A5083505381- Image and Video Quality Assessment
- Video Coding and Compression Technologies
- Visual Attention and Saliency Detection
- Advanced MIMO Systems Optimization
- Advanced Wireless Communication Techniques
- Millimeter-Wave Propagation and Modeling
- Virtual Reality Applications and Impacts
- Multimedia Communication and Technology
- Advanced Optical Imaging Technologies
- Indoor and Outdoor Localization Technologies
- Network Time Synchronization Technologies
- Advanced Optical Network Technologies
- Radiomics and Machine Learning in Medical Imaging
- Gaze Tracking and Assistive Technology
- Advanced Photonic Communication Systems
- Software-Defined Networks and 5G
- Energy Harvesting in Wireless Networks
- Error Correcting Code Techniques
- Antenna Design and Analysis
- Cooperative Communication and Network Coding
- Autism Spectrum Disorder Research
- Telecommunications and Broadcasting Technologies
- Wireless Networks and Protocols
- PAPR reduction in OFDM
- X-ray Diffraction in Crystallography
Universidad Politécnica de Madrid
2013-2025
Leibniz Institute for Neurobiology
2021-2025
European Telecommunications Standards Institute
2024
Indiana University Bloomington
2024
Leibniz Institute for High Performance Microelectronics
2013-2023
Research Institute Hospital 12 de Octubre
2023
Universidad Complutense de Madrid
2023
Tecnológico de Monterrey
2007-2022
El Colegio de la Frontera Norte
2022
Autonomous University of Chihuahua
2022
Understanding how observers watch visual stimuli like Images and Videos has helped the multimedia encoding, transmission, quality assessment rendering communities immensely, to learn regions important an observer provide him/her optimum of experience. The problem is even more paramount in case 360 degree considering that most/a part content might not be seen by at all, while other maybe extraordinarily important. Attention studies this area however been missing, mainly due lack a dataset...
Research on visual attention in 360° content is crucial to understand how people perceive and interact with this immersive type of develop efficient techniques for processing, encoding, delivering rendering. And also offer a high quality experience end users. The availability public datasets essential support facilitate research activities the community. Recently, some studies have been presented analyzing exploration behaviors watching videos, few published. However, majority these works...
Research in stereoscopic 3D coding, transmission and subjective assessment methodology depends largely on the availability of source content that can be used cross-lab evaluations. While several studies have already been presented using proprietary content, comparisons between are difficult since discrepant contents used. Therefore this paper, a freely available dataset high quality Full-HD sequences shot with semiprofessional camera is introduced detail. The was designed to suited for usage...
This article presents a converged 5G network infrastructure and an overarching architecture to jointly support operational end-user services, proposed by the EU PPP project 5G-XHaul. The 5G-XHaul adopts common fronthaul/backhaul solution, deploying wealth of wireless technologies hybrid active/passive optical transport, supporting flexible fronthaul split options. is evaluated through novel modeling. Numerical results indicate significant energy savings at expense increased service delay.
Social difficulties are the hallmark features of Autism Spectrum Disorder (ASD) and can lead to atypical visual attention towards stimuli. Eye movements encode rich information about psychological factors an individual, which could help characterize traits ASD. Learning eye individuals with ASD various stimuli is important has many application scenarios. However, due lack open datasets, research in this sense still limited. In work, we present dataset children Disorder. It consists 300...
Virtual Reality (VR) provides the users with new immersive media experiences, offering possibility to freely explore 360° content. Understanding these exploration behaviors is crucial for development of efficient techniques processing, coding, delivering and rendering omnidirectional content offer highest possible Quality Experience (QoE). Progress has already been made on visual attention (VA) modeling In this paper we briefly review current status research topic that led us propose a...
To meet the requirements of 5G mobile networks, several radio access technologies, such as millimeter wave communications and massive MIMO, are being proposed. In addition, cloud network (C-RAN) architectures considered instrumental to fully exploit capabilities future RANs. However, RAN centralization imposes stringent on transport network, which today addressed with purpose-specific expensive fronthaul links. As demands networks rise, so will challenges in backhaul segments. It is hence...
