參數(shù)資料
型號： EVAL-ADV739XFEZ
廠商： Analog Devices Inc
文件頁數(shù)： 59/108頁
文件大小： 0K
描述： BOARD EVAL FOR ADV739XFEZ
標準包裝： 1
系列： Advantiv®
主要目的： 視頻，視頻處理
嵌入式： 否
已用 IC / 零件： ADV7403
主要屬性： NTSC/PAL 數(shù)字視頻解碼器
次要屬性： 前端板，用于 ADV7390、ADV7391、ADV7392 和 ADV7393 編碼器背端板
已供物品： 板
ADV7390/ADV7391/ADV7392/ADV7393
Data Sheet
Rev. G | Page 54 of 108
FILTERS
Table 42 shows an overview of the programmable filters available
on the ADV739x.
Table 42. Selectable Filters
Filter
Subaddress
SD Luma LPF NTSC
0x80
SD Luma LPF PAL
0x80
SD Luma Notch NTSC
0x80
SD Luma Notch PAL
0x80
SD Luma SSAF
0x80
SD Luma CIF
0x80
SD Luma QCIF
0x80
SD Chroma 0.65 MHz
0x80
SD Chroma 1.0 MHz
0x80
SD Chroma 1.3 MHz
0x80
SD Chroma 2.0 MHz
0x80
SD Chroma 3.0 MHz
0x80
SD Chroma CIF
0x80
SD Chroma QCIF
0x80
SD PrPb SSAF
0x82
ED/HD Sinc Compensation Filter
0x33
ED/HD Chroma SSAF
0x33
SD Internal Filter Response
Subaddress 0x80, Bits[7:2]; Subaddress 0x82, Bit 0
The Y filter supports several different frequency responses,
including two low-pass responses, two notch responses, an
extended (SSAF) response with or without gain boost atten-
uation, a CIF response, and a QCIF response. The PrPb filter
supports several different frequency responses, including six
low-pass responses, a CIF response, and a QCIF response, as
If SD Luma SSAF gain is enabled (Subaddress 0x87, Bit 4), there
are 13 response options in the range 4 dB to +4 dB. The desired
response can be programmed using Subaddress 0xA2. Variation
in frequency responses is shown in Figure 35 to Figure 37.
In addition to the chroma filters listed in Table 42, the ADV739x
contains an SSAF filter that is specifically designed for the color
difference component outputs, Pr and Pb. This filter has a cutoff
frequency of ~2.7 MHz and a gain of –40 dB at 3.8 MHz (see
Figure 66). This filter can be controlled with Bit 0 of Sub-
address 0x82, Bit 0.
Figure 66. PrPb SSAF Filter
If this filter is disabled, one of the chroma filters shown in
Table 43 can be selected and used for the CVBS or luma/
chroma signal.
Table 43. Internal Filter Specifications
Filter
Pass-Band
Ripple (dB)1
3 dB Bandwidth (MHz)2
Luma LPF NTSC
0.16
4.24
Luma LPF PAL
0.1
4.81
Luma Notch NTSC
0.09
2.3/4.9/6.6
Luma Notch PAL
0.1
3.1/5.6/6.4
Luma SSAF
0.04
6.45
Luma CIF
0.127
3.02
Luma QCIF
Monotonic
1.5
Chroma 0.65 MHz
Monotonic
0.65
Chroma 1.0 MHz
Monotonic
1
Chroma 1.3 MHz
0.09
1.395
Chroma 2.0 MHz
0.048
2.2
Chroma 3.0 MHz
Monotonic
3.2
Chroma CIF
Monotonic
0.65
Chroma QCIF
Monotonic
0.5
1
Pass-band ripple is the maximum fluctuation from the 0 dB response in the
pass band, measured in decibels. The pass band is defined to have 0 Hz to fc
(Hz) frequency limits for a low-pass filter and 0 Hz to f1 (Hz) and f2 (Hz) to
infinity for a notch filter, where fc, f1, and f2 are the 3 dB points.
2
3 dB bandwidth refers to the 3 dB cutoff frequency.
FREQUENCY (MHz)
0
G
AI
N
(
d
B)
–10
–30
–50
–60
–20
–40
6
5
4
3
2
1
0
EXTENDED (SSAF) PrPb FILTER MODE
06234-
067
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