HD-SDI audio/video H.264 encoder/decoder | Model 2226
- High profile H.264 HD/SD encoding and decoding
- Transport stream format
- HD (1080p/1080i, 720p) and SD (NTSC, PAL)
- Audio on SDI or external
- Audio level meter
- Blu-ray compatible
- HD/SD uncompressed frame capture
- Full screen 16-bit color graphics/text overlays with transparency
- Low latency uncompressed preview stream
Model 2226 is obsolete. This archived information is provided as a courtesy to customers who own model 2226 units.
Description
Model 2226 is a USB 2.0 audio/video H.264 encoder/decoder with full screen text/graphics overlay that supports a variety of video resolutions, including SDI 1080i/1080p/720p and SDI and analog NTSC/PAL SD. The encoder outputs H.264 High Profile Level 4 for HD and Main Profile Level 3 for SD, multiplexed in MPEG transport stream format. The board's versatile overlay generators, integral HD/SD raw frame grabber, and live preview stream make it ideally suited for a wide range of video processing applications, including High Profile DVRs, medical vision systems, live TV, teleconferencing, and stream servers.
High Profile H.264 Encoding
Broadcast quality video compression is achieved by using High Profile H.264 encoding, which is unavailable in many lower quality encoders that implement only Baseline or Main profiles. Streams recorded from the 2224 can be burned to Blu-ray disks without transcoding.
While the unit is encoding, the source video may be overlaid if desired, and then echoed on the SDI and composite video outputs. A frame buffer with dedicated overlay generator is provided to capture 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 employs sophisticated hardware to keep audio synchronized to video, thereby eliminating lip sync problems characteristic of other solutions, which often rely on application software to perform this task.
Simplified encoder block diagram
Decoding
When functioning as a decoder, the 2226 can receive, via USB, a stream that was previously encoded by a 2226 and decode and output the results on its video and audio outputs. If desired, the video may be overlaid before being output.
Simplified decoder block diagram
Inputs and Outputs
Video inputs and outputs include HD/SD SDI in/out, composite video in/out, and S-Video in/out (stand-alone Model 2226 only). The unit has two composite outputs and two SDI outputs so that multiple monitors can be driven directly without requiring an external splitter.
Audio may be sourced from embedded SDI audio, external audio line in, external high-level microphone signals, or decoded MPEG output. Audio can be output to embedded SDI, line out, MPEG encode stream, or any combination of these. Model 2226 may be ordered with an optional on-board XLR3 microphone input connector and preamplifier for low-level microphones.
Video Overlay
Model 2226 supports text and graphic overlays at 16-bit color resolution. Eight overlappable, hardware-managed regions are supported. Each rectangular region may occupy up to full screen size. Any true-type font can be displayed. Graphics can be displayed from standard .bmp files as well as generated on the fly by Sensoray's 2226 API. The API allows graphics to be easily placed and moved anywhere on the screen. Real-time update rates are possible for small overlay regions, while update rates for larger regions vary depending on computer speed and USB activity.
While encoding, each overlay region may be applied to the H.264 stream, the video output stream, the freeze frame/snapshot, or any combination of these. In the case of H.264 streams, the video is overlaid before compression. When decoding, the H.264 stream is first decoded and then overlaid before the video is output.
Uncompressed Capture
Sensoray's SDK (software developer's kit) enables the 2226 to send an uncompressed, down-scaled video stream through the USB port to enable low-latency video previewing on the USB host computer.
Packaging Options
The unit is available in a robust enclosure (model 2226S) or as a stand-alone board (model 2226) for OEM applications.
