MobiSLIC: Content-aware energy saving for educational videos on mobile devices

Qiyam Tung, Maximiliano Korp, Chris Gniady, Alon Efrat, Kobus Barnard

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

We present a context-aware system that simultaneously increases energy-efficiency and readability for educational videos on smartphones with OLED displays. Our system analyzes the content of each frame of the video and intelligently modifies the colors and presentations of specific regions of the frame to drastically reduce display energy consumption while retaining relevant content of the lecture video. We achieve this by leveraging the mapping between frames and electronic versions of slides used in the lecture. This enables separate manipulation of the slide area and the background. Further, since the slides can themselves be analyzed for content (e.g. text and images within) this approach provides substantive control over energy use and user experience. We evaluate the system using extensive energy measurements performed on phones using two different display technologies. Our method was able to reduce energy usage up to 59.2 % of the energy used by the display which amounts to 27 % of the total energy used by the device.

Original languageEnglish (US)
Title of host publicationMobile and Ubiquitous Systems
Subtitle of host publicationComputing, Networking, and Services - 10th International Conference, MOBIQUITOUS 2013, Revised Selected Papers
EditorsIvan Stojmenovic, Zixue Cheng, Song Guo
PublisherSpringer-Verlag
Pages396-408
Number of pages13
ISBN (Electronic)9783319115689
DOIs
StatePublished - Jan 1 2014
Event10th International Conference on Mobile and Ubiquitous Systems: Computing, Networking and Services, MOBIQUITOUS 2013 - Tokyo, Japan
Duration: Dec 2 2013Dec 4 2013

Publication series

NameLecture Notes of the Institute for Computer Sciences, Social-Informatics and Telecommunications Engineering, LNICST
Volume131
ISSN (Print)1867-8211

Other

Other10th International Conference on Mobile and Ubiquitous Systems: Computing, Networking and Services, MOBIQUITOUS 2013
CountryJapan
CityTokyo
Period12/2/1312/4/13

Keywords

  • Energy-efficiency
  • Lecture videos
  • OLED
  • Smartphones

ASJC Scopus subject areas

  • Computer Networks and Communications

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  • Cite this

    Tung, Q., Korp, M., Gniady, C., Efrat, A., & Barnard, K. (2014). MobiSLIC: Content-aware energy saving for educational videos on mobile devices. In I. Stojmenovic, Z. Cheng, & S. Guo (Eds.), Mobile and Ubiquitous Systems: Computing, Networking, and Services - 10th International Conference, MOBIQUITOUS 2013, Revised Selected Papers (pp. 396-408). (Lecture Notes of the Institute for Computer Sciences, Social-Informatics and Telecommunications Engineering, LNICST; Vol. 131). Springer-Verlag. https://doi.org/10.1007/978-3-319-11569-6_31