Matrox CronosPlus, Установка и справочник по оборудованию

Страница: 23 / 48

Grab features 23
Grab features
The Matrox CronosPlus board is equipped with a video decoder chip that has an
integrated PCI interface. The chip can grab RS-170 /CCIR monochrome video
and composite (CVBS) and component (Y/C) video in NTSC /PAL format.
Performance
The video timing parameters supported by Matrox CronosPlus are as follows:
Input channels
With Matrox CronosPlus, you can only acquire data from one video source at a
time, however you can attach several video sources and switch between them.
The Matrox CronosPlus board can switch between up to four independent
composite/monochrome sources. Alternatively, the board can switch between
1 Y/C and 3 composite/monochrome sources.
To switch between video sources of the same type, allocate a single digitizer (using
the MIL-Lite function
MdigAlloc() ) and switch between the input channels with
(using the MIL-Lite function MdigChannel() ).
To grab and switch between Y/C and composite/monochrome video sources,
allocate two different digitizers: one with a DCF for Y/C video sources and one
with a DCF for composite/monochrome video sources. For each allocated
digitizer, specify the input channel of the required video source using MIL-Lite
function
MdigChannel() ; the channel numbering scheme is based on the number
Square pixel video formats
NTSC PAL
Field rate (Hz) 60 50
Pixel/line (Pixels) 780 944
Active pixel/line (Pixels) 640 768
Active lines/frame (Lines) 480 576
ADC sampling rate (MHz)
27
1
1. Some scaling is applied for conversion of ITU sampling to square pixels.
27
1
Line rate (KHz) 15.734 15.625