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A Survey of multimedia videoconferencing system and a proposal for a novel hybrid cloud and P2P architecture

Imen Debbabi, Wafa Kammoun, Ridha Bouallegue
2011 INTERNATIONAL JOURNAL OF COMPUTERS & TECHNOLOGY  
In this paper, we describe a variety of proposed videoconferencing solutions and classify them according to characteristics such as network architectures and video coding technologies and we propose a  ...  In this paper, we focus on videoconferencing systems, which represents the most complex type of video communication.  ...  In this system, an optimal set of tree structures is determined for routing multi-rate content using scalable video coding.  ... 
doi:10.24297/ijct.v10i5.4148 fatcat:exv33vlilrhjlpwz2v5tll3w5q

Face location in wavelet-based video compression for high perceptual quality videoconferencing

Jiebo Luo, Chang Wen Chen, K.J. Parker
1996 IEEE transactions on circuits and systems for video technology (Print)  
Abstruct-We present a human face location technique based on contour extraction within the framework of a wavelet-based video compression scheme for videoconferencing applications.  ...  videoconferencing since the human face is often the most important portion within a frame and should be coded with high fidelity.  ...  It has been applied to a wavelet-based image and video compression scheme designed primarily for videoconferencing.  ... 
doi:10.1109/76.510934 fatcat:aj4jlly6pff6fgniofaybql2li

Videoconferencing over packet-based networks

M.H. Willebeek-LeMair, Zon-Yin Shae
1997 IEEE Journal on Selected Areas in Communications  
Index Terms- Distributed MCU, packet video, rate control, videoconferencing, video mixing. I.  ...  Solutions for the circuit-switched and packet-based networks differ considerably.  ...  Finally, JPEG is best suited for very high-end videoconferencing applications due to its robustness and good video quality.  ... 
doi:10.1109/49.611162 fatcat:ml7ypz2infhirnaolcr3ckozni

Internet-Based Videoconferencing Coder/Decoders and Tools for Telemedicine

Wei-Li Liu, Kai Zhang, Craig Locatis, Michael Ackerman
2011 Telemedicine journal and e-health  
Alternative videoconferencing technologies for providing telemedicine via the Internet are described.  ...  Specific methods for encoding and decoding video are discussed and video applications that have been tested at the National Library of Medicine are reviewed.  ...  Its principle components are the videoconferencing tool (VIC) 17 for video and the Robust Audio Tool 18 for audio.  ... 
doi:10.1089/tmj.2010.0193 pmid:21563926 pmcid:PMC3135256 fatcat:7uaf6f2x4vc37cmiu3ybmonhc4

Influence of packets losses on video quality in case of using multiple description coding with time division into two and three substreams

Alexey Tarakanov, Olga Gushchina, Ilya Nenakhov
2015 2015 17th Conference of Open Innovations Association (FRUCT)  
The paper presents analysis of simultaneous use of multiple description coding (MDC) algorithm and multipath routing for IP-based videoconferencing system.  ...  Experimental results are given for time division of video stream in two and three substreams, compressed by H.264 codec with different quality factors (Q) and different packet loss rates in network (from  ...  ACKNOWLEDGMENT The work is supported by project No. 1060 as part of government task for scientific research in P.G. Demidov Yaroslavl State University.  ... 
doi:10.1109/fruct.2015.7117998 dblp:conf/fruct/TarakanovGN15 fatcat:jl6eev6uozcvxay7ji2qdteqau

Multimedia Networking

Guobin (Jacky) Shen, Jianfei Cai
2007 Advances in Multimedia  
Multimedia contents (animation, audio, and video) are becoming increasingly popular on the Internet and are being accessed by a variety of networked devices through either wired or wireless links.  ...  A large number of distributed multimedia applications have been created, including Internet telephony, Internet videoconferencing, on-demand streaming or broadcasting, IPTV, distance learning, entertainment  ...  It presents a new scheme that integrates multiple-description coding (MDC), error-resilient video coding, and unequal error protection with a hybrid space-time coding structure for robust video transmission  ... 
doi:10.1155/2007/97262 fatcat:qusxlutasvg4pdseamrvhaeq7a

Enabling Composition-Based Video-Conferencing for the Home

Jack Jansen, Pablo Cesar, Dick C. A. Bulterman, Tim Stevens, Ian Kegel, Jochen Issing
2011 IEEE transactions on multimedia  
This paper describes a videoconferencing system that meets performance constraints and functional requirements for use in consumer homes.  ...  The results validate our architectural decisions and provide a valuable input for further research in domestic videoconferencing.  ...  Figure 7 : 7 Composition-Based video-conferencing in action.  ... 
doi:10.1109/tmm.2011.2159369 fatcat:odgsezqv2nhkhmokmhr6ouwmae

