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Assessing and enhancing the accessibility of emerging connected tv applications

2025-03-20Doctoral thesis Open access
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datacite.subject.fosCiências Naturais::Ciências da Computação e da Informaçãopt_PT
dc.contributor.advisorDuarte, Carlos Alberto Pacheco dos Anjos
dc.contributor.authorCosta, Daniel Filipe Ribeiro da
dc.date.accessioned2025-06-06T16:47:25Z
dc.date.available2025-06-06T16:47:25Z
dc.date.issued2025-03-20
dc.date.submitted2024-10-31
dc.description.abstractConnected TV’s technological advances in the last years provide users with a better experience in terms of image,sound and interactive capabilities. By enabling access to the internet, connected TVs have extended the reach of multimedia content they offer. Like everyone else, people with visual disabilities want to watch and make use of the these TV platforms’ new features. The goal of this PhD thesis is to characterize and address Connected TV’s accessibility problems, with a special emphasis on visually impaired users. This dissertation describes the methodology applied to achieve this goal. The first step employed both qualitative and quantitative research methods to understand the interest of these users on this type of device, and to fully characterize their interaction difficulties and needs. A second stage aimed to explore the increasing trend of integrating mobile devices and TV platforms to propose and validate accessible solutions involving multiple modalities or adaptive interaction in order to increase the accessibility of the resulting TV platform. Results from the first stage revealed several accessibility issues with TV based applications when compared with their Desktop versions even though the automated accessibility evaluation favors the former. The survey results confirms the difficulties these users face everyday when interacting with their TV sets and underlines their willingness to welcome a new alternative that ameliorates this interaction. In the second stage, we followed an User Centered Design approach to develop our solution. The result was A4TV (Accessibility for TV),an adaptive multimodal assistive technology for TV platforms. Each iteration focused on different features and aspects that we intended to research. From every iteration resulted a list of Design Recommendations that condensed the findings from the different employed studies. We could find interesting results related with audio rendering content and contextual information from TV applications, alternative methods of input and the suggestion of adaptations to the user based on explicit and implicit knowledge.pt_PT
dc.identifier.tid101482051pt_PT
dc.identifier.urihttp://hdl.handle.net/10400.5/101422
dc.language.isoengpt_PT
dc.subjectConnected TVpt_PT
dc.subjectAdaptationpt_PT
dc.subjectMultimodalitypt_PT
dc.subjectAccessibilitypt_PT
dc.subjectVisually Impaired Userspt_PT
dc.subjectPessoas Invisuaispt_PT
dc.subjectMultimodalidadept_PT
dc.subjectAdaptaçãopt_PT
dc.subjectAcessibilidadept_PT
dc.subjectSistemas Multimodais Adaptativospt_PT
dc.titleAssessing and enhancing the accessibility of emerging connected tv applicationspt_PT
dc.typedoctoral thesis
dspace.entity.typePublication
rcaap.rightsopenAccesspt_PT
rcaap.typedoctoralThesispt_PT
thesis.degree.nameTese de doutoramento, Informática (Engenharia Informática), Universidade de Lisboa, Faculdade de Ciências, 2025pt_PT

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