NCast Telepresenter M4 - Manual (Page 20)

NCast Telepresenter Reference Manual
cases the required output resolution size must be set with the pull-down tab. All incoming media streams are
scaled to this fixed resolution. There may be a loss of quality if, for example, an incoming XGA image is
scaled to SVGA size.
There are five different timings standards available:
• DMT - VESA Display Monitor Timing
• GTF - VESA Generalized Timing Formula
• CVT - VESA Coordinated Video Timings
• CVT-RB - VESA Coordinated Video Timings with Reduced Blanking
• 861B – CEA/EIA-861B
Consult the technical specifications of your CRT or LCD display to determine which of these settings is
appropriate. Or, plug the display directly into the graphics connector to determine which setting is reported
without the use of any distribution amps, splitters or intervening equipment.
3.4.2. Display Aspect Ratio
The display aspect ratio will normally be auto-detected (as above) through the use of EDID information. If not
correctly detected it may be set through the use of this pull-down menu.
3.4.3. Display Loopback
Turns on and off the loopback of locally generated graphics or video input. If local loopback is not being used
in an installation this setting should be set to “Disabled” as that will free up CPU cycles which are required to
generate the loopbacked image.
3.4.4. Display Loopback Framerate
If local loopback has been selected, the CPU will maintain on the local screen a copy of the material which is
being digitized and sent out as a webcast or recorded as an archive. The process of refreshing this screen
consumes CPU cycles, especially if large resolutions and fast framerates are involved. Excessive CPU
utilization can negatively impact maximum outbound framerates.
NCast Corporation Revision 2.2
Page 20