Performance Evaluation of Sign-Language Videoconference Traffic

Athanasios Drigas, Stelios Kouremenos, Dimitris Kouremenos
2006 2006 Innovations in Information Technology  
This paper presents modeling results for sign language videoconference traces (H.261 and H.263 encoded) which were captured from realistic multipoint IP videoconference sessions between Greek signers.  ...  traffic models against simulations, it is proven that the application of the proposed theoretical parameters into a generic continuous Markovian model can lead to a conservative, though accurate, solution for  ...  Our generalization of the C-DAR(1) model is proven to be a robust solution for theoretical studies on videoconferencing for deaf people.  ... 
doi:10.1109/innovations.2006.301978 fatcat:6abb3htpqzhwxidk43qt2pk6pm

Exploring Nurse and Patient Experiences of Developing Rapport During Oncology Ambulatory Care Videoconferencing Visits: Protocol for Qualitative Study (Preprint)

Paula Koppel, Jennie C De Gagne
2021 JMIR Research Protocols  
of interventions and evidence-based practice guidelines for relationship building during videoconferencing telehealth visits.  ...  A research team trained in qualitative methodology will use conventional content analysis to analyze the data using first- and second-level codes derived directly from the transcribed text data.  ...  There are many first-level coding methods, but based on this study's aim to capture the interpersonal experiences of nurses and patients who participate in videoconferencing visits, the coding method will  ... 
doi:10.2196/27940 pmid:34125073 fatcat:kkh3eoipvzeh3kgssbfotq3c5y

IP Video Conferencing: A Tutorial [article]

Roman Sorokin, Jean-Louis Rougier
2017 arXiv   pre-print
Video conferencing is a well-established area of communications, which have been studied for decades.  ...  This paper presents the main techniques behind the modern IP-based videoconferencing services, with a particular focus on codecs, network protocols, architectures and standardization efforts.  ...  Before the wide adoption of SIP, it was the main protocol for videoconferencing, so many existing videoconferencing installations are still based on H.323.  ... 
arXiv:1711.03418v1 fatcat:mpgkldewqrbmblytackylsjegi

Peer-to-peer multipoint videoconferencing on the Internet

M. Reha Civanlar, Öznur Özkasap, Tahir Çelebi
2005 Signal processing. Image communication  
A peer-to-peer architecture for multipoint videoconferencing is presented. Each conference participant may have asymmetric and dissimilar bandwidth connections to the Internet.  ...  A protocol for a completely distributed implementation has been developed and tested on a prototype system extending a point-to-point video phone to a multipoint one.  ...  In addition, CoopNet uses a multiple description coding method for the media content, which improves robustness and balances load among peers.  ... 
doi:10.1016/j.image.2005.05.003 fatcat:zzcxvnex7besnpgxejejyoaffu

Development Of Campus Video-Conference System Based On Peer-To-Peer Architecture

Sanni Abubakar Omuya Ogirima
2014 Zenodo  
This paper describes the design and implementation of campus video conference system based on P2P architecture that was tested within premises of Ladoke Akintola University of Technology, Ogbomoso, Nigeria  ...  The media stream engine is responsible for audio/video capture and playback, the conferencing control protocol defines a set of conventions governing the structure and behavior of communication messages  ...  In this system, an optimal set of tree structures is determined for routing multi-rate content using scalable video coding (Schwarz et al, 2009 ). This system divides peers into many groups.  ... 
doi:10.5281/zenodo.1000201 fatcat:memzmpoemngzfpu6f6hsbuh5ni

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  
Index Terms-Mobile video-based learning, H.264/MPEG-4 AVC software codec, mobile conferencing, peer-to-peer group communication, distributed SIP conference management. I.  ...  This approach allows for a spontaneous, location independent establishment of video dialogs, which is of particular importance in interactive learning scenarios.  ...  Thus video coded learning content can be provided for pull on demand on mobiles.  ... 
doi:10.3991/ijim.v3i3.773 fatcat:xvo2e7xn7jcs7h2wwfc4b2zorq

Effective desktop videoconferencing with minimal network demands

Dave Hearnshaw
2000 British Journal of Educational Technology  
The DVC tools comprised of Robust Audio Tool (RAT), VIC (video tool) and WB (shared whiteboard).  ...  Limitations in current methods for assessing video channel quality are discussed, and a new scheme for tutorial content quality analysis is outlined.  ... 
doi:10.1111/1467-8535.00153 fatcat:7aeh3eccxjcwhh2pyvrwos3fi4

Linear Combination Of Face Views For Low Bit Rate Face Video Compression

Ioannis Koufakis, Bernard Buxton
1998 Zenodo  
Such model-based image coding techniques have recently received a lot of attention for the encoding of face images for videoconferencing applications [2, 3] .  ...  However, sparse correspondence between the basis and novel face views is needed, so as in other knowledge-based coding approaches, a robust and fast scheme for detecting faces and control points, along  ... 
doi:10.5281/zenodo.36810 fatcat:7xwqrj4x2bcuborcawhgpztm2u
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