Matrox Meteor-II /Standard grab section
35
Performance
The video timing parameters supported by the Matrox Meteor-II /Standard board
are as follows:
Input channels
Matrox Meteor-II /Standard for PCI and PC/104
-Plus
can switch between up to
twelve independent composite or six Y/C video sources.
Matrox Meteor-II /Standard for CompactPCI can switch between seven
independent composite sources, or up to three Y/C video sources.
You can only acquire data from one channel at a time. A channel is selected with
the MIL-Lite command,
MdigChannel()
.
Low-pass filter
The input low-pass filtering stage is used to limit high frequency noise and aliasing
effects at the input of the decoder. The filter used on Matrox Meteor-II /Standard
for PCI and CompactPCI is a 4th order Butterworth filter with a cutoff frequency
of 8 MHz. The filter used on Matrox Meteor-II /Standard for PC/104
-Plus
is a
single-order filter with a cutoff frequency of 6 MHz.
Video decoder
A multi-standard video decoder is used to convert NTSC and PAL analog video
signals that are composite (CVBS) or component (Y/C) to digitized component
video. The decoder supports RGB 8:8:8 (24-bit), RGB 5:6:5, YUV 4:2:2, and
YUV 4:1:1 output pixel formats. Note that YUV 4:2:2 output pixel formats are
grabbed as YUYV.
CCIR 601 sampling rates
Square pixel sampling rates
NTSC
PAL
NTSC
PAL
Field rate (Hz)
60
50
60
50
Pixel/line (Pixels)
858
864
780
944
Active pixel/line (Pixels)
720
720
640
768
Active lines/frame (Lines)
480
580
480
580
Pixel rate (MHz)
13.5
13.5
12.27
14.75
ADC sampling rate (MHz)
27
27
24.54
29.50
Line rate (KHz)
15.750
15.625
15.750
15.625
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