User-Interest Driven Video Adaptation for Collaborative Workspace Applications

Scholl, Jeremiah; Elf, Stefan; Parnes, Peter

doi:10.1007/978-3-540-39405-1_1

Cited by 5 publications

(6 citation statements)

References 11 publications

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“…More sophisticated bandwidth schemes have also been explored that seek to fine tune the amount of bandwidth each sender uses, instead of just turning video-streams on or off [2, 4,24]. This has been shown to be effective for providing floor control to elearning participants over a limited bandwidth connection (modem) by allocating them an extra frame when they raise their hand to speak [4].…”

Section: Maximizing Video Qualitymentioning

confidence: 99%

“…This has been shown to be effective for providing floor control to elearning participants over a limited bandwidth connection (modem) by allocating them an extra frame when they raise their hand to speak [4]. Others have investigated technical details of how to implement more general unequal bandwidth sharing schemes, which could improve video quality in a variety of situations and at a wide variety of bandwidth levels [2,24]. However, no user studies have been conducted to demonstrate their effectiveness.…”

Section: Maximizing Video Qualitymentioning

confidence: 99%

See 1 more Smart Citation

Designing a large-scale video chat application

Scholl

Parnes

McCarthy

et al. 2005

Proceedings of the 13th Annual ACM International Conference on Multimedia

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Studies of video conferencing systems generally focus on scenarios where users communicate using an audio channel. However, text chat serves users in a wide variety of contexts, and is commonly included in multimedia conferencing systems as a complement to the audio channel. This paper introduces a prototype application which integrates video and text communication, and describes a formative evaluation of the prototype with 53 users in a social setting. We focus the evaluation on bandwidth and view navigation requirements in order to determine how to better serve users with video chat, and discuss how the findings from this evaluation can inform the design of future video chat applications. Bandwidth requirements are evaluated through user perceptions of video delivered using three different bandwidth schemes. For view navigation, we examine a system that automatically switches the video focus to the current "chatter", instead of requiring users to navigate manually to find the video steam they are interested in viewing.

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Section: Maximizing Video Qualitymentioning

confidence: 99%

Section: Maximizing Video Qualitymentioning

confidence: 99%

Designing a large-scale video chat application

Scholl

Parnes

McCarthy

et al. 2005

Proceedings of the 13th Annual ACM International Conference on Multimedia

Self Cite

View full text Add to dashboard Cite

show abstract

“…Another technique consists of reducing the quality of a network stream by its sender, based on the receiver's interest in that stream [3]. While this reduces the network load of congested links, receivers with uncongested links needlessly receive lower quality streams.…”

Section: Introduction and Related Workmentioning

confidence: 99%

Client-Controlled QoS Management in Networked Virtual Environments

Monsieurs

Wijnants

Lamotte

2005

Networking - ICN 2005

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Abstract. In this paper, we propose an architecture to regulate the bandwidth usage of multimedia streams in networked virtual environments. In this architecture, intelligent proxies are placed in the network. These proxies can transcode incoming streams to lower quality versions of those streams, thereby decreasing network traffic. A network intelligence layer at the receiver controls these transcoders based on the bandwidth the streams consume, and the importance that the receiving application assigns to each stream. To access this latter information, the network intelligence layer provides an interface between the QoS management of the network and the application's interest manager. This interest manager assigns a relative importance to each individual network stream. As a result, the network intelligence layer separates application logic from network QoS management, thereby maximizing its reusability. These concepts were implemented in an existing networked virtual environment framework, and experiments were performed to validate the ideas. The experiments demonstrate that bandwidth allocation can be changed dynamically, based on user interest, thereby maximizing network throughput and quality of experience.

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“…The demand may vary due to a wide variety of factors unique to every application. For example, the demand for the video stream of a particular user may vary during a video conference depending on communication patters such as who is the current speaker [7].…”

Section: Related Workmentioning

confidence: 99%