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參數(shù)資料
| 型號： | 8817 |
| 廠商： | Asahi Kasei Microsystems Co.,Ltd |
| 英文描述： | NTSC/PAL Digital Video Encoder |
| 中文描述： | NTSC / PAL數(shù)字視頻編碼器 |
| 文件頁數(shù)： | 28/43頁 |
| 文件大小： | 818K |
| 代理商： | 8817 |
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ASAHI KASEI
[AK8817]
MS0413-E-00
28
2005 / Aug
(17) Video ID
The AK8817 supports to encode the Video ID ( EIAJ CPR-1204 ) which distinguishes the aspect ratio etc..
This is also used as CGMS ( Copy Generation Management System ).
Turning “ON/OFF” of this function is made by setting both VMOD-bit = 0 and VBID-bit = 1 of { Control 1 Register (0x00) }.
And data to be set is written into { VBID / WSS Data1 & 2 Registers ( 0x02,0x03 )}.
Video ID information is the highest order of priority information among VBI information
VBID Data Update timing .
VSYNC
NEW DATA
DATA
OLD DATA
NEW DATA
u-P Data
Set Control Register
VBID Code assignment
20 bit data is configured with WORD0 = 2 bit, WORD1 = 4 bit, WORD2 = 8 bit and CRC = 6 bit.
CRC is automatically calculated and added by the AK8817.
Default values of CRC polynomial expression X6 + X + 1 are all ones.
-data configuration
bit1
bit20
DATA
WORD0
2bit
WORD1
4bit
WORD2
8bit
CRC
6bit
VBID Waveform
Ref.
bit1 bit2 bit3
bit20
2.235usec +/- 50nsec
11.2usec +/- 0.3usec
49.1usec +/- 0.44usec
1H
70IRE +/- 10IRE
0IRE 5 IRE
525/60 System
70IRE
20/283
Amplitude
Encode Line
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