MOTU V4HD User Manual page 45

Full Screen (HD to SD)
The Full Screen option (Figure 6-6) also preserves
the aspect ratio of the HD image but scales it
proportionally to fill the full height of the SD frame
(Figure 6-9). As a result, the portions of the HD
image that fall outside the frame (along the left-
hand and right-hand edges) are cropped. But the
full height of the SD frame is used.
Figure 6-9: Full Screen formatting.
Anamorphic (HD to SD)
The Anamorphic option (Figure 6-6) does not
preserve the aspect ratio of the HD image. Instead,
it scales the image to fill the full height of the SD
frame, but it also distorts the HD image
horizontally so it squeezes into the SD frame
(Figure 6-10). As a result, the entire HD image is
preserved, but it appears horizontally compressed.
This option is good for SD material that will be
displayed on a widescreen TV, where it can be
horizontally expanded back to an aspect ratio that
is close to the aspect ratio of the original HD image.
Figure 6-10: Anamorphic formatting.
M O T U V I D E O S E T U P
SD to HD up conversion formats
When an SD source is chosen from the Video
Source menu (Figure 6-5), the Format Conversion
menu appears in the HD signal path, as shown
below in Figure 6-11:
Figure 6-11: SD to HD Format Conversion.
The menu provides the following SD to HD up
conversion formatting options:
Figure 6-12: SD to HD up conversion formatting options.
Pillar Box (SD to HD)
Pillar box formatting is a method for conforming
SD video to an HD video frame while preserving
the original aspect ratio. Since the HD video frame
is more rectangular than SD video, the resulting
image has "black bars" or mattes on either side of
the image (Figure 6-13).
Figure 6-13: Pillar Box formatting.
The Pillar Box option (Figure 6-12) preserves the
aspect ratio of the SD source signal while filling the
HD frame top to bottom. Black bars are added to
HD frame
Source SD image (color bars)
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