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參數(shù)資料
| 型號(hào)： | ADV7322 |
| 廠商： | Analog Devices, Inc. |
| 英文描述： | Multiformat 11-Bit HDTV Video Encoder |
| 中文描述： | 多格式11位高清晰度電視視頻編碼器 |
| 文件頁(yè)數(shù)： | 53/88頁(yè) |
| 文件大?。?/td> | 991K |
| 代理商： | ADV7322 |
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Preliminary Technical Data
ADV7322
SD Brightness Detect
[Subaddress 0x7A]
Rev. PrA | Page 53 of 88
The ADV7322 allows monitoring of the brightness level of the
incoming video data. Brightness detect is a read-only register.
Double Buffering
[Subaddress 0x13, Bit 7; Subaddress 0x48, Bit 2]
Double buffered registers are updated once per field on the
falling edge of the VSYNC signal. Double buffering improves
the overall performance since modifications to register settings
will not be made during active video, but takes effect on the
start of the active video.
Double buffering can be activated on the following HD
registers: HD Gamma A and Gamma B curves and HD CGMS
registers.
Double buffering can be activated on the following SD registers:
SD Gamma A and Gamma B curves, SD Y Scale, SD U Scale, SD
V Scale, SD Brightness, SD Closed Captioning, and SD
Macrovision Bits 5 to 0.
NTSC WITHOUT PEDESTAL
VNO SETUP
POSITIVE SETUP
VALUE ADDED
100 IRE
0 IRE
NEGATIVE SETUP
VALUE ADDED
–7.5 IRE
+7.5 IRE
0
Figure 68. Examples of Brightness Control Values
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