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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)： | 58/99頁(yè) |
| 文件大?。?/td> | 1757K |
| 代理商： | AK8850 |
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ASAHI KASEI
[AK8850]
7-4-15 NON-SIGNAL INPUT DETECTION
The AK8850 detects non-signal input conditions and, when detected, outputs a Black level signal ( Y=0x10,Cb/Cr=0x80 ).
The non-signal input condition is detected by checking for the existence of the VSYNC signal. In order to have higher
margin against non-Standard signal inputs, the non-signal detection is made only when the VSYNC is not detected two or
more consecutive times. The result is output via the NSIG output pin.
Output State:
NSIG=1
( non-signal input )
NSIG=0
( valid input signal )
7-4-16 STANDARD SIGNAL DETECTION
The AK8850 has a Standard Signal Detection function. When a non-Standard input signal is detected, the NSTD output
pin changes to “ high ”. The NSTD output becomes “ low ” (Standard signal input ) when either ( a ) or ( b ) conditions
below are met.
( a ) with Component input ( 525 / 625 ), the Frame configuration during the past 2 Frames is made with ODD / EVEN or
EVEN / ODD sequence.
( b ) with Composite input ( including Y/C input ), the SCH phase is within +/- 67.5 degrees and the Frame configuration is
made with ODD / EVEN or EVEN / ODD sequence.
7-4-17 OUTPUT FORMAT ( 601 FORMATTER )
The AK8850 outputs the decoded data in ITU-R BT.601 compatible format ( Y/Cb/Cr 4:2:2 ). The min. and max. values of
the output code are selectable by 601LIMIT-bit of the [ OUTPUT FORMAT REGISTER ].
At 601LIMIT-bit = 0
Y
: 1 ~ 254
Cb/Cr : 1 ~ 254
At 601LIMIT-bit = 1
Y
: 16 ~ 235
Cb / Cr : 16~ 240
Output Format Related Register :
bit 7
bit 6
bit 5
bit 4
bit 3
bit 2
bit 1
bit 0
ACTSTA[2]
ACTSTA[1]
ACTSTA[0]
YCDELAY[2]
YCDELAY[1]
YCDELAY[0]
601LIMIT
ERRHND
Default Value
0
Rev.0
61
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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