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Saving bitrate vs. pleasing users : where is the break-even point in mobile video quality?

Song, Wei, Tjondronegoro, Dian W., & Docherty, Michael (2011) Saving bitrate vs. pleasing users : where is the break-even point in mobile video quality? In ACM Multimedia 2011, 28 November - 1 December 2011, Hyatt Regency Scottsdale Resort and Spa, Scottsdale, Arizona.

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Abstract

This paper presents a comprehensive study to find the most efficient bitrate requirement to deliver mobile video that optimizes bandwidth, while at the same time maintains good user viewing experience. In the study, forty participants were asked to choose the lowest quality video that would still provide for a comfortable and long-term viewing experience, knowing that higher video quality is more expensive and bandwidth intensive. This paper proposes the lowest pleasing bitrates and corresponding encoding parameters for five different content types: cartoon, movie, music, news and sports. It also explores how the lowest pleasing quality is influenced by content type, image resolution, bitrate, and user gender, prior viewing experience, and preference. In addition, it analyzes the trajectory of users’ progression while selecting the lowest pleasing quality. The findings reveal that the lowest bitrate requirement for a pleasing viewing experience is much higher than that of the lowest acceptable quality. Users’ criteria for the lowest pleasing video quality are related to the video’s content features, as well as its usage purpose and the user’s personal preferences. These findings can provide video providers guidance on what quality they should offer to please mobile users.

Impact and interest:

6 citations in Scopus
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ID Code: 47156
Item Type: Conference Paper
Keywords: Acceptability, mobile video, quality, bitrate, encoding parameters, user profile, content type
Subjects: Australian and New Zealand Standard Research Classification > INFORMATION AND COMPUTING SCIENCES (080000) > OTHER INFORMATION AND COMPUTING SCIENCES (089900)
Divisions: Past > QUT Faculties & Divisions > Faculty of Science and Technology
Past > Schools > Information Systems
Copyright Owner: Copyright 2011 ACM
Copyright Statement: Permission to make digital or hard copies of all or part of this work for personal or classroom use is granted without fee provided that copies are not made or distributed for profit or commercial advantage and that copies bear this notice and the full citation on the first page. To copy otherwise, or republish, to post on servers or to redistribute to lists, requires prior specific permission and/or a fee.
Deposited On: 23 Nov 2011 00:42
Last Modified: 31 Oct 2014 05:17

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