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Proceedings Paper

Experienced quality factors: qualitative evaluation approach to audiovisual quality
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Paper Abstract

Subjective evaluation is used to identify impairment factors of multimedia quality. The final quality is often formulated via quantitative experiments, but this approach has its constraints, as subject's quality interpretations, experiences and quality evaluation criteria are disregarded. To identify these quality evaluation factors, this study examined qualitatively the criteria participants used to evaluate audiovisual video quality. A semi-structured interview was conducted with 60 participants after a subjective audiovisual quality evaluation experiment. The assessment compared several, relatively low audio-video bitrate ratios with five different television contents on mobile device. In the analysis, methodological triangulation (grounded theory, Bayesian networks and correspondence analysis) was applied to approach the qualitative quality. The results showed that the most important evaluation criteria were the factors of visual quality, contents, factors of audio quality, usefulness - followability and audiovisual interaction. Several relations between the quality factors and the similarities between the contents were identified. As a research methodological recommendation, the focus on content and usage related factors need to be further examined to improve the quality evaluation experiments.

Paper Details

Date Published: 26 February 2007
PDF: 12 pages
Proc. SPIE 6507, Multimedia on Mobile Devices 2007, 65070M (26 February 2007); doi: 10.1117/12.699797
Show Author Affiliations
Satu Jumisko-Pyykkö, Tampere Univ. of Technology (Finland)
Jukka Häkkinen, Univ. of Helsinki (Finland)
Göte Nyman, Univ. of Helsinki (Finland)

Published in SPIE Proceedings Vol. 6507:
Multimedia on Mobile Devices 2007
Reiner Creutzburg; Jarmo H. Takala; Jianfei Cai, Editor(s)

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