Davvi

Johansen, Dag; Aarflot, Tjalve; Hurley, Joe; Kvalnes, Åge; Gurrin, Cathal; Zav, Sorin; Olstad, Bjørn Harald; Aaberg, Erik; Endestad, Tore; Riiser, Haakon; Griwidz, Carsten; Halvorsen, Pål

doi:10.1145/1631272.1631482

Cited by 33 publications

(3 citation statements)

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“…Second-Spectrum for instance employs machine learning and computer vision to visually augment sport games, with appealing visuals and statistics live on television. Besides that, SecondSpectrum offers users an exhaustively labelled database of events, plays and games which can easily be searched; see also the work of Johansen et al (2009) on this. While radio and television offer limited interactivity, novel interactive concepts are being developed to engage spectators with the sports.…”

Section: Audience Entertainmentmentioning

confidence: 99%

A Design Space of Sports Interaction Technology

Postma¹,

Delden²,

Koekoek³

et al. 2022

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With this monograph we introduce a new, systematic taxonomy of Sports Interaction Technology (Sports ITech) that defines a design space of existing and future work in this domain. We set the taxonomy in a context of our view on sport science and sports practice, target outcomes of sports and the underlying factors influencing them, and the role that sports technology plays to support sports science and practice. In that setting we systematically build and illustrate a taxonomy for the design space for Sports ITech as a sub-area of sports technologies, with specific attention for the adequate inclusion of knowledge from the sports

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Section: Audience Entertainmentmentioning

confidence: 99%

A Design Space of Sports Interaction Technology

Postma¹,

Delden²,

Koekoek³

et al. 2022

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“…The field of SportsHCI not only aims to perfect performance; the unbridled potential of interaction technology for sports comes to light when also considering the many other application domains that it caters to, for example: entertainment [13,15,33,62], refereeing [3,4,10]; safety [1,2]; training [22,27,31,32,39,40,51,59] and research [11,59,64]. And this is just painting the picture in broad strokes.…”

Section: Introductionmentioning

confidence: 99%

Coaxing: An Empirical Exploration of a Novel Way to Nudge Athletic Performance in Sports

Postma

Brinke

Delden

et al. 2022

Persuasive Technology

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This paper presents design work and empirical work, exploring a novel way of steering player behaviour and performance in sports, called 'coaxing'. We propose that athletic performance might be influenced by tricking players into thinking that their athletic abilities are different from what they really are. We approach this proposition from three different angles. First, we use related work to theoretically ground the concept of coaxing in literature. Second, we take a research-throughdesign approach to illustrate the potential of coaxing for sports practice, specifically volleyball. Third, we carried out an experimental study to shed light on the effectiveness of coaxing, also in the context of volleyball. For the experimental study, we explored the idea of coaxing by means of an augmented ball-catching task. For every participant, we quantified their ability to intercept fly balls and presented them with visualisations that either overstated or understated this ability; in the expectation that this would impact how they acted in the ball-catching task. While the effects of coaxing failed to reach significance, data suggest that coaxing might yet be a viable form of steering player behaviour. Contrary to our hypothesis, participants whose abilities had been understated mostly outperformed their counterparts. We discuss the particularities of the current findings and their implications for sports practice. We conclude with practical and theoretical recommendations to further develop the concept of coaxing.

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“…here we discuss other adaptive streaming approaches that also use HTTP to retrieve data. For example, DAAVI (JOHANSEN et al, 2009) has the same core functionality than DASH by making different bit rate segments on the server, providing MPD for the client, being client logic-based and transferring data over HTTP. However, the MPD structure of DAAVI is different from DASH's MPD.…”

Section: Other Adaptive Streaming Approachesmentioning

confidence: 99%

Capa

Afzal

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Bandwidth constraint is a real challenge for achieving and sustaining high quality mobile video streaming services. Diverse multipath transmission techniques are being investigated as possible solutions, since recent developments have enabled mobile devices users to receive video data simultaneously over multiple interfaces (e.g., LTE and WiFi). While some multipath protocols have been recently standardized for this purpose (e.g., MPTCP, SCTP), being network layer protocols they cannot properly handle challenging transmission scenarios subject to packet losses and congestion, such as lossy wireless channels. It is important to note that, usually, users just want to have easy access to high quality video content without being necessarily aware of the multipath delivery channels.In this thesis, we adopt the MPEG Media Transport (MMT) protocol to propose an improvement for multipath wireless video streaming solutions. MMT is an application layer protocol with inherent hybrid media delivery properties. We propose a novel Content-Aware and Path-Aware (CAPA) scheduling strategy for MMT, using full cooperation between network metrics and video content features. Our strategy aims to select the best channel for transmitting each video packet and provides better models to adaptively cope with unstable communication channel conditions and to improve the final user quality of experience (QoE).For the experimental evaluation, we used ns-3 DCE to simulate different realistic multipath network scenarios, which include channel error models and background traffic. We evaluate CAPA performance over heterogeneous wireless networks under congested network and wireless lossy network conditions, which are common network situations with big adverse effect on video quality. Our approach yields significant video quality improvement in both scenarios compared to Path-Aware strategy (PA) and a simple scheduling strategy for the traditional multipath MMT (ES). For congested network scenario, CAPA could increase PSNR, respectively, by up to 4.25 dB (12.97%), and 7.22 dB (20.58%) compared to PA and ES. It could also improve SSIM, respectively, by up to 0.033 (3.78%), and 0.102 (12.54%) compared to PA and ES. For wireless lossy network scenario, CAPA could increase PSNR, respectively, by up to 6.84 dB (20.30%), and 9.43 dB (30.32%) compared to PA and ES. Our proposed strategy could also reach improvement of SSIM, respectively, by up to 0.100 (12.72%), and 0.113 (14.23%) compared to PA and ES.We also evaluate videos with different bit rates in our environment under congested network condition to check the behaviour of our proposed strategy, and how it handles streaming of videos with different bit rates to provide sufficient perceived video quality. Furthermore, we have a basic validation of fairness for CAPA to confirm fair access to the available resources in all paths.

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Davvi

Cited by 33 publications

References 0 publications

A Design Space of Sports Interaction Technology

A Design Space of Sports Interaction Technology

Coaxing: An Empirical Exploration of a Novel Way to Nudge Athletic Performance in Sports

Capa

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