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參數(shù)資料
| 型號： | ADV7184BSTZ |
| 廠商： | Analog Devices Inc |
| 文件頁數(shù)： | 45/112頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC DECODER VID SDTV MULTI 80LQFP |
| 標(biāo)準(zhǔn)包裝： | 1 |
| 類型： | 視頻解碼器 |
| 應(yīng)用： | 投影儀，錄音機(jī)，安全 |
| 電壓 - 電源，模擬： | 3.15 V ~ 3.45 V |
| 電壓 - 電源，數(shù)字： | 1.65 V ~ 2 V |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 80-LQFP |
| 供應(yīng)商設(shè)備封裝： | 80-LQFP（14x14） |
| 包裝： | 托盤 |
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ADV7184
Rev. A | Page 38 of 112
Chroma Gain
CAGC [1:0], Chroma Automatic Gain Control,
Address 0x2C [1:0]
These two bits select the basic mode of operation for automatic
gain control in the chroma path.
Table 45. CAGC [1:0] Function
CAGC [1:0]
Description
00
Manual fixed gain (use CMG [11:0])
01
Use luma gain for chroma
10 (default)
Automatic gain (based on color burst)
11
Freeze chroma gain
CAGT [1:0], Chroma Automatic Gain Timing,
Address 0x2D [7:6]
These bits allow the user to influence the tracking speed of the
chroma automatic gain control, but have an effect only if the
CAGC [1:0] bits are set to 10 (automatic gain).
Table 46. CAGT [1:0] Function
CAGT [1:0]
Description
00
Slow (TC = 2 sec)
01
Medium (TC = 1 sec)
10
Fast (TC = 0.2 sec)
11 (default)
Adaptive
CMG [11:0]/CG [11:0], Chroma Manual Gain/Chroma Gain,
Address 0x2D [3:0], Address 0x2E [7:0]
CMG [11:0] are dual-function bits. If these bits are written to, a
desired manual chroma gain can be programmed. This gain
becomes active if the CAGC [1:0] mode is switched to manual
fixed gain. Refer to Equation 4 to calculate a desired gain. If
read back, these bits return the current gain value. Depending on
the setting in the CAGC [1:0] bits, this is either
Chroma manual gain value (CAGC [1:0] set to chroma
manual gain mode)
Chroma automatic gain value (CAGC [1:0] set to any of
the automatic modes)
Table 47. CG [11:0]/CMG [11:0] Function
CG [11:0]/CMG [11:0]
Read/Write
Description
CMG [11:0]
Write
Manual gain for
chroma path
CG [11:0]
Read
Currently active gain
()
4
...
0
1024
4095
0
_
=
≤
<
=
CG
Gain
Chroma
(4)
For example, freezing the automatic gain loop results in a
readback value of 0x47A for the CMG [11:0] bits.
1.
Convert the readback value to decimal:
0x47A = 1146d
2.
Apply Equation 4 to convert the readback value:
1146/1024 = 1.12
CKE, Color-Kill Enable, Address 0x2B [6]
This bit allows the optional color-kill function to be switched
on or off. For QAM-based video standards (PAL and NTSC)
and FM-based systems (SECAM), the threshold for the color-
kill decision is selectable via the CKILLTHR [2:0] bits
(Address 0x3D).
If color kill is enabled and the color carrier of the incoming
video signal is less than the threshold for 128 consecutive video
lines, color processing is switched off (black and white output).
To switch the color processing back on, another 128 consecutive
lines with a color burst greater than the threshold are required.
The color-kill option only works for input signals with a modu-
lated chroma part. For component (YPrPb) input, there is no
color kill.
0—Disables color kill.
1 (default)—Enables color kill.
CKILLTHR [2:0], Color-Kill Threshold, Address 0x3D [6:4]
The CKILLTHR [2:0] bits allow the user to select a threshold for
the color-kill function. The threshold applies only to QAM-
based (NTSC and PAL) or FM-modulated (SECAM) video
standards.
To enable the color-kill function, the CKE bit must be set. For
CKILLTHR settings 000, 001, 010, and 011, chroma demodulation
inside the ADV7184 may not work satisfactorily for poor input
video signals.
Table 48. CKILLTHR [2:0] Function
Description
CKILLTHR [2:0]
SECAM
NTSC, PAL
000
No color kill
Kill at <0.5%
001
Kill at <5%
Kill at <1.5%
010
Kill at <7%
Kill at <2.5%
011
Kill at <8%
Kill at <4.0%
100 (default)
Kill at <9.5%
Kill at <8.5%
101
Kill at <15%
Kill at <16.0%
110
Kill at <32%
Kill at <32.0%.
111
Reserved for Analog Devices internal use only;
do not select
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| ADV7186BBCZ | 功能描述:IC VIDEO DECODER 196CSPBGA RoHS:是 類別:集成電路 (IC) >> 線性 - 視頻處理 系列:- 產(chǎn)品變化通告:Product Discontinuation 07/Mar/2011 標(biāo)準(zhǔn)包裝:3,000 系列:OMNITUNE™ 類型:調(diào)諧器 應(yīng)用:移動電話，手機(jī)，視頻顯示器 安裝類型:表面貼裝 封裝/外殼:65-WFBGA 供應(yīng)商設(shè)備封裝:PG-WFSGA-65 包裝:帶卷 (TR) 其它名稱:SP000365064 |
| ADV7186BBCZ-RL | 功能描述:IC VIDEO DECODER 196CSPBGA RoHS:是 類別:集成電路 (IC) >> 線性 - 視頻處理 系列:- 產(chǎn)品變化通告:Product Discontinuation 07/Mar/2011 標(biāo)準(zhǔn)包裝:3,000 系列:OMNITUNE™ 類型:調(diào)諧器 應(yīng)用:移動電話，手機(jī)，視頻顯示器 安裝類型:表面貼裝 封裝/外殼:65-WFBGA 供應(yīng)商設(shè)備封裝:PG-WFSGA-65 包裝:帶卷 (TR) 其它名稱:SP000365064 |
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