Time-varying Image Quality: Modeling the Relation between Instantaneous and Overall Quality

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Publisher: SMPTE — White Plains, NY, USA
Doc Type: Journal Article
Content Type: Original Research
Abbreviated Title: SMPTE J
Volume: 108, No. 11, pp. 802–811
Abstract: Experiments are described that evaluated a model linking instantaneously perceived quality to overall quality judgments of long video sequences. Subjects evaluated a 3-min MPEG-2 coded video sequence by means of a continuous assessment procedure. Additionally, they rated overall quality of segments of 10, 30, 60, and 180 sec of the same video material. The model describing the relation between the instantaneous and overall quality ratings contains two main ingredients, viz. an exponentially decaying weighting function, simulating the experimentally established recall advantage for the most recently presented material (called the recency effect), and a non-linear averaging procedure stressing the relative importance of strong impairments. The fit of the model to the experimental data resulted in a decay time constant of 26 sec and a power of 3 for the nonlinear weighting. These findings suggest that subjects rely predominantly on the worst events of a sequence when determining their overall quality judgment.
Publication Date: 1999-11-01
DOI: 10.5594/J04337
ISSN: Print: 0036-1682
Link: https://doi.org/10.5594/J04337
Author(s): Roelof HambergOce-Technologies B.V., Vento, The Netherlands.
Huib de RidderDelft University of Technology, Delft, The Netherlands. Coauthor
Copyright: © 1999 Society of Motion Picture and Television Engineers, Inc.

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Roelof Hamberg and Huib de Ridder; Time-varying Image Quality: Modeling the Relation between Instantaneous and Overall Quality, SMPTE Journal ( Volume: 108, Issue: 11, November 1999); SMPTE, 1999. Available at https://doi.org/10.5594/J04337

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Roelof Hamberg and Huib de Ridder; Time-varying Image Quality: Modeling the Relation between Instantaneous and Overall Quality, SMPTE Journal ( Volume: 108, Issue: 11, November 1999); SMPTE, 1999. Available at https://doi.org/10.5594/J04337

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<span class="citation">Roelof Hamberg and Huib de Ridder; <cite>Time-varying Image Quality: Modeling the Relation between Instantaneous and Overall Quality</cite>, SMPTE Journal ( Volume: 108, Issue: 11, November 1999); SMPTE, 1999. Available at <a href="https://doi.org/10.5594/J04337" target="_blank" rel="noopener">https://doi.org/10.5594/J04337</a></span>

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Roelof Hamberg and Huib de Ridder; <cite id="bib-10-5594-j04337">Time-varying Image Quality: Modeling the Relation between Instantaneous and Overall Quality</cite>, SMPTE Journal ( Volume: 108, Issue: 11, November 1999); SMPTE, 1999
<span class="doi">10.5594/J04337</span>
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