Publication: Analisis y comparativa de los protocolos de transmisión de vídeo adaptativo por internet
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2014
Defense date
2014-09-19
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Abstract
La TV por Internet es ya una realidad. Cada vez son más los usuarios que utilizan sus dispositivos móviles para ver algún programa de TV y cada vez son más los operadores que ofrecen contenido “live” para retransmitir los eventos más importantes de la actualidad. Los móviles, los iPad/tablets o los ordenadores portátiles van ganando terreno a la TV tradicional.
En este Proyecto Fin de Carrera se realiza un estudio de los cuatro protocolos más importantes actualmente para ofrecer vídeo por Internet de forma adaptativa: Smooth Streaming, HLS, HDS y MPEG-DASH (éste último aún en fase de desarrollo). Todos ellos están basados en el protocolo HTTP.
El proyecto abarca una serie de pruebas en un entorno de laboratorio con propiedades “live” que nos permitirá realizar una comparativa entre los protocolos y aprender su modo de funcionamiento.
El objetivo es ofrecer al usuario la mejor calidad posible adecuándose al dispositivo que utiliza y el entorno en el que esté. Aún hay mucho margen de mejora por delante, esto es solo el comienzo.
TV via the Internet is already a fact. There are more and more users using their mobile devices to watch TV programmes and also there are progressively more operators that offer “live” content in order to broadcast the most important current events. Mobile phones, tablets or laptops are catching up with traditional TV. In this Final-Year Proyect we analyse the currently four most important adaptive streaming video protocols: Smooth Streaming, HLS, HDS and MPEG-DASH (the last one still in development phase). All of them are based on the HTTP protocol. The Proyect contains various tests in a laboratory environment with “live” properties which will allow us to make a comparison between the different protocols and learn their operation modes. The aim is to offer the user the best possible quality depending on the device and environment in use. There are lots of issues to improve upon, but this is just the beginning.
TV via the Internet is already a fact. There are more and more users using their mobile devices to watch TV programmes and also there are progressively more operators that offer “live” content in order to broadcast the most important current events. Mobile phones, tablets or laptops are catching up with traditional TV. In this Final-Year Proyect we analyse the currently four most important adaptive streaming video protocols: Smooth Streaming, HLS, HDS and MPEG-DASH (the last one still in development phase). All of them are based on the HTTP protocol. The Proyect contains various tests in a laboratory environment with “live” properties which will allow us to make a comparison between the different protocols and learn their operation modes. The aim is to offer the user the best possible quality depending on the device and environment in use. There are lots of issues to improve upon, but this is just the beginning.
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Keywords
Vídeo adaptativo, CDN, HLS, HDS, HTTP, Smooth, Segmentos, DVR, Manifest, Stream, Calidades, Reproductor