Description
Model 2412 is a complete video server streaming solution.  It converts analog video into digital data, compresses it into MPEG format and transmits it via Ethernet using the UDP or RTP protocol.  The 2412 has options to record video clips that may be played back locally on the 2412 or viewed remotely via Ethernet. More sophisticated versions can process four video streams simultaneously. Since the 2412 is bi-directional, it can accept an Ethernet stream from another 2412 and convert the encoded digital video into composite video outputs.

Hardware Decoding
Although it is possible to use 2412 hardware to decode MPEG data, the  hardware’s latency is 5 seconds. Sensoray’s Display & Control software enables latency under one second.

Software Decoding
If the 2412 is programmed to stream data using the RTP protocol then Apple Computer's QuickTime stream player may be used.

Sensoray’s Display & Control software allows viewing multiple image streams in near real-time on Windows systems. It has less than one second of latency, which allows accurate camera adjustments.

Two versions of the stream player are for sale. One is a stand-alone Windows program and the other is a DLL for embedded systems. The viewer allows stopping the display on a single frame for viewing or printing. The image stream may also be sent to a disk file.

Software and Manuals
2412 Instruction Manual >> Released 11/7/02

Figure 3. 2412/16 Sequential camera selection using one Frame grabber

Using the 2412 sequential camera selection is a low cost, low power option.

Ethernet Protocols
The UDP format (user datagram protocol) offers the fastest data rates and minimum CPU usage at the expense of minimal error checking.  The 2412-4 can uni-cast four MPEG2 data streams at full frame rates when using this protocol.

A disadvantage of the UDP format is that it cannot be played using popular stream players such as QuickTime. However, the latency i.e., the time delay between recording and displaying, while using these players, can be several seconds. 

Camera Control
The 2416's CPU sends pan, tilt and zoom command from the Ethernet to one of the RS-232 ports. Many cameras use serial ports for position control. PZT software is included for popular camera assemblies such as Sony (Visca), Pelco (D protocol) and Cohu (iDome).

To facilitate camera adjustment the digitized video can be looped back to the composite video output for viewing on a TV monitor. This is the default mode for the video output.

Embedded Linux
The board set is supplied with specially configured Linux for high reliability and fast response. After power is applied, the software is automatically loaded to RAM from flash memory. The 2412 will then stream MPEG data to the Ethernet port.

Sensoray has optimized Linux installation for the 301-6 CPU. Although it is possible to recompile the Linux kernel, Sensoray does not offer technical support for this operation

Breakout board 2400TA
This termination board offers a convenient means of connecting signals to the circular connectors on a 2412SYS. It provides DB-9 connectors for the serial ports, an RJ-45 connector for the Ethernet port and coax connectors for the video. A line-operated 24VDC power supply, model 208 and two interconnecting cables are supplied. These connect the 2400TA to one of three types of 2412's: model 2412SYS, 2412 card stack and 2412SYS-Mini. Click here to view image
 

Sensoray Company Inc.  | 7313 SW Tech Center Drive  | Tigard, OR 97223  | p. 503.684.8005  | f. 503.684.8164

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Model 2416 with increased expansion. This larger size enclosure is designed for four MPEG channels and one 340-11b/1 wireless option. It has special thermal features that allow using an internal 20-watt power supply and 500 mW RF amplifier. Optional storage media must be added for DVR operation.

Typical expansion configuration
CPU >> 301-6L with Linux, web server
Frame grabber >> Up to four 516’s
Wireless option >> 340-11b/1 board, 2400P antenna, 2400PM pole mount kit
PC/104 boards >> Six maximum

Prices

Figure 12. 2416 with expansion option