NCast Telepresenter M4 - Manual (Page 42)

NCast Telepresenter Reference Manual
4. The Channel Table
4.1. C
HANNEL
S
ETTINGS
A channel is a collection of parameter settings that defines the operating characteristics for a streaming,
webcast or collaborative session. Just as Channel 2 on your TV defines the video carrier to be “55.25 MHz.”,
Channel 2 on a Telepresenter 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 100 channels allowed, so 100 different presets are
available for definition.
Once the channel settings have been established, typically by the administrator of the Telepresenter, or
maybe the IT or Network department within an organization, they will not be changed by ordinary users of
the Telepresenter. The user is instructed to “Use Channel 2” and no further detailed instructions are required.
When a Channel is started the Telepresenter 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 Telepresenter. Any
changes or updates to the Channel Table have no effect on the Session until the next Session start.
Session parameters which may be changed or updated appear on the Sources page and on the Custom
page. Windows and Overlays may be altered during a Session, but the initial Frame size and aspect ratio
may not change. The Frame size MUST remain fixed during a Session.
4.1.1. Channel Initiation
At the left edge of each channel listed is an activation button. Pressing this button activates all the
parameters for the Channel and a new Session based on these settings is started.
4.1.2. Channel Modification
Setup of a Channel is divided into seven parts:
• General – Channel name and network parameters
NCast Corporation Revision 2.2
Page 42