NCast PR-HD - Manual (Page 26)

NCast Presentation Recorder Reference Manual
5. The Channel Table
5.1. C HANNEL S ETTINGS
A “Channel” is a preset or template, a collection of parameter settings that defines the operating
characteristics for a streaming webcast or a recording session. Just as Channel 2 on your TV defines the
video carrier to be “55.25 MHz.”, Channel 2 on a Presentation Recorder might define the graphics multicast
address to be “239.192.0.1”. There are many parameters associated with a Channel, items like the video
and audio multicast or unicast addresses, port numbers, MTU’s, codecs, bit rates, layouts, overlays and
modes of operation. Think of a Channel as a type of “preset” for all of those parameters. There are 25
Channels allowed, so 25 different presets are available for definition.
By default, the encoder comes with 25 factory-defined Channel layouts for the most commonly used inputs
and compositions. These layouts are not “fixed” permanently, but simply examples of commonly used
arrangements. Any Channel may be completely customized by the customer simply by overriding the factory
default settings.
Once the Channel settings have been established, typically by the administrator of the Presentation
Recorder, or maybe the IT or Network department within an organization, they will not be changed by
ordinary users of the Presentation Recorder. The user is instructed to “Use Channel 2” and no further
detailed instructions are required.
When a Channel is started the Presentation Recorder begins its broadcast or recording Session. All of the
many Channel parameters are transferred to the working Session parameters and the encoding and layout
parameters defined by the Channel become the current encoding mode and layout of the Presentation
NCast Corporation Revision 2.2
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