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參數(shù)資料
| 型號(hào)： | AK8850 |
| 廠商： | Asahi Kasei Microsystems Co.,Ltd |
| 英文描述： | NTSC Digital Video Decoder |
| 中文描述： | NTSC制式數(shù)字視頻解碼器 |
| 文件頁(yè)數(shù)： | 53/99頁(yè) |
| 文件大?。?/td> | 1757K |
| 代理商： | AK8850 |
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ASAHI KASEI
[AK8850]
7-4-11 CLOSED CAPTION/CLOSED CAPTION EXTENDED DATA/VBID ( CGMS )/WSS
It is possible to request decoding of Closed Caption, Closed Caption Extended Data, VBID and WSS signals by
programming the [ REQUEST VBI INFORMATION REGISTER ].
The [ STATUS 2 REGISTER ] tells a host that data is detected and idecoding has been completed for a given decode
request.
Decoded data are written into the [ CLOSED CAPTION 1.2 REGISTER ], [ VBID 1.2 REGISTER ], [ WSS 1 REGISTER ]
and [ WSS 2 & ASPECT DATA REGISTER ] respectively.
The Closed Caption Data, Closed Caption Extended Data, VBID and WSS Data are encoded on each specified line
respectively as listed below.
Closed Caption
: NTSC specified line
21
st Line
Closed Caption Extended Data : NTSC specified line
284
th Line
VBID ( CGMS Data ) : 525 system specified line
20
th Line / 238th Line
625 system specified line
20
th Line / 338th Line
WSS ( 625 system only ) : 625 system specified line
23
rd Line
VBI Information Request Register :
* [ REQUEST VBI INFO REGISTER ]
bit 7
bit 6
bit 5
bit 4
bit 3
bit 2
bit 1
bit 0
Reserved
WSSRQ
VBIDRQ
EXTRQ
CCRQ
ASPECTRQ
Default Value
0
* [ STATUS 2 REGISTER ]
bit 7
bit 6
bit 5
bit 4
bit 3
bit 2
bit 1
bit 0
APS1
APS0
Reserved
WSS
VBID
EXT
CC
ASPECT
* Read –out Line Number of the VBI information for each mode is as follows.
NTSC(525 System)
625 System
Component
Composite
Y/C
Betacam
MII
Component
Closed Caption
Line 21
Line 22
Extended Data
Line 284
Line 335
VBID
Line 20/Line 283
Line 20/Line 333
WSS
Line 23
Rev.0
57
2003/01
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相關(guān)代理商/技術(shù)參數(shù) |
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| AK8853VN | 制造商:AKM 制造商全稱(chēng):AKM 功能描述:NTSC/PAL/SECAM Digital Video Decoder |
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