All these technologies are an index that determines the visual perception of an image and have nothing to do with the actual frequency of displaying an image.
Various companies use their own names for a technology that evaluates the quality of displaying dynamic scenes, or, one might say, an artificial increase in the frequency of viewing an image. And it should be noted that artificial(increasing the frequency), since, firstly, all standards stipulate the frame rate that was originally set when recording an image, as described in the article
and the second is the physical capabilities of the matrix for changing frames for a second, which is discussed below. .
- 1080i: interlaced standard at 25, 29.97, or 30 frames per second
- 1080p: A progressive scan standard that allows frame rates of 24, 25, 30, 50, or 60 fps
- 720p: Progressive (non-interlaced) standard that allows frame rates of 50 or 60 frames per second
- SD: standard digital TV 50 or 60 frames per second.
- Analog signal: 25 frames per second.
On the this moment the maximum frame rate even in the newest 1080p standard is only 60 frames per second. Since 2017, new standards have been adopted that will allow video to be transmitted at a frequency of 240 frames per second.
For smoother viewing of dynamic scenes, these technologies are designed. A person, as you know, does not perceive the frequency of 50 Hz as a flicker, but perceives it as a constant component.
To achieve the desired effect, frame duplication technologies are used, for example, 2 identical frames are shown to the viewer each time at an initial frequency of 50/60 frames per second, thanks to which the refresh rate is already 100 or 120 Hz. And if you show 3, then this is already 150/180 frames per second. More on the example of Samsung technology,
Due to the fact that a person at 50 Hz does not notice flicker, he does not care what frequency 200, 400, 800 Hz, all these names are a publicized marketing ploy that allows you to sell more expensive TVs with absolutely no desired functions from the point of view of human physiology. The same electricity we have a frequency of 50Hz, but for some reason no one thought of selling devices that increase the frequency by 2 or more times, which allows you to create softer lighting in the room, since it is completely unnecessary. Let's just say that with an increase in, for example, an indicator of 200Hz, a person will not notice the difference in comparison with 400 or 800.
In this case, 200Hz, 400Hz, 600Hz, 800Hz are marketing names for the same technology and they do not mean at all that your TV shows at this frequency. In technologies, it is stipulated that the TV shows for the viewer with some parameters commensurate with the specified frequency.
For comparison, modern TV screen matrices LCD same typically have a response time of 2 miles of a second. TN matrices are not used in TVs from leading manufacturers, matrices made using IPS technology are mainly used, as they provide the best viewing angles and image quality, and they have a response time of 6-16ms. Read more in the article
But consider the TN matrix as the most ideal option.
1 second-1000 miles seconds divide 1000/2=500 maximum amount frames that a TV screen can display at 500 frames per second. To overcome the laws of physics, manufacturers stipulate that, for example, the screen refresh rate (taking into account possible lawsuits, various names have been invented that do not directly speak about the screen refresh rate, such as MCI, clear motion rate, AMR), an increase, as it were, in the frequency of displaying a picture, is achieved by jointly applying an increase in frequency, special backlight, processor, etc. In modern TVs with a declared frequency of more than 400 Hz, manufacturers do not indicate the response time of the screen matrix so as not to cause unnecessary questions, and in 2013 such a parameter as response time was generally removed from the technical characteristics of the TV.
Plasma panels have a much shorter response time and they practically do not take into account the response time, it is possible to obtain high image refresh rates with plasma.
Increasing the frequency is necessarily used when viewing active 3D, since there is an alternate dimming of the TV screen for the left and right eyes and, as a result, a decrease in the display frequency by 2 times.
Nevertheless, these technologies do visually make dynamic scenes smoother and easier to view, this is achieved not only by increasing the number of frames shown, but also by using special backlighting algorithms:
- turn off the backlight for a short time, which allows you to remove the blurring of the picture.
- strobing of the backlight of a part of the frame, on the TV the screen is highlighted in a certain sequence.
