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Digital Television of the Second Generation - DVB-T2
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dvb-t2-logoIt seems that DVB-T technology is getting into “mature stage”. This technology of digital wireless broadcasting, which hasn’t reached its maximum exploitation yet, is experiencing competition from its direct descendant – the second generation of DVB, which is DVB-T2. The second generation of digital terrestrial (wireless) broadcasting offers the possibility to increase the capacity of the multiplexes for the broadcast of television contents. Compared with the actual digital television standard, DVB-T, the second generation provides increase of the capacity for between 30-50 percent in equivalent conditions for receiving and using the same antennas. Just for comparison, the current use of a multiplex, practically explained, represents broadcasting of nearly 10 TV- channels with a standard resolution (SD) or 5 TV channels in high resolution (HD). On the other hand, DVB-T technology will allow additional utilization of the capacities, so it will be possible to broadcast up to 15 channels in only one multiplex.


International Experiences with DVB-T2


Since this technology offers large capacities of the broadcasting channels, DVB-T2 became suitable way of broadcasting of HDTV signals of the terrestrial TV channels, which for now it is most profitable for the operators of optical, cable and satellite networks.
DVB-T2 is used in some European countries like Great Britain, Italy, Sweden, Denmark and few others. Some countries, which are still in the initial stage of introduction of DVB-T, plan to start the DVB-T2 broadcast once the analogue broadcast is switched off, like Serbia or Ukraine, in order to avoid unnecessary investments in “obsolete” DVB-T first generation technology.
The situation in Africa is very similar: during the last (2011) year, four African countries – Zambia, Uganda, Kenya and Nigeria – immediately started with digital broadcasting, using the DVB-T2 technology. Some East-African countries are walking on the same road, like: Tanzania, Ruanda and Burundi.

DVB_T_vo_afrika

Image 1. DVB-T in Africa
Mongolia has officially decided, the standards for terrestrial, cable and satellite broadcasting to be raised on a second generation level, so in this country, the operators will must use: DVB-T2 (for wireless terrestrial), DVB-C2 (digital broadcasting over cable , DVB-S2 (standard for satellite broadcasting, which is present on the market for DTH- services, for a longer period of time).


What are the implications of DVB-T2 for countries where DVB-T services are already on air?


DVB-T is the most widely deployed digital terrestrial system worldwide, with over 60 countries that have adopted the DVB-T standard and more than 200 million receivers distributed. Today, the price of the receivers constantly decrease and the basic models of receivers are also available for low prices in Macedonia. Worldwide, the DVB-T2 set-top boxes and integrated TV sets are available for affordable prices. The difference in prices between DVB-T and DVB-T2 is pretty small.
During the next few years, the countries that have started to use the DVB-T services, it is expected that the regulators will be interested to achieve full analog switch-off, and the process will release the higher frequencies of the spectrum for other purposes.  Introducing new services which are using the DVB-T2 technology can be provided after the analogue switch-off, for example deployment of new national multiplexes that will offer multichannel HDTV services or maybe innovative data services.  In these countries, the transition from DVB-T Services in   DVB-T2 services should be performed very carefully, so it is expected that in certain period of time, these two types of services will coexist.


Situation in Macedonia and transition to DVB-T2


Logo_MRT_ONE

 

Image 2. BOOM TV and MB are DVB-operators in Macedonia

 

Since Macedonia was one of the countries, which have introduced DVB-T technology relatively early (2009), via the operator of digital terrestrial television – ONE- for the time being the standard adopted for the ONE’s network and the network of the MRT programss, operated by thePublic Enterprise - Macedonian Broadcasting, are from the first generation of DVB-T.  The transition to DVB-T2 technology shouldn’t be very hard and expensive on the side of transmitters, further more because some companies offered software solutions on the market for upgrade of the broadcasting systems from DVB-T to DVB-T2.
The eventual change of the technology could become challenging on the receivers’ level: those who have already bought new TV sets, which are capable of receiving DVB-T signals, can’t receive DVB-T2. They will need additional receivers for conversion of the signal from DVB-T2.

 

Authors: Borce Manevski/ Simona Temelkova

 

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