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參數(shù)資料
| 型號： | ADV7194 |
| 廠商： | Analog Devices, Inc. |
| 英文描述： | Professional Extended-10⑩ Video Encoder with 54 MHz Oversampling |
| 中文描述： | 專業(yè)擴展- 10⑩視頻編碼器，54兆赫采樣 |
| 文件頁數(shù)： | 42/69頁 |
| 文件大?。?/td> | 647K |
| 代理商： | ADV7194 |
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ADV7194
–42–
REV. 0
DNR17
DNR16
DNR15
DNR14
DNR13
DNR12
DNR11
DNR10
DNR THRESHOLD
DNR DNR DNR DNR DNR DNR
15 14 13 12 11 10
0 0
0
0
0
0
1
1
1
1
1
1
0
0
1
1
0
0
1
1
0
1
0
1
0
1
62
63
0
1
2 PIXELS
4 PIXELS
DNR16
BORDER AREA
0
1
8 PIXELS
16 PIXELS
DNR17
BLOCK SIZE
CONTROL
Figure 86. DNR Register 1
DNR2 BIT DESCRIPTION
DNR Input Select (DNR20–DNR22)
Three bits are assigned to select the
fi
lter which is applied to the
incoming Y data. The signal which lies in the passband of the
selected
fi
lter is the signal which will be DNR processed. Figure 87
shows the
fi
lter responses selectable with this control.
DNR Mode Control (DNR23)
This bit controls the DNR mode selected. A Logic 0 selects
DNR mode, a Logic 1 selects DNR Sharpness mode.
DNR works on the principle of de
fi
ning low amplitude, high-
frequency signals as probable noise and subtracting this noise
from the original signal.
In DNR mode, it is possible to subtract a fraction of the signal
which lies below the set threshold, assumed to be noise, from
the original signal. The threshold is set in DNR Register 1.
When DNR Sharpness mode is enabled it is possible to add a
fraction of the signal which lies above the set threshold to the
original signal, since this data is assumed to be valid data and
not noise. The overall effect being that the signal will be boosted
(similar to using Extended SSAF Filter).
FREQUENCY
–
MHz
1
0.4
0.6
0.2
0
1
M
–
2
3
4
6
5
0.8
0
FILTER D
FILTER C
FILTER B
FILTER A
Figure 87. Filter Response of Filters Selectable
FILTER OUTPUT
< THRESHOLD
GAIN CONTROL
BLOCK SIZE CONTROL
BORDER AREA
BLOCK OFFSET
GAIN
CORING GAIN DATA
CORING GAIN BORDER
FILTER BLOCK
FILTER OUTPUT
> THRESHOLD
DNR
OUT
MAIN SIGNAL PATH
Y DATA
INPUT
NOISE SIGNAL PATH
SUBTRACT
SIGNAL IN
THRESHOLD
RANGE
FROM
ORIGINAL
SIGNAL
DNR
MODE
FILTER OUTPUT
> THRESHOLD
GAIN CONTROL
BLOCK SIZE CONTROL
BORDER AREA
BLOCK OFFSET
GAIN
CORING GAIN DATA
CORING GAIN BORDER
FILTER BLOCK
FILTER OUTPUT
< THRESHOLD
DNR
OUT
MAIN SIGNAL PATH
Y DATA
INPUT
NOISE SIGNAL PATH
ADD
SIGNAL
ABOVE
THRESHOLD
RANGE
TO
ORIGINAL
SIGNAL
DNR
SHARPNESS
MODE
Figure 88. Block Diagram for DNR Mode and DNR Sharp-
ness Mode
Block Offset (DNR24–DNR27)
Four bits are assigned to this control which allows a shift of the
data block of 15 pixels maximum. Consider the coring gain
positions
fi
xed. The block offset shifts the data in steps of one
pixel such that the border coring gain factors can be applied at the
same position regardless of variations in input timing of the data.
OXXXXXXO OXXXXXXO
APPLY BORDER
CORING GAIN
DNR27-DNR24
= 01HEX
OFFSET CAUSED BY
VARIATIONS IN INPUT
TIMING
OXXXXXXO OXXXXXXO
OXXXXXXO OXXXXXXO
APPLY DATA
CORING GAIN
Figure 89.
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| ADV7194KST | 制造商:Analog Devices 功能描述:Video Encoder 6DAC 10-Bit 80-Pin LQFP 制造商:Rochester Electronics LLC 功能描述:PROFESSIONAL/HDTV NTSC/PAL ENCODER I.C. - Bulk 制造商:Analog Devices 功能描述:IC VIDEO ENCODER |
| ADV7194KSTZ | 功能描述:IC ENCODER VIDEO EXT-10 80-LQFP RoHS:是 類別:集成電路 (IC) >> 接口 - 編碼器，解碼器，轉換器 系列:- 產品變化通告:Development Systems Discontinuation 26/Apr/2011 標準包裝:1 系列:- 類型:編碼器 應用: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 供應商設備封裝:模塊 包裝:散裝 其它名稱:Q4645799 |
| ADV7194KSTZ | 制造商:Analog Devices 功能描述:TV / Video IC |
| ADV7195 | 制造商:AD 制造商全稱:Analog Devices 功能描述:Multiformat Progressive Scan/HDTV Encoder with Three 11-Bit DACs and 10-Bit Data Input |
| ADV7195KS | 制造商:Analog Devices 功能描述:Video Encoder 3DAC 11-Bit 52-Pin MQFP 制造商:Rochester Electronics LLC 功能描述:MULTI-FORMAT VID+PROGSCAN/HDTV ENCODERIC - Bulk |
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