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參數資料
型號: 935206750557
廠商: NXP SEMICONDUCTORS
元件分類: 消費家電
英文描述: SPECIALTY CONSUMER CIRCUIT, PQFP80
封裝: PLASTIC, SOT-318, QFP-80
文件頁數: 29/30頁
文件大小: 230K
代理商: 935206750557
1996 Oct 25
8
Philips Semiconductors
Preliminary specication
Progressive scan-Zoom and Noise
reduction IC (PROZONIC)
SAA4990H
Progressive scan
Progressive scan conversion produces a double number
of lines per field on the output. The field frequency is not
changed, while the line frequency is doubled.
Processing for progressive scan is different for two
successive output fields, e.g. the first output field has a
median operation on the odd lines, while the second has
the median operation on the even lines.
NON-INTERLACE MODE
With non-interlaced progressive scan output, line flicker is
removed because interlace is removed.
INTERLACE MODE
With interlaced progressive scan the output line structure
and line flicker is less visible (projection TV).
PROGRESSIVE SCAN CONVERSION
Fig.5 Progressive scan conversion.
handbook, full pagewidth
MGE028
output
1fH, 1fv
output
2fH, 1fv
frame1, 1
frame1, 2
frame2, 1
frame2, 2
frame1, 1
frame1, 2
frame2, 1
frame2, 2
frame1
median
a. Non-interlaced output; (625/50/1:1) or (525/60/1:1):
b. Interlaced output; (1250/50/2:1) or (1050/60/2:1):
median
frame2
frame1
frame2
median
fieldA
1
fieldA
3
fieldA
5
fieldB
2
fieldB
4
fieldB
4
fieldB
3, 4
fieldA
3
fieldA
2,3
fieldB
2
fieldB
1, 2
fieldA
1
fieldA
1,1
fieldA
2,1
fieldB
1,2
fieldB
2,2
fieldA
4,5
相關PDF資料
PDF描述
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