Scientific Atlanta Continuum DVP eXtra Dense QAM Array, System Manual

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Introduction
General
The recent developments of high-capacity digital platforms turned Video On
Demand (VOD) into a hot topic for service providers deploying a HFC network.
VOD provides a choice of several program titles (e.g. movies), which the subscriber
can control to give true VCR functionality. The subscriber is able to pause, rewind,
fast forward, play or halt the service to resume later on where they left off.
VOD Applications
VOD supports different applications:
•
Movies on demand (MOD)
This is the most common application of VOD. The subscriber has a list of movies
to select from whenever he or she wishes. Once bought, the movie is available to
the subscriber for viewing with VCR-like controls within 24 hours.
•
Subscription based movies (SVOD)
SVOD allows subscribers to watch movies from a package at any time for a fixed
monthly fee. A typical example is a children’s programming package that allows
children to select and view cartoons.
•
After-broadcast programming on demand (ABP)
In this application the VOD server is used for real time recording of broadcast
programs which are available for viewing on demand after their scheduled
broadcast time.
•
News or weather on demand
With this service, the viewer can watch previously broadcast news or weather.
Implementing a VOD System
Before making an investment for a VOD system, you should understand today’s
VOD components and existing technologies. With this knowledge you can start to
compare and run test trials. The final choice should be the most cost-effective
solution that best meets the needs of your subscribers.
A VOD system consists of four major components:
•
VOD server
•
Management tools
•
Network transport system
•
Digital set-top box
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B-2 Video On Demand 4004949 Rev C