2000 Mar 15
95
Philips Semiconductors
Preliminary specication
PAL/NTSC/SECAM video decoder with adaptive PAL/NTSC
comb lter, VBI-data slicer and high performance scaler
SAA7114H
15.2.10 SUBADDRESS 09H
Table 46 Luminance control; 09H[7:0]
15.2.11 SUBADDRESS 0AH
Table 47 Luminance brightness control: decoder part; 0AH[7:0]
BIT
DESCRIPTION
SYMBOL VALUE
FUNCTION
D7
chrominance trap/comb lter
bypass
BYPS
0
chrominance trap or luminance comb lter active;
default for CVBS mode
1
chrominance trap or luminance comb lter bypassed;
default for S-video mode
D6
adaptive luminance comb lter
YCOMB
0
disabled (= chrominance trap enabled, if BYPS = 0)
1
active, if BYPS = 0
D5
processing delay in non comb
lter mode
LDEL
0
processing delay is equal to internal pipelining delay
1
one (NTSC standards) or two (PAL standards) video
lines additional processing delay
D4
remodulation bandwidth for
luminance; see Figs 12 to 15
LUBW
0
small remodulation bandwidth
(narrow chroma notch
higher luminance bandwidth)
1
large remodulation bandwidth
(wider chroma notch
smaller luminance bandwidth)
D[3:0] sharpness control, luminance
lter characteristic; see Fig.16
LUFI[3:0]
0001
resolution enhancement lter 8.0 dB at 4.1 MHz
0010
resolution enhancement lter 6.8 dB at 4.1 MHz
0011
resolution enhancement lter 5.1 dB at 4.1 MHz
0100
resolution enhancement lter 4.1 dB at 4.1 MHz
0101
resolution enhancement lter 3.0 dB at 4.1 MHz
0110
resolution enhancement lter 2.3 dB at 4.1 MHz
0111
resolution enhancement lter 1.6 dB at 4.1 MHz
0000
plain
1000
low-pass lter 2 dB at 4.1 MHz
1001
low-pass lter 3 dB at 4.1 MHz
1010
low-pass lter 3 dB at 3.3 MHz; 4 dB at 4.1 MHz
1011
low-pass lter 3 dB at 2.6 MHz; 8 dB at 4.1 MHz
1100
low-pass lter 3 dB at 2.4 MHz; 14 dB at 4.1 MHz
1101
low-pass lter 3 dB at 2.2 MHz; notch at 3.4 MHz
1110
low-pass lter 3 dB at 1.9 MHz; notch at 3.0 MHz
1111
low-pass lter 3 dB at 1.7 MHz; notch at 2.5 MHz
OFFSET
CONTROL BITS D7 TO D0
DBRI7
DBRI6
DBRI5
DBRI4
DBRI3
DBRI2
DBRI1
DBRI0
255 (bright)
11111111
128 (ITU level)
10000000
0 (dark)
00000000