Recently an impressive development in immersive technologies, such as Augmented Reality (AR), Virtual (VR) and 360<inline-formula><tex-math notation="LaTeX">${^\circ }$</tex-math></inline-formula> video, has been witnessed. However, methods for quality assessment have not keeping up. This paper studies of video from the cross-lab tests (involving ten laboratories more than 300 participants) carried out by Immersive Media Group (IMG) Video Quality Experts (VQEG). These were addressed to...
Eye tracking has historically been a very popular tool. The data it records allow us to understand how people behave and what they attend within our visual world; under this perspective the experiments, applications use-cases are endless. Therefore, is not surprising witness strong rise in use of eXtended Reality (XR) devices with embedded eye trackers research. These for less obtrusive experimenting conditions, significantly higher experimental control compared traditional desktop testing....
The increased carrier bandwidth and the number of antenna elements expected in 5G networks require a redesign traditional IP-based backhaul CPRI-based fronthaul interfaces used 4G networks. We envision future mobile to encompass these legacy together with novel RAN functional splits. In this scenario, consistent transport network architecture able jointly support 4G/5G is paramount importance. article we present 5G-XHaul, featuring wireless optical technologies multi-technology software...
The future of the manufacturing industry highly depends on digital systems that transform existing production and monitoring into autonomous fulfilling stringent requirements in terms availability, reliability, security, low latency, positioning with high accuracy.In order to meet such requirements, private 5G networks are considered a key enabling technology.In this paper, we introduce 5G-CLARITY system integrates new radio (5GNR), Wi-Fi light fidelity (LiFi) access networks, develops novel...
Free-viewpoint video (FVV) systems allow the viewers to freely change viewpoints of scene. In such systems, view synthesis and compression are two main sources artifacts influencing perceived quality. To assess this influence, quality evaluation studies often carried out using conventional displays generating predefined navigation trajectories mimicking possible movement when exploring content. Nevertheless, as different may lead conclusions in terms visual bench-marking performance methods...
Recently, broadcasted 3D video content has reached households with the first generation of 3DTV. However, few studies have been done to analyze Quality Experience (QoE) perceived by end-users in this scenario. This paper impact transmission errors 3DTV, considering that is delivered side-by-side format over a conventional packet-based network. For purpose, novel evaluation methodology based on standard single stimulus methods and aim keeping as close possible home environment viewing...
Several technological and scientific advances have been achieved recently in the fields of immersive systems, which are offering new possibilities to applications services different communication domains, such as entertainment, virtual conferencing, working meetings, social relations, healthcare, industry. Users these technologies can explore experience stimuli a more interactive personalized way than previous technologies. Thus, considering challenges related systems perceptual dimensions...
We address the problem of interference leakage (IL) minimization in K-user multiple-input multiple-output (MIMO) channel (IC) assisted by a reconfigurable intelligent surface (RIS). describe an iterative algorithm based on block coordinate descent to minimize IL cost function. A reformulation provides geometric interpretation and shows interesting connections with envelope precoding phase-only zero-forcing beamforming problems. As result this analysis, we derive set necessary (but not...
Nowadays, HTTP adaptive streaming (HAS) has become a reliable distribution technology offering significant advantages in terms of both user perceived Quality Experience (QoE) and resource utilization for content network service providers. By trading-off the video quality, HAS is able to adapt available bandwidth display requirements so that it can deliver variety devices over Internet. However, until now there not enough knowledge how adaptation techniques affect end user's visual...
We propose an optical-wireless 5G infrastructure offering converged fronthauling/backhauling functions to support both operational and end-user cloud services. A layered architectural structure required efficiently these services is shown. The data plane performance of the proposed evaluated in terms energy consumption service delay through a novel modelling framework. Our results show that architecture can offer significant savings but there clear trade-off between overall delay.
Abstract Quality assessment is a key element for the evaluation of hardware and software involved in image video acquisition, processing, visualization. In medical field, user-based quality still considered more reliable than objective methods, which allow implementation automated efficient solutions. Regardless increasing research on this topic last decade, defining standards content remains non-trivial task, as focus should be diagnostic value assessed by expert viewers rather perceived...