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Qualité d'usage en télévision haute définition : évaluations subjectives et métriques objectives

Abstract : High Definition Television (HDTV) is the new broadcasting system expected to offer a deeper immersion in action to the observer and a higher quality of experience than standard television (SDTV). In order to meet these requirements, broadcasters need better adapted quality measurement techniques. The first objective of this thesis is to clarify the impact on visual quality of the transition from SDTV to HDTV. The second is to propose objective quality metrics adapted to HDTV. We first studied some aspects of visual quality in this context. This allowed us to select a subjective assessment methodology to build a H.264-distorted sequence base. Then, we proposed a methodology to assess the impact of a distorting system on visual quality, to be used in the three objective metrics presented. Applied to the first one, it provides a content analysis used to model the visual quality of a sequence. The second one pools local distortion functions in a global quality score thanks to validated models. The last one uses the notion of spatio-temporal tubes introduced by the methodology. Features are extracted in these tubes for reference and distorted sequences. The pooling of features differences provides a final quality score. While the second metric obtains unconvincing results, the two others allow a more effective subjective score prediction than two other known metrics from the literature.
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Contributor : Stéphane Péchard <>
Submitted on : Friday, December 19, 2008 - 3:12:55 PM
Last modification on : Wednesday, December 19, 2018 - 3:02:03 PM
Document(s) archivé(s) le : Thursday, October 11, 2012 - 2:10:35 PM


  • HAL Id : tel-00348586, version 1



Stéphane Péchard. Qualité d'usage en télévision haute définition : évaluations subjectives et métriques objectives. Interface homme-machine [cs.HC]. Université de Nantes, 2008. Français. ⟨tel-00348586⟩



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