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參數(shù)資料
| 型號(hào)： | ADV7312KST |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | 顏色信號(hào)轉(zhuǎn)換 |
| 英文描述： | Multiformat 11-Bit HDTV Video Encoder |
| 中文描述： | COLOR SIGNAL ENCODER, PQFP64 |
| 封裝： | MS-026BCD, LQFP-64 |
| 文件頁(yè)數(shù)： | 54/84頁(yè) |
| 文件大?。?/td> | 975K |
| 代理商： | ADV7312KST |
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REV. 0
–54–
ADV7312
100 IRE
0 IRE
100 IRE
87.5 IRE
12.5 IRE
0 IRE
50 IRE
LUMA CHANNEL WITH
ACTIVE VIDEO EDGE
DISABLED
LUMA CHANNEL WITH
ACTIVE VIDEO EDGE
ENABLED
Figure 51. Example of Active Video Edge Functionality
VOLTS
0
2
4
F2
L135
6
8
10
12
IRE:FLT
–50
0
0
50
100
0.5
Figure 52. Address 0x42, Bit 7 = 0
VOLTS
0
2
–2
4
6
8
10
12
F2
L135
IRE:FLT
–50
0
50
100
0
0.5
Figure 53. Address 0x42, Bit 7 = 1
SD ACTIVE VIDEO EDGE
[Subaddress 42h, Bit 7]
When the active video edge is enabled, the first three pixels and
the last three pixels of the active video on the luma channel are
scaled in such a way that maximum transitions on these pixels
are not possible. The scaling factors are
×
1/8,
×
1/2, and
×
7/8.
All other active video passes through unprocessed.
SAV/EAV Step Edge Control
The ADV7312 has the capability of controlling fast rising and
falling signals at the start and end of active video to minimize
ringing.
An algorithm monitors SAV and EAV and governs when the
edges are too fast. The result will be reduced ringing at the start
and end of active video for fast transitions.
Subaddress 0x42, Bit 7 = 1 enables this feature.
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