8
Understanding Aspect Ratio Conversion
Converting between video formats often requires
converting between aspect ratios. Your switcher
supports the following aspect ratio conversion
methods:
•
Full
— The video signal is scaled
disproportionately to fill the display of the new
aspect ratio. Aspect distortion occurs as the image
is stretched/compressed to fit in the new aspect
ratio.
Figure 6
Full Aspect Ratio Conversion
•
Zoom
— The central portion of the video signal is
zoomed to fill the display of the new video format.
No aspect distortion is introduced but the edges of
the video signal may be cropped.
Figure 7
Zoom Aspect Ratio Conversion
•
Letterbox
— Black bars are added to the top and
bottom of a 16:9 image to display correctly in a 4:3
video format.
Figure 8
Letter Box Aspect Ratio Conversion
•
Pillarbox
— Black bars are added to the right and
left of a 4:3 image to display correctly in a 16:9
video format.
Figure 9
Pillar Box Aspect Ratio Conversion
Assigning FCFS Channels
FCFS channels are assigned to either specific inputs
or bus-pairs. Each bus-pair requires two FCFS
channels. The bus-pairs are as follows:
• PGM – Preset buses
• Key 1 Video – Key 1 Alpha buses
• Key 2 Video – Key 2 Alpha buses
• Key 3 Video – Key 3 Alpha buses
• Aux 1 – Not paired
• Aux 2 – Not paired
• Aux 3 – Not paired
FCFS channels maintain separate settings for
different switcher video formats. This lets you change
between switcher video formats without losing FCFS
channel configurations.
Note:
• Using an FCFS channel creates a one frame delay
for the input video being processed.
To assign an FCFS channel:
1.
Press
MENU
.
2.
Press the
REF
Wipe Pattern button.
3.
Press
NEXT
until
Fcfs
is displayed.
4.
Use the
Fcfs
knob to select the FCFS channel
you wish to assign.
5.
Press the
Fcfs
knob to display the
FCFS
menu.
16:9
4:3
4:3
16:9
16:9
4:3
4:3
16:9
4:3
16:9
16:9
4:3
6
4
2
3
1