The combination of all these techniques makes the image visually smoother for the viewer.
But all TVs can be divided into 3 groups
- TVs with a real frame rate on the screen of 50 or 60 per second.
- TVs of the middle segment are usually with 3D 120 frames per second.
- Premium TVs (expensive TVs) 240 fps in 2013 is the highest frame rate ever achieved.
What can be concluded: Yes, if you are watching a video with an initial frame rate of 24 per second, then enabling the enhancement function dynamic image indeed it will make it smoother, but if you watch a video with an initial frame rate of 60 per second, then all these technologies will be practically invisible to your perception.
When choosing a TV with a diagonal of more than 25 "" buyers are faced with the need to decide which is better - 50 or 100 Hz? These mysterious hertz are called sweep by some, frame rate by others, and some believe that these are different things. Let's try to figure out what it is.
Actually, it would be more correct to use the name "sweep with a frame rate of 50 (100) Hz". But it's long, so they cut it. In general terms, we are talking about a system for forming an image on a screen, determined by the characteristics of television broadcasting. It is called scanning because the image on the screen is sort of unfolding: the electron beam "draws" the frame, moving from line to line from top to bottom, and along the line - from left to right.
The development of the foundations of television took place more than half a century ago, and since then no particularly significant changes have been made. However, image requirements have grown significantly.
The main characteristics of the TV broadcasting standard in force in Russia: a full image frame consists of 625 horizontal lines, which are transmitted in two stages (the so-called "semi-frames"), in the first half-frame all odd lines are scanned, in the second - all even lines. The lines of the second half-frame (even) are transmitted so that they are placed between the lines of the first (odd). Such a sweep is called interlaced. Several lines in each frame are used to transmit sweep control pulses. Additional information is also placed there: teletext, program codes, etc. Half frames are transmitted at a frequency 50 Hz, that is, 50 times per second, respectively, one half-frame is transmitted in 1/50 of a second, and a whole frame in 1/25 of a second (25 frames per second).
The main disadvantage of the 50-Hz format today is the "flickering" effect when displaying an image on a TV screen. The electron beam "draws" the lines of each half-frame sequentially, one after another, and as a result, when the beam "finishes" the last lines, the first lines of the same half-frame have already faded out. Not only does the image "flicker" at a frequency of 50 Hz, which can already be seen, but also horizontal lines"tremble" with a frequency of 25 Hz. The "jitter" effect is enhanced by the peculiarities of the SECAM color coding system, standard for Russia, the main principle of which is the sequential transmission of color (to put it very roughly, the red component is transmitted in one line, and the blue component in the other). Decades ago, when the foundations of the 50Hz format were laid, these shortcomings were not significant, and TVs were usually small in size. At modern TVs The diagonal of the screen can be much larger, and the larger the screen size, the more noticeable flicker and line structure become.
In addition to all of the above, our perception of the television image is also influenced by computers, or rather, computer monitors with a frequency of more than 60 Hz. With prolonged adaptation (during the working day), the eye gets used to a higher frequency and begins to notice flicker at lower frequencies.
To combat all these shortcomings, two main technologies have been created - progressive scanning and a frequency of 100 Hz.
At progressive scan in one image frame, all lines (even and odd) are displayed at once, which can significantly improve image quality. Progressive scan is more advanced than interlaced, but the main sources of progressive scan video today are only a computer and some models of DVD players.
Inscription "100 Hz" means that this TV can update the picture on its screen at a frequency of 100 Hz, that is, "semi-frames" appear twice as often as with a 50-Hz scan. This can be considered the first step in the development of 100 Hz technology. In order to squeeze the maximum quality out of the existing broadcast format, in addition to the 100-Hz scan, the TV uses digital signal processing system, for example, when with a 100-Hz sweep, each of the half-frames is not just doubled (odd-odd-even-even), but also interleaved (odd-even-odd-even).
How do 100 hertz sweeps and signal processing systems work in practice?
