Grass Valley 8964ENC v.1.2.2 - Manual (Page 22)

22 8964ENC/-FS — Instruction Manual
Configuration
Vertical Blanking Interval Controls
The 8964ENC 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
8964ENC 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 Table 3 for both
525 and 625 line rates.
Table 3. Line Numbers for 8964ENC 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)