UG-707
ADV8005 Hardware Reference Manual
Figure 133: Example of Video Output with SD Active Video Edge Control Enabled
slope_en
, Encoder Map,
Address 0xE482[7]
This bit is used to enable the SD active video edge control.
Function
slope_en
Description
1
Enabled
0 (default)
Disabled
If a pattern with sharp transitions is being output through the encoder and the user does not want
to have an effect because it softens
the edges, it is possible to use
to control possible ringing artifacts on the output of the encoder.
sd_under_limiter[1:0]
, Encoder Map,
Address 0xE489[1:0]
This signal is used to configure the SD undershoot limiter.
Function
sd_under_limiter[1:0]
Description
00 (default)
Disabled
01
-11IRE
10
-6IRE
11
-1.5IRE
sd_y_min_value
, Encoder Map,
Address 0xE48A[6]
This bit is used to configure the SD minimum luma value.
Function
sd_y_min_value
Description
0 (default)
-40IRE
1
-7.5IRE
7.5.
VERTICAL BLANKING INTERVAL
The
is capable of accepting input VBI data (for example, CGMS, WSS, and CCAP) in SD, ED and HD modes. If VBI is disabled, for
SD mode, see
. VBI data is not present at the encoder output and the entire VBI is blanked. These
control bits are valid in all modes.
For SMPTE 293M (525p), VBI data can be inserted on Lines 13 to 42 of each frame. For ITU-R BT.1358 (625p), VBI data can be inserted on
Lines 6 to 43 For NTSC, VBI data can be inserted on Lines 10 to 20. For PAL, VBI data can be inserted on Lines 7 to 22.
If CGMS is enabled and VBI is disabled, the CGMS data is available at the output.
VOLTS
0
2
–2
4
6
8
10
12
F2
L135
IRE:FLT
–50
0
50
100
0
0.5
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084
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