Image Aspect Ratio - evertz 7710ARC Series Manual

7700 MultiFrame Manual
7710ARC Series - SD Aspect Ratio Converter

6.2.1.2. Image Aspect Ratio

The Input Image Aspect Ratio refers to the aspect ratio of the portion of the source frame that is being
utilized for program content when displayed on a display device that is the same aspect ratio as the
source frame. The Output Image Aspect Ratio refers to the aspect ratio of the portion of the destination
frame that is being utilized for program content when displayed on a display device that is the same
aspect ratio as the destination frame. The aspect ratio converter will either, take the full height of the
raster and calculate the width of the image based on the image aspect ratio, or it will take the full width
and calculate the height.
Figure 6-1 to Figure 6-4 provide four common examples of aspect ratio conversion using a 4:3 destination
frame aspect ratio. Note that the distorted circle shown in Figure 6-3, and the undesirable postage effect
in Figure 6-4, are the result of the aspect ratio conversion process being executed without careful
consideration.
4:3
Desintation
Frame
4:3
Input Image
Figure 6-1: 4:3 Full Screen Image
4:3
Destination
Frame
16:9
Anamorphic
Image
Figure 6-3: 16:9 Distorted Image
7710ARC-12
4:3 Destination
Frame
16:9
Input Image
Figure 6-2: 16:9 Letterbox Image
4:3 Destination Frame
4:3 Image inside
16:9 Input image
16:9
Input Image
Figure 6-4: 4:3 Postage Stamp
Revision 1.1