TVP5160
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SLES135E–FEBRUARY 2005–REVISED APRIL 2011
Table 3-12. Luminance Processing Control 3
Subaddress 08h
Default
00h
7
6
5
4
3
2
1
0
Reserved
Trap filter select [1:0]
Trap filter select[1:0] selects one of the four trap filters to produce the luminance signal by removing the chrominance signal from the
composite video signal. The stop band of the chroma trap filter is centered at the chroma subcarrier frequency with stopband bandwidth
controlled by the two control bits. Changing this register will trade luma resolution for dot crawl.
Trap filter stop band bandwidth (MHz):
Filter select [1:0]
NTSC ITU-R 601
1.2129
PAL ITU-R 601
1.2129
00 (default)
01
10
11
0.8701
0.8701
0.7183
0.7383
0.5010
0.5010
Table 3-13. Luminance Brightness
Subaddress 09h
Default
80h
7
6
5
4
3
2
1
0
Brightness [7:0]
Brightness [7:0]: This register works for CVBS and S-Video luminance. See subaddress 2Fh.
0000 0000 = 0 (dark)
1000 0000 = 128 (default)
1111 1111 = 255 (bright)
For composite and S-Video outputs, the output black level relative to the nominal black level (64 out of 1024) as a function of the
Brightness[7:0] setting is as follows.
Black Level = nominal_black_level + (MB + 1) × (Brightness[7:0] - 128)
Where MB is the brightness multiplier setting in the Brightness and Contrast Range Extender register at I2C subaddress 2Fh.
Table 3-14. Luminance Contrast
Subaddress 0Ah
Default
80h
7
6
5
4
3
2
1
0
Contrast [7:0]
Contrast [7:0]: This register works for CVBS and S-Video luminance. See subaddress 2Fh.
0000 0000 = 0 (minimum contrast)
1000 0000 = 128 (default)
1111 1111 = 255 (maximum contrast)
For composite and S-Video outputs, the total luminance gain relative to the nominal luminance gain as a function of the Contrast [7:0]
setting is as follows.
Luminance Gain = (nominal_luminance_gain) × [Contrast[7:0] / 64 / (2^MC) + MC - 1]
Where MC is the contrast multiplier setting in the Brightness and Contrast Range Extender register at I2C subaddress 2Fh.
Copyright © 2005–2011, Texas Instruments Incorporated
Internal Control Registers
47
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