Frame Aspect Ratio 7; Active Aspect Ratio 7; Iscan Image Mapping 7 - Abt iScan VP30 Owner's Manual

The Vp30's menu is exit automatically after 30 seconds of no user interaction.
Video input signals are usually classified in the following two ways:
• frame aspect ratio
• active input aspect ratio
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
To use aspect ratio's in addition to these, the iScan VP30 provides the option to choose a custom
aspect ratio called User with a range of 1.01:1-3.00:1.
iScan 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 iScan VP30 maps the AAR to the Output Aspect Ratio (OAR) in the following three ways:.
• When the AAR is greater than OAR, the iScan VP30 puts up Borders at the top and bottom
page 25
as shown below:
page 25
• When the AAR is less than the OAR, the iScan VP30 puts up Borders on the left and right
as shown below:
7
Active Input
Area
Active Input
Area
Active Input
Area
Active Input
Area
Borders
Borders
Borders
Borders