Everything is very simple: take a closer look at the real image, for example, - the announcer in the studio reads out the news bulletin. What changes in such an image? Yes, practically nothing: the studio stood as it was, the announcer sits to himself, not moving much, only his eyes run over the text, and his lips move. What can be improved in such an image?
The digital system can easily, in this case, double the resolution both vertically and horizontally, i.e. between each pair of dots original image it is possible, having calculated, to insert one more. As a result, the image quality improves. In addition, by accumulating frames of such an image, one can easily remove noise that is random in nature. (Digital Noise Reduction).
More complex signal processing systems determine the number of moving and stationary objects in the image, the motion vector of each is determined by calculating from several previous frames, then it remains only to correctly place the calculated new points, create an additional one based on them (at 100 Hz - there should be 2 frames times more!) frame - and watch an image free from flickering, jitter and other interference!
It should only be noted that image processing systems give a very different image in terms of final quality - it all depends on the specific processing algorithm used, the speed of the system, the number of accumulated frames, the quality of the analog-to-digital converters used. The final cost of such TVs is also very different, but, for today, this is the only way to ensure high image quality with an on-air signal. Use as HDTV standard - digital television high definition - in Russia in the next decade, sadly, is not expected.
RESULTS:
1. A TV with a 100 Hz scan must be chosen very carefully, paying special attention to the image processing system used. Different companies implement these systems in different ways, call them differently, and their impact on the image is also different. Here are the names of some digital image processing systems:
| DRC, DRC-MF | Sony |
| D.I.S.T (75hz) | JVC |
| GIGA | Panasonic |
| Pixel Plus, Natural Motion | Philips |
| Hiper Pro 100 | Toshiba |
| DRP | LG |
| Natural Scan, Digital Pro Picture | Samsung |
| DVM 100hz | Thomson |
When evaluating an image, one should pay attention to how the movement of different objects is reproduced - it should be natural, "smooth", without jerks, twitches and "loops". Slightly slanted, almost horizontal lines of the image should not look like a staircase. A slight image noise should not cause a "digital web" - something like digital (small squares) noise, the structure of which does not move with the image, but "lives" separately. Look more closely at the naturalness of the complexion - the faces should not look like "sweaty", there should be nuances in the complexion. There should not be excessive "contouring" of objects: the natural folds of skin on the faces should not look like battle scars. Enjoy the reproduction of small details of the image, such as how the hairstyle looks on the same characters. In order to adequately test and compare the performance of digital imaging systems with different TV sets, it is necessary to supply the signal of the best possible quality (for example, from a DVD player). Sports footage shot with natural light is best suited for image evaluation. It should be noted that a device that passes all these simple tests will cost a lot. Television is, in any case, an illusion, an optical illusion. You just have to decide for yourself which "magician" does his job better.
2. No matter how good the quality digital system image processing, it is based on calculations additional information from the ancient 50 Hz format. It follows that, in order to reduce the likelihood of failures in image processing systems, the signal must be of the highest quality possible to exclude false processing of various kinds of interference and noise, otherwise these noise and interference can only become much more noticeable. It doesn't make much sense to spend money on an expensive TV if you now have a noisy, double edged, etc. picture. Better to buy first satellite system, or tidy up the antenna economy, and then purchase the TV of your dreams.
In discussions of 4K TVs, the subject of refresh rate is constantly raised. There are good reasons for that. On the one hand, the frame rate directly affects the enjoyment of watching video content, whether it be movies or sports video broadcasts.
On the other hand, TV manufacturers themselves confuse buyers with the specific jargon they use to describe this function in specifications. The main problem with their descriptions is that they are either outright fraud or technically incorrect. As a result, even a specialist cannot always understand their descriptions.
This article is written with the goal of cutting out all jargon and marketing terminology in order to intelligibly explain three simple things to the reader: what is frame rate in relation to video, what is “natural” (native) (native) and “improved” (enhanced) frame rate, and what effect both types of scanning have on the quality of the picture that the TV shows.
