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Multimedia Data Modelling: Moving Up the Ladder
Li, Q.
Multimedia data modelling is radically different from the
traditional data modelling due to the special requirements
imposed by multimedia data. One fundamental issue of
concern is the notorious 'semantic gap' between what
were stored in the database, and what the end-users
understand and expect. Due to the ambiguous, subjective,
and transient (AST) semantic problems of multimedia
data, necessary context information needs to be made
available and provided in order to conduct meaningful and
effective query processing of different paradigms and at
various levels of abstraction. Unfortunately, traditional and
conventional data models were not designed with such
objectives in mind.
More specifically, when people realized that relational
databases fall short in supporting advanced applications
including multimedia data management due to the limited
modelling power of the relational data model, researchers
went ahead with devising semantic, object-oriented (OO)
data models in the 80's (until early 90's). While the later
commercial development of database systems has led to
the so-called object-relational (OR) databases since late
90's, such a marriage of the two does not actually solve the
problems encountered by multimedia data management. In
particular, it does not solve the basic issue of bridging the
semantic gap by addressing the AST problems..
In this talk, we present a new approach to multimedia data
modelling by extending the traditional ANSI/SPARC
architecture, attempting to cater for the unique
requirements of multimedia data management. In addition
to the traditional three level schemas, an additional
semantic view mechanism called MediaView is added as a
new layer between the external schema and end-user
applications, moving up the ladder of semantic abstraction.
Various facilities of this MediaView are described and
discussed. Among other interesting capabilities,
MediaView supports two important properties termed as
context dependence and modality independence which are
important to meaningful and effective query processing
with different paradigms and at various levels of
abstraction.
A number of applications have been developed based on
this MediaView, and in this talk we shall describe some of
these including Web-based recipe data management and
cross-media retrieval. |
Cite as: Li, Q. (2008). Multimedia Data Modelling: Moving Up the Ladder. In Proc. Fifth Asia-Pacific Conference on Conceptual Modelling (APCCM 2008), Wollongong, NSW, Australia. CRPIT, 79. Hinze, A. and Kirchberg, M., Eds. ACS. 3. |
(from crpit.com)
(local if available)
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