
PRELIMINARY DATA SHEET
VPX 3225D, VPX 3224D
76
Micronas
FP-RAM VPX Back-End
Name
Default
Function
Mode
Number
of Bits
Address
Hex
h’126
12
w
Selection for peaking/coring
0
peaking1
bit [1:0]:
coring
subtracts LSBs of the higher frequency part of the video
signal
00: subtract 0 LSBs
01: subtract 1/2 LSB
10: subtract 1 LSB
11: subtract 2 LSBs
bit [4:2]:
peaking
an implemented peaking filter supports sharpness control
with up to eight steps:
000:no peaking
001:low peaking
111: high peaking
bit [5]:
Bypass Lowpass
bit [6]:
Bypass Skewfilter
bit [7]:
Bypass Skewfilter VACT
bit [8]:
Swapping of Chroma values
0
Cb-Pixels first
1
Cr-Pixels first
bit [11:9]:
reserved (must be set to zero)
h’127
12
w
Brightness
0
bit [7:0]:
Brightness Level
offset value added to the video samples
brightness can be selected in 256 steps within the range
–127...128 (binary offset format):
0:
–127
255:128
brightness1
bit [11:8]:
reserved (must be set to zero)
h’128
12
w
Contrast
32
contrast1
bit [5:0]:
Contrast Level
linear scale factor for luminance (default = 1.0)
[5]
integer part
[4:0]fractional part
contr1
bit [7:6]:
Noise Shaping
Control for 10-bit to 8-bit conversion (default: rounding)
00: 9-bit to 8-bit via 1-bit rounding
01: 9-bit to 8-bit via truncation
10: 9-bit to 8-bit via 1-bit accumulation
11: 10-bit to 8-bit via 2-bit accumulation
noise1
bit [8]:
Contrast Brightness: Clamping Level
0
clamping level = 32,
1
clamping level = 16
(should normally be set to 1)
clamp1
bit [9]:
Bypass Brightness Adder
bribyp1
bit [10]:
Bypass Contrast Multiplier
conbyp1
bit [11]:
reserved (must be set to zero)