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參數(shù)資料
| 型號： | EVAL-ADV7180LQEBZ |
| 廠商： | Analog Devices Inc |
| 文件頁數(shù)： | 67/116頁 |
| 文件大?。?/td> | 0K |
| 描述： | BOARD EVALUATION ADV7180 |
| 標準包裝： | 1 |
| 系列： | Advantiv® |
| 主要目的： | 視頻，SDTV 視頻解碼器 - NTSC，PAL，SECAM |
| 嵌入式： | 否 |
| 已用 IC / 零件： | ADV7180 |
| 主要屬性： | CVBS（復合），Y/C（S 視頻）和 YPrPb（元件）輸入 |
| 次要屬性： | 8 位 ITU-R BT.656 YCrCb 4:2:2 輸出 |
| 已供物品： | 板 |
| 相關產(chǎn)品： | ADV7180BCPZ-REEL-ND - IC VIDEO DECODER SDTV 40-LFCSP ADV7180BSTZ-ND - IC VIDEO DECODER SDTV 64-LQFP ADV7180BCPZ-ND - IC VIDEO DECODER SDTV 40-LFCSP |
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ADV7180
Data Sheet
Rev. I | Page 54 of 116
SYNC PROCESSING
The ADV7180 has two additional sync processing blocks that
postprocess the raw synchronization information extracted
from the digitized input video. If desired, the blocks can be
disabled via the following two I2C bits: ENHSPLL and
ENVSPROC.
ENHSPLL, Enable HSYNC Processor, Address 0x01[6]
The HSYNC processor is designed to filter incoming HSYNCs that
have been corrupted by noise, providing improved performance
for video signals with stable time bases but poor SNR.
Setting ENHSPLL to 0 disables the HSYNC processor.
Setting ENHSPLL to 1 (default) enables the HSYNC processor.
ENVSPROC, Enable VSYNC Processor, Address 0x01[3]
This block provides extra filtering of the detected VSYNCs to
improve vertical lock.
Setting ENVSPROC to 0 disables the VSYNC processor.
Setting ENVSPROC to 1 (default) enables the VSYNC processor.
VBI DATA DECODE
The following are the two VBI data slicers on the ADV7180: the
VBI data processor (VDP) and the VBI System 2.
The VDP can slice both low bandwidth standards and high
bandwidth standards such as teletext. VBI System 2 can slice
low data rate VBI standards only.
The VDP is capable of slicing multiple VBI data standards on
SD video. It decodes the VBI data on the incoming CVBS and
Y/C or YUV data. The decoded results are available as ancillary
data in output 656 data stream. For low data rate VBI standards
like CC/WSS/CGMS, users can read the decoded data bytes
from the I2C registers.
The VBI data standards that can be decoded by the VDP are
listed in Table 67 and Table 68.
Table 67. PAL
Feature
Standard
Teletext System A, C, or D
ITU-R BT.653
Teletext System B/WST
ITU-R BT.653
Video Programming System (VPS)
ETSI EN 300 231 V 1.3.1
Vertical Interval Time Codes (VITC)
Not applicable
Wide Screen Signaling (WSS)
ITU-R BT.1119-1/
ETSI EN.300294
Closed Captioning (CCAP)
Not applicable
Table 68. NTSC
Feature
Standard
Teletext System B and D
ITU-R BT.653
Teletext System C/NABTS
ITU-R BT.653/EIA-516
Vertical Interval Time Codes (VITC)
Not applicable
Copy Generation Management
System (CGMS)
EIA-J CPR-1204/IEC 61880
Gemstar
Not applicable
Closed Captioning (CCAP)
EIA-608
The VBI data standard that the VDP decodes on a particular
line of incoming video has been set by default as described in
Table 69. This can be overridden manually and any VBI data can
be decoded on any line. The details of manual programming are
described in Table 70.
VDP Default Configuration
The VDP can decode different VBI data standards on a line-to-
line basis. The various standards supported by default on different
lines of VBI are explained in Table 69.
VDP Manual Configuration
MAN_LINE_PGM, Enable Manual Line Programming of
VBI Standards, Address 0x64[7], User Sub Map
The user can configure the VDP to decode different standards on
a line-to-line basis through manual line programming. For this,
the user must set the MAN_LINE_PGM bit. The user must write
into all the line programming registers, VBI_DATA_Px_Ny and
VBI_DATA_Px (see Register 0x64 to Register 0x77 in Table 108).
When MAN_LINE_PGM to 0 (default) is set, the VDP decodes
default standards on lines, as shown in Table 69.
When MAN_LINE_PGM to 1 is set, the VBI standards to be
decoded are manually programmed.
VBI_DATA_Px_Ny[3:0], VBI_DATA_Px[3:0], VBI
Standard to be Decoded on Line X for PAL, Line Y for
NTSC, Address 0x64 to Address 0x77, User Sub Map
These are related 4-bit clusters in Register 0x64 to Register 0x77
of the user sub map. These 4-bit, line programming registers,
VBI_DATA_Px_Ny and VBI_DATA_Px, identify the VBI data
standard that are decoded on Line X in PAL mode or on Line Y
in NTSC mode. The different types of VBI standards decoded
by VBI_DATA_Px_Ny and VBI_DATA_Px are shown in Table 70.
Note that the X or Y value depends on whether the ADV7180 is
in PAL or NTSC mode.
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