SAA7108AE Datasheet, PDF (73/208 Pages) NXP Semiconductors – HD-CODEC

NXP Semiconductors
SAA7108AE; SAA7109AE
HD-CODEC
Table 25. Example of XACL[5:0] usage
Prescale
ratio
XPSC Recommended values
[5:0] _{For lower bandwidth requirements}
XACL[5:0] XC2_1
XDCG[2:0]
1
1
0
0
0
1_⁄2
2
2
1
2
(1 2 1) × ¹â„_4[1]
1_⁄3
3
4
1
3
(1 2 2 2 1) × ¹â„_8[1]
1_⁄4
4
7
0
3
(1 1 1 1 1 1 1 1) × ¹â„_8[1]
1_⁄5
5
8
1
4
(1 2 2 2 2 2 2 2 1) × ¹â„_16[1]
1_⁄6
6
8
1
4
(1 2 2 2 2 2 2 2 1) × ¹â„_16[1]
1_⁄7
7
8
1
4
(1 2 2 2 2 2 2 2 1) × ¹â„_16[1]
1_⁄8
8
15
0
4
(1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1) × ¹â„_16[1]
1_⁄9
9
15
0
4
(1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1) × ¹â„_16[1]
1_⁄10
10
16
1
5
(1 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 1) × ¹â„_32[1]
1_⁄13
13
16
1
5
1_⁄15
15
31
0
5
1_⁄16
16
31
0
5
1_⁄19
19
32
1
6
1_⁄31
31
32
1
6
1_⁄32
32
63
1
7
1_⁄35
35
63
1
7
For higher bandwidth requirements
XACL[5:0] XC2_1
XDCG[2:0]
FIR prefilter
PFY[1:0]/
PFUV[1:0]
0
0
0
0 to 2
1
0
1
0 to 2
(1 1) × ¹â„_2[1]
3
0
2
2
(1 1 1 1) × ¹â„_4[1]
4
1
3
2
(1 2 2 2 1) × ¹â„_8[1]
7
0
3
2
(1 1 1 1 1 1 1 1) × ¹â„_8[1]
7
0
3
3
(1 1 1 1 1 1 1 1) × ¹â„_8[1]
7
0
3
3
(1 1 1 1 1 1 1 1) × ¹â„_8[1]
8
1
4
3
(1 2 2 2 2 2 2 2 1) × ¹â„_16[1]
8
1
4
3
(1 2 2 2 2 2 2 2 1) × ¹â„_16[1]
8
1
4
3
(1 2 2 2 2 2 2 2 1) × ¹â„_16[1]
16
1
5
3
16
1
5
3
16
1
5
3
32
1
6
3
32
1
6
3
32
1
6
3
63
1
7
3
[1] Resulting FIR function.
9.3.2.2
Horizontal fine scaling (variable phase delay filter; subaddresses A8h to AFh and
D8h to DFh)
The horizontal fine scaling (VPD) should operate at scaling ratios between ¹â„₂ and 2
(0.8 and 1.6), but can also be used for direct scaling in the range from ¹â„_7.999 to
(theoretical) zoom 3.5 (restriction due to the internal data path architecture), without
prescaler.
In combination with the prescaler a compromise between sharpness impression and alias
can be found. This is signal source and application dependent.
For the luminance channel a filter structure with 10 taps is implemented, for the
chrominance a filter with 4 taps.
SAA7108AE_SAA7109AE_3
Product data sheet
Rev. 03 — 6 February 2007
© NXP B.V. 2007. All rights reserved.
73 of 208