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Listar por autor "de Fez Lava, Ismael"

Mostrando ítems 1-20 de 22

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A DASH server-side delay-based representation switching solution to improve the quality of experience for low-latency live video streaming

Belda Ortega, Román; Arce Vila, Pau; Guerri Cebollada, Juan Carlos; De Fez, Ismael (Elsevier, 2023-11)

[EN] This work addresses the integration of real-time transmission systems, including IP cameras and production systems (like OBS or vMix), that use protocols such as RTSP (Real Time Streaming Protocol) or SRT (Secure ...
A personalized system for scalable distribution of multimedia content in multicast wireless networks

De Fez Lava, Ismael; Gil Pascual, Miriam; Fons Cors, Joan Josep; Guerri Cebollada, Juan Carlos; Pelechano Ferragud, Vicente (Springer, 2014-06-15)

This paper presents a novel architecture for scalable multimedia content delivery over wireless networks. The architecture takes into account both the user preferences and context in order to provide personalized contents ...
A power consumption monitoring, displaying and evaluation system for home devices

Miquel Murcia, Antoni; Belda Ortega, Román; De Fez Lava, Ismael; Arce Vila, Pau; Fraile Gil, Francisco; Guerri Cebollada, Juan Carlos; Martínez Zaldívar, Francisco José; Gallardo Bermell, Sergio (2013)

[EN] This paper presents an implementation of a smart meter monitoring system based on Arduino platform and accessible from Android mobile devices. On the one hand, it has been developed a measure device, based on Arduino, ...
An Adaptive Mechanism for Optimal Content Download in Wireless Networks

De Fez Lava, Ismael; Guerri Cebollada, Juan Carlos (Institute of Electrical and Electronics Engineers (IEEE), 2014-06)

This paper presents an adaptive mechanism for improving the content download in wireless environments. The solution is based on the use of the file delivery over unidirectional transport (FLUTE) protocol in multicast ...
Analysis and evaluation of adaptive LDPC AL-FEC codes for content download services

De Fez Lava, Ismael; Fraile Gil, Francisco; Belda Ortega, Román; Guerri Cebollada, Juan Carlos (Institute of Electrical and Electronics Engineers (IEEE), 2012-06)

This paper proposes the use of adaptive low density parity check (LDPC) application layer-forward error correction (AL-FEC) codes for content download services over erasure channels. In adaptive LDPC codes, clients inform ...
Android real-time audio communications over local wireless

Belda Ortega, Román; Arce Vila, Pau; De Fez Lava, Ismael; Fraile Gil, Francisco; Guerri Cebollada, Juan Carlos (Instituto de Telecomunicaciones y Aplicaciones Multimedia (ITEAM), 2012)

This paper describes an Android mobile application that allows voice communications through short-range wireless networks, mainly Bluetooth and Wi-Fi. The application is able to replicate as close as possible the behavior ...
Effect of the FDT transmission frequency for an optimum content delivery using the FLUTE protocol

De Fez Lava, Ismael; Fraile Gil, Francisco; Guerri Cebollada, Juan Carlos (Elsevier, 2013-07-01)

File Delivery over Unidirectional Transport (FLUTE) is the standard protocol used in unidirectional environments to provide reliability in the transmission of multimedia files. The key element of this protocol is the use ...
EVALUACIÓN SUBJETIVA DE UN SISTEMA DE STREAMING DE VÍDEO BASADO EN DASH

Valle Medina, Fernando David (Universitat Politècnica de València, 2018-10-05)

El objetivo del TFM es realizar una evaluación subjetiva de un sistema de streaming basado en DASH. Para ello se realizará un estudio teórico de los diferentes estándares y soluciones existentes para llevar a cabo dicha ...
Evaluation of a content download service based on FLUTE and LDPC for improving the Quality of Experience over multicast wireless networks

De Fez Lava, Ismael (Editorial Universitat Politècnica de València, 2014-04-17)

Esta tesis estudia la distribución de ficheros en redes inalámbricas, analizando diferentes mecanismos que permiten optimizar la transmisión en términos de ancho de banda y calidad de experiencia. Concretamente, la tesis ...
Evaluation of background push content download services to mobile devices over DVB networks

Fraile Gil, Francisco; De Fez Lava, Ismael; Guerri Cebollada, Juan Carlos (Institute of Electrical and Electronics Engineers (IEEE), 2014-03)

This paper proposes a multicast content download service based on the use of residual network capacity to push multimedia content to available local storage in personal multimedia devices. The service under study is based ...
Hybrid FLUTE/DASH video delivery over mobile wireless networks

