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Recolector de Ciencia Abierta, RECOLECTA
Bachelor thesis . 2017
License: CC BY NC ND
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Adaptive real time multimedia transmission

Transmisión multimedia adaptativa en tiempo real
Authors: Espinach Casacuberta, Luc;

Adaptive real time multimedia transmission

Abstract

Esta tesis es una propuesta de un sistema de streaming de vídeo en directo que utiliza varias tecnologías actuales y, por otro lado, se beneficia del mundo del software libre y de código abierto. El propósito de desarrollar un sistema de este tipo es proporcionar una manera económica de efectuar streaming de vídeo de forma portátil, manteniendo una alta calidad de imagen. Con el fin de obtener un prototipo cuyas especificaciones compitan con los requerimientos de un sistema de streaming actual se han estudiado los siguientes puntos clave: - Transmisión de video mediante el estándar de MPEG, Dynamic Adaptive Streaming over HTTP, también conocido como MPEG-DASH. - Simulación de red de área amplia mediante WANem y análisis del tráfico de red. - Códecs de vídeo optimizados para dispositivos integrados: OpenMAX. - Uso de plataformas multimedia de código abierto. Después de este estudio, se propondrá una solución final para el sistema y se hará una evaluación de ésta en un entorno de simulación.

Aquesta tesi és una proposta d' un sistema de streaming de vídeo en directe que utilitza diverses tecnologies actuals i, d'altra banda, es beneficia dels avantatges del món del programari lliure i codi obert. L'objectiu de desenvolupar un sistema d'aquest tipus és proporcionar una forma econòmica per al streaming de vídeo portàtil, mantenint l'alta qualitat d'imatge. Els punts clau següents s'han estudiat per obtenir un prototip les especificacions del qual puguin competir amb les exigències actuals: - Transmissió de vídeo utilitzant l'estàndard d'MPEG, Dynamic Adaptive Streaming over HTTP, també conegut com MPEG-DASH. - Simulació de xarxa de llarg abast mitjançant WANem i anàlisi del tràfic de xarxa. - Codecs de vídeo optimitzats per sistemes integrats: OpenMAX. - Ús de plataformes multimèdia de codi obert. Després d'aquest estudi, es proposarà una solució final per al sistema i es farà una avaluació d'aquesta en un entorn de simulació.

This thesis is a proposal of an integrated video live streaming system that uses several state of the art technologies and, in the other hand, benefits from the royalty-free world of free and open-source software. The purpose of developing such a system is to provide an inexpensive way of making portable and high quality video streaming possible to the user. In order to obtain a prototype with specifications that compete with the modern video streaming requirements the following key points have been studied: - Video transmission using MPEG's standard Dynamic Adaptive Streaming over HTTP, also known as MPEG-DASH. - Wide Area Network simulation using WANem and network traffic analysis. - Video codecs optimized for embedded devices: OpenMAX. - Usage of open-source multimedia platforms. Once studied all of the stages of the system separately, a final solution will be proposed. This solution will be evaluated in a simulation environment.

A system for the capture, coding and adaptive transmission of audiovisual content using free software will be designed and implemented. The main software components used will be: a) UltraGrid: https://github.com/CESNET/UltraGrid/wiki b) LiveMediaStreamer: https://github.com/ua-i2cat/liveMediaStreamer c) GPAC: https://gpac.wp.imt.fr/2017/02/01/hevc-tile-based-adaptation-guide/ Reference document: http://biblio.telecom-paristech.fr/cgi-bin/download.cgi?id=15580 http://www.barcelonalab.cat/uploads/dwn/bcnlab683.pdf

Country
Spain
Keywords

gstreamer, live, Estàndard MPEG, gpac, MPEG-DASH, Real-time data processing, ffmpeg, streaming, Temps real (Informàtica), Àrees temàtiques de la UPC::Enginyeria civil, MPEG (Video coding standard)

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selected citations
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This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
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popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
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