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參數(shù)資料
| 型號： | ADV7184 |
| 廠商： | Analog Devices, Inc. |
| 英文描述： | Multiformat SDTV Video Decoder with Fast Switch Overlay Support |
| 中文描述： | 標清多格式視頻解碼器支持快速開關(guān)重疊 |
| 文件頁數(shù)： | 39/108頁 |
| 文件大?。?/td> | 925K |
| 代理商： | ADV7184 |
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ADV7184
AV CODE INSERTION AND CONTROLS
This section describes the I
2
C-based controls that affect
Rev. 0 | Page 39 of 108
Insertion of AV codes into the data stream
Data blanking during the vertical blank interval (VBI)
The range of data values permitted in the output data
stream
The relative delay of luma vs. chroma signals
Note that some of the decoded VBI data is being inserted
during the horizontal blanking interval. See the Gemstar Data
Recovery section for more information.
BT656-4 ITU Standard BT-R.656-4 Enable, Address 0x04 [7]
The ITU has changed the position for toggling the V bit within
the SAV EAV codes for NTSC between revisions 3 and 4. The
BT656-4 standard bit allows the user to select an output mode
that is compliant with either the previous or the new standard.
For more information, review the standard at http://www.itu.int.
Note that the standard change affects NTSC only and has no
bearing on PAL.
0 (default)—The BT656-3 specification is used. The V bit goes
low at EAV of Lines 10 and 273.
1—The BT656-4 specification is used. The V bit goes low at
EAV of Lines 20 and 283.
SD_DUP_AV Duplicate AV Codes, Address 0x03 [0]
Depending on the output interface width, it may be necessary to
duplicate the AV codes from the luma path into the chroma path.
In an 8-bit-wide output interface (Cb/Y/Cr/Y interleaved data),
the AV codes are defined as FF/00/00/AV, with AV being the
transmitted word that contains information about H/V/F. In
this output interface mode, the following assignment takes
place: Cb = FF, Y = 00, Cr = 00, and Y = AV.
In a 16-bit output interface where Y and Cr/Cb are delivered via
separate data buses, the AV code is over the whole 16 bits. The
SD_DUP_AV bit allows the user to replicate the AV codes on
both buses, so the full AV sequence can be found on the Y bus
and on the Cr/Cb bus. See Figure 25.
0 (default)—The AV codes are in single fashion (to suit 8-bit
interleaved data output).
1—The AV codes are duplicated (for 16-bit interfaces).
VBI_EN Vertical Blanking Interval Data Enable,
Address 0x03 [7]
The VBI enable bit allows data such as intercast and closed
caption data to be passed through the luma channel of the
decoder with a minimal amount of filtering. All data for Line 1
to Line 21 is passed through and available at the output port.
The ADV7184 does not blank the luma data, and automatically
switches all filters along the luma data path into their widest
bandwidth. For active video, the filter settings for YSH and YPK
are restored.
Refer to the BL_C_VBI Blank Chroma during VBI, Address
0x04 [2] section for information on the chroma path.
0 (default)—All video lines are filtered/scaled.
1—Only the active video region is filtered/scaled.
BL_C_VBI Blank Chroma during VBI, Address 0x04 [2]
When BL_C_VBI is set high, the Cr and Cb values of all VBI
lines are blanked. This is done so any data that may arrive
during VBI is not decoded as color and output through Cr and
Cb. As a result, it is possible to send VBI lines into the decoder,
then output them through an encoder again, undistorted.
Without this blanking, any wrongly decoded color is encoded
by the video encoder; therefore, the VBI lines are distorted.
0—Decodes and outputs color during VBI.
1 (default)—Blanks Cr and Cb values during VBI.
0
Y DATA BUS
00
AV
Y
FF
00
00
AV
Y
FF
Cr/Cb DATA BUS
00
00
AV
Cb
FF
00
Cb
AV CODE SECTION
AV CODE SECTION
FF
00
00
AV
Cb
AV CODE SECTION
Cb/Y/Cr/Y
INTERLEAVED
8-BIT INTERFACE
16-BIT INTERFACE
16-BIT INTERFACE
SD_DUP_AV = 1
SD_DUP_AV = 0
Figure 25. AV Code Duplication Control
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ADV7184BSTZ | 功能描述:IC DECODER VID SDTV MULTI 80LQFP 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 |
| ADV7185 | 制造商:AD 制造商全稱:Analog Devices 功能描述:Professional NTSC/PAL Video Decoder with 10-Bit CCIR656 Output |
| ADV7185KST | 制造商:AD 制造商全稱:Analog Devices 功能描述:Professional NTSC/PAL Video Decoder with 10-Bit CCIR656 Output |
| ADV7186 | 制造商:AD 制造商全稱:Analog Devices 功能描述:Video Decoder and Display Processor |
| ADV7186BBCZ | 功能描述:IC VIDEO DECODER 196CSPBGA RoHS:是 類別:集成電路 (IC) >> 線性 - 視頻處理 系列:- 產(chǎn)品變化通告:Product Discontinuation 07/Mar/2011 標準包裝:3,000 系列:OMNITUNE™ 類型:調(diào)諧器 應(yīng)用:移動電話，手機，視頻顯示器 安裝類型:表面貼裝 封裝/外殼:65-WFBGA 供應(yīng)商設(shè)備封裝:PG-WFSGA-65 包裝:帶卷 (TR) 其它名稱:SP000365064 |
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