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參數(shù)資料
| 型號(hào)： | ADV7184 |
| 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)： | 36/108頁 |
| 文件大?。?/td> | 925K |
| 代理商： | ADV7184 |
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ADV7184
The default value for DNR_TH[7:0] is 0x08, indicating the
threshold for maximum luma edges to be interpreted as noise.
Rev. 0 | Page 36 of 108
PEAKING_GAIN[7:0], Luma Peaking Gain, Address 0xFB [7:0]
This filter can be manually enabled. The user can boost or
attenuate the midregion of the Y spectrum around 3 MHz. The
peaking filter can visually improve the picture by showing more
definition on the picture details that contain frequency
components around 3 MHz. The default value (0x40) in this
register passes through the luma data unaltered (0 dB response).
A lower value attenuates the signal and a higher value amplifies
it. A plot of the filters responses is shown in Figure 24.
15
–20
0
7
0
FREQUENCY (MHz)
F
10
5
0
–5
–10
–15
1
2
3
4
5
6
PEAKING GAIN USING BP FILTER
Figure 24. Peaking Filter Responses
DNR_TH2[7:0] DNR Noise Threshold 2, Address 0xFC [7:0]
The DNR2 block is positioned after the luma peaking block, so
it affects the amplified luma signal. It operates in the same way
as the DNR1 block but has an independent threshold control,
DNR_TH2[7:0]. This value is an unsigned 8-bit number, which
determines the maximum edge that is still interpreted as noise
and, therefore, blanked from the luma data.
Programming a large value into DNR_TH2[7:0] causes the
DNR block to interpret even large transients as noise and
remove them. As a result, the effect on the video data is more
visible. Programming a small value causes only small transients
to be seen as noise and removed.
COMB FILTERS
The comb filters of the ADV7184 have been greatly improved to
automatically handle video of all types, standards, and levels of
quality. The NTSC and PAL configuration registers allow the
user to customize comb filter operation, depending on which
video standard is detected (by autodetection) or selected (by
manual programming). In addition to the bits listed in this
section, there are some other ADI internal controls; contact
ADI for more information.
NTSC Comb Filter Settings
Used for NTSC-M/J CVBS inputs.
NSFSEL[1:0] Split Filter Selection NTSC, Address 0x19 [3:2]
NSFSEL[1:0] selects how much of the overall signal bandwidth
is fed to the combs. A narrow bandwidth split filter gives better
performance on diagonal lines, but leaves more dot crawl in the
final output image. The opposite is true for a wide bandwidth
split filter.
Table 50.NSFSEL Function
NSFSEL[1:0]
00 (default)
01
10
11
CTAPSN[1:0] Chroma Comb Taps NTSC, Address 0x38 [7:6]
Table 51. CTAPSN Function
CTAPSN[1:0]
Description
00
Do not use
01
NTSC chroma comb adapts 3 lines (3 taps) to
2 lines (2 taps)
10 (default)
NTSC chroma comb adapts 5 lines (5 taps) to 3
lines (3 taps)
11
NTSC chroma comb adapts 5 lines (5 taps) to 4
lines (4 taps)
CCMN[2:0] Chroma Comb Mode NTSC, Address 0x38 [5:3]
See Table 52.
Description
Narrow
Medium
Medium
Wide
YCMN[2:0] Luma Comb Mode NTSC, Address 0x38 [2:0]
See Table 53.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ADV7184BSTZ | 功能描述:IC DECODER VID SDTV MULTI 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 |
| ADV7185 | 制造商:AD 制造商全稱:Analog Devices 功能描述:Professional NTSC/PAL Video Decoder with 10-Bit CCIR656 Output |
| ADV7185KST | 制造商:AD 制造商全稱:Analog Devices 功能描述:Professional NTSC/PAL Video Decoder with 10-Bit CCIR656 Output |
| ADV7186 | 制造商:AD 制造商全稱:Analog Devices 功能描述:Video Decoder and Display Processor |
| 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(dòng)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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