
Philips Semiconductors
PNX15xx Series
Volume 1 of 1
Chapter 19: Memory Based Scaler
PNX15XX_SER_3
Koninklijke Philips Electronics N.V. 2006. All rights reserved.
Product data sheet
Rev. 3 — 17 March 2006
19-24
31:29
VSP_PHASE_MODE[2:
0]
R/W
0
Phase mode
0: 64 phases
1: 32 phases
2: 16 phases
3: 8 phases
4: 4 phases
5: 2 phases
6: xed phase
7: linear phase interpolation (only valid for4 component mode)
28
Reserved
27:26
VSP_FIR_COMP[1:0]
R/W
Vertical lter components
00: two components, 6 tap FIR each1
01: reserved
10: three components, 4 tap FIR each
11: four components, 3 tap FIR each
1 Filter lengths differ when in de-interlacing mode.
25:20
Reserved
19: 0
VSP_ZOOM_0[19:0]
R/W
0
Initial zoom for 1st pixel in line (unsigned, LSB = 2-16)
2 0000 (hex): downscale 50%
1 0000 (hex): no scaling = 2 0
0 8000 (hex): zoom 2 x
Offset 0x10 C244
Phase Control
31
Reserved
-
30:28
VSP_QSHIFT[2:0]
R/W
0
Quantization shift control
Used to change quantization before being multiplied with 0.5.
100 (bin): divide by 16
101 (bin): divide by 8
110 (bin): divide by 4
111 (bin): divide by 2
000 (bin): multiply by 1
001 (bin): multiply by 2
010 (bin): multiply by 4
011 (bin): multiply by 8
27:26
Reserved
-
25
VSP_QSIGN
R/W
0
Quantization sign bit
24:21
VSP_LDIFF_C[3:0]
R/W
0
Line offset for chroma line count (signed, needed for slicing only)
20
Reserved
-
19:14
VSP_OFFSET_C[12:8]
-
Initial start offset for chroma DTO
(Used for 4:2:0 scaling and de-interlacing only.)
13: 0
VSP_OFFSET_0[12:0]
R/W
0
Initial start offset for DTO
Offset 0x10 C248
Initial Zoom delta
31:26
Reserved
25: 0
VSP_DZOOM_0[25:0]
R/W
0
Initial zoom delta for 1 pixel in line (signed, LSB = 2-27)
Used for non-constant scaling ratios.
Offset 0x10 C24C
Zoom delta change
Table 8: Memory Based Scaler (MBS) Registers …Continued
Bit
Symbol
Acces
s
Value
Description