In information networks and print media there is more and more information about the replacement of analogue broadcasting with digital. Even a specific date is reported - July 1, 2018, when analogue TV broadcasting will be completely switched off in Russia.
Analog broadcast
Analogue broadcasting uses an electrical signal to output, transmit, receive sound and images. It can be transmitted both by radio and by cable. Many domestic TV channels broadcast in analogue standard. And for satellite and cable channels, programs are duplicated in digital format.
The analog broadcast signal goes continuously, it is vulnerable to any external influences. This leads to a deterioration in the quality of sound and picture. Such broadcasting has only one big advantage over digital - the signal can be received using a simple antenna. Urban residents mainly use the services of cable TV providers.
For the first time in the world, Luxembourg and the Netherlands abandoned analog television in 2006. As of 2014, 23 more states have completely switched to digital broadcasting. In Russia, the disconnection of the analog signal is postponed indefinitely each time. This is due to the fact that for the transition it is necessary to solve a number of problems associated with the laboriousness and unprofitability of covering sparsely populated territories, confusion in digital television broadcasting, and low advertising income during the transition stage. But the main problem is that the population does not want to part with old TV sets and buy new generation equipment (digital set-top boxes).
Digital broadcasting
Television is called digital, for which sound and image are transmitted using video coding. Compared to analogue broadcasting, the advantages are obvious:
- high quality sound and image in TV receivers;
- the ability to record and archive TV programs;
- high definition;
- the ability to select the language and subtitles;
- the presence of a function with which you can return to the beginning of the program;
- improvement of noise immunity;
- decrease in the power of TV transmitters.
Digital television has one drawback - the data is received 100% with high quality or, conversely, poorly and with the impossibility of recovery. Also, the signal is securely encoded and difficult to intercept.
To receive a digital signal, you must purchase a TV that is capable of receiving such a signal, or buy a digital receiver. Some mobile devices and gadgets can also receive digital signals, thereby allowing a person to watch their favorite programs on the road or in the country in high quality.
