HD3G7 HD 3 Gb/s SDI Video Generator module
Most AF D codes d
o not require bar data information; only the first user data
wordneedstobedefi ned. For example, one common AFD code for a 16:9 coded
frame is “1001” (9), which indicates a 4:3 image, horizonta lly centered, with
pillarboxes, as shown in the following figure:
Figure 3-95: AFD code “1001” for a 1 6:9 coded frame
Therefore, for this AFD code set the data words as follows:
UDW [000]:
UDW [001]:
UDW [002]:
UDW [003]:
UDW [004]:
UDW [005]:
UDW [006]:
UDW [007]:
0x4C
0x00
0x00
0x00
0x00
0x00
0x00
0x00
The AFD ancillary data packet should be located in the active line portion of
the vertical ancillary space (VANC), but no earlier than the second line after
the RP 1 68 switch point. Line 9 with a sample offset of 0 (first word of active
video, immediately after SAV) is a suitable location. The selected video channel
shou
ld be “Luma” for most ancillary packets, including AFD. Finally, set the
ANC PAYLOAD Output mode to Continuous to start AFD insertion of the
active test signal. For this example, t he SMPTE RP 219 color bars are an effective
test pattern, because the center section of the 16:9 test signal c ontains the original
4:3 aspect ratio SMPTE pattern.
TG8000 Multiformat Test Signal Generator User Manual 3–207
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