134 citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- Universidad Politécnica de MadridES6 papers
- Software (Spain)ES4 papers
- Information Processing and Telecommunications CenterES3 papers
- AGH University of KrakowPL2 papers
- Halmstad UniversitySE2 papers
- Universidad Autónoma de MadridES2 papers
- Comunidad de MadridES1 paper
- Institute for Telecommunication SciencesUS1 paper
- National Telecommunications and Information Administration1 paper
- University of MaltaMT1 paper
11 papers
Energy- and Quality-Aware Video Request Policy for Wireless Adaptive Streaming Clients
César Díaz, Antonio Fernández, Fernando Sacristán +1
We present a straightforward, non-intrusive adaptive bit rate streaming segment quality selection policy which aims at extending battery lifetime during playback while limiting the…
XLR (piXel Loss Rate): a Lightweight Indicator to Measure Video QoE in IP Networks
César Díaz, Pablo Pérez, Julián Cabrera +2
A novel Key Quality Indicator for video delivery applications, XLR (piXel Loss Rate), is defined, characterized, and evaluated. The proposed indicator is an objective measure that…
Perceptually Equivalent Resolution in Handheld Devices for Streaming Bandwidth Saving
Mateo Cámara, César Díaz, Juan Casal +2
We present the description, results, and analysis of the experiments conducted to find the equivalent resolution associated with handheld devices. That is, the resolution from whic…
Facial Soft Biometrics for Recognition in the Wild: Recent Works, Annotation, and COTS Evaluation
Ester Gonzalez-Sosa, Julian Fierrez, Ruben Vera-Rodriguez +1
The role of soft biometrics to enhance person recognition systems in unconstrained scenarios has not been extensively studied. Here, we explore the utility of the following modalit…
Emerging Immersive Communication Systems: Overview, Taxonomy, and Good Practises for QoE Assessment
Pablo Pérez, Ester Gonzalez-Sosa, Jesús Gutiérrez +1
Several technological and scientific advances have been achieved recently in the fields of immersive systems, which are offering new possibilities to applications and services in d…
A Survey of Super-Resolution in Iris Biometrics with Evaluation of Dictionary-Learning
F. Alonso-Fernandez, R. A. Farrugia, J. Bigun +2
The lack of resolution has a negative impact on the performance of image-based biometrics. While many generic super-resolution methods have been proposed to restore low-resolution…
Generalised Score Distribution: A Two-Parameter Discrete Distribution Accurately Describing Responses from Quality of Experience Subjective Experiments
Jakub Nawała, Lucjan Janowski, Bogdan Ćmiel +2
Subjective responses from Multimedia Quality Assessment (MQA) experiments are conventionally analysed with methods not suitable for the data type these responses represent. Further…
Subjective Assessment Experiments That Recruit Few Observers With Repetitions (FOWR)
Pablo Perez, Lucjan Janowski, Narciso Garcia +1
Recent studies have shown that it is possible to characterize subject bias and variance in subjective assessment tests. Apparent differences among subjects can, for the most part,…
Methodology to Assess Quality, Presence, Empathy, Attitude, and Attention in 360-degree Videos for Immersive Communications
Marta Orduna, Pablo Pérez, Jesús Gutiérrez +1
This paper analyzes the joint assessment of quality, spatial and social presence, empathy, attitude, and attention in three conditions: (A)visualizing and rating the quality of con…
Methodology for accurately assessing the quality perceived by users on 360VR contents
Lara Muñoz, César Díaz, Marta Orduna +4
To properly evaluate the performance of 360VR-specific encoding and transmission schemes, and particularly of the solutions based on viewport adaptation, it is necessary to conside…
Video Multimethod Assessment Fusion (VMAF) on 360VR contents
Marta Orduna, César Díaz, Lara Muñoz +3
This paper describes the subjective experiments and subsequent analysis carried out to validate the application of one of the most robust and influential video quality metrics, Vid…