IPTV using P2PSP and HTML5+WebRTC



Cristóbal Medina-López, Juan Pablo García Ortiz and

J. A. M. Naranjo


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L. G. Casado and Vicente González-Ruiz


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Department of Informatics, University of Almería, Spain


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URL of these Slides



http://www.p2psp.org/slides/Web-TV-Convergence-2014

What is IPTV?



ITU-T's (adapted) definition: “IPTV is defined as multimedia services (such as television/video/audio/text/graphics/data) delivered over IP based networks managed to provide the required level of quality of experience (reliability, delay, interactivity, etc.) and security (integrity, pay-per-view, etc.).”


Network models for IPTV


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Service models for IPTV over Unicast


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Notice that, unlike the Client/Server Model, the P2P Model takes advantage of the Clients's (Peers) bandwidth!

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P2PSP vs. Client/Server Architecture


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  • Notice that:

    1. The P2PSP's Splitter node (S in red) only sends a copy of the stream regardless of the number of Peers (P). In a C/S system, the Server (S in green) sends as many copies as Clients (C).

    2. If a link or a Peer fails in a P2PSP team, the lost chunks are dispersed in time. Therefore, signal interpolation could be efficiently used to hide to the users this lost of information.

What isMeny?



W3C's definition:“HTML5 is the cornerstone of the W3C's open Web platform; a framework designed to support innovation and foster the full potential the Web has to offer.”
One of the key advances is the HTML <video> tag, which provides the playback of a stream of a video without third party software.

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Googl'es definition: “WebRTC is a free, open project that enables Web browsers with Real-Time Communications (RTC) capabilities via simple JavaScript APIs.”



(HTML5+WebRTC+P2PSP)-based Streaming

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A Demo


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Unfortunately, at this momment ...



  1. Media Source Extensions (the W3C Candidate Recomendation which extends the HTMLMediaElement interface to allow JavaScript to generate media streams for playback) are only implemented in Google Chrome and only works with the complete WebM streams.

  2. WebRTC is not supported by all Web browsers.

  3. There is not a video format recognized by all Web browsers (even Chrome, Firefox and Opera).

Summarizing



  1. Data replication required by IPTV can be achieved at the application layer using P2P techniques.

  2. Although some improvements should be performed, the Web provides (or is going to have) enough functionality to develop massive (P2P-based) IPTV systems.

Thanks!