1. Department of Electronic Technology, GDAF-UC3M, Carlos III University of Madrid, Leganés, Spain
2. Spanish Center for Captioning and Audio Description, Carlos III University of Madrid, Leganés, Spain
3. Department of Applied Communication Sciences, Complutense University of Madrid, Madrid, Spain
4. Department of Computer Science, Oviedo University, Oviedo, Spain
5. Department of Psychiatric, Complutense University of Madrid, Madrid, Spain