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March 2005

February 2005

To Help You Understand What is Ultra HD and What do 4K

What is Ultra HD

Ultra HD, Full HD, HDR, and 4k – the notional diversity of modern digital technology can be confusing. While HD is only for "high definition" and makes it clear that the image quality in the numeric field is generally better than previous analog formats, there are now many different techniques for image representation on the market.

What does it mean that my new TV is 4k capable? How does the image differ from that of a full HD device? Justified questions, because in the subject of image quality, the resolution does not just play a role. We'll clear up. You can also see my other article about choosing better 4k television in more detail.

What is Ultra HD and The different image formats and their meanings

To understand the development of image resolution in the TV and monitor area, a look at the past and the development of the display technology is worthwhile. A tube television, which dissolves according to the so-called PAL Standard, represents its contents with 788 x 576 image points. Thus, a single image consisted of approximately 450,000 individual pixels, which were output in line with 50 frames per second. As a result, there was always a slight flickering and details disappeared especially on giant TVs in the blur of the low image resolution. Today, some screens support up to 8k resolution. This results in a resolution of 7680 x 4320 pixels or more than 33 million image dots. So if you find specific resolution labels on a device, they mean the following:

HD: The device supports an image resolution of at least 960 x 720 pixels. If the lowest resolution of the television standard High Definition television (720p) is meant, the decision is 1280 × 720 pixels.

Full HD: The device resolves with 1920 x 1080 pixels. This is the current most common standard.

UHD/UltraHD 4k: A display of 3840 x 2160 pixels is possible on the device with an aspect ratio of 16:9. The image has both horizontal and vertical double resolution like Full HD and thus about four times the image resolution. Modern devices already have this resolution, and more and more image material is offered in 4k resolution.

UHD/UltraHD 8k: The device can represent up to 7680 x 4320 pixels. This, in turn, corresponds to the four-fold image resolution of UHD 4k. Since the required Bitrate for such an image is at 24 gigabits per second, there are so far little use cases for this technique. ...

So-called curved TV's are a case in point: they have a curved screen surface and should thus involve the viewer even more in the events shown. The screen size itself is usually specified in inches. An inch is equivalent to 2.54 centimeters. A television with a capacity of 50 inches thus has a screen diagonal of 127 centimeters. 

Buy Television: What do you need to know ?

Those looking for a new TV will be able to walk in the shop against a wall of moving images. Then choose a TV with the right size, excellent picture quality, and useful features. 

What to look for when buying a tv

What to look for when buying a tv

1. How big should your television be?

A critical decision when buying a television is the choice for the size of the screen. TV's are available in many different image sizes: from small sizes up to 32 inches (81cm) to giants with a diagonal image of up to 65 inches (165 cm).

When choosing the right picture format, the distance between the television and your seating is decisive: the more significant this viewing distance, the bigger the TV especially if you want use your 4k tv for gaming. Also, people find a range of approximately 2.4 times the picture diagonal of the TV (in centimeters) on average the most comfortable.

Measure at home the distance (in centimeters) between the bench and the intended spot of the television and part that by 2.4. Then you have an indication for the image diagonal in centimeters.

Do you prefer to know it in an inches-the size of TV's is, in fact, standard in inches-proportion than the measured distance by 6. You also can check some review about tv buying guide on a website like or

2. Do you need to buy an Ultra HD TV?

Many televisions in the store are nowadays ' ultra-HD (UHD) ' or ' 4k '. Both terms mean the same and are used interrelatedly.

The display of a UHD/4k TV has 4 times as many pixels as a full-HD TV. With this higher screen resolution, 4k TVs can theoretically show a sharper picture with 4 times as much detail than a full-HD TV. The TV shows or movies you watch should also be recorded in 4k and broadcast. Although 4k is emerging, the offer is still quite limited.

Also, it is quite difficult in practice to always see a clear difference between UHD/4k and full-HD, even if you are very close to the screen. Many people don't always notice a difference.

3. Do you choose an LCD TV or an OLED TV?

Almost all televisions in the store are LCD TVs with LED backlighting, also called LED TV. Besides, there are more and more OLED TVs on the market, and concerning image quality, we often find them at the top of our test. Although there are also LCD TVs that come near or match the image quality, like some qled TVs.

One technique is not necessarily superior to the other in all areas. For example, OLED TV's generally offer a larger viewing angle, but qled TVs can often produce higher brightness.


4. A flat or a curved TV?

A curved television has a slightly curved screen, but from our test, it turns out that this curvature does not do much for the image quality. However, they suffer some more from reflections in the image. It's actually a matter of taste whether such a curved TV is something for you.

What is a good brand of television?
The best-known and best-selling television brands in the Netherlands are Samsung, Philips, Sony, LG, and Panasonic.

But which of these brands is actually a good television brand? How do users appreciate the stations of these brands? We asked more than 3600 members of our Internet panel.

Many users are delighted with their television, each brand gets a spacious enough. Samsung and Panasonic score the highest, followed by LG and Sony. Just below are Philips and Loewe.

5. Smart TV: handy or redundant?

Watch your favorite Netflix series, watch a missed TV show, browse the Web, or rent a movie. It can be with the apps you find on smart TVs. These TVs are connected to the Internet. The apps operate with the TV remote control.

What apps are on the TV varies by TV brand. Besides, apps can just disappear from your smart TV in a few years. Guarantee to the door. Very disappointing! We Think TV manufacturers should take more responsibility for the apps on their TVs.