LT 122 PCIe Dual Channel (SDI) Media Acquisition & Compression
LT 122 PCIe Media Acquisition & Compression

Dual Channel 3G/HD/SD-SDI
Real-time HD/SD video acquisition & compression over PCIe
- H.264 video codec or VC-1/WMV-HD video codec
- 2 channel Real-time 3G/HD/SD video acquisition and compression
- Full frame rate HD frame grabber for simultaneous uncompressed video capture
- 3D Mode Allows capture, synchronize and mix 3D video from 3D SDI-sources.
- SDI loop-through output for each input
- HDTV 1080p, 1080i, 720p, 576p, 576i, 480p, 480i compatible
- Audio capture from SDI embedded audio or external analog input
- Synchronized audio capture
- Bitrates from 64Kbit/s to 80Mbit/s
- Ultra low latency support (64 Video Lines)
- Windows, Linux & Mac OS X support
The LT-122 is a dual channel 3G/HD/SD-SDI video capture board that has the capacity to compress two HDTV video signals in real-time without using the host computer’s CPU resources. The product is installed in an available PCI Express slot on your host system.
This board captures video from SMPTE compliant SDI video sources via two industry standard BNC connectors. The LT-122 can extract multichannel embedded audio from the SDI stream. For external analog audio capture a stereo jack is provided. The audio and video are always synchronized, in hardware, for lypsync.
The LT-122 compresses video in compliance with the H.264 and VC-1 standard. VC-1 is an SMPTE standard that is popularly known as WMV (Windows Media). Both these advanced compression formats are widely used in media, medical, streaming, broadcasting, etc., applications. Used in 3D mode, the LT-122 can capture, synchronize and mix 3D video from 3D SDI-sources.
This powerful board can compress D1 to 1920×1080 (1080p/i) resolution signals at up to 60 frames per second (fps). If resolutions smaller than the source are required, the LT-122 can downscale the source to any size. The frame rate can also be reduced to any arbitrary value.
Compressed bitrates can vary between 64Kbit/s and 80Mbit/s depending on resolution, frame rate and quality desired. An uncompressed video capture function is also available for snapshots or continuous raw video acquisition from either or both channels.
Diagram

he LT-122 board has a very flexible front end and is capable of accepting a wide range of video signal thanks to the implemented Gennum GS2971 3Gb/s, HD, SD SD Receiver chip. The GS2971 supports SMPTE 425M (Level A and Level B), SMPTE 424M, SMPTE 292M, SMPTE 259M-C and DVB-ASI.
In addition to this inputs, there is an build-in 3G-SDI loop-throug output for each one of the input channels.
Video Processing Diagram

The LT-122-PCIe is comprised of several functional elements. The diagram above shows the various elements and their interconnections. a full description of their operation can be found in the data sheet document below.
Specifications and Features
Interface
Inputs
- 2 x 3G/HD/SD SDI + Embedded Audio
- 2 x 3.5mm Jack Analog Audio Input
Outputs
- 2 x 3G/HD/SD SDI Loop-Through
Host Interface
- PCI Express x1 host bus interface
Video Capture
- Real-time HD/SD video acquisition and compression
- H.264 or VC-1 HD video compression
- Bitrates from 64Kbit/s to 80Mbit/s
- Synchronized audio/video acquisition
- HDTV 1080p, 1080i, 720p, 576p, 576i, 480p, 480i compatible
- 4:4:4 8 bit Video Processing
- Enciris ISP (Image Signal Processing)
Software
- Windows XP/Vista Win7, Windows 8, Windows 10 32bit/64 bit driver
- DirectShow support as well as simple SDK
- Linux support
- Mac OS X support
Input Interface |
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Output Interface |
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Host Interface |
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3G / HD / SD SDI Inputs |
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Video Capture |
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Video Processing prior to compression |
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Video compression |
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Software Features |
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Typical Applications
- HDTV capture and storage
- Digital video recorders
- Machine vision video recorders
- Inspection systems
- Video Medical systems
- Teleconferencing
- Video surveillance systems
- Endoscopy DVR
- Video Over Lan
- Internet broadcasting
- Inspection systems