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R699751 - DreamScaler3 User Manual
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Frame Aspect Ratio
Frame Aspect Ratio (FAR) consists of two possible ratios: 4:3 or 16:9. DVD discs encoded in a 16:9 frame are
sometimes referred to as anamorphic or enhanced for widescreen TV’s. For example, a non-anamorphic
widescreen DVD has a FAR of 4:3.
Active Aspect Ratio
Active Aspect Ratio (AAR) is the aspect ratio of the image or content (movie). This content is typically stated on the
back cover of DVD discs. Some common active aspect ratios are as follows:
•
1.33:1 (4:3)
•
1.55:1
•
1.66:1
•
1.78:1 (16:9)
•
1.85:1
•
2.35:1 (Cinemascope)
To use aspect ratio’s in addition to these, the DreamScaler3 provides the option to choose a custom aspect ratio
called User with a range of 1.01:1-3.00:1.
DreamScaler3 Image Mapping
The situation when the Frame Aspect Ratio (FAR) is the same as the Active Aspect Ratio (AAR) is sometimes
called Full Frame. This situation is illustrated below.
The DreamScaler3 maps the AAR to the Output Aspect Ratio (OAR) in the following three ways:
•
When the AAR is greater than OAR, the DreamScaler3 puts up Borders at the top and bottom as shown below:
•
When the AAR is less than the OAR, the DreamScaler3 puts up Borders on the left and right as shown below:
•
When the AAR is equal to the OAR (Output Aspect Ratio), the DreamScaler3 supplies no border as shown
Borders
Active Input Area
Borders
Active Input
Area
