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參數(shù)資料
| 型號(hào)： | ADV7181B |
| 廠商： | Analog Devices, Inc. |
| 英文描述： | Multiformat SDTV Video Decoder |
| 中文描述： | 標(biāo)清多格式視頻解碼器 |
| 文件頁(yè)數(shù)： | 30/96頁(yè) |
| 文件大?。?/td> | 873K |
| 代理商： | ADV7181B |
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ADV7181B
Table 31. AGC Modes
Input Video Type
Any
CVBS
Rev. 0 | Page 30 of 96
Luma Gain
Manual gain luma.
Dependent on horizontal sync depth.
Chroma Gain
Manual gain chroma.
Dependent on color burst amplitude.
Taken from luma path.
Dependent on color burst amplitude.
Taken from luma path.
Dependent on color burst amplitude.
Taken from luma path.
Dependent on color burst amplitude.
Taken from luma path.
Taken from luma path.
Peak White.
Dependent on horizontal sync depth.
Y/C
Peak White.
YPrPb
Dependent on horizontal sync depth.
Luma Gain
LAGC[2:0] Luma Automatic Gain Control, Address 0x30 [7:0]
The luma automatic gain control mode bits select the mode of
operation for the gain control in the luma path.
There are ADI internal parameters to customize the peak white
gain control. Contact ADI for more information.
Table 32. LAGC Function
LAGC[2:0]
Description
000
Manual fixed gain (use LMG[11:0]).
001
AGC (blank level to sync tip). No override through
peak white.
010(default)
AGC (blank level to sync tip). Automatic override
through peak white.
011
Reserved.
100
Reserved.
101
Reserved.
110
Reserved.
111
Freeze gain.
LAGT[1:0] Luma Automatic Gain Timing, Address 0x2F [7:6]
The luma automatic gain timing register allows the user to
influence the tracking speed of the luminance automatic gain
control. Note that this register only has an effect if the
LAGC[2:0] register is set to 001, 010, 011, or 100 (automatic
gain control modes).
If peak white AGC is enabled and active (see the
STATUS_1[7:0] Address 0x10 [7:0] section), the actual gain
update speed is dictated by the peak white AGC loop and, as a
result, the LAGT settings have no effect. As soon as the part
leaves peak white AGC, LAGT becomes relevant again.
The update speed for the peak white algorithm can be
customized by the use of internal parameters. Contact ADI for
more information.
Table 33. LAGT Function
LAGT[1:0]
00
01
10
11 (default)
Description
Slow (TC = 2 sec)
Medium (TC = 1 sec)
Fast (TC = 0.2 sec)
Adaptive
LG[11:0] Luma Gain, Address 0x2F [3:0];
Address 0x30 [7:0]; LMG[11:0] Luma Manual Gain,
Address 0x2F [3:0]; Address 0x30 [7:0]
Luma gain [11:0] is a dual-function register. If written to, a
desired manual luma gain can be programmed. This gain
becomes active if the LAGC[2:0] mode is switched to manual
fixed gain. Equation 1 shows how to calculate a desired gain.
If read back, this register returns the current gain value.
Depending on the setting in the LAGC[2:0] bits, this is one of
the following values:
Luma manual gain value (LAGC[2:0] set to luma manual
gain mode)
Luma automatic gain value (LAGC[2:0] set to any of the
automatic modes)
Table 34. LG/LMG Function
LG[11:0]/LMG[11:0]
Read/Write
LMG[11:0] = X
Write
Description
Manual gain for luma
path.
Actually used gain.
LG[11:0]
Read
(
)
2
...
0
2048
4095
0
_
=
≤
<
=
LG
Gain
Luma
(1)
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| ADV7181BBCPZ | Multiformat SDTV Video Decoder |
| ADV7181BBSTZ | Multiformat SDTV Video Decoder |
| ADV7181BCP | Multiformat SDTV Video Decoder |
| ADV7181BST | Multiformat SDTV Video Decoder |
| ADV7183B | Multiformat SDTV Video Decoder |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ADV7181BBCPZ | 制造商:Analog Devices 功能描述:Video Decoder 3ADC 9-Bit 64-Pin LFCSP EP 制造商:Rochester Electronics LLC 功能描述:ADV718XB DECODER FAMILY UPDATES - Bulk 制造商:Analog Devices 功能描述:IC VIDEO ENCODER |
| ADV7181BBSTZ | 制造商:Analog Devices 功能描述:Video Decoder 3ADC 9-Bit 64-Pin LQFP 制造商:Analog Devices 功能描述:IC VIDEO ENCODER |
| ADV7181BCP | 制造商:Analog Devices 功能描述:Video Decoder 3ADC 9-Bit 64-Pin LFCSP EP 制造商:Rochester Electronics LLC 功能描述:10BIT NTSC/PAL/SECAM VIDEO DECODER I.C. - Bulk |
| ADV7181BCPZ | 制造商:Analog Devices 功能描述: |
| ADV7181BST | 制造商:Analog Devices 功能描述:Video Decoder 3ADC 9-Bit 64-Pin LQFP 制造商:Rochester Electronics LLC 功能描述:9-BIT BIT NTSC/PAL/SECAM VIDEO DECODER - Bulk 制造商:Analog Devices 功能描述:IC VIDEO ENCODER |
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