Visualizza wikitesto di Adaptive Live Video Streaming ← Adaptive Live Video Streaming

=Adaptive Live Video Streaming=

'''Adaptive live streaming''' represent a key advancement with respect to classic progressive download streaming such as the one employed by YouTube.
With adaptive streaming the video source bit-rate is adapted on the fly so that the user can experience the maximum quality which is allowed by the time-varying available bandwidth.

The following videos are distributed by employing a prototype implementation of the Quality Adaptation Control algorithm which is described in the paper: 

<paper authors="L. De Cicco, S. Mascolo, V. Palmisano" conference="in Proc. ACM Multimedia Systems" place="San Jose, CA" date="Feb 23-25,2011" pdf='MMSYS2011.pdf'>
Feedback Control for Adaptive Live Video Streaming
</paper>

The video source is adapted by following the stream-switching (or multiple bit-rate) approach: the video source is available at different bit-rates and resolutions and a controller switches from one video version to match the available bandwidth while avoiding playback interruptions and re-buffering events.

''Requirements'': 
* Flash player v10.0 or greater
* In order to experience the maximum quality (720p) a dual core 2.4GHz processor or better is recommended 

==Elephants Dream HD Adaptive Streaming==
<absHTML>
<div id="playerdiv">
    <p>If you don't see the player, install the latest <a href="http://www.macromedia.com/go/getflashplayer">Flash Player plugin</a> (at least v. 10.0 is required).</p>
</div>
<script type="text/javascript" src="http://193.204.59.68:1234/media/js/swfobject.js"></script>
<script type="text/javascript">
<!--
swfobject.embedSWF("http://193.204.59.68:1234/media/player.swf", "playerdiv", "640", "385", "10.0.1","expressInstall.swf", {host: "193.204.59.68", port: 1234, videourl: "893531dae94ad8052b23cffe571b76dc", autostart: "0", buffer_time: "15"}, {menu:"false", allowfullscreen: "true"}, {id:"playerobj", name:"playerobj"});
//-->
</script>
</absHTML>

==D90 HD Adaptive streaming==
<absHTML>
<div id="playerdiv1">
    <p>If you don't see the player, install the latest <a href="http://www.macromedia.com/go/getflashplayer">Flash Player plugin</a> (at least v. 10.0 is required).</p>
</div>
<script type="text/javascript" src="http://193.204.59.68:1234/media/js/swfobject.js"></script>
<script type="text/javascript">
<!--
swfobject.embedSWF("http://193.204.59.68:1234/media/player.swf", "playerdiv1", "640", "385", "10.0.1","expressInstall.swf", {host: "193.204.59.68", port: 1234, videourl: "135854081cb47ac7b77e0a7b0f820844", autostart: "0", buffer_time: "15"}, {menu:"false", allowfullscreen: "true"}, {id:"playerobj1", name:"playerobj1"});
//-->
</script>
</absHTML>

==References==
<paper authors="L. De Cicco, S. Mascolo, V. Palmisano" conference="ACM Multimedia Systems" place="San Jose, CA" date="Feb 23-25,2011" pdf='MMSYS2011.pdf'>
Feedback Control for Adaptive Live Video Streaming
</paper>