Sensoray 2246 - Manual (Page 10)

Audio inputs
Any one of three audio sources may be embedded into the MPEG stream. A high-
level microphone signal or stereo audio source is synchronized to the video
streaming during MPEG encoding. The audio stream embedded within the ancillary
data from the HDTV camera can be added to the MPEG stream in place of the
analog sources.
Audio output
Sensoray’s MPEG decoding software that runs on the host PC can decompress the
video and audio.
The 2246 does not directly produce an analog output.
General purpose digital I/O
There are two electromechanical relays each of which has two form-C contacts.
Eight opto-isolated inputs are available for general purpose inputs.
Video Selection
The input’s 5:1 multiplexer allows input selection between one SD/HD-SDI digital
video input, two composite analog inputs, and two sets of S-Video analog video
inputs. This makes it possible to connect up to five video sources to the frame and
video capture.
Image processing
The 2246’s scan converter guarantees the DVI output is synchronized to LCD
displays. Hence, 25 frame/second PAL sources will be displayed at the highest LCD
refresh rate. Real-time image down scaling of the HDTV stream prepares it for
MPEG compression. A second video scaler is available for up or down scaling of
images sent to the LCD display.
Captured images may be annotated with both text and bit-map image sent by the
host via the USB port. Annotated image streams can then be displayed and
compressed to MPEG or motion JPEG standards.
Once selected, the desired video source streams into the host PC via USB 2.0. The
application software allows the capture of color images and video streams into
computer storage. The video stream is hardware compressed into MPEG-1,
MPEG-2, or MPEG-4.
AGC, contrast, saturation is programmable via software control.
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