PNX17XX Datasheet, PDF (605/832 Pages) NXP Semiconductors – Connected Media Processor

Philips Semiconductors
Volume 1 of 1
PNX17xx Series
Chapter 19: Memory Based Scaler
Table 8: Memory Based Scaler (MBS) Registers …Continued
Bit Symbol
19: 0 HSP_ZOOM_0[19:0]
Acces
s
R/W
Value
0
Description
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 overflow 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: 0 ≤ m < 1.0 . Instead of using values in the range of
m < 0.5 the quantization shift HSP_QSHIFT should be modified 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
31:30 Unused
Color space matrix coefficients C₀₀ - C₀₂
-
29:20 CSM_C02[9:0]
R/W 0
Coefficient C02, two’s complement
19:10 CSM_C01[9:0]
R/W 0
Coefficient C01, two’s complement
9:0 CSM_C00[9:0]
R/W 0
Coefficient C00, two’s complement
PNX17XX_SER_1
Preliminary data sheet
Rev. 1 — 17 March 2006
© Koninklijke Philips Electronics N.V. 2006. All rights reserved.
19-22