Authors:
João Benedito dos Santos Junior
1
;
Iran Calixto Abrão
1
;
Thelma Virgínia Rodrigues
1
and
Mario Guglielmo
2
Affiliations:
1
Pontifical Catholic University of Minas Gerais, Brazil
;
2
Multimedia Division, Telecom Italia Laboratory, Italy
Keyword(s):
New MPEG Standards; Interactive Video and Audio; Context-Awareness
Related
Ontology
Subjects/Areas/Topics:
Applications
;
e-Business
;
Education/Learning
;
e-Learning
;
Enterprise Information Systems
;
Functional and Non-Functional Requirements
;
Human-Computer Interaction
;
Knowledge Management and Information Sharing
;
Knowledge-Based Systems
;
Multimedia Systems
Abstract:
We are using MPEG-4 technology to build applications to be used in real environments. One of these applications allows for teacher to send real-time lessons to this/her students or to record them. The Tele-Learning System under development includes: a) on the teacher side: a recording workstation with two cameras, microphone, specific MPEG-4 software; b) an IP network or an MPEG-2 TS satellite link; c) on the student side: a PC with special MPEG software, and a special board if receiving from satellite. This research focuses on the broadcast scenario where a satellite board is used in a PC. Thus, the work covers how to send the lesson even to a student that is not connected to the intranet, using a satellite link, either over IP embedded in the MPEG-2 TS or directly over MPEG-2 TS. For the security part it may be necessary to have a low-band return channel implemented, for example, through a mobile phone. The satellite environment may require the redesign of the User Interface and th
e retargeting of the elementary streams parameters in order to match specific requirements and features of the medium. At this point, new interaction criteria have been established from distribution of MPEG-4 media objects and MPEG-7 scene descriptions on network environments. Furthermore, context-awareness aspects are being added for providing personalization on the teaching-learning environment and MPEG-21 is being studied for applying to new multimedia requirements.
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