What is a digital TV signal?

Digital TV signal is one of the two main ways of data transmission and images via television broadcasting. TV broadcast stations send information as analog or digital signals. These signals can be transmitted in many ways, such as air, cable or satellite, but are always analog or digital. While both types of signals have advantages over the second, the advantages of a digital dwarf analog. As a result of this clear technological advantage, the digital television signal is legally necessary to broadcast television broadcasts in many countries.

While two types of television signals do the same, they do it in very different ways. The analog signal looks like a wool moving up and down an analogous way to the original transfer source. Changes in aspects of transmission cause a change in wool, resulting in decodable information. The digital TV signal acts as a computer transmission. Binary data explosion representing IS broadcasts sent and decoders onThe other end read the data and create a picture based on information.

This difference results in a handful of very important differences. Analog signal is a real image sent by the broadcaster, while the digital television signal is a binary copy. This means that interference in analog transmission leads to ghost or static, but the image is visible, although almost completely degraded. Digital transmissions need a rough majority of information to display. If the decoder does not have a complete set of binary code, it simply cannot display anything, resulting in the effect of the blue screen conventional on modern TVs.

Although this difference is important, it is the relative size of two signals that make the biggest difference. If two types of broadcasts could be displayed, one would appear as a wave with high peaks and valleys, so far, it would appear as a narrow belt of binary code. In many ways it is true týh, their relative sizes. The analog signal is very large compared to the digital signal.

Because the digital TV signal is much smaller, many things can do that an analog signal cannot. One of the most important abilities is broadcasting high -resolution television (HD). Along with the HD signal, the bandwidth is used for additional program information such as channel and assembly, subtitles and even more versions of the same channel, usually represented as channel X.1, X.2, etc. Some broadcast stations send data streams along with television signals that provide specially equipped weather receivers, sports or updates.