參數(shù)資料
型號： ADV7180
廠商： Analog Devices, Inc.
英文描述： 10-Bit, 4 x Oversampling SDTV Video Decoder
中文描述： 10位，4個采樣標(biāo)清視頻解碼器
文件頁數(shù)： 29/112頁
文件大小： 1320K
代理商： ADV7180
ADV7180
An automatic mode is provided that allows the ADV7180 to
evaluate the quality of the incoming video signal and select the
filter responses in accordance with the signal quality and video
standard. YFSM, WYSFMOVR, and WYSFM allow the user to
manually override the automatic decisions in part or in full.
The luma shaping filter has three control registers:
YSFM[4:0] allows the user to manually select a shaping
filter mode (applied to all video signals) or to enable an
automatic selection (depending on video quality and video
standard).
WYSFMOVR allows the user to manually override the
WYSFM decision.
WYSFM[4:0] allows the user to select a different shaping
filter mode for good quality composite (CVBS), component
(YPrPb), and S-VHS (Y/C) input signals.
In automatic mode, the system preserves the maximum
possible bandwidth for good CVBS sources (because they can
be successfully combed) as well as for luma components of
YPrPb and Y/C sources (because they need not be combed).
For poor quality signals, the system selects from a set of
proprietary shaping filter responses that complements comb
filter operation in order to reduce visual artifacts.
The decisions of the control logic are shown in Figure 18.
Rev. A | Page 29 of 112
YSFM[4:0], Y Shaping Filter Mode, Address 0x17 [4:0]
The Y shaping filter mode bits allow the user to select from a
wide range of low-pass and notch filters. When switched in
automatic mode, the filter selection is based on other register
selections, such as detected video standard, as well as properties
extracted from the incoming video itself, such as quality and
time base stability. The automatic selection always selects the
widest possible bandwidth for the video input encountered.
If the YSFM settings specify a filter (that is, YSFM is set to
values other than 00000 or 00001), the chosen filter is
applied to all video, regardless of its quality.
In automatic selection mode, the notch filters are only used
for bad quality video signals. For all other video signals,
wideband filters are used.
WYSFMOVR, Wideband Y Shaping Filter Override,
Address 0x18 [7]
Setting the WYSFMOVR bit enables the use of the
WYSFM[4:0] settings for good quality video signals. For more
information, refer to the general discussion of the luma shaping
filters in the Y Shaping Filter section and the flowchart shown
in Figure 18.
When WYSFMOVR is 0, the shaping filter for good quality
video signals is selected automatically.
Setting WYSFMOVR to 1 (default) enables manual override via
WYSFM[4:0].
AUTO SELECT LUMA
SHAPING FILTER TO
COMPLEMENT COMB
SET YSFM
YSFM IN AUTO MODE
00000 OR 00001
VIDEO
QUALITY
BAD
GOOD
SELECT WIDEBAND
FILTER AS PER
WYSFM[4:0]
SELECT AUTOMATIC
WIDEBAND FILTER
WYSFMOVR
1
0
USE YSFM SELECTED
FILTER REGARDLESS OF
VIDEO QUALITY
YES
NO
0
Figure 18. YSFM and WYSFM Control Flowchart
相關(guān)PDF資料
PDF描述
ADV7180BCPZ 10-Bit, 4 x Oversampling SDTV Video Decoder
ADV7180BSTZ 10-Bit, 4 x Oversampling SDTV Video Decoder
ADV7181 Multiformat SDTV Video Decoder
ADV7181B Multiformat SDTV Video Decoder
ADV7181BBCPZ Multiformat SDTV Video Decoder
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
ADV7180_12 制造商:AD 制造商全稱:Analog Devices 功能描述:10-Bit, 4?? Oversampling SDTV Video Decoder
ADV7180BCP32Z 制造商:Analog Devices 功能描述:10-BIT, 4? OVERSAMPLING SDTV VIDEO DECODER - Trays
ADV7180BCP32Z-RL 制造商:Analog Devices 功能描述:IC
ADV7180BCPZ 功能描述:IC VIDEO DECODER SDTV 40-LFCSP RoHS:是 類別:集成電路 (IC) >> 線性 - 視頻處理 系列:- 標(biāo)準(zhǔn)包裝:250 系列:- 類型:電平移位器 應(yīng)用:LCD 電視機(jī)/監(jiān)控器 安裝類型:表面貼裝 封裝/外殼:28-WFQFN 裸露焊盤 供應(yīng)商設(shè)備封裝:28-WQFN（4x4）裸露焊盤 包裝:帶卷 (TR) 其它名稱:296-32523-2TPS65198RUYT-ND
ADV7180BCPZ 制造商:Analog Devices 功能描述:IC VIDEO DECODER 10BIT 57.27MSPS LFCSP40
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