參數(shù)資料
型號: 935262451518
廠商: NXP SEMICONDUCTORS
元件分類: 顏色信號轉(zhuǎn)換
英文描述: COLOR SIGNAL DECODER, PQFP100
封裝: 14 X 14 X 1.40 MM, PLASTIC, SOT-407, LQFP-100
文件頁數(shù): 89/144頁
文件大?。?/td> 592K
代理商: 935262451518
2000 Mar 15
49
Philips Semiconductors
Preliminary specication
PAL/NTSC/SECAM video decoder with adaptive PAL/NTSC
comb lter, VBI-data slicer and high performance scaler
SAA7114H
Fig.28 Basic problem of interlaced vertical scaling (example: down-scale 3
5).
handbook, full pagewidth
MHB547
mismatched vertical line distances
scale dependent start offset
correct scale dependent position
unscaled input
scaled output,
no phase offset
scaled output,
with phase offset
eld 1
eld 2
eld 1
eld 2
eld 1
eld 2
Fig.29 Derivation of the phase related equations (example: interlace vertical scaling down to 3
5,
with field conversion).
Offset
1024
32
-------------
32
1 line shift
==
=
A
1
2
--- input line shift
16
==
D = no offset = 0
B
1
2
--- input line shift
1
2
--- scale increment
+
YSCY[15:0]
64
-------------------------------
16
+
==
C
1
2
--- scale increment
YSCY[15:0]
64
-------------------------------
==
handbook, full pagewidth
MHB548
eld 1
eld 2
upper
lower
eld 1
eld 2
case UP-UP
case LO-LO
eld 1
eld 2
case UP-LO
case LO-UP
A
B
C
D
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