Ultra-high-definition television

New TVs show very clear pictures.

They use many tiny dots to make an image. These dots are called pixels.

Some TVs use 4K. This means they have many pixels. Other TVs use 8K. 8K has even more dots.

More dots make the picture look very sharp. They also make colors look bright. This helps the image look real.

These TVs can show very fast movement. They can also show many colors. This makes watching shows fun.

It is like looking through a clear window. You can see every small detail.

Ultra-high-definition television, or UHDTV, makes pictures look very clear.

It uses many tiny dots called pixels to make an image.

There are two main types of UHDTV. The first is 4K. It has 3,840 pixels across and 2,160 pixels down. This is four times the pixels of regular HD. The second type is 8K. It has 7,680 pixels across and 4,320 pixels down. This is sixteen times the pixels of regular HD.

UHDTV does more than just add pixels. It also improves colors and light. It uses a color space called Rec. 2020. This helps show more colors than older TVs.

It also has a wider dynamic range. This means it can show very bright spots and dark details better. Some UHDTV can even show 120 frames per second. This helps fast movement look smooth. Researchers in Japan first proposed these ideas. They called the 8K version Super Hi-Vision.

Ultra-high-definition television, or UHDTV, is a way to make video look incredibly clear.

This technology uses many tiny dots called pixels to build a picture. Today, UHDTV includes two main digital video formats known as 4K and 8K. Both formats use a wide shape called a 16:9 aspect ratio. These formats help images look much more lifelike than older screens. They are important because they change how we see movies and shows at home.

How these screens work depends on the number of pixels they use. The 4K version, called UHDTV-1, has 3,840 pixels across and 2,160 pixels down. This gives it about 8.3 megapixels of detail. This is four times the pixels found in standard 1080p HDTV. The 8K version, called UHDTV-2, is even more detailed. It has 7,680 pixels wide and 4,320 pixels tall. This creates 33.18 megapixels, which is sixteen times more than 1080p HDTV.

Many scientists and companies worked hard to create this technology. Researchers at NHK in Japan first proposed these ideas. They wanted a successor to their older Hi-Vision system. In 1995, NHK began developing a system called Super Hi-Vision. Later, in 2000, a company called JVC made the first 4K video projector. By 2001, IBM made the first 4K monitors for computers. These many steps helped move the technology from labs to homes.

There are many specific facts about how UHDTV improves the image. It uses a color space called Rec. 2020 to show more colors. This space covers 75.8% of colors, while older Rec. 709 only covers 35.9%. UHDTV also has a higher dynamic range for better light and dark details. Some systems can even show 120 frames per second to make movement smooth. In 2012, the International Telecommunication Union officially approved these standards. This helped everyone agree on what 4K and 8K should look like.

UHDTV connects to things you might already see in your life. You might have heard of "4K" used for movies or digital cameras. You may also see "Ultra HD Blu-ray" discs used to play high-quality movies. Even the way colors look on your phone or computer is part of this science. As screens get bigger, like the 15-meter-wide screens used during the 2012 Olympics, the extra pixels become very important. This technology makes the world on your screen feel much closer to the real world.

Ultra-high-definition television, often called UHDTV or Ultra HD, is a advanced digital video format.

It provides much higher resolution than standard high-definition television (HDTV). This technology includes two main formats: 4K UHD and 8K UHD. Both formats use a 16:9 aspect ratio, which is a wide rectangular shape. These formats aim to create images that look much more realistic. They represent a significant leap in how digital media is produced and viewed.

The quality of these images depends on pixel density. A pixel is a tiny dot that makes up the picture. UHDTV-1, also known as 4K UHD or 2160p, has 3,840 pixels across and 2,160 pixels tall. This results in 8.3 megapixels of total resolution. This is four times the pixel count of 1080p HDTV. UHDTV-2, or 8K UHD, is even more advanced. It features 7,680 pixels wide and 4,320 pixels tall. This creates 33.18 megapixels, which is sixteen times the detail of 1080p. This level of detail is similar to 15/70 mm IMAX films.

UHDTV improves more than just the number of pixels. It also enhances color and dynamic range. The technology uses a color space called Rec. 2020. This allows for much more color than the older Rec. 709 standard used in HDTV. In terms of the CIE 1931 color space, Rec. 2020 covers 75.8%. In contrast, Rec. 709 only covers 35.9%. The increased dynamic range also allows for brighter highlights. It also provides more detail in the greyscale, which refers to the range of light and dark tones. Furthermore, UHDTV supports frame rates up to 120 frames per second (fps). This helps fast-moving images look much smoother.

The development of UHDTV involved many years of research. In 1986, Sony introduced a light valve LCD laser projector capable of 8K resolution. In 1995, NHK Science & Technology Research Laboratories began developing Super Hi-Vision. This was meant to be a successor to their Hi-Vision HDTV system. In 2000, JVC introduced the first 4K resolution video projector. By 2001, IBM produced the first 4K liquid-crystal displays (LCDs) for computers.

These early steps laid the foundation for modern displays.

Researchers built early prototypes to test these high resolutions. In 2003, NHK, JVC, and Ikegami Tsushinki demonstrated an early Super Hi-Vision prototype. They used 16 HDTV recorders with a total capacity of nearly 3.5TB. The camera used four CCD image sensors to capture the footage.

Later, NHK developed more compact systems using CMOS image sensor technology. These systems were shown at various international conferences between 2005 and 2009. These demonstrations proved that high-resolution video could be captured and managed.

Broadcasting these massive amounts of data required new technical solutions. In 2006, NHK demonstrated a live relay of a UHDTV program over 260 kilometers. They used a fiber-optic network and a technique called dense wavelength division multiplex (DWDM). This allowed for a speed of 24Gbit/s. In 2012, NHK also showed the world's first ultra-high-definition shoulder-mount camera. This camera used a Bayer color-filter array to acquire color components. To handle the massive data rate of 51.2Gbit/s, engineers developed faster analog-to-digital converters. This made the technology much more portable and practical for real-world use.

Global standards were necessary to make UHDTV work everywhere. The International Telecommunication Union (ITU) officially approved UHDTV as a standard in 2012. This established the ITU-R Recommendation BT.2020. This standard included both 4K and 8K resolutions. Other groups also helped, such as the Ultra HD Forum, created in 2015. This forum helps ensure that different video tools can work together. The UHD Alliance also created the "Ultra HD Premium" specification. This specification defines the requirements for resolution, color, and high dynamic range (HDR) performance. These rules help consumers know what to expect from their devices.