What is it about?
Video is the most prevalent traffic type on the Internet today. Significant research has been done on measuring user’s Quality of Experience (QoE) through different metrics. We take the position that energy use must be incorporated into quality metrics for digital video. We present our novel, energy- aware QoE metric for video, the Energy-Video Index (EnVI).
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Why is it important?
We take the position that ‘greenness’ – energy usage – should be used as a quality metric for video. It is important that the energy usage of video is better understood as its use increases. We demonstrate an empirical approach, and present measurements of energy usage and QoE of video playback (decoding). We also discuss the Energy Video-Index (EnVI) of quality, our objective metric which takes energy into consideration for the comparison of video quality.
Perspectives
We observed that 4K-UHD video consumes over 30% more energy, and up to 6 times more data than full HD (1080p), for a marginal increase in objective quality. We also discussed our energy metric for video. We showed how this metric can be combined with existing QoE metrics for video to produce a combined score – the EnVI – which considers both the QoE and the energy usage of video. This could be employed by a variety of stakeholders for energy-aware usage and adaptation of video streams.
Prof Saleem N Bhatti
University of St Andrews
Read the Original
This page is a summary of: Go Green with EnVI: the Energy-Video Index, December 2015, Institute of Electrical & Electronics Engineers (IEEE),
DOI: 10.1109/ism.2015.50.
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