Data Translation DT3162, Руководство пользователя

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Principles of Operation
21
Vi
Vi
V
Vi
V
Vi
Vertical Video Signal
Each field of video contains vertical sync information, blanking
information, and lines of active video.
Figure 3 shows the
components of a single vertical field of video. Line measurements are
relative to the vertical reference point, which is defined as the
beginning of the vertical sync.
Note that the ROI is an area that you establish within the active video
area. For more information about ROIs, refer to
page 22 .
Figure 3: Vertical Video Signal
You can use software to define the vertical input settings for the
DT3162.
Table 3 lists the settings you can program.
Blanking
0 1 2 3
n-1
Vertical Reference
Point
First Active Line
ROI Top
ROI Height
Active Video
Vertical Sync
Active Line Count
Total Lines Per Frame