All current premium 4K TVs, such as the Samsung KS9500, operate at a native 120Hz refresh rate.
What is frame rate?
At its most fundamental level, frame rate is what its name stands for. This is the rate at which your TV refreshes the picture every second. The higher the refresh rate, the smoother and more natural the picture you see on the screen. Frame rate is of particular importance for dynamic video high definition. Each video has a limit to which the frame rate can be increased.
It is important to understand that a TV cannot add "detail" to a video source. All the details are already inside the video, and the TV can only process the signal.
If we take a film being played in a movie theater as an example, then the equivalent frame rate would be 24 frames per second. These 24 frames are then converted into 30 frames for broadcast. The video is then manipulated a bit to produce 60 frames per second, which corresponds to a 60 Hz “sweep” that is the format in which most digital video is released today.
4K TVs are capable of operating in both 60 Hz and 120 Hz modes (60 or 120 pictures per second). Older HD TVs run mostly at 60Hz (many models actually run at 50Hz). Since 4K TVs are expected to be of the highest quality, 60Hz quickly became something of an obsolete technology, and now all 4K TVs support 120Hz.
What is the relationship between frame rate and frames per second of source video?
And of course, another question arises: what happens when you watch a 60Hz video on a 120Hz TV? The TV recognizes a 60Hz source and can then do a few tweaks or "enhancements" to show the correct picture.
Frame interpolation
The first method we'll look at is called frame interpolation, and this technology is used by all modern TVs, including 4K TVs. The essence of this technology is that two or more different videos frame, after which they are superimposed on each other and the result of this operation is shown between real frames. As a result, the picture is a little more blurry.
The next method is called black frame-insertions (BFI). This technology consists in inserting black frames instead of dropped frames. This method allows you to deal with blur when moving in the frame (motion blur).
An example of the BFI method.
What is motion blur in 4K TVs?
Motion blur is a video source problem. Both methods described above are needed to avoid this effect at 120 Hz and 60 Hz. You also need to understand that 120Hz TVs have much better blur control than their 60Hz counterparts. Blurring, as a phenomenon that we perceive with our own eyes, is a composite honor of several factors. First of all, this is blurring, which is characteristic of the type of TV matrix. The second is the desynchronization of the sweep and the number of frames per second. Thirdly, this is the blur that was "fixed" by the camera when shooting.
The TV can't do anything about the blur that was created during filming. Interpolation and BFI are needed to combat the first two causes of blurring. Both ways "trick" our brain so that we see a clearer picture when watching a movie or sports broadcast.
The better a 4K TV can “fit” the picture (24p, 30fps, 60fps) to its 120Hz, the more natural and pleasant it will look. Of course, this also means less judder and less blur. One of the key differences between a good 4K TV and a bad one is how it handles motion pictures. The cheaper the TV, the worse it eliminates the above negative effects.
Great examples of 4K TVs with a 120Hz scan and good blur and judder suppression are Samsung TVs 2015 and 2016 of release, as well as LG OLED 4K TVs, which began to be released this year.
How are refresh rates and PC games related?
4K TVs today are very often used as giant gaming monitors and connected to computers via HDMI.
Most modern 4K TVs work great as monitors because their refresh rates support two things. On the one hand, all the major brands launching 4K TVs in 2015 and 2016 are great at 60fps because of their 60Hz refresh rate. On the other hand, almost all TVs support 120Hz, which makes gaming at 120fps comfortable.
Examples of 4K TV models that are great for gaming at 60Hz are Samsung JU7100, LG OLED 4K EF9500, Samsung SUHD KS8000.
4K TVs that support Full HD at 120Hz are the Sony X810C and X850C.
What do frame rate “improvements” mean for 4K TVs?
Before we continue, remember one fundamental and simple thing that will help you avoid misunderstandings in the future. The sweep frequency can only be 60 Hz or 120 Hz.
