參數(shù)資料
型號(hào)： ADV7183ABST
廠商： ANALOG DEVICES INC
元件分類(lèi)： 顏色信號(hào)轉(zhuǎn)換
英文描述： Multiformat SDTV Video Decoder
中文描述： COLOR SIGNAL DECODER, PQFP80
封裝： LEAD FREE, MS-026-BEC, LQFP-80
文件頁(yè)數(shù)： 31/104頁(yè)
文件大?。?/td> 894K
代理商： ADV7183ABST
ADV7183A
Rev. A | Page 31 of 104
0
–20
–40
–60
–80
–100
–120
0
10
8
6
4
2
12
0
FREQUENCY (MHz)
A
v740a COMBINED Y ANTY RESAMPLE
Figure 13. SDP Y S-VHS 18 Extra Wideband Filter (CCIR 601 Compliant)
0
–10
–20
–30
–40
–50
–60
–70
0
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6
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FREQUENCY (MHz)
v740a COMBINED Y Y RESAMPLE
A
Figure 14. SDP Y S-VHS 18 Extra Wideband Filter (CCIR 601 Compliant)
0
–10
–20
–30
–40
–50
–60
–70
0
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8
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FREQUENCY (MHz)
v740a COMBINED Y Y RESAMPLE
A
Figure 15. SDP Y S-VHS 18 Extra Wideband Filter (601)
YPM[2:0] Y Peaking Filter Mode (SDP), Address 0x02, [2:0]
Allows the user to select peaking. This function allows the user
to boost/attenuate luma signals around the color subcarrier
frequency. Selecting YPM = 000,001,010,011 sharpens the
image; YPM = 101,110,111 attenuates the luma around the color
subcarrier. In cases of incomplete cancellation in the Y comb
filter, this could be used to attenuate any residual C components
(hanging dots) in the Y output at the cost of a softer image.
Table 62. YPM Function
Filter Response (Peak Position)
YPM[2:0]
Composite (2.6 MHz)
000
+4.5 dB
001
+4.5 dB
010
+4.5 dB
011
+1.25 dB
100*
0
101
–1.25 dB
110
–1.75 dB
111
–3.0 dB
*Default value.
SDP CHROMA FILTER
Data
10
from the digital fine clamp block is processed by two sets
of filters:
S-VHS (3.75 MHz)
+9.25 dB
+9.25 dB
+5.75 dB
+3.3 dB
0
–3.0 dB
–8.0 dB
–8.0 dB
Chroma Antialias Filter (CAA). The ADV7183A over-
samples the CVBS by a factor of 2 and the Chroma/PrPb
by a factor of 4. A decimating filter (CAA) is used to
preserve the active video band and remove any out-of-
band components. The CAA filter has a fixed response.
Chroma Shaping Filters (CSH). The shaping filter block
(CSH) can be programmed to perform a variety of low-
pass responses. It can be used to selectively reduce the
bandwidth of the chroma signal for scaling or
compression.
Digital Resampling Filter. This block is used to allow
dynamic resampling of the video signal to alter parameters
such as the time base of a line of video. Fundamentally, the
resampler is a set of low-pass filters. The actual response is
chosen by the system with no requirement for user
intervention.
The plots in Figure 16 show the overall response of all filters
together.
10
The data format at this point is CVBS for CVBS inputs, chroma only for Y/C,
or U/V interleaved for YPrPb input formats.
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
ADV7183AKST 制造商:Analog Devices 功能描述:MULTIFORMAT SDTV VIDEO DECODER 制造商:Rochester Electronics LLC 功能描述:10BIT NTSC/PAL/SECAMVIDDECOD I.C - Tape and Reel 制造商:Analog Devices 功能描述:IC VIDEO ENCODER
ADV7183AKST-U1 制造商:Analog Devices 功能描述:VID DECODER 80LQFP - Bulk
ADV7183AKST-X2 制造商:Analog Devices 功能描述:VID DECODER - Bulk
ADV7183AXST 制造商:Analog Devices 功能描述:VIDEO DECODER I.C. - Bulk
ADV7183AXST-X2 制造商:Analog Devices 功能描述:VIDEO DECODER I.C. - Bulk
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