2004 Mar 16
157
Philips Semiconductors
Product specification
PC-CODEC
SAA7108E; SAA7109E
18.2.2.10 Subaddress 09H
Table 158
Luminance control; 09H[7:0]
18.2.2.11 Subaddress 0AH
Table 159
Luminance brightness control: decoder part; 0AH[7:0]
BIT
DESCRIPTION
SYMBOL VALUE
FUNCTION
7
chrominance trap/comb filter
bypass
BYPS
0
chrominance trap or luminance comb filter active;
default for CVBS mode
chrominance trap or luminance comb filter bypassed;
default for S-video mode
disabled (= chrominance trap enabled, if BYPS = 0)
active, if BYPS = 0
processing delay is equal to internal pipelining delay
one (NTSC standards) or two (PAL standards) video
lines additional processing delay
small remodulation bandwidth (narrow chrominance
notch
higher luminance bandwidth)
large remodulation bandwidth (wider chrominance
notch
smaller luminance bandwidth)
resolution enhancement filter; 8.0 dB at 4.1 MHz
resolution enhancement filter; 6.8 dB at 4.1 MHz
resolution enhancement filter; 5.1 dB at 4.1 MHz
resolution enhancement filter; 4.1 dB at 4.1 MHz
resolution enhancement filter; 3.0 dB at 4.1 MHz
resolution enhancement filter; 2.3 dB at 4.1 MHz
resolution enhancement filter; 1.6 dB at 4.1 MHz
plain
low-pass filter; 2 dB at 4.1 MHz
low-pass filter; 3 dB at 4.1 MHz
low-pass filter; 3 dB at 3.3 MHz; 4 dB at 4.1 MHz
low-pass filter; 3 dB at 2.6 MHz; 8 dB at 4.1 MHz
low-pass filter; 3 dB at 2.4 MHz; 14 dB at 4.1 MHz
low-pass filter; 3 dB at 2.2 MHz; notch at 3.4 MHz
low-pass filter; 3 dB at 1.9 MHz; notch at 3.0 MHz
low-pass filter; 3 dB at 1.7 MHz; notch at 2.5 MHz
1
6
adaptive luminance comb
filter
YCOMB
0
1
0
1
5
processing delay in non comb
filter mode
LDEL
4
remodulation bandwidth for
luminance; see Figs 20 to 23
LUBW
0
1
3 to 0
sharpness control, luminance
filter characteristic; see
Fig.24
LUFI[3:0]
0001
0010
0011
0100
0101
0110
0111
0000
1000
1001
1010
1011
1100
1101
1110
1111
OFFSET
CONTROL BITS 7 TO 0
DBRI7
DBRI6
DBRI5
DBRI4
DBRI3
DBRI2
DBRI1
DBRI0
255 (bright)
128 (ITU level)
0 (dark)
1
1
0
1
0
0
1
0
0
1
0
0
1
0
0
1
0
0
1
0
0
1
0
0