Any manufacturer-specified sweep frequency above 120 Hz is the result of more intensive versions of interpolation or BFI. Such "improved" sweeps can be up to 240 Hz. Each manufacturer has a different name for this technology.
If a 4K TV offers a scan rate of 60 Hz, then the “enhanced” scan will be 120 Hz, if the normal scan of the TV is 120 Hz, then “improved” will be 240 Hz. Examples of such sweeps and their names are included in the list, which you can find below:
- Sony Motion Flow
- 120 Hz at 60 Hz native refresh and 240 Hz at 120 Hz native scan
- Samsung: Motion Rate
- sweep
- LG: TruMotion
- 120 Hz at 60 Hz native and 240 Hz at 120 Hz native
- Vizio: Effective Refresh Rate
- 120 Hz at 60 Hz native and 240 Hz at 120 Hz native. Vizio offers a "Clear Action" sweep that doubles the reworked image. The result is numbers like 480 Hz and 720 Hz for 60 Hz or 960 Hz for 120 Hz. These numbers mean nothing and were invented in order to impress a potential buyer.
- Panasonic Image Motion
- 120 Hz at 60 Hz native and 240 Hz at 120 Hz native
Graphs like this trick buyers into thinking there is a sweep above 240Hz. In fact, sweeps above 240 Hz do not affect picture quality in any way.
Conclusion
In most cases, a typical 120Hz sweep will suffice. Some TVs offer excellent picture quality and motion control at 60Hz. The difference between 60Hz and 120Hz will be barely noticeable on a video that is made at 60Hz. Additional motion-enhancing technologies (such as doubling the refresh rate) are a nice bonus in specific situations, such as watching sports, where motion blur adds a sense of presence. All technologies that make the sweep frequency above 240 Hz can be safely ignored.
When we choose a TV, we often encounter such a parameter as the frame rate - Hz. TV manufacturers present their own technology as the best solution on the market LCD TVs, promising us best quality Pictures. And marketers actively use various tricks when calculating the cherished parameter.
AT technical specifications the manufacturer often indicates considerable numbers - 100, 200, 400, 600, 800, 1200Hz and so on.
In this article, we will find out the impact of this parameter on image quality, as well as refute the well-known myths and misconceptions associated with the frequency of the TV.
What is the frame rate of a TV?
Do not confuse LCD refresh rate with video frame rate.
The refresh rate is the number of frames of video content displayed on the TV screen in a period of 1 second. The frequency directly depends on the type of content.
The standard film frame rate is 24 frames per second.
TV content frequency - 50 frames per second (in European countries).
The refresh rate is a parameter that indicates how many frames per second an LCD TV can display, this value will not improve the picture quality in movies.
Where would a higher LCD refresh rate be useful?
For example, when connected to a computer, a 120Hz LCD TV will display smoother animations in Windows. With a supporting video card, you can get a good picture in games.
Why do we need additional Hz?
In old CRT TVs with a screen diagonal of more than 70 cm, at a standard frequency of 50-60 Hz, a strong flicker was observed, which gave additional strain on the eyes.
The reason for this was not the low number of frames, but the peculiarity of the technology itself. Therefore, engineers developed a CRT TV with a refresh rate of 100 Hz. With such a frequency, the picture did not blink, and the eyes did not get tired.
That is why there was a misconception that a TV with a high frequency value does not affect vision.
There is no flicker in an LCD TV with a frequency of 60 Hz, and an increase in the frequency indicator is necessary for completely different purposes.
Technology 100,200,400,800 Hz
The main disadvantage of LCD TVs is the reduction in the resolution of the displayed frame in dynamic scenes.
Dynamic resolution is affected by the response of the matrix, caused by the slow switching of liquid crystals from the current color to absolute black and back. An example of a high-quality display of fast scenes in films would be any plasma TV.
