Accurian Hdtv receiver Owner's Manual page 32

Explanation Of Available Display Modes
This is dependent upon aspect ratio of TV/monitor/projector and aspect ratio of broadcasterʼs feed.
1.
4:3 TV/Monitor/Projector
When the broadcaster is transmitting a 4:3 feed.
The "Normal" display mode is the only available option.
When the broadcaster is transmitting a 16:9 feed.
Wide, Normal, and Zoom display modes are all available.
Wide : Choose this when receiving a 16:9 image and you want to see the original wide format. Letter boxing shrinks the picture so the entire
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image will fit on the screen. Blank panels appear at the top and bottom of the screen.
Normal : Choose this when you want the television to adjust the 16:9 image vertically so it fills your 4:3 screen. No blank panels will be added, and
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the image is vertically stretched.
Zoom : Choose this when receiving a 16:9 image and you want the wide movie format to fill the entire screen. Outer portions of image are cropped, or cut.
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32 Operating
-
wide
wide
Somtimes broadcasters fill a 16:9 aspect ratio feed with vertical bars on the left and right of a 4:3 image.
You will then see blank vertical panels in "Wide" or "Normal" mode. In case of, "zoom" mode allow to see full image
without vertical bars.
*
Denotes default viewing mode.
*
normal
*
normal
-
zoom
zoom