Szkaliczki, Tibor and Wagner, Balázs and Fazekas, László and Simonics, István (2009) Device independent content management and multimedia delivery. In: New technology platforms for learning - revisited. LOGOS open conference on strengthening the integration of ICT research effort. Proceedings. Budapest, 2009..

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Abstract

There is a high increase in the amount of multimedia content that can be accessed through wired and wireless channels. There is an increasing need for receiving the same content not only on PCs but on PDAs or mobile phones as well. In order to achieve Universal Multimedia Access (UMA), content adaptation is necessary to meet the terminal capabilities, network characteristics and user requirements. The digital item adaptation (DIA) standard belongs to one of the core specifications of the MPEG-21 framework. An interesting question related to content adaptation is to elaborate device-independent methods for storing and transmitting the multimedia content. In our case, we consider not only audio or video but also textual data with a screen layout as well which the typical case at eLearning materials is. The stored content should be easily accessed from several kinds of devices (desktop PC, mobile devices). The aim is to create an adaptive descriptive format, which is able to describe in which formats the appropriately compressed content data can be delivered to the devices. For this reason, already existing related formats are examined. The existing metadata sets describing the capabilities of devices are also studied. Our metadata descriptions are based on MPEG-7 and MPEG-21 standards. The results can be built up into multimedia servers and repositories. We have developed a system realising the adaptation concept. The main building blocks of the Adaptive Multimedia Delivery Systems are Content Management Core storing the multimedia resources, metadata and device descriptions, Adaptive Multimedia Delivery Control handling with the user requests and including Adaptation Decision Taking Engines and the third main component consists of Adaptation Engines transcoding the video, audio and image resources and transforming the page layout. In our presentation, we give a brief demo with the implemented system. Our further plan is to use it in eLearning systems to deliver multimedia contents. The adaptive content delivery provides the technical basis for ubiquitous learning.

Item Type:	Conference or Workshop Item (Paper)
Uncontrolled Keywords:	multimedia, adaptation, universal multimedia access (UMA)
Subjects:	Q Science > QA Mathematics and Computer Science > QA75 Electronic computers. Computer science / számítástechnika, számítógéptudomány
Divisions:	ELearning Department
Depositing User:	Eszter Nagy
Date Deposited:	11 Dec 2012 16:05
Last Modified:	11 Dec 2012 16:05
URI:	https://eprints.sztaki.hu/id/eprint/5965

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