The first channel to transmit on 4K TV is the UHD, and, little by little, it will be added more in 2025. This is possible thanks to the H.265 standard, also known as H.265 or Hevc.
In the world of television and video, There is a language that all devices must understand to communicate: codecs. These are as translators that allow your TV, your mobile phone or your computer to interpret the video and audio signals that you resort.
One of the most important and promising codecs of the moment is H.265, also known as HEVC.
It is a video compression standard that promises to complete the change the way we see television and we consume online multimedia content. Its main advantage is that it sacrifices greater efficiency than the previous codecs, what Mees can transmit high quality videos (such as 4K) with a lower bandwidth.
This codec will allow channels to transmit content in 4K without the need to occupy a lot of space in the radio spectrum. In Christian, this means a better image quality and greater efficiency in the use of resources.
What is H.265/Hevc and how does it work?
H.265, also known as Hevc (High efficiency video coding), A video compression standard that has become the natural successor of the famous H.264/AVC. This codec has a bone designed for greater efficiency in video coding, which means that it can transmit high quality content with a narrower file size or bandwidth.
In a nutshell, h.265/HEVC is like a tetris expert who can put more information in less space. Think about it as a zipper for videos. The 4K image is needed, which occupies a lot, and compresses it in half without being noticed. Therefore, the 4K signal adjusts in the same ‘hole’ that HD used before.
To clarify that H.265/HEVC is not just for television. It is also used for different devices and platforms, such as smartphones, tablets, computers, camcorder, online transmission services and Blu-ray discs.
What does this standard with 4K have to do?
Imagine that 4k is an elephant and H.265 is a Suitase. The problem is obvious: an elephant does not fit. But with H.265, that elephant is “compressed” and gets into a sewing lament, maintaining its real size when it takes it out.
This is how it works: H.265/HEVC is the codec that allows you to place 4K videos (which are huge) in narrower spaces without losing quality. In this case, 4K has 4 times more pixels than Full HD.
That means that a 4K video occupies 4 times more space. If I used the old codec (h.264), a chapter of its series in 4K would be so much that it would go to the helmets to download it. H.265 compresses it in half without being remarkable.
As for how this affects DTT and the transmission, thanks to H.265, television channels can transmit 4K without saturating the antennas, and platforms such as Netflix or YouTube send their internet collapse 4K. Before, you would need an ultra fast connection; Now, with H.265, a decent connection is sufficient, like now.
Add to all this that if the content you observe is not 4K, a rescue will be used. That is, an HD image (1080p) is ‘stretched’ to look 4K (filling pixels). The problem is that it is not as clear as a real 4K, but improves the image on good televisions.
DVB-T2 and H.265/HEVC working together for the future of DTT
In order for television to sacrifice high quality images such as 4K, two importing things are needed: A system that can transmit a lot of information about the air and an efficient way to compress so that they do not occupy too much space. This is where DVB-T2 and H.265/Hevc come into play.
DVB-T2 is the standard that improves the way the TV signal is prayer. Think about it as a wider and faster road where TV data travels. Thanks to this improved road, much more information can be sent with saturating the frequencies used by the antennas.
On the other hand, H.265/HEVC is responsible for compressing the videos. When these two technologies together, the TV can transmit 4K sewing images. The chains compress the video with H.265 and then send it with DVB-T2. Its antenna collects that signal, and its television, if it is compatible, decodes it to show the image in high definition.
In summary, DVB-T2 is the ‘how’ the signal is transmitted, and H.265 is the ‘what is transmitted (ultra tablets). Without both, 4K in DTT would be impossible.
What do you need to see H.265/Hevc in DTT?
- A compatible TV: Not all televisions support this standard. If your TV is old, you may have to buy a new one that admits this codec.
- An external (optional) box: if your TV does not support H.265/HEVC, you can buy an external established box that connects to your TV and can decode the signal.
- A good antenna: to receive the DTT signal in 4K, you need an antenna that is able to collect the signal correctly.
- A decent connection: while H.265/HEVC is more efficient, 4K content transmission still requires considerable bandwidth. Be sure to have a fast and stable Internet connection if you are going to see 4K content through transmission services.
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