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H-4HD-EMH  4 Channel HDMI Program Encoder IPTV and ASI

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

Designed as a companion encoder for the popular QAM-IP series of encoder modulators, Thor H-4HD-EMH series HD program encoders accept up to 4 channels of uncompressed HDMI digital video on 4 inputs.  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 on 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 Dolby AC/3 audio codec for compliance with US TVs
  • Designed to easily add 4 additional channels to a QAM-IP
  • Redundant hot standby power supply for highest reliability
  • Ip Stream Out: 1x MPTS and 4x SPTS  over UDP, RTP/RTSP our (RJ45, 100M)



4x HDMI 

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 

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 ASI Multiplexed Output 
Managment Interface Web Based Browser Interface
Full Front Panel LCD Interface 
Dimensions 480 x 455 x 45 mm 
Weight 3.25 Kg 
Operating Temperature 0 – 45 C