González Salinas, Juan
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- PublicationKey Technologies for Networked Virtual Environments(Springer-Verlag, 2023-11) González Salinas, Juan; Boronat Segui, Fernando; Sapena Piera, Almanzor; Pastor Castillo, Francisco Javier; Departamento de Matemática Aplicada; Departamento de Comunicaciones; Departamento de Dibujo; Escuela Politécnica Superior de Gandia; Instituto de Investigación para la Gestión Integrada de Zonas Costeras; Grupo de Investigación y Gestión del Diseño; GENERALITAT VALENCIANA; Agencia Estatal de Investigación; European Regional Development Fund; Universitat Politècnica de València[EN] Thanks to the improvements experienced in technology during the last few years, most especially in virtual reality systems, the number and potential of networked virtual environments or NVEs and their users have been increasing. NVEs aim to give distributed users a feeling of immersion in a virtual world and the possibility of interacting with other users or with virtual objects inside it, just like when they interact in the real world. Being able to provide that feeling and natural interactions when the users are geographically separated is one of the goals of these systems. Nevertheless, this goal is especially sensitive to different issues, such as different connections with heterogeneous throughput or particular network latencies, which can lead to consistency and synchronization problems and, thus, to a worsening of the users' quality of experience or QoE. With the purpose of solving these issues, researchers have proposed and evaluated numerous technical solutions, in fields like network architectures, data distribution and filtering, resource balancing, computing models, predictive modeling and synchronization in NVEs. This paper gathers and classifies them, summarizing their advantages and disadvantages, using a new way of classification. With the current increase in the number of NVEs and the multiple solutions proposed so far, this paper aims to become a useful tool and a starting point not only for future researchers in this field but also for those who are new to NVEs development, in which guaranteeing a good users' QoE is essential.
- PublicationDesign and assessment of a scalable and customizable low-cost tiled display system(Institute of Electrical and Electronics Engineers, 2021-05) Marfil, D.; Boronat Segui, Fernando; González Salinas, Juan; Vidal Meló, Anna; Departamento de Comunicaciones; Escuela Politécnica Superior de Gandia; GENERALITAT VALENCIANA[EN] In this paper, a scalable hardware and software architecture for low-cost tiled display systems (a.k.a. videowalls), customizable through a dynamic web-based management and configuration service is presented and evaluated both objectively and subjectively. It has been designed for both stored and live broadcast/broadband content, in mosaic or warp distributions. The videowalls can be dynamically configured via web in different ways: the displays can create a single screen of a larger size, or they can be configured in a customized way in order to playout different media contents in different display combinations. As display renderers, low-cost devices are proposed as the main hardware element to obtain affordable videowall systems. As a proof of concept, two prototypes have been implemented, including an accurate synchronization mechanism. To evidence the good performance of the prototypes and configuration service, Both objective and subjective evaluations have been conducted regarding synchronization accuracy and usability of the configuration service, obtaining satisfactory results.
- PublicationIntegration of multi-sensorial effects in synchronised immersive hybrid TV scenarios(Institute of Electrical and Electronics Engineers, 2022) Marfil, Daniel; Boronat Segui, Fernando; González Salinas, Juan; Sapena Piera, Almanzor; Departamento de Matemática Aplicada; Departamento de Comunicaciones; Escuela Politécnica Superior de Gandia; Instituto de Investigación para la Gestión Integrada de Zonas Costeras; UNIVERSIDAD POLITECNICA DE VALENCIA; Universitat Politècnica de València[EN] Traditionally, TV media content has exclusively involved 2D or 3D audiovisual streams consumed by using a simple TV device. However, in order to generate more immersive media consumption experiences, other new types of content (e.g., omnidirectional video), consumption devices (e.g., Head Mounted Displays or HMD) and solutions to stimulate other senses beyond the traditional ones of sight and hearing, can be used. Multi-sensorial media content (a.k.a. mulsemedia) facilitates additional sensory effects that stimulate other senses during the media consumption, with the aim of providing the consumers with a more immersive and realistic experience. They provide the users with a greater degree of realism and immersion, but can also provide greater social integration (e.g., people with AV deficiencies or attention span problems) and even contribute to creating better educational programs (e.g., for learning through the senses in educational content or scientific divulgation). Examples of sensory effects that can be used are olfactory effects (scents), tactile effects (e.g., vibration, wind or pressure effects), and ambient effects (e.g., temperature or lighting). In this paper, a solution for providing multi-sensorial and immersive hybrid (broadcast/broadband) TV content consumption experiences, including omnidirectional video and sensory effects, is presented. It has been designed, implemented, and subjectively evaluated (by 32 participants) in an end-to-end platform for hybrid content generation, delivery and synchronised consumption. The satisfactory results which were obtained regarding the perception of fine synchronisation between sensory effects and multimedia content, and regarding the users' perceived QoE, are summarised and discussed.