Changes between Version 4 and Version 5 of WiMAX/WiMAX-Tutorial/Dash/00


Ignore:
Timestamp:
07/21/13 12:37:58 (6 years ago)
Author:
cbn228@nyu.edu
Comment:

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  • WiMAX/WiMAX-Tutorial/Dash/00

    v4 v5  
    55== The Idea ==
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    7 Dash running on HTTP, is a server-client system. A HTTP Server runs on the server side and provides the media content to the client upon request. The media (MPEG-4 or MPEG-2 video) is divided into several chunks based on both timing and bit-rate. A Media Presentation Description file in XML format serves as a map of the media, enabling the server to send the chunks requested based on the rate adaptation, affected by channel conditions, at a given time.     
     7Dash running over HTTP, is a server-client system. A HTTP Server runs on the server side and provides the media content to the client upon request. The media (MPEG-4 or MPEG-2 video) is divided into several chunks based on both timing and bit-rate. A Media Presentation Description file in XML format serves as a map of the media, enabling the server to send the chunks requested based on the rate adaptation, affected by channel conditions, at a given time.     
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    1616
    1717We will run a series of experiments trying to evaluate 3 primitive dash rate adaptation policies.
    18  * Policy 1: When the buffer is less than 30% full, the bit-rate is becomes 0 ==> The client requests the video in the lowest available bit-rate.
     18 * Policy 1: When the buffer is less than 30% full, the bit-rate is becomes 0 ==> The client requests the video at the lowest available bit-rate.
    1919 * Policy 2: No provision for the bit-rate.
    2020 * Policy 3:  When the buffer is less than 30% full, the bit-rate is halved.