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SENSORAY Model 812 8-channel frame grabber

SENSORAY Model 812 8-channel frame grabber


  • 8 channel frame grabber, with 8-channel mono audio capture
  • NTSC and PAL compatible
  • 8 composite video inputs
  • 8 mono audio inputs
  • 8 general-purpose digital inputs/outputs, for camera control
  • PCI-Express x1 interface

SENSORAY's Model 812 is a PCI-Express board that simultaneously captures up to eight composite video and eight mono audio signals. Uncompressed video is captured from each video input at full frame rate (30 fps NTSC; 25 fps PAL), resulting in an aggregate frame rate of up to 240 fps (NTSC) or 200 fps (PAL). The board's compact size and single-lane (x1) PCI-Express interface enable it to be plugged into any PCI-Express slot. Its high channel count, simultaneous capture capability, and small footprint make this board a good fit for surveillance and other applications requiring multi-channel vision, image processing, and A/V recording.

A variety of video capture resolutions are supported, including D1, VGA, QVGA, CIF, 4CIF, SIF, and 4SIF. The captured frame format can be YUYV, UYVY, RGB555, or RGB565.

Audio may be sampled at 8K, 16K, 32K, 44.1K, or 48K Hz.

Digital I/Os
Eight general-purpose digital I/O (DIO) signals are provided for applications such as camera control, status indication, and host signaling. The TTL/CMOS-compatible DIOs can be collectively configured in groups of four to function as inputs or outputs (e.g., 8 in, 8 out, or 4 in/4 out). External circuitry may be connected to the the DIOs through a small terminal block located on the board's rear edge, or to the board's 34-pin header.

Two DB15 connectors are available to convey audio/video signals through the board's mounting bracket; one DB15 conveys the video inputs and the other DB15 conveys audio inputs. A 34-pin header is also provided as an alternative to the DB15 connectors, which allows all video, audio and DIO signals to be connected using a single cable.

Sensoray's 812C1 cable (shown above) breaks out a single DB15 connector onto eight BNC connectors. One 812C1 cable is included with the board, which can be used to connect either eight video or eight audio signals to the board. For both audio and video capture, an additional 812C1 cable must be purchased separately, or the 34-pin header may be used.

Software Development Kits (SDKs) are available for Linux and Windows. The SDKs include drivers, programming samples, and documentation to enable developers to quickly start and create custom applications for the board.


Video Formats NTSC, PAL
Video Inputs 8 composite, 75 Ohms, captured simultaneously:
via DB15 or 34-pin header
Audio Inputs 8 mono, line level (±1.0V), captured simultaneously:
via DB15 or 34-pin header
Video Capture Mode Raw: YUYV, UYVY, RGB555, or RGB565
Video Capture Rate Up to 240 NTSC fps (30x8) or 200 PAL fps (25x8)
* See Maximum Channels vs. Maximum Frame Rate chart below for details
Resolution Supported:
D1.NTSC: 720x480, D1.PAL: 720x576
SIF: 352x240, 2SIF: 704x240, 4SIF: 704x480
VGA: 640x480, QVGA: 320x240, QQVGA: 160x120
CIF: 352x288, QCIF: 176x144, SQCIF: 128x96, 4CIF: 704x576
Audio Sampling Rate 8K, 16K, 32K, 44.1K, 48K Hz
Digital I/O TTL/CMOS compatible
Configurable as 8 inputs, 8 outputs, or 4 inputs + 4 outputs
Connections via 34-pin header or terminal block
Bus PCI-Express x1, compliant to PCI-Express Base Specification (Revision 1.1/2.0)
OS Platform Linux and Windows
Power 825mW, +3.3 V @ 250 mA
Temperature -40 to +85 °C
Board Size 4.1" x 3.9" (105 x 100 cm)

Maximum Channels vs. Maximum Frame Rate

Sensoray bundles the chipset manufacturer'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 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 modern PC/Server. In most cases these performance levels will be enhanced when using higher performance host computers.

Maximum Channels vs. maximum Frame Rate Performance

DriverActive Video ChannelsResolutionFrames/Second/Channel
Linux 1 - 8 VGA, 4SIF/4CIF, D1, or under 30 25
Windows 1 - 4 VGA, 4SIF/4CIF, D1, or under 30 25
5 - 8 QVGA, SIF, CIF, or under 30 25
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