IQUDC30/IQUDC31/IQUDC32/IQUDC33
Operation Using the RollCall Control Panel
Issue 1 Rev 4
Page 58
© 2016 SAM
5.6.7 Aspect Signaling Control – Scaling Control
The Scaling Control functions enable you to configure the ARC output format. The controls
are only active when using input aspect signaling to control the ARC input format. Using input
aspect signaling allows dynamic control of the ARC. A fixed aspect is selected for the output
image, and the aspect signaling then defines the incoming image aspect ratio. As this signal
changes on frame boundaries, the ARC is reconfigured to perform the correct conversion.
5.6.7.1
SD Input Format if Signaling Unknown
When using input aspect signaling with an SD input source, it is possible to set a default input
ARC setting. If, for any reason, the input SD aspect signaling cannot be detected, the ARC
assumes this default setting.
•
Use Manual if Unknown:
Enables manual ARC control.
•
SD Input Format:
The SD input format.
•
Normal:
Default 4:3 aspect ratio.
•
Anamorphic:
Horizontally squeezes a widescreen image to fit a standard 4:3
aspect ratio.
•
Letterbox:
Preserves the original aspect ratio of film shot in a widescreen aspect
ratio, with bars visible at the top and bottom of the screen.
5.6.7.2
SD Output Format
When Aspect Signaling Control is enabled and the output video is SD, this control enables
you to set fixed output aspects for the ARC.
•
Normal:
Default aspect ratio.
•
Anamorphic:
Horizontally squeezes a widescreen image to fit a standard 4:3 aspect
ratio.
5.6.7.3
Conversion Scaling
Conversion Scaling enables you to set fixed ARC output aspects.
•
Fit to Height:
Scales the image to fit the height of the screen while maintaining the
aspect ratio.
•
Fit to Width:
Scales the image to fit the width of the screen while maintaining the
aspect ratio.
•
14:9:
Can scale either a 4:3 image for viewing on a 16:9 screen, or a 16:9 image for
viewing on a 4:3 screen. This is a compromise in order to maintain the aspect ratio of
the image, but will crop some of the image in the process (top and bottom when
viewing 16:9 and left and right when viewing 4:3).
See see section 5.6.8 for a list of possible ARC conversions using input signaling and a
combination of SD Output Format and Scaling Conversion controls.
