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Subtitling 3D VR Content with Limited 6DoF: Presentation Modes and Guiding Methods

1
Departament d’Informàtica, Universitat de València, 46010 València, Spain
2
Fundació i2CAT, 08034 Barcelona, Spain
*
Author to whom correspondence should be addressed.
Academic Editor: Yun Jang
Appl. Sci. 2021, 11(16), 7472; https://doi.org/10.3390/app11167472
Received: 27 July 2021 / Revised: 8 August 2021 / Accepted: 12 August 2021 / Published: 14 August 2021
(This article belongs to the Special Issue Recent Advances on Virtual/Augmented/Mixed Reality and Post COVID-19)
All multimedia services must be accessible. Accessibility for multimedia content is typically provided by means of access services, of which subtitling is likely the most widespread approach. To date, numerous recommendations and solutions for subtitling classical 2D audiovisual services have been proposed. Similarly, recent efforts have been devoted to devising adequate subtitling solutions for VR360 video content. This paper, for the first time, extends the existing approaches to address the challenges remaining for efficiently subtitling 3D Virtual Reality (VR) content by exploring two key requirements: presentation modes and guiding methods. By leveraging insights from earlier work on VR360 content, this paper proposes novel presentation modes and guiding methods, to not only provide the freedom to explore omnidirectional scenes, but also to address the additional specificities of 3D VR compared to VR360 content: depth, 6 Degrees of Freedom (6DoF), and viewing perspectives. The obtained results prove that always-visible subtitles and a novel proposed comic-style presentation mode are significantly more appropriate than state-of-the-art fixed-positioned subtitles, particularly in terms of immersion, ease and comfort of reading, and identification of speakers, when applied to professional pieces of content with limited displacement of speakers and limited 6DoF (i.e., users are not expected to navigate around the virtual environment). Similarly, even in such limited movement scenarios, the results show that the use of indicators (arrows), as a guiding method, is well received. Overall, the paper provides relevant insights and paves the way for efficiently subtitling 3D VR content. View Full-Text
Keywords: accessibility; guiding methods; immersive media; subtitling; virtual reality accessibility; guiding methods; immersive media; subtitling; virtual reality
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MDPI and ACS Style

Montagud, M.; Hurtado, C.; De Rus, J.A.; Fernández, S. Subtitling 3D VR Content with Limited 6DoF: Presentation Modes and Guiding Methods. Appl. Sci. 2021, 11, 7472. https://doi.org/10.3390/app11167472

AMA Style

Montagud M, Hurtado C, De Rus JA, Fernández S. Subtitling 3D VR Content with Limited 6DoF: Presentation Modes and Guiding Methods. Applied Sciences. 2021; 11(16):7472. https://doi.org/10.3390/app11167472

Chicago/Turabian Style

Montagud, Mario, Cristian Hurtado, Juan A. De Rus, and Sergi Fernández. 2021. "Subtitling 3D VR Content with Limited 6DoF: Presentation Modes and Guiding Methods" Applied Sciences 11, no. 16: 7472. https://doi.org/10.3390/app11167472

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