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
文件頁數(shù)： 59/99頁
文件大?。?/td> 1757K
代理商： AK8850
ASAHI KASEI
[AK8850]
7-4-18 SETUP
Enabling and Disabling SETUP is selected by the [ INPUT VIDEO STANDARD REGISTER ]. When the SETUP-bit is
“1”, internal signal processing is performed, assuming that the SETUP signal is input. This signal is processed outside of
the VBI period. The VBI period is set by the [ VERTICAL BLANKING LENGTH REGISTER ].
Signal Set Register with SETUP Features :
When the input signal contains a SETUP command, set [ SETUP ]-bit of the [ INPUT VIDEO STANDARD REGISTER ] to
“1”.
* Input Video Standard Register
bit 7
bit 6
bit 5
bit 4
bit 3
bit 2
bit 1
bit 0
Reserved
NENT
B/W
SETUP
VS3
VS2
VS1
VS0
Default Value
0
* SETUP-bit Set
SETUP-bit
Setup
Note
0
without Setup
1
with Setup
Setup process should be done exclusive the
term of VBI interval.
Setting is not affected by input signal types ( Composite, YC and Component signals ).
When the SETUP-bit is set at “1”, the following conversion is performed on input signal.
On 286 mV SYNC system signals (NTSC Composite, YC signal, Betacam signal ) with SETUP,
Luminance signal ( Y ) : Y = ( Y- 42 ) / 0.925 ;
Chroma signal ( U / V ) : Pb = Pb / 0.925 ;
Pr = Pr / 0.925 ;
On 300 mV SYNC systems ( MII signal ) with SETUP ,
Luminance signal ( Y ) : Y = ( Y-41 ) / 0.925 ;
Chroma signal ( U / V ) : Pb = Pb / 0.925 ;
Pr = Pr / 0.925 ;
Rev.0
62
2003/01
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