It is the extension of the television standard DVB-T, issued by the consortium DVB, devised for the broadcast transmission of digital terrestrial television.
Projects with this TAG (5)
Mitigation techniques of the interference generated in TV distribution installations by 4G/5G signals in the 700 and 800 MHz bands
The activation in the UHF band of 4G/5G Base Stations can have in some areas an impact on TV reception, especially in case of community antenna installations. The adoption of proper interference mitigation techniques, such as the insertion of specifically designed filters at the head-end of the distribution network, allows to mimimise the effects in most situations.
4K, the evolution of Television
The prospects for a new way of watching TV
More pixels or best quality pixels? The problems of a higher resolution signal against an improved quality signal. The challenges of Rai and Reserch Centre towards a high technical quality television.
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.
DVB-T2: single frequency network in Aosta Valley
The Research Center in co-operation with Rai Way has launched in Aosta Valley on UHF channel 53 a second DVB-T2 transmitter located in Salirod-Saint Vincent that, along with the transmitter Gerdaz-Aosta, installed in 2012, allowed to set up a DVB-T2 a small regional single frequency network test bed. This field trial has allowed us to experience the typical issues associated with a SFN: synchronization of transmitters, assessment of the areas of overlapping coverage, delays inserted to avoid static interference zones etc
DVB-T2 lite in Aosta Valley
A successful field trials
The Research Center, after experimenting in the laboratory the first prototypes of DVB-T2 lite, activated in Aosta Valley a single frequency network on UHF channel 53 in order to test the potential offered by the new system . The scheme chosen for the testing involves the use of “mixed” system: the T2 signal is split into two sub frames, one compatible with the standard T2 base, the other T2 lite, optimized respectively for fixed and mobile reception . The four transmitters of Gerdaz, Salirod, Arpy and Courtil radiate a bouquet consists of three HD programs for the T2 base and from one to three services oriented to mobile reception for the T2 lite.