DVB-T2 is the standard for digital television. And the prefix T2 means that this is the second generation from the general group. It was created based on the present generation standards in order to increase the overall performance of television networks by 50%. And at the same time their quality and reliability. That this is DVB-T2 will be discussed in this article.
Description
This standard is very different from previous versions. This means that receivers of older versions do not support it. DVB-T2 is characterized by QPSK, 16 QAM, 64 QAM, and 256 QAM modulations. Depending on the application of one or another, the maximum speed of the digital stream can vary from 7 to 50 megabits per second.
The system structure is based on the transmission of a transport stream of the MPEG-TS type. At the same time, several streams can be transmitted simultaneously through the DVB-T2 standard. For this, a special data preprocessing system was applied.
Development
At the dawn of television, the most popular standards were NTSC, Pal, and SECAM. They were responsible for color coding. During the development of television systems, some of them died out, and some live and are still in use. With the global transition of television to digital, these standards are gradually disappearing into oblivion.
The main reason for switching to digital television was the ability to compress data using the MPEG algorithm, thereby significantly increasing the characteristics and quality of the transmitted signal.
Today in the world there are several generally accepted standards specific to each region. DVB and derivatives are used in Europe, ATSC is used in America, ISDB and DTMB, respectively, in Japan and China.
Key Features of Digital DVB-T2
These include:
multi-channel multiplexing, that is, combining several channels into one digital packet;
display in standard definition, high definition and ultra high definition;
3D television display;
display video on demand;
TV guide
Teletext
Dolby Digital sound
date and time synchronization;
broadband internet access.
DVB-T2 format signal receiving system
This type of signal can be received by a special broadcast antenna, which must be connected to special receivers. They can be used as televisions with built-in modules, or individual DVB-T2 consoles or tuners. They, as a rule, need to be bought separately.
Digital tuner DVB-T2. What does this mean?
When switching to digital television, many users stop at the choice of technical devices for displaying it. The DVB-T2 module may or may not be present on the TV. When buying, you should pay attention to this in modern realities. Of course, most innovative TV models already have a built-in DVB-T2 module. What does this give in practice? This means that when broadcasting digital terrestrial television, the user does not need to buy additional devices such as receivers or tuners.
Overview of DVB-T2 Receiving Devices
In today's market there are lots of devices that support the DVB-T2 standard. Among them, there are already ready-made solutions that go immediately built into the TV or in a separate version, the so-called tuners or receivers. They are also sometimes called digital DVB-T2 consoles.
TV sets
The ability to work with the DVB-T2 format has a line of TVs Samsung, LG, Sony and many others. It makes no sense to specifically describe the characteristics of TVs, since the DVB-T2 TV standard is either present or not. Of great interest is the review of consoles.
BBK SMP 243 HDT2
The most ordinary digital TV tuner. It is made in the form of an external unit, which is installed next to a device, such as a TV. It can work both with the new DVB-T2 digital television standard and with the older DVB-T. Among the features we can single out support for several high-definition video standards, among which there are 720p, 1080i and 1080p. There is a teletext mode, recording timer and delayed viewing. For outputs of audio and video data there is an audio output, HDMI and standard composite. The cost of the device does not exceed 1000 rubles.
Oriel 794
Digital tuner supporting 720p and 1080p high definition signal reception modes. It has outputs for audio, HDMI, SCART and composite. It has its own display on which channels and other information necessary for the user are displayed. Can display teletext if supported by digital channel. Able to record video and display it in pending viewing mode. The cost of the device ranges from 1200 to 1600 rubles.
Avermedia Technologies Avertv Hybrid Volar T2
External TV tuner with a large list of features. Actually, its cost varies from 4,500 to 4,900 rubles. It has, like other examples, an external display. It can record video in MPEG 1 and 2 standard. It supports high-definition video formats 720p, 1080i and 1080p. It can also be connected to tax television with Pal, SECAM, NTSC standards. Audio output, s-video output and composite are used for data output. Teletext features, video recording and delayed viewing are present.
This device is mainly intended for use on computers. Therefore, there are system requirements for the PC. A processor of at least Pentium 4 with a frequency of 2 GHz is required. At least 256 MB of RAM and a USB port, since the tuner is connected with it. Also required is Direct X Version 9 installed in the operating system.
Rombica Pro DVB-T2
A very compact DVB-T2 tuner that connects to a computer. Therefore, made in the form of a small flash drive. Able to display video in high definition 720p, 1080i, 1080p. It can also record videos in various formats. Equipped with a remote control to switch channels from the sofa. The cost of the device does not exceed 3 thousand rubles.
What gives the transition to DVB-T2
Firstly, it is worth noting the excellent signal quality. Unlike analog, digital television is either there or not. An analog signal may have a smooth transition from a good picture to a bad one.
You can use a much larger number of channels in the same frequency resource. In the so-called package, you can now place several programs at the same time, from 6 to 18.
A distinctive feature of the DVB-T2 signal is the fact that it is not susceptible to noise. That is, in areas where the analog signal was difficult to receive, DVB-T2 will work much more efficiently.
Now you can broadcast the channel in high definition HDTV. The quality of such a picture is really amazing.
The DVB-T2 standard has another interesting feature. It can be taken in motion. That is, receivers, tuners and TVs with DVB-T2 modules can now be installed on vehicles and receive television channels.
Conclusion
So what is this DVB-T2? This is a new innovative standard, which greatly increases the ability to transmit data on television channels. High definition, acceptable levels of signal reception, higher speed, less equipment for reception and many other useful nuances. With the advent of DVB-T2, a new era of television begins. It remains only to wait for the complete transition of all broadcasting companies, as well as users to this single standard.
It is worth noting that in Russia the development of the DVB-T2 standard is proceeding at a significant pace. Many cable providers are constantly expanding the list of channels in HD. Television and radio companies are gradually moving behind them. Now even being in the outback of the Russian Federation, you can use new technologies to watch television. In extreme cases, you can use a satellite dish with support for DVB-T2.