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Evaluation of teleteaching services over ATM and IP networks

Ch Bouras, A Gkamas, V Kapoulas, Th Tsiatsos
2003 Telematics and informatics  
The main result of our experiments is that broadband networks offer many capabilities for high quality teleteaching, and generally speaking, high quality telematic services.  ...  This paper presents various teleteaching scenarios over an ATM network infrastructure with the use of native ATM and IP over ATM.  ...  Acknowledgements We want to thank the consortium of the ATMNet project for the collaboration we have during the project.  ... 
doi:10.1016/s0736-5853(01)00026-0 fatcat:qpgfaeyse5ep5h5f62dmmcgtxy

A Multicast Gateway for Dial-In Lines [chapter]

Christoph Kuhmünch
1999 Lecture Notes in Computer Science  
Unfortunately the cost for the hardware necessary to participate in multicast sessions over a high speed link are still prohibitively high.  ...  In our Interactive Home Learning project are providing methods to participate in a teleteaching lecture -transmitted on the MBone -live from a PC at home via a low-bandwidth connection (e.g. ISDN).  ...  This is especially useful in teleteaching scenarios because good audio quality in a lecture is much more important than high video quality.  ... 
doi:10.1007/3-540-48757-3_30 fatcat:znqlzbrt2vdvtb53tjhvp5xdtu

Multimedia multipoint teleteaching over the European ATM pilot [chapter]

Simon Znaty, Thomas Walter, Marcus Brunner, Jean-Pierre Hubaux, Bernhard Plattner
1996 Lecture Notes in Computer Science  
The BETEUS communication platform, i.e. the part of the BETEUS platform providing services for interconnecting distant locations, is built on top of the European ATM pilot network.  ...  Secondly, the communication platform can be extended so that IP multicast facilities [8] can be used for point-to-multipoint communication as is requested by teleteaching applications.  ...  Acknowledgement: We are grateful to all members of the BETEUS consortium for participating in the field trials: C. Blum, P. Dubois, B. Dufresne, M. Goud, C. Isnard, J. Kawalek, X. Logean, R.  ... 
doi:10.1007/bfb0022229 fatcat:wsgvgqbstjddjf7wjgmwlpcxiq

Potential and limitations of a teleteaching environment based on H.323 audio-visual communication systems

Pantelis Balaouras, Ioannis Stavrakakis, Lazaros Merakos
2000 Computer Networks  
In the absence of such specialised systems, technologies tailored to other services are being considered for teleteaching services as well.  ...  The eective support of teleteaching services requires the development of multimedia collaboration systems that are capable of providing real-time and high quality audio-visual communication among distributed  ...  Networked multimedia applications and systems are required to implement teleteaching scenarios.  ... 
doi:10.1016/s1389-1286(00)00164-x fatcat:maj2g4c6h5bftntr3d5c4bi2oe

User-Driven Design of a Flexible Distance Education Environment - Rationale, Lessons Learned and Future Implications

Magnus L�fstrand, Mathias Johanson
2008 Sixth International Conference on Creating, Connecting and Collaborating through Computing (C5 2008)  
Thereby, the need for support staff is greatly diminished.  ...  In addition, a strategy for future development of the environment, based on the results presented here and on previous research, is suggested.  ...  Acknowledgements The authors wish to thank the teachers involved in the automotive engineering distance education program at Luleå University of Technology for supplying valuable input to the requirements  ... 
doi:10.1109/c5.2008.6 dblp:conf/c5/LofstrandJ08 fatcat:gybhxrjs4rfuhk3tue4p2uihci

Design and Implementation of Satellite-Based Networks and Services for Ubiquitous Access to Healthcare [chapter]

Georgi Graschew, Theo A., Stefan Rakowsky, Peter M.
2010 Satellite Communications  
needed for collaborative work in a network of distributed medical intelligence (interactive Teleteaching).  ...  For asymmetric video bandwidth allocation (for example for e-learning applications) the maximum bandwidth settings for good operation are 768 kbps in one direction and 192 kbps in the other direction.  ...  Design and Implementation of Satellite-Based Networks and Services for Ubiquitous Access to Healthcare, Satellite Communications, Nazzareno Diodato (Ed.), ISBN: 978-953-307-135-0, InTech, Available from  ... 
doi:10.5772/9986 fatcat:rynfjkpuy5dtnhgkv2gkiyu4jq

A model for collaborative services in distributed learning environments [chapter]

Volker Hilt, Werner Geyer
1997 Lecture Notes in Computer Science  
Due to the realization of collaborative services as operations on the model, no specific network collaboration protocol is required.  ...  We present an optimistic synchronization scheme which provides consistency for the distributed model.  ...  In the Remote Lecture Room (RLR) scenario lecture rooms are connected via a high speed network and courses are exchanged synchronously and interactively between the universities of Heidelberg and Mannheim  ... 
doi:10.1007/bfb0000367 fatcat:vym73qvv75hz3nibv3x7cz6x7m

