16-channel JPEG frame grabber | Model 615
- 16 composite video inputs
- Full resolution, full frame rate JPEG compression of NTSC, PAL, SECAM
- 64 character text overlay with automatic time stamp
- Uncompressed, downscaled frames available for external motion detection
Model 615 is obsolete. This archived information is provided as a courtesy to customers who own model 615 units.
Description
Sensoray's Model 615 captures images from its sixteen inputs and performs hardware JPEG compression. The video source can be from non-synchronized cameras, and interlaced frames are buffered before compression. Scaled down uncompressed images are available for visual monitoring and for motion detection by the host computer. The 615's overall throughput is 30 frames per second for NTSC and 25 frames per second for PAL.
The 615 implements a 16x4 crosspoint video switch and uses 4 separate decoders with individual frame buffers. This allows cycling through all 16 input channels at the full capture rate without losing frames during channel switching.
Model 615 block diagram
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.
Caption overlay
A text caption buffer (64 characters), modified on a frame-to-frame basis, may be overlaid on the compressed image. The position of the caption, character size and color are software-controlled. The caption is transparent; only the characters overlay the image. Caption formatting functions available in the software provide an easy way of including date and time stamps.
Compression
Model 615 executes the baseline JPEG compression with the software controlled compression factor. The minimum compression factor results in an image file size of about 50KB for a full resolution NTSC frame. Increasing the compression factor yields smaller files at the expense of image quality.
Frame rates
Each of the four decoders digitizes 30 frames per second to give an overall board throughput of 30 fps for 640x480 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 615 executes hardware JPEG compression to greatly reduce the amount of memory needed to store images. Hardware compression reduces the CPU and PCI bus loading.
Model 817TA distribution amplifier
Model 817TA is an indispensable tool for application development and troubleshooting with Sensoray's 16-channel frame grabbers (Models 615, 617 and 817). Model 817TA takes one standard composite TV video signal (using a BNC connector) and splits it into 16 buffered outputs of standard amplitude and impedance. The outputs are connected to a 34-pin ribbon cable connector standard for the above mentioned frame grabbers. A combination of models 817TA and 609TC, TE or TG yields a splitter with 16 BNC outputs.
Termination boxes
The 615 may be optionally be connected to termination boxes with the flat cable.
Typical application
Specifications
| Capture & JPEG rate | 30 frames/second for 640x480 NTSC
25 frames/second for 704x544 PAL |
| A/D resolution | 9 bits luminance, 9 bits chrominance |
| Video inputs | 16 composite inputs, 75 Ω |
| Video outputs | 4 real-time |
| Hardware compression | JPEG |
| Caption buffer | 64 bytes |
| Digital inputs | 16 TTL compatible |
| Digital outputs | 16 TTL compatible |
| Frame rates | ||
|---|---|---|
| Number of cameras | NTSC frames/second | PAL frames/second |
| 1 | 30 | 25 |
| 2 | 15 | 12.5 |
| 4 | 7.5 | 6.25 |
| 8 | 3.75 | 3.12 |
| 16 | 1.88 | 1.56 |
Model 615 dimensions
Documentation
| File | Version | Date M-D-Y | Type | Size |
|---|---|---|---|---|
| Model 615 Hardware Manual | 1.0.0 | 10-24-19 | 256 KB | |
| Model 615 Software Manual | 1.0.0 | 10-24-19 | 81 KB |
Downloads
| File | Version | Date M-D-Y | Type | Size |
|---|---|---|---|---|
| Model 615 Software Development Kit | 2.5.0 | 10-24-19 | ZIP | 925 KB |
| Model 615 Windows DLL | 2.5.1 | 10-24-19 | ZIP | 28 KB |
| Model 615 Linux | 2.0.0 | 10-24-19 | GZ | 43 KB |
| Other Operating Systems | ||||
| Need a software development kit for another operating system? We can port our SDK to your OS for a NRE fee or, with a volume commitment, at no additional cost. Contact Sales for details. | ||||