This short-note is on – what you need to know about video on demand?
What is it? Supply video content on users’ demand
What are the variations of video on demand? IVOD, Push VOD, Store and forward and similar.
How video on demand works?
–Tasks by the users: select video and play
–Tasks by the company: supply video in real time, store videos
What are the devices required at client end?
-Remote, Tv, Modem, Set-top box, High speed internet
What are the devices required at company end?
–Storage to store movies like RAID, Farm storage
–Software support to accept, reject client requests
–software support to encode software and send [decode at client terminal]
The architecture the company uses
–centralized servers
–centralized but local buffers at different network sites
–distributed servers, work independently but co-operate and share storage also balance loads
Connection technology?
–Client to company
—–cable, fibre, co-ax
–Company internal?? fibre, cable
Backbone
–fibre or cable and why?
Network architecture in the backbone?
–is it Sonet or ATM; and why
–What are the encoding technologies?
—ADSL, HFC and why??
How to improve performance?
–Areas of Concerns: Buffering, encoding standards, high speed storage, algorithms that require less seek time, networks that provide less jitter and high speed, any caching or proxy will help or not, using p2p will improve performance or not
From: http://sitestree.com/?p=5037
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Post Data:2008-11-23 07:33:48
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