DirecTV HR34 User Manual page 166

APPENDIX 5: ABOUT HIGH-DEFINITION
16:9 TVs Showing 4:3 programs
For a wide screen 16:9 TV showing a standard 4:3 TV program, the program is too tall to fit the screen. Your choices here include:
Pillar Box: Here the 4:3 image is shrunk until the entire height of the program fits on your TV. Since the aspect ratio is maintained,
the image is no longer wide enough to fill the screen, so gray or black bars are seen at the left and right edges. To change the bar
color, press MENU, select "Settings & Help", "Settings", "HDTV" and then "Video". Select the desired bar color option. See your TV's
owner's manual for information on the best color for your set.
Stretch: In this setting, instead of adding bars to the sides, the 4:3 program image is stretched horizontally until it's wide enough to
fill the screen. Your entire screen will be full, but the images are a little stretched to compensate.
Crop: This format crops (cuts off) the top and bottom of a 4:3 frame, keeping the 4:3 ratio intact.
If your display is a 16:9 format TV or monitor, your format options include these:
For 4:3 program signals:
Crop
Pillar Box Stretch
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