Vertical blanking interval controls – Grass Valley 8964FS User Manual
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8964FS Instruction Manual
Configuration
A field freeze provides less resolution and no motion artifacts in the output.
In frame mode, the resolution is higher since both fields are present, but the
presentation of the two fields can cause motion artifacts.
Vertical Blanking Interval Controls
The 8964FS provides line-by-line vertical blanking interval (VBI) pro-
cessing.
Line Categories
The line categories used in the configuration of the video signal for the
8964FS are defined as follows:
•
F_Active Lines – the portion of the active video that is fixed and always
treated by the module as carrying active video (not programmable).
•
P_Active Lines – lines in the active video that can be configured by the
user to carry either active video or be reserved for carrying user data.
•
CVBI – the lines in the vertical interval that can be configured by the
user.
•
FVBI – the line in the vertical blanking interval that are fixed and are not
configurable.
The line numbers for each category above are defined in
525 and 625 line rates.
Table 3. Line Numbers for 8964FS Line Categories
Line Categories
Label
525
625
Start
End
Start
End
F_Active
25 (F1)
288 (F2)
263 (F1)
525 (F2)
29 (F1)
342 (F2)
310 (F1)
623 (F2)
P_Active
21 (F1)
284 (F2)
24 (F1)
287 (F2)
24 (F1)
337 (F2)
28 (F1)
341 (F2)
CVBI
10 (F1)
273 (F2)
20 (F1)
283 (F2)
6 (F1)
319 (F2)
23 (F1)
336 (F2)
FVBI
1 (F1)
264 (F2)
9 (F1)
272 (F2)
624 (F1)
311 (F2)
5 (F1)
318 (F2)