Panasonic TU-DST51 Operating Instructions Manual page 17

FEATURES OF THE SET-TOP BOX
Shrink Aspect
The source aspect ratio will be maintained and the picture will shrink into full view on
the screen.
Sidebar Aspect
4:3 pictures will be viewed on a wide aspect TV screen with vertical bars on both sides
of the picture.
Expand Aspect
4:3 pictures will be viewed on a wide aspect TV screen with the picture digitally
"stretched" to fill the screen,
Note: See following page for illustrations of the various aspect ratios.
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