An optimized 11.264-based video conferencing software for mobile devices

H.L. Cycon, T.C. Schmidt, G. Hege, M. Wahlisch, M. Palkow
2008 2008 IEEE International Symposium on Consumer Electronics  
Mobile phones and related gadgets in networks are on the spot to deliver sufficient performance for rich multimedia applications and communication.  ...  At second we present an integrated peer-to-peer group communication solution, which scales well for medium-size conferences and accounts for the heterogeneous nature of mobile and stationary participants  ...  An application-sharing facility is included for collaboration and teleteaching.  ... 
doi:10.1109/isce.2008.4559439 fatcat:ycfc7psluffipb2hcpmqxxcwf4

Real-time Interactive Telemedicine for Ubiquitous Healthcare: Networks, Services and Scenarios [chapter]

Georgi Graschew, Theo A., Stefan Rakowsky, Peter M.
2011 Advances in Telemedicine: Technologies, Enabling Factors and Scenarios  
Scenarios www.intechopen.comReal-time Interactive Telemedicine for Ubiquitous Healthcare: Networks, Services and Scenarios www.intechopen.com  ...  Besides high quality live video transmission using moderate bandwidths (0.5-1 Mbit/ s) it also allows for still-image transmission.  ...  Real-time Interactive Telemedicine for Ubiquitous Healthcare: Networks, Services and Scenarios, Advances in Telemedicine: Technologies, Enabling Factors and Scenarios, Prof.  ... 
doi:10.5772/13881 fatcat:lq3mknksqnec7a24ykjvtx5ypm

Let's Meet at the Mobile - Learning Dialogs with a Video Conferencing Software for Mobile Devices

Thomas C. Schmidt, Hans L. Cycon, Gabriel Hege, Matthias Wählisch, Mark Palkow
2009 International Journal of Interactive Mobile Technologies  
Mobile phones and related gadgets in networks are omnipresent at our students, advertising itself as the platform for mobile, pervasive learning.  ...  This approach allows for a spontaneous, location independent establishment of video dialogs, which is of particular importance in interactive learning scenarios.  ...  An application-sharing facility is included for collaboration and teleteaching.  ... 
doi:10.3991/ijim.v3i3.773 fatcat:xvo2e7xn7jcs7h2wwfc4b2zorq

A secure, accountable, and collaborative whiteboard [chapter]

Werner Geyer, Rüdiger Weis
1998 Lecture Notes in Computer Science  
The development of the digital lecture board emerged from our experiences with synchronous, computer based distance education in the TeleTeaching projects of the University of Mannheim.  ...  For almost two y ears, we h a ve been using video conferencing tools for transmitting lectures and seminars.  ...  Stefan Lucks for helpful comments and interesting discussions.  ... 
doi:10.1007/bfb0055299 fatcat:ijozn4guzvgh5fv62zuzh7wmkq

Real-time teleteaching in medical physics

M Woo, KH Ng
2008 Biomedical Imaging and Intervention Journal  
A pilot project has been carried out for six years and reported previously.  ...  to high-quality education that will benefit the profession in the long term.  ...  network connection.  ... 
doi:10.2349/biij.4.1.e13 pmid:21614306 pmcid:PMC3097695 fatcat:bk4zehvxnvc6zighqrbiya7n54

Peer-to-peer videoconferencing with H.264 software codec for mobiles

Hans L. Cycon, Thomas C. Schmidt, Gabriel Hege, Matthias Waahlisch, Detlev Marpe, Mark Palkow
2008 2008 International Symposium on a World of Wireless, Mobile and Multimedia Networks  
A rapidly growing number of carriers offer wireless video services to their customers, taking advantage of high quality video codecs implemented in dedicated hardware of selected mobile devices.  ...  In the second part we present a barrier-resistant peer-to-peer group communication scheme, which scales well for medium-size conferences and accounts for the heterogeneous nature of mobile and stationary  ...  An application-sharing facility is included for collaboration and teleteaching.  ... 
doi:10.1109/wowmom.2008.4594916 dblp:conf/wowmom/CyconSHWMP08 fatcat:f7w546bwz5hzvkl7a4nzt4xlai

Unencapsulated Mobile Multicast Routing for Next Generation Video Networks [chapter]

Thomas C. Schmidt, Matthias Wählisch, Hans L. Cycon, Mark Palkow, Henrik Regensburg
2006 Lecture Notes in Computer Science  
It is built as a simple, ready-to-use scheme for distributed presenting, recording and streaming multimedia content over next generation unicast or multicast networks.  ...  First evaluations grounded on real-world Internet topologies indicate network performance superior to traditional distribution schemes.  ...  Results from the T-Mobile network using a Multimedia Network Card show varying bandwidth results for the upstream direction.  ... 
doi:10.1007/11758525_139 fatcat:e432nffz7rbpdkpojdfjavunca

Distributed QoS Management for a Multiparty Video Conferencing System [chapter]

Ines Beier, Hartmut Koenig
2000 IFIP Advances in Information and Communication Technology  
(eds.), Intelligence in Networks  ...  The basic idea of our approach consists in a decentralized calculation and assignment of the bandwidth quota for the speaker and listener whereby the receiving capacity of the most powerful participant  ...  Gcsva [3] has been designed for supporting CSCW applications and for teleteaching, especially for teleseminars. It is aimed at small closed discussions groups.  ... 
doi:10.1007/978-0-387-35581-8_26 fatcat:arqwo5fqz5gova3wgshp35q3qy
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