A digital television decoder is used to decode and receive the digit, which initially represented a primitive device. Today, it is a receiver, which is also used to control digital television. This article will help you find out what a decoder is, what set-top boxes exist, and how to make a good choice.
Understanding broadcast standards
Digital television is not a technology or broadcast option, but a standard, i.e., transmission method. In digital television, the image is compressed into a DVB format signal that can be broadcast, transmitting less information.
In total, there are several digital broadcasting standards by which it is determined which decoder is needed:
Satellite TV (DVB-S). It appeared the very first among all broadcast formats. Unlike other standards, DVB-S was decoded by full-fledged set-top boxes from the very beginning. Even before the advent of digital, satellite television suppl with a receiver. Today the second generation of digital satellite TV (DVB-S2) is in operation.
Cable TV. Broadcasts according to the DVB-C standard. Unlike other digital formats, it is transmitted by wired technology over cable. Weak and simple set-top boxes represent decoders for cable TV for decoding the signal. The primary television control is performed from the TV.
Broadcast TV. Information transmission using analog broadcasting technology, i.e., using a terrestrial repeater and a UHF receiving antenna. Broadcasting occurs according to the DVB-T standard for receiving free TV, and the signal also needs to be decoded. Interestingly, modern TVs have a built-in TV tuner for decoding this signal. Today, the DVB-T2 standard is in effect, according to which broadcasting is carried out in Full-HD and 3D format.
Also, digital broadcasting occurs in the IPTV version using the wired Internet. But in this case, the information comes directly in MPEG-4 format and is not pre-encoded. Therefore, it does not need a receiver.
What to look for
There is a wide variety of digital decoders on the market, from simple digital receivers to intelligent set-top boxes. Each device is endowed with several functions and parameters, which for ease of consideration can be grouped into two categories:
Required parameters. These include the device’s technical characteristics, which are necessary for the whole operation of digital television.
Additional functions. They are designed to improve the broadcast quality and increase comfort, but they are not mandatory criteria. Watching television in digital is possible without them.
When choosing a digital decoder, you need to adhere to several parameters