SAA7129 Philips Semiconductors, SAA7129 Datasheet - Page 24

• Manufacturer Part Number: SAA7129
• Description: Digital video encoder
• Manufacturer: Philips Semiconductors

Philips Semiconductors
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.
2000 Mar 08
white-to-black = 92.5 IRE
GAINU[8:0] = 0
GAINU[8:0] = 118 (76H)
white-to-black = 100 IRE
GAINU[8:0] = 0
GAINU[8:0] = 125 (7DH)
GAINU[8:0] = 106 (6AH)
white-to-black = 92.5 IRE
GAINV[8:0] = 0
GAINV[8:0] = 165 (A5H)
white-to-black = 100 IRE
GAINV[8:0] = 0
GAINV[8:0] = 175 (AFH)
GAINV[8:0] = 129 (81H)
Digital video encoder
7 to 0
7 to 0
BIT
BIT
CONDITIONS
CONDITIONS
GAINU[7:0]
GAINV[7:0]
SYMBOL
SYMBOL
(1)
(1)
These are the 8 LSBs of the 9-bit code that selects the variable gain for the C
input representation in accordance with “ITU-R BT.601” ; see Table 33. The MSB is held
in subaddress 5DH, see Table 36.
GAINU = 2.17
output subcarrier of U contribution = 0
output subcarrier of U contribution = nominal
GAINU = 2.05
output subcarrier of U contribution = 0
output subcarrier of U contribution = nominal
nominal GAINU for SECAM encoding
These are the 8 LSBs of the 9-bit code that selects the variable gain for the C
input representation in accordance with “ITU-R BT.601” ; see Table 35. The MSB is held
in subaddress 5EH, see Table 38.
GAINV = 1.55
output subcarrier of V contribution = 0
output subcarrier of V contribution = nominal
GAINV = 1.46
output subcarrier of V contribution = 0
output subcarrier of V contribution = nominal
nominal GAINV for SECAM encoding
nominal to +1.55
nominal to +1.46
nominal to +2.16
nominal to +2.04
24
DESCRIPTION
DESCRIPTION
nominal
nominal
nominal
nominal
ENCODING
ENCODING
SAA7128H; SAA7129H
Product specification
B
R
signal;
signal;