A Quick Look at the DVB-T2 Standard

07Apr10

It is no surprise that most of the countries in the world are already shutting down the analog TV signals (ASO) and moving to the digital world. DVB-T standard has been the most welcomed one so far, whereas lately we have started to see trials in a few countries for using the brand-new DVB-T2 standard.. Before we move on, the question is:

What is the Analog Shut Off (ASO) anyway?

On a very basic level, it is all about more efficient usage of the limited available frequency on the air. Using the digital signals for TV broadcasting, there will be many benefits such as more TV channels, freed frequencies that could be used for other purposes and so on. Please refer to my post for more information regarding the digital dividend.

Commercial Requirements of the DVB-T2 Standard [1]:

  • T2 transmissions must be able use existing domestic receive antenna installations and must be able to re-use existing transmitter infrastructures.
  • T2 should primarily target services to fixed and portable receivers.
  • T2 should provide a minimum of 30 % capacity increase over DVB-T working within the same planning constraints and conditions as DVB-T. (Side Note: Provided almost %50 capacity increase in the UK during the trials.)
  • T2 should provide for improved single-frequency-network (SFN) performance compared with DVB-T.
  • T2 should have a mechanism for providing service-specific robustness; i.e. it should be possible to give different levels of robustness to some services compared to others. For example, within a single 8 MHz channel, it should be possible to target some services for roof-top reception and target other services for reception on portables.
  • T2 should provide for bandwidth and frequency flexibility.
  • There should be a mechanism defined, if possible, to reduce the peak-to-average-power ratio of the transmitted signal in order to reduce transmission costs.

  Architectural Model:

Benefits:

Since I work in the sales department, I always concentrate on the benefits on the technologies keeping in mind the cool features. The benefits can be listed as the following:

  • Almost %50 gain in capacity (from 24.1 Mbit/s to 36.1 Mbit/s)
  • Offers greater tolerance of multipath and impulsive interference
  • Improved SFN performance
  • No need for changing the already-installed antennas

Adoption of DVB-T2 in the World

Some countries in Europe such as Italy, Turkey, Serbia, has already made some announcement about deployment of  DVB-T2 network. Some trials should also take place in Germany, Spain, Sweden and Austria. [2] Well, we will see how it goes with the trials and how much it will adopted all over the world. If you have something to share, please don’t hesitate!

 References:

  1. “(DVB-T2) Digital Video Broadcasting (DVB)  Implementation guidelines for a second generation digital terrestrial television broadcasting system”, DVB Document A 133, December 2009
  2. http://www.enensys.com/technologies/dvb-t2-overview.html , Last accessed 7 April 2010
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6 Responses to “A Quick Look at the DVB-T2 Standard”

  1. 1 reslfj

    The capacity of the UK DVB-T2 mux is 40.2 Mbit/sec (and not 36.1). This translates into
    40.2/24.1 of +67%.

    And the ‘improved SFN performance’ does make country-wide SFN’s possible where they are not with DVB-T (except for very small countries).

    DVb-T2 is much more than your three points – its hugely better.

    Lars 🙂

    • Hej Lars,
      Thank you for your comment. I am sure DVB-T2 is much more than my three points, so I’d be happy if you could contribute to those points.
      Gökhan

  2. Good job adaş 🙂

  3. 5 Alexandar

    Hmmm… I think that needed for DVB-T2 could be considering from a looking point each country (from case by case). If I can’t to fill my MUX DVB-T, why I need to get DVB-T2?

    Regards

    • In that case, less power consumption could be a reason to upgrade to DVB-T2 but capacity will definitely be needed, if not today, tomorrow.


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