NVIDIA Corporation
149
Chapter 7
Configuring Key ForceWare Graphics Driver Features
•
EIA-861B
timing parameters, such as
861B (1920 x 1080 @ 59.94) -I
and
861B (1920 x 1080 @ 59.94) -P
Note: EIA (Electronic Industries Alliance) 861B
timings refers to a CEA/EIA
standard that consists of display timing and formats that allow the graphics
card to connect to Consumer Digital Televisions over a DVI connection and
configure itself for the optimum settings of that display.
•
861B
refers to an EIA/CEA standard and would apply to certain 861 High
Definition television
(HDTV)
displays.
•
-
P
means “progressive scanning,” which is a method of sending an image to
your display where all the scan lines are updated in each frame --- in other
words, all of the scan lines are displayed sequentially. This method, used in
modern computer displays, generally reduces flicker in the displayed image
and results in smoother motion for videos.
•
-I
means “interlaced scanning,” which is another method of sending the image
to your display where even scan lines are drawn during the first field in a frame
and odd scan lines are drawn during the second field in the frame. Another way
to explain this method is that two passes are used to paint an image on the
screen. On the first pass, every other line is painted and on the second pass, the
rest of the lines are painted.
Unlike the “progressive scanning” method, where all the scan lines are updated
in each frame, interlaced scanning results in a higher frame rate but usually
causes image flicker.
Interlaced
mode
Interlaced mode refers to interlaced scanning, which is a method of sending the
image to your display where even scan lines are drawn during the first field in a
frame and odd scan lines are drawn during the second field in the frame.
Unlike the progressive scanning method, where all the scan lines are updated in each
frame, interlaced scanning results in a higher frame rate but usually causes image
flicker.
Pixel clock
Pixel clock indicates how many millions of pixels are output per second. In other
words, this is the frequency at which the display receives pixels from the graphics
card. The value typically lies within a range 10 to 360 MHz, or the DAC maximum
value.
Table 7.2
Advanced Timing Parameters
(continued)
Advanced
Timing
Parameter
Description
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