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參數(shù)資料
| 型號： | SDA9400 |
| 廠商： | MICRONAS SEMICONDUCTOR HOLDING AG |
| 英文描述： | Scan Rate Converter using Embedded DRAM Technology Units |
| 中文描述： | 掃描頻率轉換器采用嵌入式DRAM技術股 |
| 文件頁數(shù)： | 34/94頁 |
| 文件大?。?/td> | 1180K |
| 代理商： | SDA9400 |
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SDA 9400
Micronas
34
Preliminary Data Sheet
Block diagram of global motion, movie mode and phase detection
The muxout and FID3 values (Field difference 1, see also
Motion detection for scan rate conversion
on page 29) are accumulated during each incoming field. After accumulation the value COUNTGM
is compared with a threshold TH. It is assumed, that the whole picture is moving, if the accumulated
value is greater than the threshold (SHYST=1). Otherwise it will be assumed, that the picture is still
(SHYST=0). The threshold TH itself depends on the actual GMOTION value. This is a kind of spatial
hysteresis. If the actual GMOTION value is zero, then TH is equal GMTHU. In the other case that
GMOTION is one, TH is equal GMTHL.
Behaviour spatial hysteresis
The time hysteresis block generates the final GMOTION value. The GMOTION value will only
changed, if at least the last GMAM/GMAS fields had the same SHYST value.
Behaviour of time hysteresis
SHYST
1
0
COUNT >= TH
COUNT < TH
TH
GMOTION
64 * GMTHU
64 * GMTHL
0
1
GMOTION(T)
0
last GMAS fields, SHYST were 0
FID3
Counter
Hysteresis
spatial
Hysteresis
time
GMTHL GMTHU
GMAS GMAM
GMOTION
SHYST
MOVIE
MODE AND
PHASE
DETECTION
MOVMO
MOVPH
MMTHL
MOVPHINV THYON
RESMOV AMMON
MMTC
COUNTGM
g
Counter
muxout
COUNTMOV
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