
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
19-22
19: 0
HSP_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 = 100%
0 8000 (hex): zoom 2 x (transposed: downscale 50%)
Offset 0x10 C204
Phase Control
31
Reserved
-
30:28
HSP_QSHIFT[2:0]
R/W
0
Quantization shift control
Used to change quantization before being multiplied with
HSP_MULTIPLY.
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
Warning: A value range overow caused by an improper
quantization shift can not be compensated later by multiplying with a
HSP_MULTIPLY value below 0.5!
27:26
Reserved
-
25
HSP_QSIGN
R/W
0
Quantization sign bit
24:16
HSP_QMULTIPLY[8:0]
R/W
0
Quantization multiply control
Used to compensate for different weight sums in transposed
polyphase or color space matrix mode, remaining bits are fractions
(largest number is 511/512)
Value range:
. Instead of using values in the range of
the quantization shift HSP_QSHIFT should be modied to
gain more precision in the truncated result.
15:13
Reserved
-
12: 0
HSP_OFFSET_0
R/W
0
Initial start offset for DTO
Offset 0x10 C208
Initial Zoom delta
31:26
Reserved
25: 0
HSP_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 C20C
Zoom delta change
31:29
Reserved
-
28: 0
HSP_DDZOOM[28:0]
R/W
0
Zoom delta change (signed, LSB = 2-40)
used for non constant scaling ratios
Color Space Matrix Registers
Offset 0x10 C220
Color space matrix coefcients C00 - C02
31:30
Unused
-
29:20
CSM_C02[9:0]
R/W
0
Coefcient C02, two’s complement
19:10
CSM_C01[9:0]
R/W
0
Coefcient C01, two’s complement
9:0
CSM_C00[9:0]
R/W
0
Coefcient C00, two’s complement
Table 8: Memory Based Scaler (MBS) Registers …Continued
Bit
Symbol
Acces
s
Value
Description
0
m
1.0
<
≤
m
0.5
<