MPEG

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MPEG

Moving Pictures Experts Group Informatics The standard compression ratio for data transmission and pixels for video files. See Pixel.
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In particular, the CC/PP and, thus, UAProf adopts an approach which is based on MIME media types [FB96] whereas MPEG-21 UED relies on classification schemes introduced within MPEG-7 [MSS02].
In this paper we have presented a model that allows one to map context delivery descriptions between different formats (e.g., OMA UAProf and MPEG-21 UED) that are based on different technologies (i.e., XML Schema and RDF/OWL).
Exploiting MPEG-21 brings several advantages to the learning object arena.
* MPEG-21 is an international standard, which will be used across a wide range of industries.
The goal of MPEG's latest initiative, MPEG-21 (ISO/IEC 18034-1) (Bormans & Hill, 2002), the Multimedia Framework, is to define the technology needed to support Users to exchange, access, consume, trade, and otherwise manipulate multimedia Digital Items in an efficient, transparent, and interoperable way.
At its most basic level, MPEG-21 provides a framework in which one User interacts with another User and the object of that interaction is a Digital Item commonly called content.
Among the standard initiatives, the most relevant is the MPEG-21 standard that defines a framework for dealing with different aspects of multimedia information management.
MPEG-21 DIA specifies description formats for permissions and conditions for multimedia conversions that are useful to determine which changes (adaptations) are permitted on content in view and under what kind of conditions.
--a policy to manage digital rights expressed by MPEG-21 Rights Expression Language (REL) [3] profiles that enables the governed sharing of digital items along with the protection of the intellectual property, a secure structured overlay network that assures the basic security functionalities providing an effective defense against well known attacks,
For metadata representation we adopted the MPEG-7 [1] and MPEG-21 [2] standards, which are outlined in Section 2.3.
(a) An OWL Upper Ontology that fully captures the MPEG-7 MDS (Multimedia Description Schemes) and the MPEG-21 DIA (Digital Item Adaptation) Architecture (ISO/IEC 2003b);
MPEG-21 Multimedia Framework, Part 7: Digital Item Adaptation (Final Committee Draft).