Francesca De Simone

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—Scalable video coding is a powerful solution for content delivery in many interactive multimedia services due to its adaptability to varying terminal and network constraints. In order to successfully exploit such adaptability, it is necessary to understand users' preference among various scalability options and consequently develop an optimal bit rate(More)
—Extensive adoption of video surveillance, affecting many aspects of the daily life, alarms the concerned public about the increasing invasion into personal privacy. Therefore, to address privacy issues, many tools have been proposed for protection of personal privacy in image and video. However, little is understood regarding the effectiveness of such(More)
  • F De Simone, M Naccari ': M Tagliasacchi, F Dufaux, S Tubaro, T Ebrahimi
  • 2009
In this paper we describe a database containing subjective assessment scores relative to 78 video streams encoded with H.264/AVC and corrupted by simulating the transmission over error-prone network. The data has been collected from 40 subjects at the premises of two academic institutions. Our goal is to provide a balanced and comprehensive database to(More)
This paper investigates the influence of the combination of the scalability parameters in scalable video coding (SVC) schemes on the subjective visual quality. We aim at providing guidelines for an adaptation strategy of SVC that can select the optimal scalability options for resource-constrained networks. Extensive subjective tests are conducted by using(More)
This paper describes a publicly available database of subjective scores, relative to quality assessment of 156 video streams encoded with H.264/AVC and corrupted by simulating packet losses over an error-prone network. The data has been collected in controlled test environments at the premises of two academic institutions. A detailed statistical analysis of(More)
Keywords: Subjective quality assessment Subjective test Statistical analysis High definition (HD) Video coding High efficiency video coding (HEVC) Joint collaborative team on video coding (JCT-VC) H.264/MPEG-4 AVC a b s t r a c t This paper describes the details and the results of the subjective quality evaluation performed at EPFL, as a contribution to the(More)
Keywords: Video coding Audiovisual focus of attention Quality of experience Audiovisual source localization H.264/AVC Flexible macroblock ordering (FMO) Canonical correlation analysis Subjective quality assessment a b s t r a c t This paper proposes an efficient video coding method using audiovisual focus of attention, which is based on the observation that(More)
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 fundamental to enable validation and comparative benchmarking of the objective algorithms that try to predict(More)
Neutralizing monoclonal antibodies raised against type O foot-and-mouth disease virus have been characterized on the basis of their reactivity with a panel of single site monoclonal antibody-resistant mutants which had defined three antigenic sites. Five antibodies neutralized all these mutants, but by selecting further single site mutants with one of these(More)