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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)： | 54/99頁(yè) |
| 文件大小： | 1757K |
| 代理商： | AK8850 |
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ASAHI KASEI
[AK8850]
A procedure to read out each data is described here.
[Request VBI Info Register]
xxRQ-bit = 1
(Decode Request)
Start
[Status 2 Regsiter] Read
(Check decode status bit)
If xx-bit = 1
No
If Closed Caption, then CCRQ-bit
If VBID, then VBIDRQ-bit
If WSS, then WSSRQ-bit
If Closed Caption, then CC-bit
If VBID, then VBID-bit
If WSS, then WSS-bit
Yes
Read Data Register
If Closed Caption, then[Closed Caption 1 2 Register]
If VBID, then [VBID 1 2 Register]
If WSS, then [VBID 1 Register][WSS 2 & ASPECT Data Register]
READ OPERATION OF CLOSED CAPTION DATA :
To read closed-caption data, write “1” to the CCRQ-bit. The AK8850 will enter a wait state for the Closed Caption data
decoding. Upon receipt of the data, it is decoded and when decoding is completed, ”1” is sent back to CC-bit of the
[ STATUS 2 REGISTER ].
The CC-bit is usually at “1” right after a reset ( it becomes “0” by writing “1” at CCRQ-bit ).
The decoded data is written into the [ CLOSED CAPTION 1.2 REGISTER ] as shown. Data in the [ CLOSED CAPTION
1.2 REGISTER ] is remains in this register until it is over-written.
* [ CLOSED CAPTION 1 REGISTER ]
bit 7
bit 6
bit 5
bit 4
bit 3
bit 2
bit 1
bit 0
CC7
CC6
CC5
CC4
CC3
CC2
CC1
CC0
* [ CLOSED CAPTION 2 REGISTER ]
bit 7
bit 6
bit 5
bit 4
bit 3
bit 2
bit 1
bit 0
CC15
CC14
CC13
CC12
CC11
CC10
CC9
CC8
READ OPERATION OF CLOSED CAPTION EXTENDED DATA :
Write “1” at EXTRQ-bit, which places the AK8850 into a wait state while Extended Data decoding occurs. The received
data is decoded and after the decoding is completed,”1” is sent back to EXT-bit of the [ STATUS 2 REGISTER ]. EXT-bit
is usually at “1” right after the reset ( it becomes “0” by writing “1” at EXTRQ-bit ).
Then the decoded data is written into the [ EXTENDED DATA 1.2 REGISTER ] as shown. Data in the [ EXTENDED DATA
1.2 REGISTER ] remains in this register it is over-written.
* [ EXTENDED DATA 1 REGISTER ]
bit 7
bit 6
bit 5
bit 4
bit 3
bit 2
bit 1
bit 0
EXT7
EXT6
EXT5
EXT4
EXT3
EXT2
EXT1
EXT0
* [ EXTENDED DATA 2 REGISTER ]
bit 7
bit 6
bit 5
bit 4
bit 3
bit 2
bit 1
bit 0
EXT15
EXT14
EXT13
EXT12
EXT11
EXT10
EXT9
EXT8
Rev.0
58
2003/01
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AK-8850 | 功能描述:機(jī)架和機(jī)柜配件 ANCHOR KIT SEISMIC R RoHS:否 制造商:Bivar 產(chǎn)品:Rack Accessories 面板空間: 顏色:Black |
| AK8851 | 制造商:AKM 制造商全稱:AKM 功能描述:NTSC/PAL/SECAM Digital Video Decoder |
| AK8851VQ | 制造商:AKM 制造商全稱:AKM 功能描述:NTSC/PAL/SECAM Digital Video Decoder |
| AK8853VN | 制造商:AKM 制造商全稱:AKM 功能描述:NTSC/PAL/SECAM Digital Video Decoder |
| AK8853XQ | 制造商:AKM 制造商全稱:AKM 功能描述:NTSC/PAL/SECAM Digital Video Decoder |
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