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IRI-h, a Java-based distance education system: architecture and performance

R. Maly, H. Abdel-Wahab, C. Wild, C. M. Overstreet, A. Gupta, A. Abdel-Hamid, S. Ghanem, A. Gonzalez, X. Zhu
2001 Journal on Educational Resources in Computing  
We describe our motivation and vision for a reimplementation of IRI that supports synchronous and asynchronous distance education.  ...  This new version, called IRI-h (h for heterogeneous), is coded in Java and executes on several different platforms.  ...  tools at will to provide a synchronous virtual classroom environment (see Maly et al. [1997] for more complete descriptions of IRI's current capabilities and design).  ... 
doi:10.1145/376697.376703 fatcat:obd3slcaybfjpcw47oepm6tt24

On-demand regional television over the Internet

Haakon Bryhni, Hilde Lovett, Erling Maartmann-Moe, Dag Solvoll, Tryggve Sørensen
1996 Proceedings of the fourth ACM international conference on Multimedia - MULTIMEDIA '96  
The MPEG-1 video player developed in the project is described in some detail and the communication and audio/ video synchronization issues are discussed in particular.  ...  We present a regional news on demand television service over the Internet develo~d for the Norwegian Broadcasting Corporation (NRK), using a distributed video server and a WWW-integrated software-only  ...  project and assisted in the design of the MPEG player.  ... 
doi:10.1145/244130.244153 dblp:conf/mm/BryhniLMSS96 fatcat:zgzjgl7m3rfnzaey7zjvzhq4t4

Design considerations for a Multimedia Network Distribution Center [chapter]

Riccardo Gusella, Massimo Maresca
1992 Lecture Notes in Computer Science  
ABSTRACT In this paper we consider a distributed system in which a central facility, called a Multimedia Network Distribution Center, serves a number of clients and handles simultaneously different multimedia  ...  The papers presented in Session VI dealt with four very different multimedia projects which are summarized in chronological order.  ...  SYNCHRONIZATION Video frames and/or audio messages must be synchronized in order to be presented at the fight time.  ... 
doi:10.1007/3-540-55639-7_16 fatcat:rs76sp2h6varznbit3auupwzmy

Supporting Timing Requirements of Digital Video and Audio in Desktop Conferencing Systems [chapter]

D. D. Kandlur, M. H. Willebeek-LeMair, T. P. Barzilai, Z.-Y. Shae, J.-T. Liu
1995 High Performance Networking  
In order to provide an integrated collaboration environment which supports text, graphics, video, and audio, it is necessary to effectively support the timing requirements of digital video and audio.  ...  Digital video and audio are an integral part of a desktop collaboration system.  ...  They would also like to thank Amit Munta, Venkata Prabhala, and Mohamed Abdulnour for their contributions to the development of the MMT system.  ... 
doi:10.1007/978-0-387-34949-7_18 fatcat:angfujcl5zcfpbmfm4n7d3c7we

The design, implementation and evaluation of SMART

Jason Nieh, Monica S. Lam
1997 ACM SIGOPS Operating Systems Review  
Real-tune applications such as multimedia audio and video are increasingly populating the workstation desktop.  ...  To support the execution of these applications in conjunction with traditional non-realtime applications, we have created SMART, a Scheduler for Muhimedia And Real-'Hme applications.  ...  Duane Northcutt, and Brian Schmidt for their help with the applications and measurement tools used in our experiments. We also thank Jim, Duane, Amy Lim, Mcndel Rosenblum, Alice.  ... 
doi:10.1145/269005.266677 fatcat:yg7vyeoqlnbdfbegq4ws5rzioi

The design, implementation and evaluation of SMART

Jason Nieh, Monica S. Lam
1997 Proceedings of the sixteenth ACM symposium on Operating systems principles - SOSP '97  
Real-tune applications such as multimedia audio and video are increasingly populating the workstation desktop.  ...  To support the execution of these applications in conjunction with traditional non-realtime applications, we have created SMART, a Scheduler for Muhimedia And Real-'Hme applications.  ...  Duane Northcutt, and Brian Schmidt for their help with the applications and measurement tools used in our experiments. We also thank Jim, Duane, Amy Lim, Mcndel Rosenblum, Alice.  ... 
doi:10.1145/268998.266677 dblp:conf/sosp/NiehL97 fatcat:7uqgmlawffhn3fpdz3wj7ahzuq

A SMART scheduler for multimedia applications

Jason Nieh, Monica S. Lam
2003 ACM Transactions on Computer Systems  
Real-time applications such as multimedia audio and video are increasingly populating the workstation desktop.  ...  To support the execution of these applications in conjunction with traditional non-real-time applications, we have created SMART, a Scheduler for Multimedia And Real-Time applications.  ...  ACKNOWLEDGMENTS We thank Jim Hanko, Duane Northcutt, and Brian Schmidt for their help with the applications and measurement tools used in our experiments.  ... 
doi:10.1145/762483.762484 fatcat:ez33gklynze3lfjvdqgcsplbqm

