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參數資料
| 型號： | 935260566151 |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 顏色信號轉換 |
| 英文描述： | COLOR SIGNAL ENCODER, PQFP44 |
| 封裝： | PLASTIC, SOT-307, QFP-44 |
| 文件頁數： | 17/59頁 |
| 文件大小： | 232K |
| 代理商： | 935260566151 |
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2000 Mar 08
24
Philips Semiconductors
Product specication
Digital video encoder
SAA7128H; SAA7129H
Table 32 Subaddress 5BH
Table 33 GAINU values
Note
1. All IRE values are rounded up
Table 34 Subaddress 5CH
Table 35 GAINV values
Note
1. All IRE values are rounded up.
BIT
SYMBOL
DESCRIPTION
7 to 0
GAINU[7:0]
These are the 8 LSBs of the 9-bit code that selects the variable gain for the CB signal;
input representation in accordance with
“ITU-R BT.601”; see Table 33. The MSB is held
in subaddress 5DH, see Table 36.
CONDITIONS(1)
ENCODING
white-to-black = 92.5 IRE
GAINU =
2.17 × nominal to +2.16 × nominal
GAINU[8:0] = 0
output subcarrier of U contribution = 0
GAINU[8:0] = 118 (76H)
output subcarrier of U contribution = nominal
white-to-black = 100 IRE
GAINU =
2.05 × nominal to +2.04 × nominal
GAINU[8:0] = 0
output subcarrier of U contribution = 0
GAINU[8:0] = 125 (7DH)
output subcarrier of U contribution = nominal
GAINU[8:0] = 106 (6AH)
nominal GAINU for SECAM encoding
BIT
SYMBOL
DESCRIPTION
7 to 0
GAINV[7:0]
These are the 8 LSBs of the 9-bit code that selects the variable gain for the CR signal;
input representation in accordance with
“ITU-R BT.601”; see Table 35. The MSB is held
in subaddress 5EH, see Table 38.
CONDITIONS(1)
ENCODING
white-to-black = 92.5 IRE
GAINV =
1.55 × nominal to +1.55 × nominal
GAINV[8:0] = 0
output subcarrier of V contribution = 0
GAINV[8:0] = 165 (A5H)
output subcarrier of V contribution = nominal
white-to-black = 100 IRE
GAINV =
1.46 × nominal to +1.46 × nominal
GAINV[8:0] = 0
output subcarrier of V contribution = 0
GAINV[8:0] = 175 (AFH)
output subcarrier of V contribution = nominal
GAINV[8:0] = 129 (81H)
nominal GAINV for SECAM encoding
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