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| 型號： | ADV7180BSTZ-REEL |
| 廠商： | Analog Devices Inc |
| 文件頁數(shù)： | 57/116頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC VIDEO DECODER SDTV 64-LQFP |
| 產(chǎn)品變化通告： | ADV7180 Metal Mask Edit 22/Oct/2009 |
| 設計資源： | Low Cost Differential Video Receiver Using ADA4851 Amplifier and ADV7180 Video Decoder (CN0060) Low Cost Video Multiplexer for Video Switching Using ADA4853-2 Op Amp with Disable Function (CN0076) |
| 標準包裝： | 1 |
| 類型： | 視頻解碼器 |
| 應用： | 數(shù)碼相機，手機，便攜式視頻 |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 64-LQFP |
| 供應商設備封裝： | 64-LQFP（10x10） |
| 包裝： | 標準包裝 |
| 其它名稱： | ADV7180BSTZ-REELDKR |
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Data Sheet
ADV7180
Rev. I | Page 45 of 116
AV CODE INSERTION AND CONTROLS
This section describes the I2C-based controls that affect the
following:
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
Some of the decoded VBI data is inserted during the horizontal
blanking interval. See the Gemstar Data Recovery section for
more information.
BT.656-4, ITU-R BT.656-4 Enable, Address 0x04[7]
Between Revision 3 and Revision 4 of the ITU-R BT.656 standards,
the ITU has changed the toggling position for the V bit within
the SAV EAV codes for NTSC. The ITU-R BT.656-4 standard
bit allows the user to select an output mode that is compliant
with either the previous or new standard. For further information,
visit the International Telecommunication Union website.
Note that the standard change only affects NTSC and has no
bearing on PAL.
When ITU-R BT.656-4 is 0 (default), the ITU-R BT.656-3
specification is used. The V bit goes low at EAV of Line 10
and Line 273.
When ITU-R BT.656-4 is 1, the ITU-R BT.656-4 specification is
used. The V bit goes low at EAV of Line 20 and Line 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 (64-lead LQFP only), where Y and
Cr/Cb are delivered via separate data buses, the AV code is
spread over the whole 16 bits. The SD_DUP_AV bit allows the
user to replicate the AV codes on both buses; therefore, the full
AV sequence can be found on the Y bus as well as on the Cr/Cb
bus (see Figure 36).
When SD_DUP_AV is 0 (default), the AV codes are in single
fashion (to suit 8-bit interleaved data output).
When SD_DUP_AV is 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 ADV7180
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.
section for information on the chroma path.
When VBI_EN is 0 (default), all video lines are filtered/scaled.
When VBI_EN is 1, only the active video region is filtered/scaled.
Y DATA BUS
00
AV
Y
FF
00
AV
Y
FF
Cr/Cb DATA BUS
00
AV
Cb
FF
00
Cb
AV CODE SECTION
FF
00
AV
Cb
AV CODE SECTION
Cb/Y/Cr/Y
INTERLEAVED
8-BIT INTERFACE
16-BIT INTERFACE
SD_DUP_AV = 1
SD_DUP_AV = 0
05700-
027
Figure 36. AV Code Duplication Control (64-Lead LQFP Only)
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