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.

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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.

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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.

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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	2 x 3G/HD/SD SDI + Embedded Audio 2 x 3.5mm Jack Analog Audio Input
Output Interface	2 x 3G/HD/SD SDI Loop-Through
Host Interface	PCI Express x1 host bus interface
3G / HD / SD SDI Inputs	Adaptive cable equalizer Reclocker with low phase noise, integrated VCO Operation at 2.97Gbps, 2.97/1.001Gbps, 1.485Gbps, 1.485/1.001Gbps and 270Mbps Supports SMPTE 425M (Level A and Level B), SMPTE 424M, SMPTE 292M, SMPTE 259M-C and DVB-ASI Equalized length of Belden 1694A cable (150m – 2.97Gbps; 230m – 1.485Gbps; 440m – 270Mbps) Comprehensive error detection and correction features * Full Video input formats supported in Supported Video Sources document
Video Capture	Real-time HD/SD video acquisition and compression Full frame rate HD frame grabber for simultaneous uncompressed video capture 2 channel Real-time 3G/HD/SD video acquisition and compression 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 Synchronized audio/video acquisition Audio capture from SDI embedded audio 2 channel audio capture 1 frame maximum latency (can be reduced to a few milliseconds under special circumstances) PCI Express x1 – can be placed into any PCI Express slot Use multiple cards for multichannel systems
Video Processing prior to compression	Advanced hardware deinterlacing Frame rate reduction feature available Video downscaling Text overlay Smoothing filter Denoise filter Synchronization to external events 4:4:4 8 bit Video Processing
Video compression	H.264 / MPEG-4 Part 10 High Profile level 5.1 VC-1/SMPTE-421M advanced profile level 3 video compression I only or IP compression with variable GOP size 1024×512 motion vector search range covered VBR (variable) and CBR (constant) bitrate control Bitrates from 64Kbit/s to 80Mbit/s Bitrate reduction via monochrome mode when color is not needed Extensive Motion statistics for all frames MPEG-TS or ASF container format Very low compression latency
Software Features	Identical API over all platforms Dynamically linkable libraries supplied (.dll, .so, .dylib) Sample Video4Linux applications Sample QuickTime applications Sample DirectShow applications Sample c/c++ applications Multiplatform support (Windows/Mac OS X/LInux)