The ongoing Ice Hockey World Championship has once again opened up the topic of technical differences between various methods of television signal distribution. Current viewer experiences confirm that digital terrestrial broadcasting (DVB-T2/DTT) maintains its lead in the speed of image delivery to the viewer. While users of internet televisions (IPTV) and streaming platforms (OTT) report delays, viewers receiving the signal via a conventional antenna watch key moments of matches in real-time.
The main factor is the so-called latency, i.e., the signal delay, which arises during data processing and distribution. With digital terrestrial broadcasting, this delay is minimal. In contrast, with internet platforms, the delay commonly ranges from tens of seconds. This difference is most apparent during mass-viewed sports broadcasts, where viewers watching terrestrial broadcasting react to goals significantly earlier than those using an internet connection.
The difference stems from different technological architectures. Internet televisions use unicast and buffering, where data must be pre-loaded into the device to ensure image stability. Terrestrial digital television operates on the principle of widespread broadcasting, which is more efficient for a mass audience.
“DTT is the most efficient and fastest way to deliver live content to millions of viewers simultaneously. Unlike IPTV platforms, we don't have to deal with strengthening infrastructure and worry about whether there will be an overload and collapse of the service,” state representatives of České Radiokomunikace (CRA).
In addition to speed, a key advantage of terrestrial broadcasting is its resistance to network overload. Because a signal transmitted over the air can be received by an unlimited number of users at once, there is no risk of outages caused by a sudden increase in viewership. This is crucial not only for sports broadcasts but also for crisis communication or extraordinary news, where fast and stable information delivery is a priority.
The advantages of low latency were fully demonstrated, for example, during intense matches of the Czech national ice hockey team. Although OTT and IPTV technologies offer a number of additional features, in terms of the speed of delivering “live” content, the traditional terrestrial platform remains technically unsurpassed. For fans who do not want to hear celebratory shouts from neighbors before they see the puck in the net on their own screen, DVB-T2 remains the primary choice.