UCL logo

UCL Discovery

UCL home » Library Services » Electronic resources » UCL Discovery

The kindest cut: Enhancing the user experience of mobile tv through adequate zooming

Knoche, H; Papaleo, M; Sasse, MA; Vanelli-Coralli, A; (2007) The kindest cut: Enhancing the user experience of mobile tv through adequate zooming. In: Proceedings of the ACM International Multimedia Conference and Exhibition. (pp. 87 - 96). ACM Green open access

[img]
Preview
PDF
Sasse_knoche_MM07_ucl.pdf

Download (452kB)

Abstract

The growing market of Mobile TV requires automated adaptation of standard TV footage to small size displays. Especially extreme long shots (XLS) depicting distant objects can spoil the user experience, e.g. in soccer content. Automated zooming schemes can improve the visual experience if the resulting footage meets user expectations in terms of the visual detail and quality but does not omit valuable context information. Current zooming schemes are ignorant of beneficial zoom ranges for a given target size when applied to standard definition TV footage. In two experiments 84 participants were able to switch between original and zoom enhanced soccer footage at three sizes - from 320x240 (QVGA) down to 176x144 (QCIF). Eye tracking and subjective ratings showed that zoom factors between 1.14 and 1.33 were preferred for all sizes. Interviews revealed that a zoom factor of 1.6 was too high for QVGA content due to low perceived video quality, but beneficial for QCIF size. The optimal zoom depended on the target display size. We include a function to compute the optimal zoom for XLS depending on the target device size. It can be applied in automatic content adaptation schemes and should stimulate further research on the requirements of different shot types in video coding.

Type: Proceedings paper
Title: The kindest cut: Enhancing the user experience of mobile tv through adequate zooming
Event: 15th international conference on Multimedia
ISBN-13: 9781595937025
Open access status: An open access version is available from UCL Discovery
DOI: 10.1145/1291233.1291254
Publisher version: http://dx.doi.org/10.1145/1291233.1291254
Language: English
Additional information: "© ACM 2007. This is the author's version of the work. It is posted here for your personal use. Not for redistribution. The definitive Version of Record was published in Proceedings of the 15th international conference on Multimedia, http://dx.doi.org/10.1145/1291233.1291254."
UCL classification: UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Computer Science
URI: http://discovery.ucl.ac.uk/id/eprint/20254
Downloads since deposit
102Downloads
Download activity - last month
Download activity - last 12 months
Downloads by country - last 12 months

Archive Staff Only

View Item View Item