We explain what digital television is and its main characteristics. In addition, its operation and what is analog television.
Digital television or DTV ( Digital Tele V ision ) is known as a set of new audiovisual transmission and reception technologies that use digital signals instead of traditional analogue television.
This means that while ordinary television is transmitted by radio waves in the VHF and UHF bands, or alternatively by coaxial analog signal cables, digital television uses binary signals that allow the return between consumers and producers , giving rise to all a new range of interactive television experiences and allowing the transmission of several signals on the same channel.
This is a television revolution that began at the beginning of the 21st century , through the international adoption of different DTV standards in the different continents of the planet, as countries and companies providing these services took a step forward towards overcoming the analog.
There are several types of digital television, which are:
Digital television presents a series of interesting innovations compared to the traditional one, such as:
Digital Television, in its numerous presentations, operates based on the use of the radio spectrum or the physical means of connection to transmit much more information than what was done analogically, by means of image and sound coding mechanisms that maximize quality and the reception speed.
Thus, the available bandwidth is used to transmit numerous packets of compressed information, instead of an uncompressed signal that occupies it all. A flow of up to 20 Mb can contain 4 or 5 different programs, in a single transmission channel, without the retransmission of information, which would go from the device to the operator.
For this, the only necessary incorporation into ordinary televisions is a decoder , which interprets and decompresses the data packets and retrieves the signal directly to the display device.
Analog or traditional television, unlike DTV, does not use a binary coding but analog, that is, similar to the electric one, highly susceptible to the noise caused by the environment and sabotage the sharpness of the transmission, especially in the signals Open radio (UHF and VHF).
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