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參數資料
| 型號： | ADV7180BCPZ |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | 顏色信號轉換 |
| 英文描述： | 10-Bit, 4 x Oversampling SDTV Video Decoder |
| 中文描述： | COLOR SIGNAL DECODER, QCC40 |
| 封裝： | 6 X 6 MM, ROHS COMPLIANT, MO-220VJJD-2, LFCSP-40 |
| 文件頁數： | 37/112頁 |
| 文件大小： | 1320K |
| 代理商： | ADV7180BCPZ |
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ADV7180
DIGITAL NOISE REDUCTION (DNR) AND LUMA
PEAKING FILTER
Digital noise reduction is based on the assumption that high
frequency signals with low amplitude are probably noise and
that their removal, therefore, improves picture quality. There are
two DNR blocks in the ADV7180: the DNR1 block before the
luma peaking filter and the DNR2 block after the luma peaking
filter, as shown in Figure 27.
Rev. A | Page 37 of 112
LUMA
DNR1
LUFILTER
DNR2
SILUMA
0
Figure 27. DNR and Peaking Block Diagram
DNR_EN, Digital Noise Reduction Enable,
Address 0x4D [5]
The DNR_EN bit enables the DNR block or bypasses it.
Table 45. DNR_EN Function
Setting
Description
0
Bypasses DNR (disable)
1 (Default)
Enables digital noise reduction on the luma data
DNR_TH[7:0], DNR Noise Threshold, Address 0x50 [7:0]
The DNR1 block is positioned before the luma peaking block.
The DNR_TH[7:0] value is an unsigned, 8-bit number used to
determine the maximum edge that is interpreted as noise and
therefore blanked from the luma data. Programming a large
value into DNR_TH[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 to be
removed.
Table 46. DNR_TH[7:0] Function
Setting
0x08 (Default)
Description
Threshold for maximum luma edges to be
interpreted as noise
PEAKING_GAIN[7:0], Luma Peaking Gain,
Address 0xFB [7:0]
This filter can be manually enabled. The user can select to boost
or attenuate the mid region 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 on this register
passes through the luma data unaltered. A lower value
attenuates the signal, and a higher value gains the luma signal.
A plot of the filter’s responses is shown in Figure 28.
Table 47. PEAKING_GAIN[7:0] Function
Setting
Description
0x40 (Default)
0 dB response
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 28. 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
and, therefore, affects the gained luma signal. It operates in the
same way as the DNR1 block, but there is an independent
threshold control, DNR_TH2[7:0], for this block. This value is
an unsigned, 8-bit number used to determine the maximum
edge that is 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 to be removed.
Table 48. DNR_TH2[7:0] Function
Setting
Description
0x04 (Default)
Threshold for maximum luma edges to be
interpreted as noise
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PDF描述 |
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| ADV7180BSTZ | 10-Bit, 4 x Oversampling SDTV Video Decoder |
| ADV7181 | Multiformat SDTV Video Decoder |
| ADV7181B | Multiformat SDTV Video Decoder |
| ADV7181BBCPZ | Multiformat SDTV Video Decoder |
| ADV7181BBSTZ | Multiformat SDTV Video Decoder |
相關代理商/技術參數 |
參數描述 |
|---|---|
| ADV7180BCPZ | 制造商:Analog Devices 功能描述:IC VIDEO DECODER 10BIT 57.27MSPS LFCSP40 |
| ADV7180BCPZ-REEL | 功能描述:IC VIDEO DECODER SDTV 40-LFCSP RoHS:是 類別:集成電路 (IC) >> 線性 - 視頻處理 系列:- 產品變化通告:Product Discontinuation 07/Mar/2011 標準包裝:3,000 系列:OMNITUNE™ 類型:調諧器 應用:移動電話，手機，視頻顯示器 安裝類型:表面貼裝 封裝/外殼:65-WFBGA 供應商設備封裝:PG-WFSGA-65 包裝:帶卷 (TR) 其它名稱:SP000365064 |
| ADV7180BST48Z | 功能描述:IC VID DECOD SDTV 10BIT 48LQFP RoHS:是 類別:集成電路 (IC) >> 線性 - 視頻處理 系列:- 標準包裝:250 系列:- 類型:電平移位器 應用:LCD 電視機/監控器 安裝類型:表面貼裝 封裝/外殼:28-WFQFN 裸露焊盤 供應商設備封裝:28-WQFN（4x4）裸露焊盤 包裝:帶卷 (TR) 其它名稱:296-32523-2TPS65198RUYT-ND |
| ADV7180BST48Z-RL | 功能描述:視頻 IC 48-Lead Low Profile Quad Flat Package RoHS:否 制造商:Fairchild Semiconductor 工作電源電壓:5 V 電源電流:80 mA 最大工作溫度:+ 85 C 封裝 / 箱體:TSSOP-28 封裝:Reel |
| ADV7180BSTZ | 功能描述:IC VIDEO DECODER SDTV 64-LQFP RoHS:是 類別:集成電路 (IC) >> 線性 - 視頻處理 系列:- 標準包裝:250 系列:- 類型:電平移位器 應用:LCD 電視機/監控器 安裝類型:表面貼裝 封裝/外殼:28-WFQFN 裸露焊盤 供應商設備封裝:28-WQFN（4x4）裸露焊盤 包裝:帶卷 (TR) 其它名稱:296-32523-2TPS65198RUYT-ND |
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