Picture Formats - Technicolor UIW8001 Installation Manual

Picture Formats

What Is the Difference Between a Standard-Screen and a Wide-Screen
HDTV?
The type of screen your HDTV has (wide-screen or standard-screen) determines how the set-top box
displays programs on the screen. The picture format for an HDTV is a combination of aspect ratio and
screen resolution and is different for standard-screen and wide-screen HDTVs.
What Is Aspect Ratio?
An aspect ratio is the ratio of the width to the height of the TV screen. The aspect ratios differ because
the television industry manufactures both standard-screen and wide-screen HDTVs to appeal to consumer
viewing preferences.
What Is the Screen Resolution?
The screen resolution indicates the amount of detail that the picture displays. Resolution is identified by
the number of display lines on the screen. The techniques that an HDTV uses to "paint" the picture on the
screen are referred to as progressive and interlaced.
With the progressive scanning method, the lines are drawn on the screen one at a time in sequential
order. Progressive scanning results in a more detailed image on the screen and is also less susceptible to the
flicker commonly associated with interlaced scanning. The interlaced method involves refreshing pixels in
alternation — first the odd lines and then the even lines.
For advanced setup, select the screen resolution that your TV can support. See your HDTV user manuals
to choose the proper screen resolution (480i, 576i, 720p, 1080i, or 1080p) for your setup.
For example, a screen resolution of 1080i indicates that the screen shows 1080 lines in an interlaced display,
and 720p indicates that the screens shows 720 lines in a progressive display.
A standard-screen SDTV has a 4x3
aspect ratio. The screen is 4 units wide for
every 3 units tall.
4
3
A screen resolution of 480i or 516i fills
the screen.
20
A wide-screen HDTV is one-third wider than
a standard-screen HDTV. The screen is 16 units
wide for every 9 units tall.
16
9
A screen resolution of 720p or 1080i fills
the screen.
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