|Model 812 | 8-Channel Frame Grabber|
Sensoray Model 812 is an 8-channel PCI-Express frame grabber that can simultaneously capture 8 channels of NTSC/PAL video, plus optional 8 channels of mono audio. Each video channel captures at full frame rate 30 fps (for NTSC) or 25 fps (for PAL), which results in an aggregate frame rate of up to 240 fps (for NTSC) or 200 fps (for PAL). The board implements a single-lane (x1) PCI-Express interface that enables it to be plugged into any width of PCI-Express slots. All operating power is supplied from the PCI-Express bus and no external power supply is needed.
All 8 composite video inputs are connected through a DB15 connector with a DB15-to-BNC breakout cable, an additional 34-pin connector can be used for breaking out the composite video input signals. The video capture resolution can be chosen from D1, VGA, QVGA, CIF, 4CIF, SIF, 4SIF, etc. Captured frames could be in YUYV, YUV420, or RGB555/RGB565 formats.
All 8 mono audio inputs can be connected through a second DB15 connector with an optionally supplied DB15-to-BNC breakout cable. The 34-pin connector can be used for breaking out the audio input signals. The audio sampling rate could be at 8K, 16K, 32K, 44.1K, or 48K Hz.
Eight general-purpose digital I/O (DIO) signals are provided for camera control, status indication, or alarming, etc. They can be configured to function as inputs or outputs.
One model 812C1 cable (shown in image above) is included with model 812, which can be used to connect eight video signals or eight audio signals to the board. In applications that require both audio and video inputs, an additional 812C1 cable should be purchased separately.
Software Development Kits (SDK) are available for Linux and Windows. The SDKs include drivers, programming samples, and comprehensive documentation to help users/programmers to quickly start and develop custom applications using the Model 812.
Sensoray Model 812 is ideally suited for video surveillance applications in which all video inputs receive continuous video from cameras that employ the same NTSC/PAL video system. However, it can be used for all other multi-channel vision, image processing, and video capturing/recording applications. To get better multi-channel preview performance on PCs with an Intel chipset a plug-in graphic video card might be needed.
One model 812C1 cable (shown in image below) is included with model 812, which can be used to connect eight video signals or eight audio signals to the board. In applications that require both audio and video inputs, an additional 812C1 cable should be purchased separately.
* See Model 812 Hardware Manual for current A/V channel order
Maximum Channels vs. Maximum Frame Rate
Sensoray bundles chipset supplier's drivers with Model 812 for both Linux and Windows. The Linux driver is a high performance driver that makes possible simultaneous full frame rate capture at D1 resolution from all eight input channels. The Windows driver, however, has lower performance that may require tradeoffs between the number of active channels, resolution, and frame rate.
The following table shows the Maximum Channel vs. Maximum Frame Rate that will reliably result in error-free performance on a typical reasonably-new PC/Server. In most cases these performance levels will be enhanced when using higher performance host computers.
Maximum Channels vs. maximum Frame Rate Performance