Enhancing the quality of service of mobile video technology by increasing multimodal synergy
van der Sluis, F.
van den Broek, E.L.
van Drunen, A.
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.
Field of view (FOV)
To reference this document use:
Quality of service (QoS)
Signal-to-noise ratio (SNR)
Voice over IP (VoIP)
Mobile telecommunication systems
Signal to noise ratio
Voice/data communication systems
Field of views
Taylor and Francis Ltd.
Behaviour and Information Technology, 37 (9), 874-883