1.Application Led backlight to increase the dynamic resolution - scanning backlight. The easiest method. The effect on the clarity of the picture is noticeable, but at the same time the brightness value decreases and flickering is observed. The benefits of this feature are not clear. Used in budget TVs.
2.Insert additional frames. Technology requires powerful processor, and is used in models of the middle price category.
The impact on the picture in dynamic scenes is significant. There are a number of disadvantages:
- if this function is used when watching ordinary films, then the effect of the performance will appear:
- when creating additional frames, significant artifacts are observed in the form of incorrect frame overlay and afterimage.
3. Combined method. The above technologies and various algorithms for processing, smoothing and eliminating image defects. The best solution. You can adjust the creation of additional frames and the degree of suppression of the motion blur effect separately. Thus, get high performance dynamic resolution in movies (24fps) without performance effect.
The numerical value indicated in the characteristics is the image processing index, the sum of which includes the work of all TV technologies. At the same time, the efficiency of the index does not depend on the numerical value.
Conclusion.
No need to chase the value of the Hz indicator, this is a marketing ploy to sell the TV at a higher price. The quality of the picture depends on the complex of technologies used to improve the image. A frequency of more than 100 Hz makes sense to be on TVs with support for 3D images, in other cases, do not pursue this value.
How to choose a TV?
How to choose
television?
You are faced with the choice of a new TV, but found that the technology
moved forward a lot. To help you figure it out, we've put together
on this page are the main characteristics that you should pay attention to
when choosing a TV.
You are faced with the choice of a new TV, but found that technology has advanced a lot. To help you figure it out, we have compiled on this page the main features that you should pay attention to when choosing a TV.
Trends and technologies 2018
Trends and technologies 2018
Artificial intelligence
Speech recognition technology, which is equipped with LG OLED TV with AI, makes it easier to access content and services - now it's much easier to search for them. The TV listens to your request and considers the answer to it. One simple request and you will feel like you are in a cinema hall even while watching TV. Enjoy the best entertainment content using the capabilities of smart home technologies.
Smart TV
A “smart” TV differs from the usual one in that it can be used to watch movies online without a computer, surf the Internet, play games. In addition, it plays video files and music from a flash card. Furthermore, Smart TVs TVs work in tandem with smartphones: you can play videos and music from your smartphone, as well as remotely control your TV.
On LG TVs, webOS is responsible for Smart TV functions - a progressive operating system with intuitive clear interface, to understand the management of which will not be difficult even for a viewer who is far from modern information technologies.
Magic Remote
A smart TV needs a smart control system, and for LG Smart TV, Magic Remote fulfills this role. This device can work not only as a normal remote control, but also as a wireless 3D mouse.
By slightly moving the Magic Remote in space, you can control the playback of video files, navigating the Internet, or actions in an online game. In addition, the Magic Remote has a built-in microphone that allows you to search for information on the network by voice.
Panel type
The main factor influencing the quality of image transmission is the screen panel technology. There are two types of panels: traditional LED (liquid crystal matrix with LED backlight) and innovative OLED (matrix based on organic light emitting diodes).
LED TV
Standard LCD panels backlit by compact LEDs. LG traditionally uses IPS technology LED - such screens are distinguished by exemplary color reproduction and wide viewing angles
OLED TV
A fundamentally new category of televisions, the pinnacle of the development of television technology. Each OLED pixel is a separate OLED that can glow on its own. Due to this, the image has infinite contrast and the most accurate color reproduction.
OLED delivers over a billion colors - 64 times more than a typical LED - and unparalleled black depth is achieved complete shutdown individual unused pixels.
The viewing angle of OLED is wider than that of LED, and the thickness of the panels themselves is much thinner: flagship models have a screen thickness of less than 3mm. The refresh rate of OLEDs is hundreds of times faster than LEDs, making moving images incredibly clear.
