In English
Sensoray311 4-x канальный модуль видеозахвата PC/104+ (5V, <1.5W)
Снято с производства
Model 311 | Frame Grabber
Features
High frame rate using the PC/104+ bus
Color or monochrome: PAL, SECAM, NTSC, RS-170 CCIR compatible
Four composite video inputs or three composite and one S-video
Eight TTL I/O lines for camera control
Programmable AGC, hue, contrast, saturation
Optional enhanced SDK for Windows 98/2000/NT/XP/CE
Optional Linux and QNX drivers
Sensoray Model 311 frame grabber converts video camera signals into digital data required for computer image processing and display. Up to four cameras may be connected to the board: four with composite video or three with composite and one with an S-video input. The 311 provides four digital input lines and four output lines to control camera focus, pan, tilt and triggering.
Frame Rate
Model 311 can transfer 30 frames per second with the supplied software. It supports a variety of digital formats including RGB24 and Y8 that are directly compatible with Windows bitmaps.
Synchronization
The Model 311 uses special circuitry to achieve horizontal and subcarrier synchronization to incoming video. It guarantees generation of the required pixel/line from a video source in which line length can vary by several microseconds. This circuitry allows the 311 adapter to quickly and accurately lock on to video signals, regardless of source. Since the technique is completely digital, the 311 can recognize unstable signals caused by VCR head switching and adapt the locking mechanism to accommodate the source.
Image scaling
Under software control the 311 adapter can independently scale the X and Y dimensions of the captured frame. Full-resolution video may be reduced to any size down to the size of an icon. A software selectable digital filter is available to minimize aliasing artifacts induced by scaling.
A/D Conversion
The 311’s signal processor uses two flash analog-to-digital converters; one for chrominance and one for luminance. Each A/D provides 2x over sampling of the camera signal. Over sampling, combined with analog anti-aliasing filters, significantly reduces the overall sensitivity to unwanted aliasing signals and enhances the 311’s digital filtering.
The 311 is capable of sending just the luminance data to the host’s image buffer. This feature speeds
SpecificationsCapture rate 30 frames/sec (NTSC, RS-170, CCIR) | 25 frames/sec (PAL, SECAM)
A/D resolution 8-bits for luminance | 8-bits for chrominance
FIFO size 560 bytes (280 pixels)
Output resolution 768 x 576 (PAL, SECAM) | 640 x 480 (NTSC, RS-170)
Y bandwidth error 0.6 dB
Board size 3.80” x 3.55”
Output format Several
Input power 5 volts at 280 mA
Bus structure PC/104+
Number of cameras NTSC per channel frames/sec PAL per channel frames/sec
1 30 25
2 8 6
3 3 2
4 1 1
