Sensoray 2480 - Manual (Page 4)

2480 Instruction Manual 2 Introduction
Introduction
Sensoray’s Model 2480 is an Ethernet based video capture
system that simultaneously processes up to 16 analog video
inputs. The system is capable of capturing JPEG-compressed
images from all 16 channels in real time at full NTSC or PAL
frame rates. Each video input signal is converted to Motion
JPEG (MJPEG) and then streamed out over Ethernet. A 16x4
crosspoint switch enables any input signal to be routed to any
of four video outputs.
The unit communicates with one or more network clients by
means of standard network protocols. Configuration settings
and system operation can be managed through the module’s
HTTP server, enabling manual control and diagnostics access
from any web browser. A telnet server enables the system to be
controlled by a custom, client-side automation application.
Standard BNC connectors are provided for connecting the unit
to analog video signals. The system is housed in a 1U, 19-inch
rackmount enclosure and is powered from 120VAC.
2.1 Video Inputs
Capture parameters can be set independently for each video
input channel. For example, each input channel can be
individually configured to accept NTSC or PAL.
Each analog video input is first converted to uncompressed
digital video. The resulting digital video frames are optionally
scaled and frame rate decimated. A single-line text caption of
up to 80 characters may be overlaid onto the scaled images for
on screen display (OSD). The resulting composite images are
compressed to MJPEG. After encoding, the elementary video
stream is framed and encapsulated as required by the target
network streaming protocol.
2.2 Video Outputs
A 16x4 analog crosspoint video switch can be used to route
any combination of four input channels to external video
monitors. Each of the four video outputs can be individually
turned on or off to enable multiple outputs, or even multiple
2480s, to share output connections to a common monitor.
Figure 1: Block Diagram
Network
Interface
Video
Decoder Caption
Overlay MJPEG
Encoder Protocol
Formatter Stream
Server
16 x 4
Crosspoint
16
Ethernet
Video
Outputs
NTSC/PAL
Video Inputs
Scale/
Decimate
Video
Decoder Caption
Overlay MJPEG
Encoder Protocol
Formatter Stream
Server
2
Scale/
Decimate
Video
Decoder Caption
Overlay MJPEG
Encoder Protocol
Formatter Stream
Server
3
Scale/
Decimate
Video
Decoder Caption
Overlay MJPEG
Encoder Protocol
Formatter Stream
Server
4
Scale/
Decimate
Video
Decoder Caption
Overlay MJPEG
Encoder Protocol
Formatter Stream
Server
1
Scale/
Decimate