參數(shù)資料
型號(hào)： ADV7310
廠商： Analog Devices, Inc.
英文描述： Multiformat 216 MHz Video Encoder with Six NSV 12-Bit DACs
中文描述： 多格式視頻編碼器216兆赫六噪聲整形的12位DAC
文件頁(yè)數(shù)： 40/84頁(yè)
文件大小： 1099K
代理商： ADV7310
REV. A
–40–
ADV7310/ADV7311
SD Internal Filter Response
[Subaddress 40h; Subaddress 42, 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 attenuation, a CIF response,
and a QCIF response. The UV filter supports several different
frequency responses including six low-pass responses, a CIF
response, and a QCIF response, as can be seen in the figures on
the following pages.
If SD SSAF gain is enabled, there is the option of 12 responses
in the range from –4 dB to +4 dB [Subaddress 47, Bit 4]. The
desired response can be chosen by the user by programming the
correct value via the I
2
C [Subaddress 62h]. The variation of fre-
quency responses can be seen in the figures on the following pages.
In addition to the chroma filters listed in Table VII, the
ADV7310/ADV7311 contains an SSAF filter specifically designed
for and applicable to the color difference component outputs,
U and V. This filter has a cutoff frequency of about 2.7 MHz
and –40 dB at 3.8 MHz, as can be seen in Figure 38. This filter
can be controlled with Address 42h, Bit 0.
If this filter is disabled, the selectable chroma filters shown in
Table VII can be used for the CVBS or Luma/Chroma signal.
Table VII. Internal Filter Specifications
Pass-Band
Ripple
1
(dB)
3 dB
Bandwidth
2
(MHz)
Filter
Luma LPF NTSC
Luma LPF PAL
Luma Notch NTSC
Luma Notch PAL
Luma SSAF
Luma CIF
Luma QCIF
Chroma 0.65 MHz
Chroma 1.0 MHz
Chroma 1.3 MHz
Chroma 2.0 MHz
Chroma 3.0 MHz
Chroma CIF
Chroma QCIF
0.16
0.1
0.09
0.1
0.04
0.127
Monotonic
Monotonic
Monotonic
0.09
0.048
Monotonic
Monotonic
Monotonic
4.24
4.81
2.3/4.9/6.6
3.1/5.6/6.4
6.45
3.02
1.5
0.65
1
1.395
2.2
3.2
0.65
0.5
NOTES
1
Pass-band ripple is the maximum fluctuation from the 0 dB response in the
pass band, measured in dB. The pass band is defined to have 0 Hz to fc (Hz)
frequency limits for a low-pass filter, 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
–10
–30
–50
–60
–20
–40
6
5
4
3
2
1
0
EXTENDED UV FILTER MODE
Figure 38. UV SSAF Filter
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