參數(shù)資料
型號: ADV7304A
廠商: Analog Devices, Inc.
英文描述: Multiformat SD, Progressive Scan/HDTV Video Encoder with Six NSV 14-Bit DACs
中文描述: 多格式統(tǒng)計(jì),逐行掃描/ HDTV視頻編碼器與六噪聲整形14位DAC
文件頁數(shù): 36/68頁
文件大?。?/td> 2007K
代理商: ADV7304A
REV. A
ADV7304A/ADV7305A
–36–
HD 4:2:2 to 4:4:4 Interpolation Filters and Chroma SSAF
It is recommended to input data in 4:2:2 Input Mode to make
use of the HD chroma SSAFs on the ADV7304A/ADV7305A.
This filter has a 0 dB pass-band response and prevents signal
components from being folded back into the frequency band. In
4:4:4 Input Mode, the video data is already interpolated by the
external input device and the chroma SSAFs of the ADV7304A/
ADV7305A are bypassed.
The chroma SSAF is controlled with Address 13h, Bit 5.
When the HD input format is 4:2:2, the HD Chroma Input Bit
[Address 13h, Bit 6] must be set to “1.”
2 /4 /8 Oversampling Filters
The oversampling filters are enabled in setting the PLL ON
control [Subaddress 00h, Bit 1] to “1.” If enabled, PS and
ITU-R.BT656 data is output at a rate of 108 MHz, HDTV at a
rate of 148 MHz.
FREQUENCY – MHz
0
–50
–80
0
110
10
G
20
30
40
50
60
70
80
90
100
–10
–40
–60
–70
–20
–30
Figure 33. Y – PS 4 Oversampling Filter
FREQUENCY – MHz
1.0
–1.5
–3.0
0
2
G
4
6
8
10
12
14
0.5
–1.0
–2.0
–2.5
0
–0.5
Figure 34. Y – PS 4 Oversampling Filter in the
Pass Band
FREQUENCY – MHz
0
–50
–80
0
160
20
G
40
60
80
100
120
140
–10
–40
–60
–70
–20
–30
Figure 35. Y – HDTV 2 Oversampling Filter
FREQUENCY – MHz
1.0
–1.5
–3.0
0
5
G
10
15
20
25
30
35
0.5
–1.0
–2.0
–2.5
0
–0.5
Figure 36. Y – HDTV 2 Oversampling Filter in
the Pass Band
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
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