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Publication Detail
The Big Picture on Small Screens Delivering Acceptable Video Quality in Mobile TV
  • Publication Type:
    Journal article
  • Publication Sub Type:
    Article
  • Authors:
    Knoche H, Sasse MA
  • Publisher:
    ACM
  • Publication date:
    08/2009
  • Pagination:
    20:1, 20:27
  • Journal:
    ACM Transactions on Multimedia Computing, Communications, and Applications (TOMCCAP)
  • Volume:
    5
  • Issue:
    3
  • Print ISSN:
    1551-6857
  • Language:
    EN
  • Keywords:
    Human Factors, Experimentation, Measurement, Design, Mobile multimedia consumption, resolution, size, trade-off, SUBJECTIVE IMAGE QUALITY, VIEWING-DISTANCE, RESOLUTION, DISPLAY, WORK, SIZE
  • Addresses:
    Knoche, H
    UCL
    Dept Comp Sci
    London
    WC1E 6BT
    England
Abstract
Mobile TV viewers can change the viewing distance and (on some devices) scale the picture to their preferred viewing ratio, trading off size for angular resolution. We investigated optimal trade-offs between size and resolution through a series of studies. Participants selected their preferred size and rated the acceptability of the visual experience on a 200ppi device at a 4: 3 aspect ratio. They preferred viewing ratios similar to living room TV setups regardless of the much lower resolution: at a minimum 14 pixels per degree. While traveling on trains people required videos with a height larger than 35mm.
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