SAA7118 Datasheet, PDF (121/169 Pages) NXP Semiconductors – Multistandard video decoder with adaptive comb filter and component video input

Philips Semiconductors
Multistandard video decoder with adaptive
comb filter and component video input
Preliminary specification
SAA7118
15.2.10 SUBADDRESS 09H
Table 47 Luminance control; 09H[7:0]
BIT
D7
DESCRIPTION
chrominance trap/comb filter
bypass
D6 adaptive luminance comb filter
D5 processing delay in non comb
filter mode
D4 remodulation bandwidth for
luminance; see Figs 14 to 17
D[3:0] sharpness control, luminance
filter characteristic; see Fig.18
SYMBOL VALUE
FUNCTION
BYPS
0 chrominance trap or luminance comb filter active;
default for CVBS mode
1 chrominance trap or luminance comb filter bypassed;
default for S-video mode
YCOMB
0 disabled (= chrominance trap enabled, if BYPS = 0)
1 active, if BYPS = 0
LDEL
0 processing delay is equal to internal pipelining delay;
recommended setting
1 one (NTSC standards) or two (PAL standards) video
lines additional processing delay
LUBW
LUFI[3:0]
0
1
0001
small remodulation bandwidth
(narrow chroma notch ⇒ higher luminance bandwidth)
large remodulation bandwidth
(wider chroma notch ⇒ smaller luminance bandwidth)
resolution enhancement filter 8.0 dB at 4.1 MHz
0010 resolution enhancement filter 6.8 dB at 4.1 MHz
0011 resolution enhancement filter 5.1 dB at 4.1 MHz
0100 resolution enhancement filter 4.1 dB at 4.1 MHz
0101 resolution enhancement filter 3.0 dB at 4.1 MHz
0110 resolution enhancement filter 2.3 dB at 4.1 MHz
0111 resolution enhancement filter 1.6 dB at 4.1 MHz
0000 plain
1000 low-pass filter 2 dB at 4.1 MHz
1001 low-pass filter 3 dB at 4.1 MHz
1010 low-pass filter 3 dB at 3.3 MHz; 4 dB at 4.1 MHz
1011 low-pass filter 3 dB at 2.6 MHz; 8 dB at 4.1 MHz
1100 low-pass filter 3 dB at 2.4 MHz; 14 dB at 4.1 MHz
1101 low-pass filter 3 dB at 2.2 MHz; notch at 3.4 MHz
1110 low-pass filter 3 dB at 1.9 MHz; notch at 3.0 MHz
1111 low-pass filter 3 dB at 1.7 MHz; notch at 2.5 MHz
15.2.11 SUBADDRESS 0AH
Table 48 Luminance brightness control: decoder part; 0AH[7:0]
OFFSET
255 (bright)
128 (ITU level)
0 (dark)
DBRI7
1
1
0
DBRI6
1
0
0
CONTROL BITS D7 TO D0
DBRI5
1
0
0
DBRI4
1
0
0
DBRI3
1
0
0
DBRI2
1
0
0
DBRI1
1
0
0
DBRI0
1
0
0
2001 May 30
121