4 HD-SDI Broadcast Encoder IPTV and ASI Out MPEG2 / H.264 / AC3/ 1080p / CC

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Description Features Drawings Specification Q&A Documents Support

H-4HD-EMS  4 Ch HD-SDI Program Encoder 

Real Time Encoder for 4 HD-SDI to MPEG-2 or H.264 on ASI or IP with CC & AC/3

Designed as a companion encoder for the popular QAM-IP series of encoder modulators, Thor H-4HD-EMS series HD program encoders accept up to 4 channels of uncompressed HD-SDI digital video on 4 BNC connectors.  Managed through any modern web browser, each encoder can be independently adjusted for bitrate, codecs, and video image qualities.  Encoding support for the MPEG-2 codec along with Dolby AC/3 audio ensure that the programs generated by this encoder can be viewed by virtually every TV in the United States.  All four program streams are multiplexed into an ASI MPTS output on mirrored BNC terminals.  The ASI output can be directly connected to the ASI input on a QAM-IP digital TV channel modulator.  This allows additional programs to be added to the QAM-IP output channels as additional "virtual" or "sub" channels.  On a TV this will appear as channels 2.1, 2.2, etc.  Each digital channel can carry as many as 20 programs, depending on resolution and encoded bit rate.  In addition to the ASI output, the program streams are also available as UDP or RTP network video transport streams.  This output is fully compliant with IGMP Multicast UDP MPEG-TS standards and can be easily injected into almost any IPTV system.  The stream is a universally accepted format, and can easily be viewed in client applications such as VLC.  In addition to network management on a dedicated NMS Ethernet port, all settings and menu configuration items can easily be viewed or adjusted from the front panel LCD and keypad.  LEDs are also provided for alarm monitoring and input video detection.

  • Real Time MPEG-2/H.264 Encoder with Low Latency option
  • Independent control for encoding parameters on each channel
  • Supports 608 & 708 Closed Captioning Standards
  • Supports Dolby AC/3 audio codec for compliance with US TVs
  •  Designed to easily add 4 additional channels to a QAM-IP
  • Stream IP Out :1x MPTS and4x SPTS  over UDP, RTP/RTSP our (RJ45, 100M)
  • Stream ASI Out; 2 x ASI mirrored Out
*All Specifiactions Subject to Change Without Notice


Supported Output Resolutions
1080p60, 1080p59.94, 1080p50
1080i60, 1080i 59.94, 1080i50
720p60, 720p59.94, 720p50
720i60, 720i59.94, 720i50
Video Codecs


MPEG-4 AVC/H.264

Audio Codecs
MPEG1 Layer 2
Dolby AC/3
LC-AAC (optional)
Bit Rate
0.8 - 19.0 Mbps CBR or VBR
Advanced Video Features

Input Deinterlacing, Noise Reduction, Sharpening

Supports Closed Captioning 708 Standard with 608 legacy

Audio Sampling Rate
48 KHz, 24 bit resolution
Audio Bit Rate
64 - 384 Kbps Each Channel
IP Transport Stream Output

1x MPTS and
4x SPTS  over UDP, RTP/RTSP our (RJ45, 100M)

ASI Transport Stream Output
2x Mirrored ASI Multiplexed Output
Managment Interface
Web Based Browser Interface
Full Front Panel LCD Interface
480 x 455 x 45 mm
3.25 Kg
Operating Temperature
0 - 45 C
Question and Answers

Yes that would be the ideal unit; correct there would still be some
latency because any encoder regardless of the manufacturer will have
The only way to remove latency is to send those SDI links over a
Single Fiber; is the only realistic solution.
If you have to use IP, then the V3-IRD is the only solution we have
with SDI outputs; the IP-HDMI is slightly less expensive, but you
rightly mentioned you will need converters for that.
As for the data rate, I believe that would suffice since you could
ideally, encode in MPEG4 since you need SDI back out on the far end.
It's hard to estimate what kind of delay you'd be looking at; in this
case the encoder, decoder, and IP link will all introduce latency;
between all pieces, I can't imagine it being better than 1-2 seconds,
again that's an estimate; it could be worse, it most likely won't be
better unless it's a very short distance.

Here is the 4 SDI encoder which might be a better fit if you don't need the RF
This unit can do both MPEG 2 and H264 independently on each stream for input on the SDI side
We do have an 8 Channel version but it's H264 only
The IRD-V3IP is what you'll need on the back end


I think you mentioned you might need 8 of the IRD; does that mean you'll need 2x the Encoder?

User's Manual is avalible only for logged users.
User's Manual is avalible only for logged users.
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