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Proceedings Paper

Predicting subjective video quality from separated spatial and temporal assessment
Author(s): Ricardo R. Pastrana-Vidal; Jean C. Gicquel; Jean L. Blin; Hocine Cherifi
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Paper Abstract

During real time video communications over packet networks, various degradations can occur on spatial or temporal signal axes. The end-user may perceive loss of image clearness-sharpness and fluidity impairments on visual information. The overall perceived degradation may indeed be seen as a combined contribution of both perceptual axes. A significant perceptual interaction between spatial and temporal quality has been highlighted by a set of subjective quality assessment tests. We show that, at least in our experimental conditions, the overall visual quality can be estimated from independent spatial (clearness-sharpness) and temporal (fluidity) quality assessments. Four visual quality prediction models are presented. The models' predictions show significant correlation with mean opinion scores from a group of observers. The model showing the highest performance takes into account non linear human assessment characteristics. Our results lead to a better understanding of spatiotemporal interactions and they could be useful for the conception of automatic video quality metrics.

Paper Details

Date Published: 9 February 2006
PDF: 11 pages
Proc. SPIE 6057, Human Vision and Electronic Imaging XI, 60570S (9 February 2006); doi: 10.1117/12.642952
Show Author Affiliations
Ricardo R. Pastrana-Vidal, France Telecom (France)
Jean C. Gicquel, France Telecom (France)
Jean L. Blin, France Telecom (France)
Hocine Cherifi, LIRSIA, Univ. de Bourgogne (France)

Published in SPIE Proceedings Vol. 6057:
Human Vision and Electronic Imaging XI
Bernice E. Rogowitz; Thrasyvoulos N. Pappas; Scott J. Daly, Editor(s)

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