SAA7120H Datasheet, PDF (14/36 Pages) NXP Semiconductors – Digital video encoder

Philips Semiconductors
Digital video encoder
Product specification
SAA7120H; SAA7121H
Table 12 Subaddresses 5BH and 5DH
DATA BYTE
DESCRIPTION
GAINU
variable gain for
C_B signal; input
representation in
accordance with
“CCIR 601”
CONDITIONS
white-to-black = 92.5 IRE
GAINU = 0
GAINU = 118 (76H)
white-to-black = 100 IRE
GAINU = 0
GAINU = 125 (7DH)
REMARKS
GAINU = −2.17 × nominal to +2.16 × nominal
output subcarrier of U contribution = 0
output subcarrier of U contribution = nominal
GAINU = −2.05 × nominal to +2.04 × nominal
output subcarrier of U contribution = 0
output subcarrier of U contribution = nominal
Table 13 Subaddresses 5CH and 5EH
DATA BYTE
DESCRIPTION
GAINV
variable gain for
C_R signal; input
representation in
accordance with
“CCIR 601”
CONDITIONS
white-to-black = 92.5 IRE
GAINV = 0
GAINV = 165 (A5H)
white-to-black = 100 IRE
GAINV = 0
GAINV = 175 (AFH)
REMARKS
GAINV = −1.55 × nominal to +1.55 × nominal
output subcarrier of V contribution = 0
output subcarrier of V contribution = nominal
GAINV = −1.46 × nominal to +1.46 × nominal
output subcarrier of V contribution = 0
output subcarrier of V contribution = nominal
Table 14 Subaddress 5DH
DATA BYTE
BLCKL
DECOE
DESCRIPTION
variable black level; input
representation in
accordance with
“CCIR 601”
real-time control
CONDITIONS
white-to-sync = 140 IRE;
note 1
BLCKL = 0; note 1
BLCKL = 63 (3FH); note 1
white-to-sync = 143 IRE;
note 2
BLCKL = 0; note 2
BLCKL = 63 (3FH); note 2
logic 0
logic 1
REMARKS
recommended value: BLCKL = 42 (2AH)
output black level = 34 IRE
output black level = 54 IRE
recommended value: BLCKL = 35 (23H)
output black level = 32 IRE
output black level = 52 IRE
disable odd/even field control bit from RTCI
enable odd/even field control bit from RTCI
(see Fig.9)
Notes
1. Output black level/IRE = BLCKL × 2/6.29 + 34.0.
2. Output black level/IRE = BLCKL × 2/6.18 + 31.7.
2002 Oct 11
14