參數(shù)資料
型號： TMC22191
廠商： Fairchild Semiconductor Corporation
英文描述： Digital Video Encoders(數(shù)字視頻編碼器)
中文描述： 數(shù)字視頻編碼器（數(shù)字視頻編碼器）
文件頁數(shù)： 45/60頁
文件大小： 293K
代理商： TMC22191
PRODUCT SPECIFICATION
TMC22091/TMC22191
45
Filtering
The TMC22x91 incorporates internal digital filters to estab-
lish appropriate bandwidths and simplify external analog fil-
ter designs.
Color-Difference Low-Pass Filters
The color-difference low-pass filters in the TMC22x91
establish chrominance bandwidths which meet the specifica-
tions outlined in CCIR Report 624-3, Table II, Item 2.6, for
system I over a range of pixel rates from 12.27 Mpps to
14.75 Mpps. Equal bandwidth is established for both color-
difference channels.
Figure 26. Color-Difference Low-Pass Filter Response
Interpolation Filters
The Chroma Modulator output and the luminance data path
are digitally filtered with sharp-cutoff low-pass interpolation
filters. These filters ensure that aliased subcarrier, chromi-
nance, and luminance frequencies are sufficiently suppressed
in the frequency band above base-band video and below the
pixel frequency (f
S
/4 to 3f
S
/4, where f
S
is the PXCK
frequency).
0
0
-10
-20
-30
A
Frequency (MHz)
-40
-50
-60
-70
-80
-90
1
2
3
4
5
6
7
8
24363A
f = 14.27 Mpps
CCIR Rep 624 Specification
C
f = 12.27 Mpps
Since these are fixed-coefficient digital filters, their filter
characteristics depend upon clock rate. Figures 26 and 27
show the frequency response for two pixel rates, 12.27 MHz
and 14.75 MHz.
Figure 27. Chroma Modulator and Luminance
Interpolation Filter Full Spectrum Response
Figure 28. Chroma Modulator and Luminance
Interpolation Filter Passband Detail
All digital-to-analog reconstruction systems exhibit a high
frequency roll-off as a result of the zero-order hold charac-
teristic of D/A converters. This response is commonly
referred to as a sin(x)/x response. It is a function of the sam-
pling rate of the output D/A.
0
0
-10
-20
-30
-40
-50
-60
-70
-80
-90
A
Frequency (MHz)
3
6
9
12
15
24394A
f = 14.75 Mpps
f = 12.27 Mpps
0
0
-1
-2
-3
A
Frequency (MHz)
-4
1
2
3
4
5
6
24365A
7
f = 14.75 Mpps
f = 12.27 Mpps
Figure 25. Frequency/Phase Data Transfer
4
PXCK
PIXEL
PIXEL
PIXEL
24383A
FREQUENCY
PHASE
FIELD IDENTIFICATION
0
1
2
3
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
PIXEL
PIXEL
FID f
23:20
f
19:16
f
15:12
f
11:8
f
7:4
f
3:0
φ
23:20
φ
19:16
φ
15:12
φ
11:8
φ
7:4
φ
3:0
GHSYNC
CVBS7-0
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
TMC22191KHC 功能描述:視頻 IC D/V Encoder Layering Engine RoHS:否 制造商:Fairchild Semiconductor 工作電源電壓:5 V 電源電流:80 mA 最大工作溫度:+ 85 C 封裝 / 箱體:TSSOP-28 封裝:Reel
TMC22191R0C 功能描述:視頻 IC D/V Encoder Layering Engine RoHS:否 制造商:Fairchild Semiconductor 工作電源電壓:5 V 電源電流:80 mA 最大工作溫度:+ 85 C 封裝 / 箱體:TSSOP-28 封裝:Reel
TMC22191R0CT 功能描述:視頻 IC D/V Encoder Layering Engine RoHS:否 制造商:Fairchild Semiconductor 工作電源電壓:5 V 電源電流:80 mA 最大工作溫度:+ 85 C 封裝 / 箱體:TSSOP-28 封裝:Reel
TMC222 制造商:Trinamic 功能描述:IC SM WITH I2C INTERFACE
TMC2220G8A 制造商:Fairchild Semiconductor Corporation 功能描述:
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