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Adaptive Delay Aware Error Control for Internet Telephony

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Quality assessment of multidimensional video scalability

Touradj Ebrahimi, Francesca De Simone, Jong Seok Lee

Scalability is a powerful concept for adaptive video content delivery to many end users having heterogeneous and dynamic characteristics of networks and devices. In order to maximize users' quality of experience by selecting appropriate combinations of mul ...

Institute of Electrical and Electronics Engineers2012

Zeta: Scheduling Interactive Services with Partial Execution

James Richard Larus, Sameh Mohamed Elnikety, Chenyu Yan

This paper presents a scheduling model for a class of interactive services in which requests are time bounded and lower result quality can be traded for shorter execution time. These applications include web search engines, finance servers, and other inter ...

ACM2012

Subjective quality assessment of H.264/AVC video streaming with packet losses

Touradj Ebrahimi, Francesca De Simone, Frédéric Dufaux

Research in the field of video quality assessment relies on the availability of subjective scores, collected by means of experiments in which groups of people are asked to rate the quality of video sequences. The availability of subjective scores is fundam ...

Hindawi Publishing Corporation2011

Quality of Multimedia Experience: Past, Present and Future

Touradj Ebrahimi

This talk starts by defining what is Quality of Experience. It then provides an overview of state of the art in Quality of Experience in multimedia systems. It will finally conclude by presenting challenges and trends that need to be further addressed. ...

ACM2009

Mechanisms for Making Crowds Truthful

Boi Faltings, Radu Jurca

We consider schemes for obtaining truthful reports on a common but hidden signal from large groups of rational, self-interested agents. One example are online feedback mechanisms, where users provide observations about the quality of a product or service s ...

AI Access Foundation2009

Watermarked 3D Mesh Quality Assessment

Touradj Ebrahimi, Elisa Drelie Gelasca

This paper addresses the problem of assessing distortions produced by watermarking 3D meshes. In particular, a new methodology for subjective evaluation of the quality of 3D objects is proposed and implemented. Two objective metrics derived from measures o ...

2007

QoS control for optimality and safety

Joseph Sifakis

We propose a method for fine grain QoS control of real-time applications. The method allows adapting the overall system behavior by adequately setting the quality level parameters of its actions. The objective of the control policy is to meet QoS requireme ...

2005

Ecological distance use relevance in Mantel tests: application to goat breeds in the Alps

Stéphane Joost, Régis Caloz

In: Sustainable Conservation of Animal Genetic Resources in Marginal Rural Areas: Integrating Molecular Genetics, Socio-Economics and Geostatistical Approaches, ECONOGENE project - QLK5-CT2001 - 02461, Progress Report Year 3, European Union Project, Qualit ...

2004

Delay aspects in Internet telephony

Catherine Boutremans

In this work, we address the transport of high quality voice over the Internet with a particular concern for delays. Transport of interactive audio over IP networks often suffers from packet loss and variations in the network delay (jitter). Forward Error ...

EPFL2003

Adaptive Joint Playout Buffer and FEC Adjustment for Internet Telephony

Jean-Yves Le Boudec, Catherine Boutremans

We develop a joint playout buffer and Forward Error Correction (FEC) adjustment scheme for Internet Telephony, which incorporates the impact of end-to-end delay on the perceived audio quality. We show that it provides better quality than the adjustment sch ...

2003