User`s guide

Software Overview
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Logical Playback and Record Units
Logical units enable media ports to play and record clips. Each SGI Media Server unit can
be thought of as a logical VTR transport that is capable of loading, cueing, playing, and
recording clips using a specific media port.
Logical units are created automatically by VST when the SGI Media Server control GUI
or an automation controller is used. When MVCP is used, a command requests that a unit
be added or that a unit created by another control connection be used.
There is normally a one-to-one relationship between a control connection to the
SGI Media Server and a VST logical unit and between a logical unit and a media port.
This is shown in Figure 1-3.
Figure 1-3 One Logical Unit with One Control Connection
Control
port
Logical
unit
Automation
controller
Media port
Playback/recording
device