Belda Ortega, Román; De Fez Lava, Ismael; Fraile Gil, Francisco; Arce Vila, Pau; Guerri Cebollada, Juan Carlos (Wiley, 2014-11)

This paper describes how FLUTE (File Delivery over Unidirectional Transport) and DASH (Dynamic Adaptive Streaming over HTTP) can be used to provide mobile video streaming services over broadcast wireless networks. FLUTE ...
Implementación y evaluación de la codificación LDPC para la transmisión de ficheros en entornos unidireccionales

De Fez Lava, Ismael (Universitat Politècnica de València, 2013-02-21)

[ES] La utilización de mecanismos FEC (Forward Error Correction) proporciona una mayor fiabilidad en la transmisión de contenido IP en entornos con pérdidas. De entre los distintos tipos de códigos FEC existentes, esta ...
Look ahead to improve QoE in DASH streaming

Belda Ortega, Román; De Fez Lava, Ismael; Arce Vila, Pau; Guerri Cebollada, Juan Carlos (Springer-Verlag, 2020-09)

[EN] When a video is encoded with constant quality, the resulting bitstream will have variable bitrate due to the inherent nature of the video encoding process. This paper proposes a video Adaptive Bitrate Streaming (ABR) ...
Look Ahead: a DASH adaptation algorithm

Belda Ortega, Román; De Fez Lava, Ismael; Arce Vila, Pau; Guerri Cebollada, Juan Carlos (IEEE, 2018-06-08)

This paper proposes a video quality adaptation algorithm based on the Dynamic Adaptive Streaming over HTTP (DASH) standard for on-demand video services. When a video is encoded with constant quality, the resulting bitstream ...
Mejora del streaming de vídeo en DASH con codificación de bitrate variable mediante el algoritmo Look Ahead y mecanismos de coordinación para la reproducción, y propuesta de nuevas métricas para la evaluación de la QoE

Belda Ortega, Román (Universitat Politècnica de València, 2021-07-19)

[ES] Esta tesis presenta diversas propuestas encaminadas a mejorar la transmisión de vídeo a través del estándar DASH (Dynamic Adaptive Streaming over HTTP). Este trabajo de investigación estudia el protocolo de transmisión ...
New objective QoE models for evaluating ABR algorithms in DASH

De Fez Lava, Ismael; Belda Ortega, Román; Guerri Cebollada, Juan Carlos (Elsevier, 2020-05-15)

[EN] As users become more demanding with regards to the consumption of multimedia content, the importance of measuring their level of satisfaction is growing. The difficulty in terms of time and resources for assessing the ...
Performance evaluation and testbed for delivering SRT live content using DASH Low Latency streaming systems

Belda Ortega, Román; Arce Vila, Pau; De Fez, Ismael; Guerri Cebollada, Juan Carlos (ACM, 2022-10-28)

[EN] The work presented in this paper focuses on the implementation of a testbed for the evaluation of content distribution systems using LL-DASH (Low Latency DASH -Dynamic Adaptive Streaming over HTTP-) and devices that ...
Performance evaluation of AL-FEC LDPC codes for push content applications in wireless unidirectional environments

De Fez Lava, Ismael; Fraile Gil, Francisco; Belda Ortega, Román; Guerri Cebollada, Juan Carlos (Springer Verlag (Germany), 2012-10)

FEC (Forward Error Correction) mechanisms improve IP content transmission reliability through the recovery of packets lost in transmission. Opposite to ARQ (Automatic Repeat Request), FEC mechanisms are especially suited ...
Planificación y evaluación de prestaciones de redes Wi-Fi en edificios

Ianni, Stefano Humberto (Universitat Politècnica de València, 2015-07-28)

Este trabajo propone el uso de la tecnología WiFi en sistemas de videoportero digital como una alternativa a la tecnología cableada, la cual se suele utilizar típicamente en los sistemas de control de acceso. Para conseguir ...
Proxy-based near real-time TV content transmission in mobility over 4G with MPEG-DASH transcoding on the cloud

Arce Vila, Pau; De Fez Lava, Ismael; Belda Ortega, Román; Guerri Cebollada, Juan Carlos; Ferrairó, Salvador (Springer-Verlag, 2019-09)

[EN] This paper presents and evaluates a system that provides TV and radio services in mobility using 4G communications. The system has mainly two blocks, one on the cloud and another on the mobile vehicle. On the cloud, ...