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Proceedings Paper

Sporadic frame dropping impact on quality perception
Author(s): Ricardo R. Pastrana-Vidal; Jean Charles Gicquel; Catherine Colomes; Hocine Cherifi
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Paper Abstract

Over the past few years there has been an increasing interest in real time video services over packet networks. When considering quality, it is essential to quantify user perception of the received sequence. Severe motion discontinuities are one of the most common degradations in video streaming. The end-user perceives a jerky motion when the discontinuities are uniformly distributed over time and an instantaneous fluidity break is perceived when the motion loss is isolated or irregularly distributed. Bit rate adaptation techniques, transmission errors in the packet networks or restitution strategy could be the origin of this perceived jerkiness. In this paper we present a psychovisual experiment performed to quantify the effect of sporadically dropped pictures on the overall perceived quality. First, the perceptual detection thresholds of generated temporal discontinuities were measured. Then, the quality function was estimated in relation to a single frame dropping for different durations. Finally, a set of tests was performed to quantify the effect of several impairments distributed over time. We have found that the detection thresholds are content, duration and motion dependent. The assessment results show how quality is impaired by a single burst of dropped frames in a 10 sec sequence. The effect of several bursts of discarded frames, irregularly distributed over the time is also discussed.

Paper Details

Date Published: 7 June 2004
PDF: 12 pages
Proc. SPIE 5292, Human Vision and Electronic Imaging IX, (7 June 2004); doi: 10.1117/12.525746
Show Author Affiliations
Ricardo R. Pastrana-Vidal, France Telecom R&D (France)
Univ. de Bourgogne (France)
Jean Charles Gicquel, France Telecom R&D (France)
Catherine Colomes, France Telecom R&D (France)
Hocine Cherifi, Univ. de Bourgogne (France)

Published in SPIE Proceedings Vol. 5292:
Human Vision and Electronic Imaging IX
Bernice E. Rogowitz; Thrasyvoulos N. Pappas, Editor(s)

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