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CHAPTER 1
Technical overview
1
1
4:3 TVs showing 16:9 programs
For a standard 4:3 TV showing a widescreen program, the program is too wide to fit on
the screen. The DIRECTV
®
HD Receiver gives you 4 ways to fix the problem:
Letter box: If you choose the letter box format, the 16:9 image is shrunk
until the entire width of the program fits on your TV.
Since the aspect ratio of the program is maintained, the image
is no longer tall enough to fill your screen, so black/gray bars
are seen at the top and bottom of the screen.
Full: If you set your DIRECTV
®
HD Receiver to the Full setting, 16:9
images are stretched to fit the height of the screen, like in the
Letter box format. But instead of applying black/gray bars to
the top and bottom of the screen, the program image is stretched
vertically until it is tall enough to fill your screen.
Your entire TV screen is full, but the program images are a little
stretched to compensate for the program – to – screen mismatch.
Zoom 1: This format stretches the top and bottom edges of the image at
an equal ratio, keeping the 16:9 aspect ratio intact.
The left and right portions of the image will be cut.
Zoom 2: This format breaks the 16:9 aspect ratio and stretches the top
and bottom edges more than the left and right edges of the
image to view less distorted image than the one in Zoom1.
The top, bottom, left and right portions of the image will be
cut, but less than Zoom 1.