Description

Sensoray Model 2226 is a USB 2.0 A/V (audio and video) H.264 MPEG codec that supports multiple video input formats, including SDI 1080i, 720p, and SDI or analog NTSC/PAL SD. Analog video is digitized to BT.656 format. The unit outputs H.264 High Profile Level 4 for HD, and H.264 Main Profile Level 3 for SD, multiplexed in MPEG transport stream format. Streams recorded from the 2226 can be burned to Blu-ray disks without transcoding.

The unit is available in a robust enclosure (model 2226S) or as a stand-alone board (model 2226) for OEM applications. An optional termination board adapter, Model 2226-TA, can be used to conveniently break out connections from Model 2226.

Encoding

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 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 the application software to perform this task.

Encoder Dataflow

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.

Decoder Dataflow

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.

The unit supports stereo or mono line in/out, and headphone output. Model 2226 may be ordered with an optional on-board XLR3 microphone input connector and preamplifier.

Video Overlay

The 2226 supports text and graphic overlays. As many as eight hardware-managed overlay regions may be defined, with unlimited region overlap. Each region may have any rectangular size up to that of the video frame. 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 echoed video output stream, the "freeze frame" stream, or any combination of these. In the case of the H.264 stream, the video is overlaid before it is compressed.

When decoding, the H.264 stream is first decoded and then overlaid before the video is output.

Upcoming features

Uncompressed Capture

Coming soon: Sensoray's next SDK (software developer's kit) release will enable 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.

Product Photos

Model 2226S features a sturdy metal enclosure with video, audio, USB and GPIO connectors

Also available: 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
Outputs	Stereo	1 Channel, via 10-Pin Connector, Differential Left & Right
	Mono	1 Channel, via 10-Pin Connector, Differential pair signals
	Headphone	1 Channel, via 10-Pin Connector, Stereo, COM-mode L/R
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	HD	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
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	Type	Size	Last Updated
Manuals
2226 Hardware Manual	1.0.0	PDF	726 KB	9 Mar 2011
2226 Windows Software Manual	1.0.1	PDF	491 KB	19 Aug 2011
2226 Linux Software Manual	1.0.0	PDF	244 KB	9 Mar 2011
Mechanical Drawings
2226 Mechanical Drawing	n/a	PDF	132 KB	3 Jun 2010
2226S Mechanical Drawing	n/a	PDF	93 KB	2 Aug 2010

Downloads

File	Version	Type	Size	Last Updated
2226 Windows Software Development Kit	1.0.2	ZIP	22.84 MB	21 Nov 2011
2226 Linux Software Development Kit	1.0.1	GZ	3.65 MB	19 Aug 2011
2226 Firmware Update	1.0.1	ZIP	1.42 MB	19 Aug 2011

Prices

Model	Description	Qty 1	Qty 2-9
2226	USB HD-SDI Audio/Video Codec	$1787	$1644
2226S	USB HD-SDI Audio/Video Codec w/Enclosure	$1890	$1739