Denon AVR-X2300W Owner's Manual page 176

Contents Connections
o Aspect Ratio
Set the aspect ratio for the video signals output to the HDMI.
16:9
(Default):
4:3 :
0 This item can be set when "i/p Scaler" is set to "On". (v p. 174)
Front panel Display
Playback
Output at 16:9 aspect ratio.
Output at 4:3 aspect ratio with black bars
on the sides of a 16:9 TV screen. (except
for 480p/576p output)
Rear panel
Settings
176
Remote
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