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| 型號： | ADV7188 |
| 廠商： | Analog Devices, Inc. |
| 英文描述： | Multiformat SDTV Video Decoder with Fast Switch Overlay Support |
| 中文描述： | 標(biāo)清多格式視頻解碼器支持快速開關(guān)重疊 |
| 文件頁數(shù)： | 29/112頁 |
| 文件大?。?/td> | 943K |
| 代理商： | ADV7188 |
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ADV7188
For nonstandard video signals, the frequency relationship may
be disturbed and the comb filters may not be able to remove all
crosstalk artifacts in an optimum fashion without the assistance
of the shaping filter block.
Rev. 0 | Page 29 of 112
An automatic mode is provided. Here, the ADV7188 evaluates
the quality of the incoming video signal and selects the filter
responses in accordance with the signal quality and video
standard. YFSM, WYSFMOVR, and WYSFM allow the user to
manually override the automatic decisions in part or in full.
The luma shaping filter has three control registers
YSFM[4:0] allows the user to manually select a shaping
filter mode (applied to all video signals) or to enable an
automatic selection (dependent on video quality and video
standard).
WYSFMOVR allows the user to manually override the
WYSFM decision.
WYSFM[4:0] allows the user to select a different shaping
filter mode for good quality CVBS, component (YPrPb),
and S-VHS (YC) input signals.
In automatic mode, the system preserves the maximum possible
bandwidth for good CVBS sources (since they can successfully
be combed) and for luma components of YPrPb and YC
sources, since they need not be combed. For poor quality signals,
the system selects from a set of proprietary shaping filter
responses that complements comb filter operation in order to
reduce visual artifacts. The decisions of the control logic are
shown in Figure 15.
YSFM[4:0] Y Shaping Filter Mode, Address 0x17 [4:0]
The Y-shaping filter mode bits allow the user to select from a
wide range of low-pass and notch filters. When switched in
automatic mode, the filter is selected based on other register
selections, such as detected video standard, and properties
extracted from the incoming video itself, such as quality and time
base stability. The automatic selection always picks the widest
possible bandwidth for the video input encountered.
If the YSFM settings specify a filter (that is, YSFM is set to
values other than 00000 or 00001), the chosen filter is
applied to all video, regardless of its quality.
In automatic selection mode, the notch filters are used
only for bad quality video signals. For all other video signals,
wideband filters are used; see Table 36.
WYSFMOVR Wideband Y Shaping Filter Override,
Address 0x18,[7]
Setting the WYSFMOVR bit enables the use of the WYSFM[4:0]
settings for good quality video signals. For more information,
refer to the general discussion of the luma shaping filters in the
Y-Shaping Filter section and the flowchart shown in Figure 15.
0—The shaping filter for good quality video signals is selected
automatically.
1 (default)—Enables manual override via WYSFM[4:0].
Table 36. YSFM Function
YSFM[4:0]
Description
00000
Automatic selection including a wide notch
response (PAL/NTSC/SECAM)
00001
(default)
response (PAL/NTSC/SECAM)
00010
SVHS 1
00011
SVHS 2
00100
SVHS 3
00101
SVHS 4
00110
SVHS 5
00111
SVHS 6
01000
SVHS 7
01001
SVHS 8
01010
SVHS 9
01011
SVHS 10
01100
SVHS 11
01101
SVHS 12
01110
SVHS 13
01111
SVHS 14
10000
SVHS 15
10001
SVHS 16
10010
SVHS 17
10011
SVHS 18 (CCIR 601)
10100
PAL NN 1
10101
PAL NN 2
10110
PAL NN 3
10111
PAL WN 1
11000
PAL WN 2
11001
NTSC NN 1
11010
NTSC NN 2
11011
NTSC NN 3
11100
NTSC WN 1
11101
NTSC WN 2
11110
NTSC WN 3
11111
Reserved
Automatic selection including a narrow notch
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| ADV7189B | Multiformat SDTV Video Decoder |
| ADV7189BBSTZ268H | Multiformat SDTV Video Decoder |
| ADV7189BKSTZ10F | Multiformat SDTV Video Decoder |
| ADV7189 | Multiformat SDTV Video Decoder |
| ADV7189KST | Multiformat SDTV Video Decoder |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ADV7188BSTZ | 功能描述:IC DECODER VID MULTIFORM 80LQFP RoHS:是 類別:集成電路 (IC) >> 接口 - 編碼器，解碼器，轉(zhuǎn)換器 系列:- 產(chǎn)品變化通告:Development Systems Discontinuation 26/Apr/2011 標(biāo)準(zhǔn)包裝:1 系列:- 類型:編碼器 應(yīng)用:DVB-S.2 系統(tǒng) 電壓 - 電源，模擬:- 電壓 - 電源，數(shù)字:- 安裝類型:- 封裝/外殼:模塊 供應(yīng)商設(shè)備封裝:模塊 包裝:散裝 其它名稱:Q4645799 |
| ADV7189 | 制造商:AD 制造商全稱:Analog Devices 功能描述:Multiformat SDTV Video Decoder |
| ADV7189B | 制造商:AD 制造商全稱:Analog Devices 功能描述:Multiformat SDTV Video Decoder |
| ADV7189BBSTZ | 功能描述:IC VIDEO DECODER SDTV 80-LQFP RoHS:是 類別:集成電路 (IC) >> 接口 - 編碼器，解碼器，轉(zhuǎn)換器 系列:- 產(chǎn)品變化通告:Development Systems Discontinuation 26/Apr/2011 標(biāo)準(zhǔn)包裝:1 系列:- 類型:編碼器 應(yīng)用:DVB-S.2 系統(tǒng) 電壓 - 電源，模擬:- 電壓 - 電源，數(shù)字:- 安裝類型:- 封裝/外殼:模塊 供應(yīng)商設(shè)備封裝:模塊 包裝:散裝 其它名稱:Q4645799 |
| ADV7189BBSTZ268H | 制造商:AD 制造商全稱:Analog Devices 功能描述:Multiformat SDTV Video Decoder |
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