities/namespaces

20. Part 7 – Digital Item Adaptation Purpose: to shield users from network and terminal installation, management and implementation issues. Conceptually, consists of resource adaptation engine and descriptor adaptation engine

21. Part 7 – Digital Item Adaptation

22. Areas of Concern User Characteristics Preferences Terminal Capabilities Available codecs, hardware-related specs Network Characteristics Bandwidth, delay and error Natural Environment Characteristics Eg illumination, auditory noise-levels

23. Part 7 – Digital Item Adaptation Areas of Concern Resource Adaptability Session Mobility

24. Part 8 – Reference Software Most recent specification need Systems-related specifications in MPEG- 21 www.enikos.com – DI browser www.enikos.com Released Jan 21, 2005

25. Part 8 – Reference Software

26. Part 9 – File Format Can include still/dynamic data Will borrow from MP4 Work has begun

27. Bibliography