Underscan; Table 6.3 Optimizing Hdtv Viewing - Nvidia FX1300 - Quadro FX 128MB Dual DVI-I PCIe Video Card User Manual

Optimizing HDTV Viewing
Table 6.3
User task
Watch movies
• Browse the Web
• Run Windows
applications
Play full-screen
games

Underscan

The Underscan setting (Figure 6.7) works by centering a lower resolution on the
HDTV screen, the dimensions of which you can further adjust with sliders in the
current release of the driver, as shown in Figure 6.10, "Underscan Screen Resolution
Adjustment Sliders" on page 93.
For component out, NVIDIA determined through market research that 15% overscan
is common with many TVs (both SDTV and HDTV). NVIDIA used this information
to create two custom resolutions that are optimal for Web browsing, running
applications, and playing games on HDTV sets. These resolutions are:
• 720p: 1088 x 612 (85% of the full 1280x720.)
• 1080i: 1600 x 900 (1632 x 918 is 85% of the full 1920x1080, but that is so close to
1600x900 that 1600 x 900 is used instead.)
"Using Underscan" on page
NVIDIA Corporation
Recommended
Corrective
Method Reasons
Native Underscan correction always reduces the quality of the video being
watched since it changes the size of the native video resolution by
compressing the size of the pixels.
In addition, sometimes there is additional electronic information
recorded in the invisible portions of the video stream. This is not
supposed to be seen directly by the user, as it can be very distracting.
Underscan or overscan shift would cause this information to now
become visible.
Overscan shift Browsing the web requires that the end user see all information in the
browser window. Either of these modes will allow the users accomplish
Underscan
this and provide the best web viewing experience.
Underscan If the application correctly queries the graphics driver and requests the
modes it supports, you will be able to play the game in the corrected
underscan mode and see all of the information on your display.
However, some games do not query the graphics driver. Instead,
these games hard code the resolutions supported in the game directly
into their code. Therefore you can use an alternative way to correct
the resolution, such as checking the display for correction options.
92 explains how to use the Underscan setting.
Chapter 6
Configuring HDTV
82