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MPEG-21 : Goals and Achievements

MPEG-21 : Goals and Achievements. Ian Burnett, Rik Van de Walle, Keith Hill, Jan Bormans and Fernando Pereira IEEE Multimedia, October-November 2003. Outline. Introduction Digital Item (DI) MPEG-21 Spec. Digital Item Declaration (DID) Digital Item Identification (DII) REL and RDD

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MPEG-21 : Goals and Achievements

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  1. MPEG-21 : Goals and Achievements Ian Burnett, Rik Van de Walle, Keith Hill, Jan Bormans and Fernando Pereira IEEE Multimedia, October-November 2003

  2. Outline • Introduction • Digital Item (DI) • MPEG-21 Spec. • Digital Item Declaration (DID) • Digital Item Identification (DII) • REL and RDD • Digital Item Adaptation (DIA) • Conclusion

  3. MPEG-21 Introduction • Goal: ”multimedia framework” to enable transparent and augmented use of multimedia resources across various networks and devices • Technologies: To create, manage, transport, distribute, and consume Digital Items (DI) • Concepts: fundamental unit of distribution and transaction, DI, and Users interaction with DI.(MPEG-21 Overview, MPEG doc. N5231)

  4. Digital Item • A structured digital object with a standard representation, identification and description (metadata) • Fundamental unit of distribution and transaction in MPEG-21 multimedia framework • DI = (resource + metadata + structure) • Resource – individual asset or distributed content • Metadata – data description • Structure – relationship among parts of digital item, both resource and metadata

  5. Figure 1 : Example Digital Item

  6. MPEG-21 ”7 Elements”(1) • Digital Item Declaration • A uniform and flexible abstraction and interoperable schema for declaring Digital Items • Digital Item Identification and Description • A framework for identification and description of any entity regardless of its nature, type or granularity • Content Handling and Usage • Provide interfaces and protocols that enable creation, manipulation, search, access, storage, delivery, and re(use) of content across the content distribution and consumption value chain

  7. MPEG-21 ”7 Elements”(2) • Intellectual Property Management and Protection • The means to enable content to be persistently and reliably managed and protected across a wide range of networks and devices • Terminals and Networks • The ability to provide interoperable and transparent access to content across network and terminal • Content Representation • How the media resources are represented • Event Reporting • The metrics and interfaces that enable Users to understand precisely the performance of all reportable events within the framework

  8. MPGE-21 Spec. • Part 1 – Vision, Technologies and Strategy • Part 2 – Digital Item Declaration (DID) • Part 3 – Digital Item Identification (DII) • Part 4 – Intellectual Property Management and Protection (IPMP) • Part 5 – Rights Expression Language (REL) • Part 6 – Rights Data Dictionary (RDD) • Part 7 – Digital Item Adaptation (DIA) • Part 8 – Reference Software • Part 9 – File Format • Part10 – Digital Item Processing (DIP) • Part 11 Evaluation Tools for Persistent Association • Part 12 Test Bed for MPEG-21 Resource Delivery • Part 13 Scalable video coding • Part 14 Conformance

  9. MPGE-21 Spec.(Cont1.) • Vision, technologies, and strategy • describes the multimedia framework and its architectural elements • Digital Item Declaration (DID) • provides a uniform and flexible abstraction and interoperable schema for declaring Digital Items • Digital Item Identification (DII) • defines the framework for identifying any entity regardless of its nature, type, or granularity

  10. MPGE-21 Spec.(Cont2.) • Intellectual property management and protection (IPMP) • provides the means to reliably manage and protect content across networks and devices • Rights Expression Language (REL) • specifies a machine-readable language that can declare rights and permissions using the terms as defined in the Rights Data Dictionary • Rights Data Dictionary (RDD) • specifies a dictionary of key terms required to describe users’ rights

  11. MPGE-21 Spec.(Cont3.) • Digital Item Adaptation (DIA) • defines description tools for usage environment and content format features that might influence the transparent access to the multimedia content • Reference software • includes software that implements the tools specified in the MPEG-21 Spec. • File format • defines a file format for storing and distributing Digital Items.

  12. MPGE-21 Spec.(Cont4.) • Digital Item Processing (DIP) • defines mechanisms for standardized and interoperable processing of the information in Digital Item. • Test bed for MPEG-21 resource delivery • provides a software-based test bed for delivering scalable media and testing/evaluating this scalable media delivery in streaming environments

  13. Digital Item Declaration • DID model : (XML-based) • Container – logical package • Item – grouping sub-items and/or components bounded to relevant descriptions • Component – binding of a resource to descriptors • Examples: CD package with music + video + graphics

  14. Figure 3. Example Digital Item Declaration

  15. Digital Item Identification (DII) • Uniquely identify Digital Items • Identification : a tag (number, …), e.g.,ISBN • Syntax: Uniform Resource Identifier (URI) urn : mpeg:mpeg21:diid:sss:nnn • sss = name of the identification system • nnn = unique identifier within that identification system • Ex: ISAN:3943…=Int’s Standard Audiovisual Number:3934…

  16. REL and RDD • Rights Expression Language (REL) • A machine-readable language that can declare rights and permissions using the terms as defined in the Rights Data Dictionary • Rights Data Dictionary (RDD) • A set of clear, consistent, structured, integrated and uniquely identified Terms to support the MPEG-21 Rights Expression Language

  17. The REL Data Model

  18. REL Data Model • 4 key components • Principal (user, compliance devices) • Rights (copy, play, download, view, print,…) • Resource (the digital content) • Condition (when, how, how much times,…) • Example • Registered user 8043 can have 10 downloads from compliant device 132 starting from time xxx to time yyy

  19. Digital Item Adaptation (DIA) • Goal : achieve interoperable transparent access to (distributed) advanced multimedia content by shielding Users from network and terminal installation, management and implementation issues • Usage Environment Description Tools • User characteristics, Terminal characteristics, etc. • Resource Adaptability Tools • Binary Media Resource Adaptability, etc. • System-Related Tools • Session Mobility, etc.

  20. Digital Item Adaptation architecture

  21. Delivery in Heterogeneous Environments

  22. Conclusion • MPEG-21 is an open standard-based multimedia framework for multimedia delivery and consumption. • MPEG-21 aims to enable the use of multimedia resources across a wide range of networks and devices.

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