Title
Enhancing the quality of service of mobile video technology by increasing multimodal synergy
Author
van der Sluis, F.
van den Broek, E.L.
van Drunen, A.
Beerends, J.G.
Publication year
2018
Abstract
Bandwidth is still a limiting factor for the Quality of Service (QoS) of mobile communication applications. In particular, for Voice over IP the QoS is not yet as good as for common, well-engineered, public-switched telephone networks. Multisensory communication has been identified as a possibility to moderate this limitation. One of the strengths of mobile video technology lies in its combination of visual and auditory modalities. However, one of the most salient features of mobile video applications is its small screen size. To test the potential of multimodal synergy for mobile devices, we assessed to what extent small screens affect multimodal synergy. This potential was assessed in an experiment with 54 participants, who conducted a standardised video-listening test for three talking-heads videos with a signal-to-noise ratio of –9 dB. The videos were presented on three different screen sizes, whilst keeping the video and auditory signals equal. Compared to a ground truth based on 359 participants, intelligibility was found to be significantly higher when using a large screen than when using a small screen. This indicates that mobile video technology has the potential for a significant multimodal synergy to which screen size is a substantial constraint. To optimally benefit from their multimodal potential, we offer suggestions on how to increase the effective screen size for small screen (e.g. mobile) devices and applications through elaborating the most relevant (visual) features. We conclude that knowledge about human sensory processing can alleviate the identified constraint and maximise the potential QoS of mobile video technology. © 2018, © 2018 Informa UK Limited, trading as Taylor & Francis Group.
Subject
Field of view (FOV)
Mobile
Multimodal
Multisensory
Quality of service (QoS)
Screen size
Signal-to-noise ratio (SNR)
Voice over IP (VoIP)
Internet protocols
Internet telephony
Mobile telecommunication systems
Screen printing
Signal to noise ratio
Voice/data communication systems
Field of views
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http://resolver.tudelft.nl/uuid:2ae186af-e5d0-4f74-8753-8144e6b20e47
TNO identifier
842674
Publisher
Taylor and Francis Ltd.
ISSN
0144-929X
Source
Behaviour and Information Technology, 37 (9), 874-883
Document type
article