Produto                                    Model 617                Captura                  

JPEG Frame Grabber

Features
30 fps for interlaced NTSC, 25 fps interlaced PAL

16 video inputs, 4 real-time outputs, 32 digital I/O

Full resolution, full frame rate hardware JPEG compression
of NTSC, PAL, SECAM

Text overlay buffer for frame annotation

Lower cost 4-channel 617-4 available

Uncompressed frames available for external motion detection

Click para ampliar foto

Description
Model 617 combines the functions of a 16 x 4 video crosspoint switch, a frame grabber, hardware JPEG compression and digital I/O into one PCI board.

The 617 accepts sixteen composite video inputs and routes any four of them to separate video decoders for digitizing. The use of four decoders eliminates losing frames during channel switching. At least two decoders are always in sync and ready for the JPEG compression circuit.

The 617 uses multiple frame buffers to interlace full size images before they are compressed. This allows the 617 to generate just one compressed image per frame instead of two per interlaced frame.

Frame rates
Each of the four decoders digitizes 30 frames per second to give an overall board throughput of 30 fps for 640 x 480 interlaced frames. These throughputs include JPEG compression. If all sixteen channels are used the frame rate per channel is 1.8 fps.

Hardware compression
Model 617 executes hardware JPEG compression to greatly reduce the amount of memory needed to store images. Hardware compression reduces the CPU and PCI bus loading.

Multiple boards
Sensorayís software supports multiple 617ís in the same PCI bus. For example, two 617ís may be used to expand the number of video inputs to thirty two.

If sixteen inputs are distributed between two boards the overall capture rate increases to 3.7 fps per channel.

Real-time outputs
Any four of the sixteen inputs may be routed to four output channels for display on video monitors. A software-selectable switch after each buffer amplifier allows multiple 617ís to share the same video monitor.

Input Clamping
Each input channel has a clamping circuit to minimize the effects of switching from one floating camera signal to another. Image artifacts from a previous channel will not affect the current channel.

Text caption buffer
The 617ís caption buffer allows overlaying text on each frame. The text is within a transparent box that may be positioned anywhere within the frame. The text size and color are programmable.

Special output
The 617 also supplies small-size uncompressed frames suitable for motion detection by the host computer. These are 128 x 96 pixels or 256 x 192.

4-channel 617-4
Model 617-4 is lower cost version of the 617 with just four video inputs, four real-time video outputs, and 16 digital I/O signals. Video inputs are connected directly to BNCís located on the boardís hold-down bracket. The 617-4 has a faster frame capture rate than the 617.

The overall board throughput is 120 fps for 320 x 240 size frames, 60 fps for 640 x 240 size frames and 30 fps for 640 x 480 interlaced frames.

Signal connections
Several options are available for connecting signals to the 617. Video inputs and two real time outputs may be connected to low-cost break-out cable 617C.

Low-cost video input panels 609TA, 609TC and 609TE connect to the 617 via flat cables. Model 609TE fits into CD drive slot on the front of a PC.

Model 609TA has terminations and surge protection for 16 video inputs, 8 real-time outputs and 32 digital I/O lines. Sixteen of the digital I/O lines are mechanical relays that can be configured as NO or NC circuits. The 609TA may be installed inside a 19-inch enclosure. Its two mounting ears may be attached to the front or back of the box or they may be removed. Up to three flat cables connect the 609TA to the 617.

609TA

609TC

609TE

617C1

Software and Manuals
The 617 is supplied with a software developerís kit, SDK17. It includes drivers for Windows 98/NT/2000/XP. A Linux driver for kernel 2.4.10 is under development. Each kit includes sample application programs. The included software uses the hardware compressed images to make motion JPEG files in the AVI format.  

Figure 1. Typical Application

Figure 2. Model 617 dimensions

Specifications

Capture & JPEG rate

30 fps for 640 x 480 NTSC
25 fps for 704 x 544 PAL

A/D resolution

9-bits luminance
9-bits chrominance

Video inputs

16 composite inputs, 75 ohms

Video outputs

4 real-time

JPEG

Hardware compression

Caption buffer

64 bytes

Digital inputs

16 TTL compatible

Digital outputs

16 TTL compatible

Ordering Informations

Model 617

16 channel frame grabber

   

Model 617-4

4 channel frame grabber

   

Model 609TA

External Termination Box (Optional)

   

Model 609TB

External Termination Box (Optional)

   

Model 609TC

Coax Termination Box (Optional)

   

Model 609TD

Break out Panel (Optional)

   

Model 609TE

Break out Panel (Optional)

   

Model 609C1

16 channel video input, 50cm

   

Model 609C5

16 channel video input, parallel feed

   

Model 609C7-40

16 monitor output, 1 meter

   

Model 7409C1

40 conductor, digital I/O, 1 meter