Model 2226S features a sturdy metal enclosure with video, audio, USB and GPIO connectors
Model 2226 is a bare-board version of Model 2226S for OEM applications
Specifications
| Video | ||
|---|---|---|
| Inputs | Composite | SD (NTSC or PAL): 1 Channel BNC Connector, 75 Ohms; 1 Channel via a 20-Pin Connector, 75 Ohms |
| S-Video | SD (NTSC or PAL): 2 Channels, via 20-pin Connector, 75 Ohms | |
| SDI | HD/SD: 1 Channel,compliant with: SMPTE 292M,SMPTE 344M, SMPTE 259M, ITU-R BT.1120, and ITU-R BT.656 | |
| Outputs | Composite | SD (NTSC or PAL): 2 Channels, via BNC, 75 Ohms; 1 Channel, via a 20-pin Connector, 75 Ohms |
| S-Video | SD (NTSC or PAL): 1 Channel, via a 20-pin Connector, 75 Ohms | |
| SDI | HD/SD: 2 Channels, compliant with SMPTE 292M, SMPTE 344M, SMPTE 259M, ITU-R BT.1120, and ITU-R BT.656 | |
| Audio | ||
| Inputs | 1 Channel | Stereo/Mono or XLR3 balanced (model 2226 only, specify when ordering). |
| Stereo/Mono | 3.5mm AudioJack, Line-in ±1.0V signal level | |
| SDI | Ancillary data embedded in SDI input | |
| Outputs | Stereo | 1 Channel, via 10-pin connector, 2 differential pairs |
| Mono | 1 Channel, via 10-pin connector, 1 differential pair | |
| Headphone | 1 Channel, via 10-pin connector, Stereo, COM-mode L/R | |
| SDI | Ancillary data embedded in SDI output | |
| CODEC | ||
| H.264 Conformance | HD | ISO/IEC14496-10 (H.264/AVC) High Profile Level 4.0 |
| SD | ISO/IEC14496-10 (H.264/AVC) Main Profile Level 3.0 | |
| Video Formats and Bit Rates (frames per second) |
HD | 1920x1080p, 24/23.98 Hz, 2Mbps to 17Mbps 1920x1080i, 30/29.97/25 Hz, 2Mbps to 17Mbps 1280x720p, 60/59.94/50, 2Mbps to 17Mbps |
| SD | 720x480i, 29.97 Hz (NTSC), 1Mbps to 10Mbps 720x576i, 25 Hz (PAL), 1Mbps to 10Mbps |
|
| Audio | Sampling Rate | 48 kHz |
| Bit Rates | 64, 96, 112, 128, 160, 192, 224, 256 Kbps | |
| Conformance | MPEG-1 Audio Layer 2 | |
| Stream | Format | H.264 inside MPEG transport stream |
| Overlay | ||
| Color Resolution | 16 bits | |
| Hardware Regions | 8 overlappable, up to full screen size. Instantaneous updates via shadow RAM | |
| Video Formats (H.264 encode/decode) |
HD | 1920x1080p, 24/23.98 Hz 1920x1080i, 30/29.97/25 Hz 1280x720p, 60/59.94/50 |
| SD | 720x480i, 29.97 Hz (NTSC) 720x576i, 25 Hz (PAL) |
|
| Video Formats (live video output and snapshots) |
HD | 1920x1080p, 30/29.97/24/23.98 Hz 1920x1080i, 30/29.97/25 Hz 1280x720p, 60/59.94/50 |
| SD | 720x480i, 29.97 Hz (NTSC) 720x576i, 25 Hz (PAL) |
|
| Other | ||
| Host Interface | Type | USB 2.0 |
| Software | OS Support | Windows and Linux |
| Power | 7.5W, +5V @ 1.5A | |
| Temperature | Operating | 0 to 70°C (TBT) |
| Mechanical | Dimensions | 5.7” x 4” (145mm x 102mm) |
Documentation
| File | Version | Date M-D-Y | Type | Size |
|---|---|---|---|---|
| Manuals | ||||
| 2226 Hardware Manual | 1.0.0 | 10-17-24 | 726 KB | |
| 2226 Windows Software Manual | 1.0.2 | 10-17-24 | 649 KB | |
| 2226 Linux Software Manual | 1.0.2 | 10-17-24 | 409 KB | |
| Mechanical Drawings | ||||
| 2226 Mechanical Drawing | 1.0.0 | 10-17-24 | 132 KB | |
| 2226S Mechanical Drawing | 1.0.0 | 10-17-24 | 93 KB | |
| Other | ||||
| Model 2226 tech support wiki FAQs, examples and additional information | — | — | HTML | — |
Downloads
| File | Version | Date M-D-Y | Type | Size |
|---|---|---|---|---|
| 2226 Windows Software Development Kit | 1.0.15 | 10-17-24 | ZIP | 42.24 MB |
| 2226 Linux Software Development Kit | 1.1.13 | 10-17-24 | GZ | 4.74 MB |
| 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. | ||||