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[MMSEM-Vocabulary] XGR 'Multimedia Vocabularies on the Semantic Web' available

From: Erik Mannens <erik.mannens@ugent.be>
Date: Mon, 23 Apr 2007 17:08:50 +0200
To: "'Hausenblas, Michael'" <michael.hausenblas@joanneum.at>, <christian.timmerer@itec.uni-klu.ac.at>
Cc: <public-xg-mmsem@w3.org>
Message-ID: <006001c785b9$4c75c8e0$36d5c19d@elis.UGent.be>
Dear Michael, Christian,



hereby the MPEG-21 snippet that could replace the old one. Christian, can
you check if all your comments are taken care of?



Sincere greetings,

Erik Mannens


Project Manager

Ghent University - IBBT
Faculty of Engineering
Department of Electronics and Information Systems
Multimedia Lab
Gaston Crommenlaan 8 bus 201, B-9050 Ledeberg-Ghent, Belgium

t: +32 9 33 14993
f: +32 9 33 14896

m: +32 473 27 44 17

t sec: +32 9 33 14911
e:  <mailto:erik.mannens@ugent.be> erik.mannens@ugent.be

URL:  <http://multimedialab.elis.ugent.be/>


The MPEG-21 standard aims at defining a framework for multimedia delivery
and consumption which supports a variety of businesses engaged in the
trading of digital objects. MPEG-21 is quite different to its predecessors,
as it is not focused on the representation and coding of content like MPEG-1
to MPEG-7 do, but instead focusing on filling the gaps in the multimedia
delivery chain. MPEG-21 was developed with the vision in mind that it should
offer users transparent and interoperable consumption and delivery of rich
multimedia content. The MPEG-21 standard consists of a set of tools and
builds on its previous coding and metadata standards like MPEG-1, -2, -4 and
-7, i.e., it links them together to produce a protectable universal package
for collecting, relating, referencing and structuring multimedia content for
the consumption by users (the Digital Item). The vision of MPEG-21 is to
enable transparent and augmented use of multimedia resources (e.g. music
tracks, videos, text documents or physical objects) contained in digital
items across a wide range of networks and devices. 

The two central concepts of MPEG-21 are Digital Items, a fundamental unit of
distribution and transaction, and the concept of Users interacting with
Digital Items: A User is any entity that interacts in the MPEG-21
environment or makes use of a Digital Item, and a Digital Item is a
structured digital object with a standard representation, identification and
metadata within the MPEG-21 framework. This entity is also the fundamental
unit of distribution and transaction within this framework. 

The MPEG-21standard consists of 18 parts (part 13, formerly known as
Scalable Video Coding, has been specified as an amendment to MEPG-4 part 10;
consequently, part 13 is currently no longer in use): 

*	Digital Item Declaration (DID) - provides a schema consisting of a
set of abstract terms and concepts to define Digital Items. The DID Model
defines digital items, containers, fragments or complete resources,
assertions, statements and annotations on digital items. 
*	Digital Item Identification and Description (DII) - is concerned
with the ability to identify and refer to complete or partial Digital Items.

*	Intellectual Property Management and Protection (IPMP) - specifies
how to include IPMP information and protected parts of Digital Items in a
DIDL document. It declares a IPMP Digital Item Declaration Language, which
provides for a protected representation of the DID model. Secondly, it
declares IPMP Information schemas, which define structures for expressing
protection-related information. 
*	Rights Expression Language (REL) - provides a schema to declare
rights and permissions using the terms as defined in the Rights Data
*	Rights Data Dictionary (RDD) - comprises of a set of uniquely
identified terms that can be used to declare rights on items using the REL. 
*	Digital Item Adaptation (DIA) - primarily specifies metadata on
which the adaptation of content across devices and networks could be based.
Additionally it specifies the behavior and a framework for tools to assist
the adaptation of content. 
*	Reference Software: This part includes descriptions and
implementations of the normative parts of the standard (DID, DII, REL, RDD
and DIA). This part should ensure a fast adaptation and implementation of
compliant applications. 
*	File Format: This part specifies how the MPEG-21 file (container)
format where a digital item and its references content can be placed. The
file format is an extension of the ISO file format. 
*	Digital Item Processing (DIP) - DIP should improve the processing of
'static' Digital Items by providing tools that allow Users to add
functionality to a DID. One possible use of DIP is to provide a Digital Item
with a set of methods that can are visible to users and could be performed
on the DI. For this purpose the DIP part specifies so called Digital Item
Methods (DIM) that can be expressed using the Digital Item Method Language
*	Vision, Technology and Strategy: This parts includes an overview of
the standard 
*	Evaluation Methods for Persistent Associations: This part deals with
how resources and metadata can be persistently linked and how especially
IPMP protection can be ensured on the content. 
*	Test Bed for MPEG-21 Resource Delivery: This part consists of a
software framework including a streaming player, a media server and a
network emulator to test MPEG-21 tools. 
*	Conformance Testing 
*	Event Reporting 
*	Binary Format 
*	Fragment Identification for MPEG Media Types 
*	Digital Item Streaming 

MPEG-21 identifies and defines the mechanisms and elements needed to support
the multimedia delivery chain as described above, as well as the
relationships between and the operations supported by them. Within the parts
of MPEG-21, these elements are elaborated by defining the syntax and
semantics of their characteristics, such as interfaces to the elements. 



Received on Monday, 23 April 2007 15:09:22 UTC

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