DVB-T2 is a digital television standard. And the prefix T2 means that this is the second generation from the general group. It was created on the basis of present generation standards in order to increase by 50% the overall performance of television networks. And at the same time, their quality and reliability. The fact that this is DVB-T2 will be discussed in this article.
Description
This standard is very different from previous versions. And this means that receivers of older versions do not support it. DVB-T2 is characterized by modulation types QPSK, 16 QAM, 64 QAM and 256 QAM. Depending on the application of one or another, the maximum bit rate can vary from 7 to 50 megabits per second.
The structure of the system is based on the transmission of an MPEG-TS transport stream. At the same time, several streams can be transmitted simultaneously through the DVB-T2 standard. For this, a special data pre-processing system was applied.
Development
In the early days of television, NTSC, Pal and SECAM were the most popular standards. They were responsible for color coding. In the course of the development of television systems, some of them died out, while some live and are still in use. With the global transition of television to digital, these standards are gradually becomingnothingness.
The main reason for the transition 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, there are several generally accepted standards in the world that are specific to each region. DVB and derivatives are used in Europe, ATSC is used in America, ISDB and DTMB are used in Japan and China respectively.
Main Features of Digital DVB -T2
These include:
- multichannel multiplexing, that is, combining several channels into 1 digital package;
- display in standard definition, high definition and ultra high definition modes;
- 3D TV display;
- display video on demand;
- TV guide;
- teletext;
- Sound in Dolby Digital format;
- sync date and time;
- broadband internet access.
DVB-T2 reception system
A special terrestrial antenna can receive this type of signal, which must be connected to special receivers. They can serve as TVs with built-in modules, as well as separate DVB-T2 set-top boxes or tuners. They usually need to be purchased separately.
DVB-T2 digital tuner. What does this mean?
When switching to digital television, many users stop at the choice of technicaldevices to display 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 it give in practice? This means that when broadcasting digital terrestrial television, the user does not need to purchase additional devices such as receivers or tuners.
Brief overview of devices for receiving DVB-T2
On the modern market there are a lot of devices that support the DVB-T2 standard. Among them there are ready-made solutions that are immediately built into the TV or in a separate version, the so-called tuners or receivers. They are also sometimes called digital DVB-T2 set-top boxes.
TVs
The ability to work with the DVB-T2 format has a line of TVs from Samsung, LG, Sony and many others. It makes no sense to describe the characteristics of TVs in particular, since the DVB-T2 TV standard is either present in them or not. Of greater interest is the review of consoles.
BBK SMP 243 HDT2
The most common digital TV tuner. Made in the form of an external unit, which is installed next to the device, such as a TV. It can work both with the new DVB-T2 digital television standard and with the more outdated DVB-T. Of the features, one can single out support for several high-definition video standards, among which there are 720p, 1080i and 1080p. There is a teletext mode, a recording timer and delayed viewing. For audio and video data outputsthere is an audio output, HDMI and standard composite. The cost of the device does not exceed 1000 rubles.
Oriel 794
Digital tuner capable of 720p and 1080p HD reception. It has outputs for audio, HDMI, SCART and composite. It has its own display, which displays channels and other information necessary for the user. Can display teletext if supported by the digital channel. Able to record video and display it in the mode of delayed viewing. The cost of the device ranges from 1200 to 1600 rubles.
Avermedia Technologies Avertv Hybrid Volar T2
External TV tuner with a wide range of features. Actually, its cost varies from 4500 to 4900 rubles. It has, like other examples, an external display. Can record video in MPEG 1 and 2 standard. Supports 720p, 1080i and 1080p HD video formats. It can also be connected to tax TV with Pal, SECAM, NTSC standards. Audio output, s-video output and composite output are used for data output. Teletext, video recording and delayed viewing functions are included.
This device is primarily designed for use on computers. Therefore, there are also system requirements for a PC. You will need at least a 2 GHz Pentium 4 processor. At least 256 MB of RAM and a USB port, since the tuner is connected with it. Also requires Direct X Version 9 installed inoperating system.
Rombica Pro DVB-T2
Very compact DVB-T2 tuner that connects to a computer. Therefore, it is 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 change channels from the sofa. The cost of the device does not exceed 3 thousand rubles.
What does the transition to DVB-T2 give
Firstly, it is worth noting the excellent signal quality. Unlike analog, digital TV is either there or it isn't. An analog signal, on the other hand, can have a smooth transition from a good picture to a bad one.
Many more channels can be used 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 subject to noise. That is, in those 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 this picture is really amazing.
The DVB-T2 standard has another interesting feature. It can be taken on the move. That is, receivers, tuners and TVs with DVB-T2 modules can now be installed on vehicles and receive TV channels.
Conclusion
So what is DVB-T2?This is a new innovative standard that greatly increases the possibility of data transmission over television channels. High definition, acceptable signal reception levels, 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 TV providers are constantly expanding their list of HD channels. They are gradually being followed by television and radio companies. Now, even being in the outback of the Russian Federation, you can use new technologies to watch television. In extreme cases, you can also use a satellite dish with DVB-T2 support.
