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參數資料
| 型號： | ADV7343 |
| 廠商： | Analog Devices, Inc. |
| 英文描述： | Multiformat Video Encoder Six, 11-Bit, 297 MHz DACs |
| 中文描述： | 六多格式視頻編碼器，11位，297兆赫數模轉換器 |
| 文件頁數： | 58/88頁 |
| 文件大?。?/td> | 1053K |
| 代理商： | ADV7343 |
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ADV7342/ADV7343
ED/HD SHARPNESS FILTER AND ADAPTIVE FILTER
CONTROLS
Subaddress 0x40, Subaddress 0x58 to Subaddress 0x5D
There are three filter modes available on the ADV7342/ADV7343:
a sharpness filter mode and two adaptive filter modes.
ED/HD Sharpness Filter Mode
To enhance or attenuate the Y signal in the frequency ranges
shown in Figure 72, the ED/HD sharpness filter must be
enabled (Subaddress 0x31, Bit 7) and the ED/HD adaptive filter
must be disabled (Subaddress 0x35, Bit 7).
To select one of the 256 individual responses, the corresponding
gain values, which range from –8 to +7 for each filter, must be
programmed into the ED/HD sharpness filter gain register at
Subaddress 0x40.
ED/HD Adaptive Filter Mode
The ED/HD Adaptive Filter Threshold A, B, and C registers, the
ED/HD Adaptive Filter Gain 1, 2, and 3 registers, and the
ED/HD sharpness filter gain register are used in adaptive filter
mode. To activate the adaptive filter control, the ED/HD
sharpness filter and the ED/HD adaptive filter must be enabled
(Subaddress 0x31, Bit 7, and Subaddress 0x35, Bit 7, respectively).
Rev. 0 | Page 58 of 88
The derivative of the incoming signal is compared to the three
programmable threshold values: ED/HD Adaptive Filter
Threshold A, B, and C (Subaddress 0x5B, Subaddress 0x5C,
and Subaddress 0x5D, respectively). The recommended
threshold range is 16 to 235, although any value in the range of
0 to 255 can be used.
The edges can then be attenuated with the settings in the
ED/HD Adaptive Filter Gain 1, 2, and 3 registers (Subaddress
0x58, Subaddress 0x59, and Subaddress 0x5A, respectively), and
the ED/HD sharpness filter gain register (Subaddress 0x40).
There are two adaptive filter modes available. The mode
is selected using the ED/HD adaptive filter mode control
(Subaddress 0x35, Bit 6):
Mode A is used when the ED/HD adaptive filter mode
control is set to 0. In this case, Filter B (LPF) is used in the
adaptive filter block. In addition, only the programmed
values for Gain B in the ED/HD sharpness filter gain
register and ED/HD Adaptive Filter Gain 1, 2, and 3
registers are applied when needed. The Gain A values are
fixed and cannot be changed.
Mode B is used when ED/HD adaptive filter mode control
is set to 1. In this mode, a cascade of Filter A and Filter B is
used. Both settings for Gain A and Gain B in the ED/HD
sharpness filter gain register and ED/HD Adaptive Filter
Gain 1, 2, and 3 registers become active when needed.
FREQUENCY (MHz)
FILTER A RESPONSE (Gain Ka)
M
0.5
0.6
0.7
0.8
0.9
1.0
1.1
1.2
1.3
1.4
1.5
FREQUENCY (MHz)
FILTER B RESPONSE (Gain Kb)
M
0.5
0.6
0.7
0.8
0.9
1.0
1.1
1.2
1.3
1.4
FREQUENCY (MHz)
M
1.0
1.1
1.2
1.3
1.4
1.5
1.6
10
12
INPUT
SIGNAL:
STEP
FREQUENCY RESPONSE IN SHARPNESS
FILTER MODE WITH Ka = 3AND Kb = 7
SHARPNESS AND ADAPTIVE FI1.5
0
2
4
6
8
0
Figure 72. ED/HD Sharpness and Adaptive Filter Control Block
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相關代理商/技術參數 |
參數描述 |
|---|---|
| ADV7343BSTZ | 功能描述:IC ENCODER VIDEO W/DAC 64-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 |
| ADV7343WBSTZ | 功能描述:IC ENCODER VID 12BIT DAC 64LQFP 制造商:analog devices inc. 系列:- 包裝:托盤 零件狀態(tài):在售 類型:視頻編碼器 應用:DVD，Blu-Ray 電壓 - 電源，模擬:2.6 V ~ 3.46 V 電壓 - 電源，數字:1.71 V ~ 1.89 V 安裝類型:表面貼裝 封裝/外殼:64-LQFP 供應商器件封裝:64-LQFP（10x10） 標準包裝:1 |
| ADV7343WBSTZ-RL | 功能描述:Video Encoder IC DVD, Blu-Ray 64-LQFP (10x10) 制造商:analog devices inc. 系列:- 包裝:帶卷（TR） 零件狀態(tài):有效 類型:視頻編碼器 應用:DVD，Blu-Ray 電壓 - 電源，模擬:2.6 V ~ 3.46 V 電壓 - 電源，數字:1.71 V ~ 1.89 V 安裝類型:表面貼裝 封裝/外殼:64-LQFP 供應商器件封裝:64-LQFP（10x10） 標準包裝:1,500 |
| ADV7344 | 制造商:AD 制造商全稱:Analog Devices 功能描述:Multiformat Video Encoder Six 14-Bit Noise Shaped Video DACs |
| ADV7344BSTZ | 制造商:Analog Devices 功能描述: |
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