Experiences with High Definition Interactive Video Conferencing

Gharai, Ladan; Lehman, Tom; Saurin, Alvaro; Perkins, Colin

doi:10.1109/icme.2006.262565

Cited by 20 publications

(21 citation statements)

References 6 publications

(7 reference statements)

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“…To provide the desired level of interactivity and to limit end-to-end latencies of the user communication, while avoiding substantial quality loss, these environments often build upon streams of high-bandwidth media with low compression ratios [19,50,55] that are transmitted between the components of the environment. Bitrates of such media streams are often comparable even to capacities of current highestspeed network links.…”

Section: Introductionmentioning

confidence: 99%

Data transfer planning with tree placement for collaborative environments

2011

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Latency-sensitive data distribution and media streaming is a part of many network-centric applications. Based on our previous practical experiences with interactive high-quality media distribution and orchestration of network-centric collaborative environments, we have developed an automated planner for media stream distribution in environments where bandwidth of streams is comparable to capacities of network links. We have successfully adopted methods of constraint programming to deal with this problem. We provide a new comprehensive description of the constraint model which builds upon basic algebraic description we have published earlier. To formulate the model, a tree placement problem is proposed and a new corresponding variant of the link-based model for traffic placement problem is applied. We prove correctness of the proposed constraint satisfaction problem to present validity of included constraints with respect to the desired functionality of planning. An evaluation of the implemented solver is presented on a number of experimental problems to show effectiveness of the formulation. Importantly, the solver is a part of an application middleware called CoUniverse, which is pioneering orchestration of component-based interactive collaborative environments in 284 Constraints (2011) 16:283-316 a number of global demonstrations and projects. Both flexibility of the described model as well as generality of other parts of the CoUniverse framework allowed it to be one of very few early adopters of bandwidth-on-demand services for advanced high-bandwidth applications.

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Section: Introductionmentioning

confidence: 99%

Data transfer planning with tree placement for collaborative environments

2011

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“…Today's video streaming systems which support high quality digital video formats on broadband networks are used for a variety of purposes (Bak et al, 2006;Bodecek and Novotny, 2007;Gharai et al, 2006;Hutanu et al, 2007;Jo et al, 2007). Although existing video streaming systems have many useful functions for video distribution, it requires much bandwidth and computing power for the distribution.…”

Section: Introductionmentioning

confidence: 99%

A relay path selection method for video streaming on shared terminals

Kawano

Hashimoto

Shibata

2011

IJMIS

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Abstract:As broadband network services and video streaming systems become more common, high-definition (HD) quality stream format has become increasingly popular in live video distribution. Today's video streaming systems are used for a variety of purposes, but those systems require much bandwidth and CPU power for video streams. In this paper, we focus on the design of a relay path selection method on community-based resource sharing networks, which is able to select and use suitable stream paths cooperatively in sharing resources. On live video distribution, a candidate relay path list is created when users request to receive live video streams, and the best path is selected. If a new relay node is required, the suitable relay node is placed on a shared terminal in consideration of available resource status. Our experiments by a prototype system show that our method is successful in realisation of the suitable relay path selection and live video streaming on shared terminals.Keywords: live video distribution; cooperative video streaming system; community-based resource sharing networks; HD/SD quality video stream; relay path selection method.Reference to this paper should be made as follows: Kawano, Y., Hashimoto, K. and Shibata, Y. (2011) 'A relay path selection method for video streaming on shared terminals', Int.

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“…The goal of UltraGrid is to provide high-quality interactive video conferences along with general purpose HD distribution and visualization [10]. Though UltraGrid is capable of transporting either progressive (720p) or interlaced (1080i) HD video, it has originally focused on 720p format in real use.…”

Section: Software Architecturementioning

confidence: 99%

Uncompressed High Definition Visual Sharing System towards Interactive Networked Collaboration

Chae

Lee

et al. 2007

Proceedings of the ImmersCom

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Recent growth in available network bandwidth envisions widespread use of broadband applications such as uncompressed Internet HDTV, a cutting-edge application technology for networked collaboration. In this paper, we introduce a costeffective uncompressed HD visual sharing system and discuss its software architecture in depth. We also illustrate our experiences with the visual sharing system for interactive collaboration. Finally, experimental results will show how well it compensates for packet jitter to gear up media synchronization. KeywordsUncompressed high definition video, immersive media, interactive conferencing, tele-presence, and network-based collaboration.

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Experiences with High Definition Interactive Video Conferencing

Cited by 20 publications

References 6 publications

Data transfer planning with tree placement for collaborative environments

Data transfer planning with tree placement for collaborative environments

A relay path selection method for video streaming on shared terminals

Uncompressed High Definition Visual Sharing System towards Interactive Networked Collaboration

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