Comparison of NanoCell™ and quantum dot technologies in modern LED panels
SUPER UHD 4K is LG's premium line of LED TVs that differentiates conventional TVs with sophisticated design and enhanced backlighting that enhances this classic technology. Adding additional filtering and polarizing filters to the screen compensates for the shortcomings of traditional LED panels, improving backlight quality and color accuracy; while the LCD matrix itself remains unchanged.
In the recent past, a good reputation among connoisseurs quality image plasma panels were used, and, however, high power consumption and the impossibility of further increasing the clarity left this technology in the past.
quantum dots
The 2016 LG SUPER UHD TVs used Quantum Dots technology. The essence of the technology is that a special layer of crystals of different sizes is placed between the backlight and the matrix - “quantum dots”, which absorbs the excess spectrum from the backlight and makes the backlight more even and of high quality.
Quantum dots have been replaced by nanocells (NanoCell) in LG's latest 2017 SUPER UHD TVs. A layer of nano-particles of equal size (about 1 nm) applied over the LCD panel provides more realistic color reproduction than quantum dots, including when viewed from the side at any angle. NanoCell cells absorb "excess" light waves, preventing color distortion, and also reduce light glare on the screen. This allows you to maintain high picture quality even when the screen is surrounded by many different light sources.
Dimensions
First of all, decide on the right size. Estimate from what distance you will watch TV. Experts agree that the optimal distance for modern TVs is 1.2-2.5 screen diagonals. A distance of 1.2 diagonals will correspond to the middle rows in a conventional cinema, and 2.5 diagonals to the back rows.
Traditionally, screen size is expressed by its diagonal in inches. So, for example, a 43-inch screen has a width and height of 96 and 54 cm, respectively. For convenient conversion, you can use the special converter below.
Diagonal
Screen dimensions W x H
Thus, TVs with a diagonal of up to 35 inches are best suited for the kitchen and small office, bedroom or nursery. optimal size screen 40 — 49 inches, but in the living room for the most comfortable viewing it is better to hang a panel no less than 55 inches in size.
Traditionally, screen size is expressed by its diagonal in inches. So, for example, a 43-inch screen has a width and height of 96 and 54 cm, respectively. For convenient conversion, you can use the special converter located on the left.
Permission
The difference between HD, Full HD and the rapidly growing popularity of UHD 4K (ULTRA HD 4K) lies in the number of dots (pixels) that make up the image and their size. The smaller and more numerous the pixels, the better the picture, since more small details can be seen on it.
The 4K standard provides the highest quality and four times the number of picture elements compared to Full HD. At the same time, even a lower resolution image is shown by 4K TVs better than Full HD models and, especially, HD, since on their screen it consists of a larger number of pixels.
The smaller the elements in the image, the more it needs to be enlarged in order to see in detail. That is why when switching from a Full HD TV to a 4K TV, it is recommended to choose a larger screen.
TV with HDR
*The illustration only schematically shows the benefits of HDR and cannot fully convey the benefits of the technology - most likely, you see it on a normal screen without HDR support.
HDR Technology
HDR (High Dynamic Range) technology - new standard video signal, designed specifically for modern UHD TVs. Technically, HDR is a video format that contains not only ultra-high resolution, but also more brightness and color information for each pixel.
To support it, you need both specially filmed and processed video, and new-generation TVs equipped with the necessary capabilities. This allows you to transmit a much more realistic image on the screen and removes many of the limitations that ordinary TVs rested on. Among the obvious advantages of HDR are an extended range of brightness and a rich palette of colors, which in total gives the viewer a new experience.
2018 LG TVs with Active HDR play HDR10 and HLG content. BUT latest models LG OLED and SUPER UHD support Dolby Vision premium cinematic format
This should not be confused with the HDR effect in the world of photography: if there, from several “ordinary” shots with different exposures, they create one shot with an imitation of an extended dynamic range, then the situation is reversed on TVs. The footage is initially shot in a special HDR format, and then it naturally leads to a more realistic image output.
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