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Sensoray model 2246 is a USB 2.0 A/V (audio and video) MPEG-1/2/4 (MPEG ISO 14496-2) processor that supports multiple video input formats, including SDI 1080i, 720p, and both SDI and analog NTSC/PAL SD. It compresses video and stereo audio to MPEG-1 system stream, MPEG-2 program stream, or MPEG-4 (AVI), and sends the resulting stream onto USB. At the same time, it can capture uncompressed full-frame snapshots and send them over USB, while it simultaneously generates live or freeze frame video on its four video outputs.
At any time, one HD or SD video source (HD-SDI/SD-SDI, S-Video, or composite) and one audio source is selected for processing. The selected video is copied to three independent overlay generators, which in turn produce three new uncompressed, overlaid video streams. These three video streams are then processed in parallel by the compression engine (along with audio), video output generators, and frame capture subsystems.
Audio may be source from embedded SDI audio, external audio line in, or external microphone signals. Audio can be output to embedded SDI, line out, MPEG stream, or any combination of these.
The compression engine simultaneously compresses SD video and stereo or mono audio. When an HD video source is selected, the overlaid video is downscaled to SD before encoding.
All four video outputs (HD-SDI/SD-SDI, DVI, SVIDEO, and composite) function simultaneously regardless of the video source format. In the case of HD sources, the video is downscaled for compatibility with composite and S-Video outputs. SD sources are upscaled as appropriate for the DVI output. The DVI output, which may be formatted for 1080i, 1024x1280p, or NTSC/PAL resolution, incorporates frame rate conversion to ensure synchronization to standard displays.
A frame buffer is provided to capture uncompressed snapshots of individual frames. Captured frames can be sent over USB concurrently with the video stream, and may also be sent to the video outputs as freeze frame video.
The 2226 sports a zoom feature on the MPEG and DVI output streams. Video can be stretched up to 2.5x horizontally and 5x vertically, with origin moved to any arbitrary position. Video zoom is performed by the scaler blocks.
The unit is available in a robust enclosure (model 2246S) or as a stand-alone board (model 2246) for OEM applications. An optional termination board adapter, Model 2246TA, can be used to conveniently break out connections from Model 2246.
Features:
- Video overlay up to full screen at up to 1920x1080
- SDI (HD/SD) and analog inputs
- DVI, SDI (HD/SD), and analog outputs
- Prescaled SD A/V compression engine with MPEG-1/2/4 output
- Up/downscaling on DVI and analog outputs
- Captures uncompressed HD/SD frames
- Generates "freeze frame" video from captured frames
- Video "zoom" on MPEG stream and DVI output
- Isolated general-purpose digital I/O: 8 in / 4 out
- USB 2.0 interface
Specifications:
- Video Inputs
- HDTV
- 1920 x 1080 SDI
- 1080i 25/30 fps
- Video formats supported
- HDTV: SMPTE 295M, SMPTE 274M, SMPTE 296M
- SD-SDI SMPTE 259M
- HD-SDI SMPTE 292M SDTV SMPTE 125
- SDTV ITU-R BT 601.5
- SDI input specifications
- Serial input data rate (max.): 1.485 Gbps
- Serial input voltage swing (max.): 950 mVpp
- Input impedance: 75 Ω, single ended
- Composite
- NTSC: 640 x 480, 30 fps, ±1 Vpp
- PAL: 704 x 544, 25 fps, ±1 Vpp
- S-Video 1.18 Vpp (when load is 75 Ω)
- Audio
- Channels: 2 stereo
- Analog input voltage: 1 Vpp
- Input resistance 10 kΩ, single ended
- Video Outputs
- DVI cable requirement: DVI-D (single link)
- DVI for LCD displays: 60 Hz, 1280 x 1024 display supported at all input resolutions
- DVI output voltage (max.): 3.475 V
- DVI output voltage swing: 400 to 600 mVpp
- ESD (HBM): 4000 V
- Composite: 1.25 Vpp (when load is 75 Ω)
- S-Video: 1.18 Vpp (when load is 75 Ω)
- SDI Serial output data rate (max.): 1.485 Gbps
- SDI Serial output voltage swing (max.): 880 mVpp
- SDI Output impedance: 75 Ω, single ended
- Image processing
- Compression types
- MPEG-1 720 x 489/576
- MPEG-2 720 x 480/576
- MPEG-4 720 x 480/576 (480 NTSC, 576 PAL)
- Scaling: HDTV to D1 for MPEG compression
- Host Communication
- USB 2.0: Control & compressed audio/video stream
- Working speed: 480 Mbits/second (SUB 2.0 high-speed)
- Data output high voltage: 2.4 V
- ESD (HBM): 2000 V
- Digital I/O
- Hard contact relay outputs: 4 NO/NC contacts
- Opto-isolated: 8 Sets
- Other
- Grounding:
- Digital GND and analog GND are connected on 2246 board
- Four mounting holes are not connected to ground
- Input power: 5 V, 2 A
Part Numbers
HD-SDI Video Processor/Capture Card with Overlay
Model: 2246 Please see below
Model | Description |
2246 | HD-SDI Video Processor/Capture Card |
2246S | HD-SDI Video Processor/Capture Card w/Enclosure |