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

All multimedia services must be accessible. Accessibility for content is typically provided by means of access services, which subtitling likely the most widespread approach. To date, numerous recommendations and solutions classical 2D audiovisual have been proposed. Similarly, recent efforts devoted to devising adequate VR360 video content. This paper, first time, extends existing approaches address challenges remaining efficiently 3D Virtual Reality (VR) exploring two key requirements: presentation modes guiding methods. By leveraging insights from earlier work on content, this paper proposes novel methods, not only provide freedom explore omnidirectional scenes, but also additional specificities VR compared content: depth, 6 Degrees Freedom (6DoF), viewing perspectives. The obtained results prove that always-visible subtitles a proposed comic-style mode are significantly more appropriate than state-of-the-art fixed-positioned subtitles, particularly in terms immersion, ease comfort reading, identification speakers, when applied professional pieces with limited displacement speakers 6DoF (i.e., users expected navigate around virtual environment). even such movement scenarios, show use indicators (arrows), as method, well received. Overall, provides relevant paves way