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"parallel DTH & DTT transmission"

98 % satellite capacity savings for DTH

OPTIMUX DTH platform for satellite TV transmission to terrestrial SFN networks.

DVB-T2 and ISDB-T BTS signals designated for TV transmitters cannot be received by home satellite receivers (DTH). They contain additional signalling to SFN TV transmitters and special formatting.

TV broadcasters must therefore broadcast the same satellite signal twice, in 2 different formats, to provide satellite TV service to home users.

OPTIMUX T2 & OPTIMUX ISDB allow direct-to-home (DTH) satellite broadcast of DVB-T2 MI and ISDB-BTS signal in parallel to its primary direct-to-tower transmission.

This results in significant bandwidth savings. Normally TV broadcaster would have to have take 30 Mbps for direct-to-tower transmission and 30 Mbps for direct-to-home transmission, in total 60 Mbps of satellite capacity. With OPTIMUX DTH the broadcaster pays only for 31 Mbps instead of 60 Mbps, it meaning 98 % savings.



Key features:

  • Installation at the satellite uplink and TV transmitters only.
  • Direct to home satellite reception.
  • Multi TV standards support e.g. DVB-T2, ISDB-BST.

How does it work ?

OPTIMUX Tx adapter splits DVB-T2 GW (gateway) and ISDB BTS adapter output into 2 parts:

  • part 1 contains TV services in a format understandable by ordinary satellite receivers
  • part 2 contains additional signalling for SFN TV transmitters.

Thanks to the patented OPTIMUX processing satellite, the signal is directly receivable by the satellite home users.

The OPTIMUX Tx adapter is placed at the satellite uplink behind e.g. DVB-T2 GW or ISDB BST adapter, see figure bellow.


Fig. OPTIMUX T2 / ISDB satellite network block diagram


TV transmitters are equipped with OPTIMUX Rx adapters which deterministically regenerate original DVB T2-MI and ISDB-BTS signal from part 1 and part 2. OPTIMUX Rx adapter output is understandable by DVB-T2 and ISDB-T transmitters. OPTIMUX Rx adapters can operate within the SFN network.


Thanks to the OPTIMUX architecture there is a single central clock controlling all TV transmitters within the SFN cell.

What are the bussines cases?

Free of charge satellite DTH service, in both cases when the satellite serves as a primary or back-up transmission to SFN TV towers.


OPTIMUX T2 & ISDB allow broadcaster to fill the gaps of terrestrial TV network coverage.


National terrestrial TV networks do not cover country territory in full; there are always large unserved areas. Investments in the terrestrial TV network exponentially grow with the coverage. Increase of coverage e.g. from 70 % to 90 % doubles the investments.

There are other OPTIMUX bandwidth savings platforms for other business cases: