NCast Presentation Recorder Reference Manual
These buttons control fine positioning of the Graphics image (VGA, DVI-A input connector only). The
image will move a few pixels to the left, right, up or down when these buttons are activated. The center
button attempts to center the image properly on the screen.
8.4.3. Layout
Some layouts are a mix of 16:9 and 4:3 windows. If the Swap button is pressed with a mix of two
different window aspect ratios there will be distortion. When there is a change of speakers with a change
of computers, there may be a change of aspect ratios for a given connector. Keeping all these possible
variations captured correctly is a real problem.
This panel allows fine tuning on how input signals are mapped to their respective windows. Techniques
of full-screen stretching, letter-boxing and pillar-boxing may be used.
8.4.4. AV Sync
Viewers notice and are very sensitive to problems with AV Sync (Lip sync). It's a complex problem to
solve and sometimes the audio and video are not in sync when they arrive at the encoder (due to DSP
processing delays for in-room equipment or other causes).
This control panel /- timing adjustment for audio, allowing fine control over aligning video and
audio sync to match perfectly.
The range of adjustment is +/- 500 milliseconds.
8.5. O
VERLAYS
8.5.1. Image Overlays
Enables or disables display of uploaded graphical overlays 1-4. Overlay graphics are initialized from the
Channel Table presets.
The settings of these buttons are OVERWRITTEN during Session start.
NCast Corporation
Revision 1.0
Page 76
