ADV7183ABST datasheet(39/104 Pages) AD

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ADV7183A

Rev. A | Page 39 of 104

PAL Comb Filter Settings

Used for PAL-B/G/H/I/D, PAL-M, PAL-Combinational N, PAL-

60 and NTSC443 CVBS inputs.

PSFSEL[1:0] Split Filter Selection PAL (SDP),

Address 0x19, [1:0]

The NSFSEL[1:0] control selects how much of the overall signal

bandwidth is fed to the combs. A wide split filter selection

eliminates dot crawl, but shows imperfections on diagonal lines.

The opposite is true for selecting a narrow bandwidth split filter.

Table 86. PSFSEL Function

PSFSEL[1:0]

Description

Narrow

01*

Medium

Wide

Widest

*Default value.

CTAPSP[1:0] Chroma Comb Taps PAL (SDP),

Address 0x39, [7:6]

Table 87. CTAPSP Function

CTAPSP[1:0]

Description

Do not use.

PAL chroma comb adapts 5 lines (3 taps) to

3 lines (2 taps); cancels cross luma only.

PAL chroma comb adapts 5 lines (5 taps) to

3 lines (3 taps); cancels cross luma and hue error

less well.

11*

PAL chroma comb adapts 5 lines (5 taps) to

4 lines (4 taps); cancels cross luma and hue error

well.

*Default value.

CCMP[2:0] Chroma Comb Mode PAL (SDP), Address 0x39, [5:3]

Table 88. CCMP Function

CCMP[2:0]

Description

Adaptive 3-line chroma comb for CTAPSP = 01.

Adaptive 4-line chroma comb for CTAPSP = 10.

0xx*

Adaptive comb mode.

Adaptive 5-line chroma comb for CTAPSP = 11.

100

Disable chroma comb.

Fixed 2-line chroma comb for CTAPSP = 01.

Fixed 3-line chroma comb for CTAPSP = 10.

101

Fixed chroma comb (top lines of line memory).

Fixed 4-line chroma comb for CTAPSP = 11.

Fixed 3-line chroma comb for CTAPSP = 01.

Fixed 4-line chroma comb for CTAPSP = 10.

110

Fixed chroma comb (all lines of line memory).

Fixed 5-line chroma comb for CTAPSP = 11.

Fixed 2-line chroma comb for CTAPSP = 01.

Fixed 3-line chroma comb for CTAPSP = 10.

111

Fixed chroma comb (bottom lines of line memory).

Fixed 4-line chroma comb for CTAPSP = 11.

*Default value.

YCMP[2:0] Luma Comb Mode PAL (SDP), Address 0x39, [2:0]

Table 89. YCMP Function

YCMP[2:0]

Description

0xx*

Adaptive comb mode .

Adaptive 5 lines (3 taps) luma comb.

100

Disable luma comb.

Use low-pass/notch filter; see the Y Shaping Filter section.

101

Fixed luma comb (top lines of line memory).

Fixed 3 lines (2 taps) luma comb.

110

Fixed luma comb (all lines of line memory).

Fixed 5 lines (3 taps) luma comb.

111

Fixed luma comb (bottom lines of line memory).

Fixed 3 lines (2 taps) luma comb.

*Default value.

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