Sensoray 2255 - Manual (Page 5)

Introduction
Model 2255 is a USB video capture device (frame grabber). It converts the signal from 4 analog
video sources (NTSC or PAL) into a digital format (uncompressed or JPEG) and transfers the result
to the host computer’s RAM via a high-speed USB 2.0 interface. Model 2255 is powered through
the USB port and does not require any external power supplies.
Feature Summary
• Simultaneous capture from 4 composite video sources
• Total capture rate of 60 frames/sec from all channels for NTSC color video – 2 channels at
30 frames/sec each, or 4 channels at 15 frames/sec each
• Capture of JPEG compressed images
• Full frame rate capture on all channels in monochrome or scaled down modes
•
Multiple output formats and resolutions
•
Advanced deinterlacing of interlaced video eliminates motion artifacts
•
Powered through USB
•
Easy to use API; multiple units supported by the driver
•
Windows and Linux support
Specifications
Inputs 4 composite (BNC), 75 Ohm
Input video formats NTSC (M), PAL (BDGHIMN)
Output formats RGB packed (24 bits/pixel, bitmap compatible);
YCrCb packed (16 bits/pixel, YUY2 compatible);
YCrCb planar (16 bits/pixel, optimal for image processing);
Y8 (8 bits/pixel, monochrome);
JPEG
1
Output resolutions 320x240, 640x480, 640x240 (NTSC)
352x288, 704x576, 704x288 (PAL)
2
Capture rate 60 full size color frames per second (from all channels combined,
NTSC) (50 for PAL).
120 full size monochrome or smaller size color frames per second
(from all channels combined, NTSC) (100 for PAL).
Same rates apply to JPEG capture.
Power +5 V, 470 mA (through USB port)
1 JPEG capture requires a special driver component which is sold separately. The regular software
package includes an evaluation version of the driver which overlays a black bar across the
captured image. Please contact Sensoray’s sales for a full version of the driver.
2 The NTSC capture formats are square pixel, PAL are not.
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