Liberal Malaina Fidel

Liberal Malaina, Fidel

Personal information

Liberal Malaina, Fidel

Address: Alda. de Urquijo s/n. C.P.: 48013. Bilbao
Office: 3A18
Email: fidel.liberal@ehu.es
Telephone: +34 94 601 4129
Fax: +34 94 601 4259

 

Academic degrees

University degrees

Career: Engineering in Telecommunications
Intensification: Telematics
Center: University of the Basque Country
Date of achievement: 2001

Doctorate

Program title: Tecnologías de la Información Electrónica y Control
DEA date of achievement: 2003
Thesis titlePropuesta de un modelo y una metodología para la gestión de la calidad en los servicios de telecomunicación
Date of achievement: 2005

Conference Papers

Impact Of RLC Losses On Quality Prediction For H.264 Video Over UMTS Networks

Authors:
Asiya Khan, Lingfen Sun, Emmanuel Ifeachor, Jose Oscar Fajardo, Fidel Liberal
Year:
2010
Journal:
2010 IEEE International Conference on Multimedia & Expo (ICME 2010). Singapore. July 19-23
Description:

<span lang="en">In Universal Mobile Telecommunication System (UMTS) Radio Link Control (RLC) losses severely affect the Quality of Service (QoS) due to high error probability. Therefore, for any video quality prediction model, it is important to model the radio-link loss behaviour. In this paper we evaluate the impact of the radio access network on the end-to-end QoS for H.264 encoded video. In order to characterize the QoS level, a learning model based on Adaptive Neural Fuzzy Inference System (ANFIS) is proposed that takes into account the RLC loss models to predict the video quality in terms of the Mean Opinion Score (MOS). The RLC loss models considered are 2-state Markov models with variable mean burst lengths. The aim of the paper is two-fold. First, to find the impact of QoS parameters in both the physical and application layer on end-to-end video quality. Second, to propose a prediction model based on ANFIS to predict video quality over UMTS networks. ANFIS is well suited for video quality prediction over error prone and bandwidth restricted UMTS as it combines the advantages of neural networks and fuzzy systems. The ANFIS model is trained with a combination of application and physical layer parameters. The performance of the proposed model is validated with unseen dataset. These studies should help in the understanding of the impact of both the application and physical layer parameters on end-to-end video quality and in QoS control methods and adaptation.</span>

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