Version 6.04 (002)

Broadcast networks

  • Study and design of new systems and broadcasting networks and performance evaluation on models
    fixed and mobile channel
  • the planning of the service analysis to assess the potential
  • Contribution to the standardization bodies (DVB, ITU, ETSI)
  • Support for Engineering and Rai Way in the introduction of new systems and services

... Projects in this area (20)

Active project

DVB-S2X - the DVB-S2 extension for the future of satellite communications

First 4k HEVC satellite transmission using DVB-S2X from Turin

Born as an extension of second generation satellite broadcast standard DVB-S2, the DVB-S2X offers new configurations that provide improved performance in S2 scenarios (DTH, broadband and interactivity, DSNG, and professional applications, contribution and distribution TV), and extends the operating modes to cover new emerging segments such as mobile reception (airplanes, trains, ships, etc.). The new system, based on the excellent technologies of DVB-S2, introduces innovative elements at the modulation, resulting in a more extensive and granular operating range in terms of  signal-to-noise ratio, as well as an increased spectral efficiency thanks to new modulation schemes and spectrum roll-off values. With the DVB-S2X the “channel bonding” is now introduced: 2 or 3 transponder can be used simultaneously, in order to transmit very high capacity streams, enabling the broadcast of UHD bouquets.

The first satellite transmission of a HEVC encoded UHD-4k bouquet, using the new broadcasting standard DVB-S2X, has been carried out on 2014 at the Centre for Research and Technological Innovation Rai in Turin.

Active project

“Single Illumination”

New DVB technology to serve satellite customers and to feed terrestrial transmitters

Today, the satellite distribution of DVB-T2 multiplexes to terrestrial transmitters located throughout the territory requires dedicated transponders for the transport of the relevant T2-MI (Modulator Interface) streams, which are not directly accessible also for direct-to-home reception by standard satellite receivers. This causes duplication of the needed satellite bandwidth, with the associated costs. To overcome this problem, DVB (Digital Video Broadcasting) has activated a new ad-hoc group, named TM-T-JSI, with the purpose of defining an optimized way to transport DVB-T/T2 multiplexes from a national head-end to the terrestrial transmitters, while allowing at the same time direct reception via DVB-S/S2 commercial satellite receivers.

Active project


Satellite supporting CDNs for the distribution of OTT services

The integration of terrestrial and satellite telecommunication networks will allow the widespread distribution of OTT contents, offloading the CDN backbone during traffic peaks, for the benefit of the effective picture quality perceived by the users.

Active project

SFN Scope: an innovative analysis system for DVB-T SFN signals

Created and patented by Rai-CRIT, SFN-Scope can analyze SFN DVB-T signal received in the service area, and identify the individual components of the signals emitted from transmitters in service to the area, with their levels and delays. SFN-Scope thus makes now possible to simplify the signal quality control operated by RaiWay teams, and get actual feedback for level/delay measurment that until now were only available in a “aggregate” form by ordinary instruments.

Experimental activity (completed)

Experimentation of the coexistence of PMSE services and LTE in the 2.3-2.4 GHz band

The growing demand for transmission capacity for mobile access has led in recent years public administrations to consider new ways of spectrum management, which include sharing between different services and operators. At the invitation of the Italian Ministry of Economic Development we have participated and contributed to a field experiment aimed at assessing the problems of interference eventually suffered by PMSE services (wireless cameras for TV production) by LTE services in the 2.3-2.4 GHz band.