Design and implementation of a multimedia CSCW platform

Ing-Chau Chang, Jau-Hsiung Huang, Wei-Hsin Tseng
1996 Multimedia tools and applications  
To provide the system with more features and user friendliness, multimedia processing and transmission capabilities for audio and video are incorporated into the platform.  ...  In this paper, a generic four-layer framework for computer supported cooperative work (CSCW) is proposed.  ...  Each workstation is equipped with a camcorder, a microphone, a speaker and a video compression/decompression board, which provides motion JPEG compression and decompression function for both image and  ... 
doi:10.1007/bf00672250 fatcat:goj273andvfnrh5mvumgtaokki

CMIFed

Lynda Hardman, Guido van Rossum, Jack Jansen, Sjoerd Mullender
1994 Proceedings of the second ACM international conference on Multimedia - MULTIMEDIA '94  
Acknowledgements The author would like to express his appreciation to Jim Kocher, Chen Lee, Ragunathan Rajkumar, and Jim Zelenka for their help in producing the accompanying video, and to the researchers  ...  ACKNOWLEDGMENTS The author wish to thank Jim Wilkinso*Ray of IBM communications for the video production and post-production and Curt Curtis for the narration.  ...  It supports approximately 400 UNIX workstations and Macintosh personal computers. The workstations share a common file system using a mix of NFS and AFS.  ... 
doi:10.1145/192593.197390 fatcat:dlhwm35sazhpfd6iu4qbv3oomq

Workstation-assisted education at MIT

George A. Champine
1992 Journal of Science Education and Technology  
Galatea is a pack- age for managing and controlling video resources in a distributed workstation environment such as ana- log video disk players and recorders, and analog video routing switches.  ...  The initial support of Athena was on timeshar- ing systems, but they were phased out in favor of a workstation environment based on Unix starting in late 1984.  ... 
doi:10.1007/bf00694834 fatcat:2zlxbuqqiverpbdhee566em26y

Technologies and methods in virtual campus for improving learning process

A. Kybartaite, J. Nousiainen, J. Malmivuo
2010 Computer Applications in Engineering Education  
This paper presents technologies and methods that have been used when developing a virtual campus for Biomedical Engineering.  ...  Modern educational technologies have been applied to produce video lectures for personal computers, iPods, media phones, and to integrate virtual communication system.  ...  Video lecture is a multimedia application with considerable promise for teaching and learning in higher education [9] .  ... 
doi:10.1002/cae.20460 fatcat:mdyyoqx62vehjb2yhwog4dxeju

Interoperable ITV systems based on MHEG

Helmut Cossmann, Carsten Griwodz, G. Grassel, M. Puhlhofer, M. Schreiber, Ralf Steinmetz, Hartmut Wittig, L. Wolf, Martin Freeman, Paul Jardetzky, Harrick M. Vin
1996 Multimedia Computing and Networking 1996  
example scenario for navigation in the GLASS system is provided.  ...  After a brief introduction to MHEG as the multimedia interchange format between application server and set-top box in interactive television systems, the GLASS clients and servers are described, and an  ...  The authors express their gratitude to Hans Werner Bitzer, Thorsten Illies, Stefan Koenig, Thomas Meyer-Boudnik, and Olaf Rehders for their discussions and contributions.  ... 
doi:10.1117/12.235895 fatcat:7gjt56wuavepxl7jllsmci2svu

A Survey of Learning Management Systems and Synchronous Distance Education Tools [article]

Khondkar Islam, Pouyan Ahmadi, Salman Yousaf
2017 arXiv   pre-print
the market today because it is open source and has a second mirrored whiteboard for simulteaching that is not available with any other system.  ...  To address these drawbacks, the objective of our study is to compare two LMSs and four synchronous distance education tools (SDET).  ...  Only features that meet course objectives and are relevant to a sound-learning environment for designing an effective course should be included in the LMS and SDET.  ... 
arXiv:1711.10585v1 fatcat:v65qxhxzu5fnxfz7i6qk4u6som

Improving continuous-media playback performance with in-kernel data paths

Fall, Pasquale
1994 Proceedings of IEEE International Conference on Multimedia Computing and Systems MMCS-94  
In an experiment designed to simulate remote video playback, we present measurements indicating that use of our techniques resulted in a 55% gain in throughput as compared with conventional systems. 100  ...  Our splice mechanism supports a peer-to-peer model of 1/0 where a requesting application can associate a data source with its corresponding data sink, allowing for system optimizations in the data path  ...  We now turn to the performance of the UNIX implementation described in Section 5. We constructed an experiment designed to simulate the video display environment of Figure 1 .  ... 
doi:10.1109/mmcs.1994.292440 dblp:conf/icmcs/FallP94 fatcat:rha2z6gefrdt5aedez3l6zq3je

Performance bottlenecks in digital movie systems [chapter]

Ralf Keller, Wolfgang Effelsberg, Bernd Lamparter
1994 Lecture Notes in Computer Science  
But the large amounts of data involved and the demand for isochronous transmission and playback are also great challenges for the designers of a new generation of le systems, database systems, operating  ...  systems, window systems, video encoder decoders and networks.  ...  Acknowledgement The authors would like to thank Rainer Buchwald, Christoph Wortig, and Oliver Kohnke who did a lot of programming and long test series to prove our assumptions.  ... 
doi:10.1007/3-540-58404-8_15 fatcat:277pclfxijcothhkli55swqcoi
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