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| 型號： | ADV7189 |
| 廠商： | Analog Devices, Inc. |
| 英文描述： | Multiformat SDTV Video Decoder |
| 中文描述： | 標(biāo)清多格式視頻解碼器 |
| 文件頁數(shù)： | 41/104頁 |
| 文件大?。?/td> | 890K |
| 代理商： | ADV7189 |
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ADV7189
BL_C_VBI Blank Chroma during VBI (SDP),
Address 0x04, [2]
Setting BL_C_VBI high, the Cr and Cb values of all VBI lines
get blanked. This is done so any data that may come during VBI
is not decoded as color and output through Cr and Cb. As a
result, it should be possible to send VBI lines into the decoder,
then output them through an encoder again, undistorted.
Without this blanking, any wrongly decoded color gets encoded
by the video encoder; therefore, the VBI lines are distorted.
Table 93. BL_C_VBI Function
BL_C_VBI
Description
0
Decode and output color during VBI.
1*
Blank Cr and Cb values during VBI (no color, 0x80).
*Default value.
Rev. A | Page 41 of 104
RANGE Range Selection (SDP), Address 0x04, [0]
AV codes (as per ITU-R BT-656, formerly known as CCIR-656)
consist of a fixed header made up of 0xFF and 0x00 values.
These two values are reserved and therefore are not to be used
for active video. Additionally, the ITU also specifies that the
nominal range for video should be restricted to values between
16 and 235 for luma and 16 to 240 for chroma.
The RANGE bit allows the user to limit the range of values
output by the ADV7189 to the recommended value range. In
any case, it is ensured that the reserved values of 255
d
(0xFF)
and 00
d
(0x00) are not presented on the output pins unless they
are part of an AV code header.
Table 94. RANGE Function
RANGE
Description
0
16 ≤ Y ≤ 235
1*
1 ≤ Y ≤ 254
*Default value.
16 ≤ C/P ≤ 240
1 ≤ C/P ≤ 254
AUTO_PDC_EN Automatic Programmed Delay Control
(SDP), Address 0x27, [6]
Enabling the AUTO_PDC_EN function activates a function
within the ADV7189 that automatically programs the LTA[1:0]
and CTA[2:0] to have the chroma and luma data match delays
for all modes of operation. If set, manual registers LTA[1:0] and
CTA[2:0] is not used by the SDP. If the automatic mode is
disabled (via setting the AUTO_PDC_EN bit to 0), the values
programmed into LTA[1:0] and CTA[2:0] registers take effect.
Table 95. AUTO_PDC_EN Function
AUTO_PDC_EN
Description
0
Use LTA[1:0] and CTA[2:0] values for delaying
luma and chroma samples. Refer to the
LTA[1:0] Luma Timing Adjust (SDP), Address
0x27, [1:0] and CTA[2:0] Chroma Timing
Adjust (SDP), Address 0x27, [5:3] sections.
1*
The ADV7189 automatically determines the
LTA and CTA values to have luma and chroma
aligned at the output.
*Default value.
LTA[1:0] Luma Timing Adjust (SDP), Address 0x27, [1:0]
The Luma Timing Adjust register allows the user to specify a
timing difference between chroma and luma samples.
Please note the following:
There is a certain functionality overlap with the CTA[2:0]
register.
For manual programming, use the following defaults:
o
CVBS input LTA[1:0] = 00.
o
YC input LTA[1:0] = 01.
o
YPrPb input LTA[1:0] =01.
Table 96. LTA Function
LTA[1:0]
Description
00*
No delay.
01
Luma 1 clk (37 ns) delayed.
10
Luma 2clk (74 ns) early.
11
Luma 1 clk (37 ns) early.
*Default value.
CTA[2:0] Chroma Timing Adjust (SDP), Address 0x27, [5:3]
The Chroma Timing Adjust register allows the user to specify a
timing difference between chroma and luma samples. This may
be used to compensate for external filter group delay differences
in the luma versus chroma path, and to allow for a different
number of pipeline delays while processing the video down-
stream. Please review this functionality together with the
LTA[1:0] register.
Note that the chroma can only be delayed/advanced in chroma
pixel steps. One chroma pixel step is equal to two luma pixels.
The programmable delay occurs after demodulation, where one
can no longer delay by luma pixel steps.
For manual programming use the following defaults:
CVBS input CTA[2:0] = 011.
YC input CTA[2:0] = 101.
YPrPb input CTA[2:0] =110.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ADV7189B | 制造商:AD 制造商全稱:Analog Devices 功能描述:Multiformat SDTV Video Decoder |
| ADV7189BBSTZ | 功能描述:IC VIDEO DECODER SDTV 80-LQFP RoHS:是 類別:集成電路 (IC) >> 接口 - 編碼器，解碼器，轉(zhuǎn)換器 系列:- 產(chǎn)品變化通告:Development Systems Discontinuation 26/Apr/2011 標(biāo)準包裝:1 系列:- 類型:編碼器 應(yīng)用:DVB-S.2 系統(tǒng) 電壓 - 電源，模擬:- 電壓 - 電源，數(shù)字:- 安裝類型:- 封裝/外殼:模塊 供應(yīng)商設(shè)備封裝:模塊 包裝:散裝 其它名稱:Q4645799 |
| ADV7189BBSTZ268H | 制造商:AD 制造商全稱:Analog Devices 功能描述:Multiformat SDTV Video Decoder |
| ADV7189BBSTZ268H2 | 制造商:AD 制造商全稱:Analog Devices 功能描述:Multiformat SDTV Video Decoder |
| ADV7189BKST | 制造商:Analog Devices 功能描述: |
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