Automatic orchestration of video streams to enhance group communication

Falelakis, Manolis; Groen, Martin; Frantzis, Michael; Kaiser, Rene; Ursu, Marian F.

doi:10.1145/2390876.2390886

Cited by 9 publications

(6 citation statements)

References 11 publications

(11 reference statements)

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“…Interviews are followed by questionnaires (20), video recordings (16), surveys (7), system logging/log files (7), observation (5), literature review (3), field notes (3), diaries/journals (3), group discussion/focus groups (2), performance (2), reflections (1), gaze recordings (1) and a rich case study data (1) consisting of six different cases and scenarios of challenges of distributed teams. While questionnaires and/or surveys were used in a large number of papers to gather data, in sum, only three papers are based on fully quantitative findings [32,49,128].…”

Section: Study Types and Data Collectionmentioning

confidence: 99%

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What was Hybrid? A Systematic Review of Hybrid Collaboration and Meetings Research

Neumayr¹,

Saatçi²,

Rintel³

et al. 2021

Preprint

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Interest in hybrid collaboration and meetings (HCM), where several co-located participants engage in coordinated work with remote participants, is gaining unprecedented momentum after the rapid shift in working from home due to the COVID-19 pandemic. However, while the interest is new, researchers have been exploring HCM phenomena for decades, albeit dispersed across diverse research traditions, using different terms, definitions, and frameworks. In this article, we present a systematic literature review of the contexts and tools of HCM in the ACM Digital Library. We obtained approximately 1,200 results, which were narrowed down to 62 key articles. We report on the terms, citations, venues, authors, domains, study types, and data of these publications and present a taxonomic overview based on their reported hybrid settings' actual characteristics. We discuss why the SLR resulted in a relatively small number of publications, and then as a corollary, discuss how some excluded high-profile publications flesh out the SLR findings to provide important additional concepts. The SLR itself covers the ACM until November 2019, so our discussion also includes relevant 2020 and 2021 publications. The end result is a baseline that researchers and designers can use in shaping the post-COVID-19 future of HCM systems.

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Section: Study Types and Data Collectionmentioning

confidence: 99%

“…6.3.1 SLR. Papers related to hybrid ecosystems and included in our SLR can be found here: [4], [129], [82], [130], [60], [131], [80], [132], [163], [208], [195], [84], [58], [49]. For their findings, see Table 7 where the Focal Point (FP) column tag is "Heco".…”

Section: Hybrid Ecosystemsmentioning

confidence: 99%

What was Hybrid? A Systematic Review of Hybrid Collaboration and Meetings Research

Neumayr¹,

Saatçi²,

Rintel³

et al. 2021

Preprint

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“…In [16,17], the authors explored user preferences for single and dual layouts for desktop video conferencing. To provide effective video conversation and task performance, orchestration could be used as a selection process of displayed information on each screen [18,19].…”

Section: Figure 1: Different Video Conferencing Architectures: (A) Fumentioning

confidence: 99%

The impact of bandwidth limitations and video resolution size on QoE for WebRTC-based mobile multi-party video conferencing

Vucic¹,

Skorin‐Kapov²,

Sužnjević³

2016

5th ISCA/DEGA Workshop on Perceptual Quality of Systems (PQS 2016)

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Multi-party video conferencing is a highly delay-sensitive and resource-intensive service. A key challenge faced by service providers is meeting end user Quality of Experience (QoE) requirements given bandwidth limitations, especially in mobile networks. Service adaptation mechanisms may thus be employed to adapt the audiovisual quality so as to meet current network conditions and resource availability. In this paper we report on a subjective user study involving threeparty audiovisual conversations established via mobile devices and aimed to investigate the impact of different video resolutions on QoE. We also investigate how different bandwidth limitations impact QoE for different video resolutions. The calls were established using a Web-based Real-Time Communication (WebRTC) application running on the Licode Multipoint Control Unit.

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“…used in Google+ Hangouts) where one participant is displayed larger in focus and the others with small previews only. The focus+context approach requires the system to take decisions on when to put which participant into focus, often referred to as orchestration [11]. For tele-immersive video-conferencing different setups were investigated which tried to replicate the face-to-face setup as well as possible (e.g.…”

Section: Related Workmentioning

confidence: 99%

A QoE study of different stream and layout configurations in video conferencing under limited network conditions

Gunkel

Schmitt

César

2015

2015 Seventh International Workshop on Quality of Multimedia Experience (QoMEX)

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Abstract-One particular problem of QoE research in video conferencing is, that most research in the past concentrated on one-to-one video conferencing or simply video consumption. However, video conferencing with two people (one-to-one) and within a group (multi-party) is different. Particularly, limitations of one participant might have an effect on the QoE of the whole group. This possible effect however is not well studied. Therefore, this paper aims to better understand the impact of individual limitations towards the groups QoE. To do so, we show a study about different video stream configurations and layouts for multi-party conferencing in respect to individual network limitations. For this, we conduct a user study with 20 participants in 5 groups, in a semi-controlled setup. Such a setup, combines supervising participants locally while still using our software infrastructure deployed in the internet. Furthermore, we use an asymmetric experiment design, by putting every participant under a different condition, as this proposes a more realistic scenario. Within our study, we look at three different factors: layout, video quality and network limitations. To foster conversation between participants, the group engaged in a discussion about different survival questions. Our findings show that packet loss and the resulting distortions have a greater impact on the QoE as reducing the video quality by its resolution. Furthermore, our findings indicate that participants are more satisfied in a visually equal layout (showing participants in a similar size) and a more balanced stream configuration.

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Automatic orchestration of video streams to enhance group communication

Cited by 9 publications

References 11 publications

What was Hybrid? A Systematic Review of Hybrid Collaboration and Meetings Research

What was Hybrid? A Systematic Review of Hybrid Collaboration and Meetings Research

The impact of bandwidth limitations and video resolution size on QoE for WebRTC-based mobile multi-party video conferencing

A QoE study of different stream and layout configurations in video conferencing under limited network conditions

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