參數(shù)資料
型號: SAA7140A
廠商: NXP SEMICONDUCTORS
元件分類: 消費家電
英文描述: High Performance Scaler HPS
中文描述: SPECIALTY CONSUMER CIRCUIT, PQFP128
文件頁數(shù): 27/68頁
文件大?。?/td> 432K
代理商: SAA7140A
1996 Sep 04
27
Philips Semiconductors
Objective specification
High Performance Scaler (HPS)
SAA7140A; SAA7140B
Fig.15 Example of vertical accumulation.
handbook, full pagewidth
optimal weighting factors:
line 1
line 2
line 10
1st sequence
2nd sequence
3rd s equence
1
2
2
1
2
2
1
2
2
1
YACL = INT{(1-S)/S} = 2 (dotted lines)
YSCI = INT{(1024
×
(1-S)} = 682
YP = INT{YSCI/16} = 42
MHA120
Table 2
Vertical scaling and normalization
VERTICAL
SCALE RATIO
(YSCI 3
)
1 to
1
2
(0)
1
2
to
1
3
(512)
YACL
COEFFICIENT SEQUENCE
(example)
CYA
(HEX)
CYB
(HEX)
WEIGHT
SUM
DCGY
BCS
(CONT/SAT)
= x/y
×
64
1
0
1-1
01
00
2
0
1
1-1-1
1-2-1
1-1-1-1
03
01
03
00
02
00
3
4
4
0
1
1
2
3
1
1
1
3
to
1
4
(683)
1
4
to
1
5
(768)
2
3
1-1-1-1-1
1-2-2-2-1
111 111
121 121
112 211
111 1 111
111 2 111
1111 1111
07
01
07
05
03
0F
07
0F
00
06
00
02
04
00
08
00
5
8
6
8
8
7
8
8
1
2
1
2
2
2
2
2
4
5
1
4
6
1
1
8
7
1
1
1
5
to
1
6
(820)
4
1
6
to
1
7
(854)
5
1
7
to
1
8
(878)
1
8
to
1
9
(896)
6
7
1111 1 1111
1222 2 2221
1111 1 1 1111
2121 2 2 1212
1122 2 2 2211
1111 1 1 1 1111
1212 1 2 1 2121
1112 2 2 2 2111
1111 11 11 1111
1211 21 12 1121
1111 22 22 1111
1F
01
1F
09
03
3F
15
07
3F
2D
0F
00
1E
00
15
1C
00
2A
38
00
12
30
9
2
3
3
3
3
2
3
3
2
3
3
8
9
1
8
10
1
1
8
11
1
1
8
12
1
1
16
10
16
16
11
16
16
12
16
16
1
9
to
1
10
(911)
8
1
10
to
1
11
(922)
9
1
11
to
1
12
(931)
10
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