Ultra-high-definition televisions proposed by NHK Science & Technology Research Laboratories and the International Telecommunication Union (ITU).Digital video formats which are defined two 4K UHDTV 3840 × 2160 and 8K UHDTV 7680 × 4320
Today's HD TV is 1080p resolution 1920x1080 = 2073600 pixels = 2 MP megapixels
UHDTV 4K is 2160p resolution 3840 × 2160 = 8294400 pixels = 8.3 MP megapixels
8K UHDTV is 4320p resolution 7680 × 4320 = 33177600 pixels = 33.2 MP megapixels
It's bigger than cinema theater screen resolution!
Number of pixels: 7680 × 4320
Aspect ratio: 16:9
Viewing distance: 0.75 H
Viewing angle: 100 °
Colorimetry: Rec. 2020
Frame rate: 120 Hz, progressive
Bit depth: 10/12 bit
Sound system: 22.2 surround sound
Sampling rate: 48/96 kHz
Bit length: 16/20/24 bit
Number of channels: 24 ch
Top layer: 9 ch
Middle layer: 10 ch
Lower floor: 3 ch
LFE: 2 ch
UHDTV SMPTE standard 2036 announced in 2007 for the first time. UHDTV called the levels of the two UHDTV1 (3840 × 2160, or 4K UHDTV) and UHDTV2 (7680 × 4320 or 8K UHDTV) was defined .Before 2011, UHDTV frame rates allow for 24, 25, 50 and 60 frames per second.
In 2011, the ITU-R meeting, the addition was added to a frame rate of 120 frames per second UHDTV.
Initially, NHK researchers had to create your own from scratch UHDTV prototype. With the system in September 2003 showed a 30-minute long test is used to capture images of a series of 16 HDTV recorders. The camera itself, four 2.5-inch (64 mm) CCD with 3840 × 2048 resolution that has just been built with. Both green and red, and blue in each of the CCDs, using the 7680 × 4320 pixels to a spatial offset method. system, Expo 2005 Aichi, Japan, was shown at NAB 2006 and NAB 2007 at the IBC 2006 and IBC 2008 conference, Las Vegas, Amsterdam, The Netherlands, and CES 2009. Demo at NAB 2006 Broadcast Engineering e-newsletter published a review. The ultimate goal of this event is to be used at home for domestic UHDTV between calendar 2015 with 2020 shows, however, can Japan and China in the 2013-2014 time period
In November 2005, NHK, over a distance of 260 km of fiber optic network UHDTV program showed a live relay. Dense wavelength division multiplexing (DWDM), using the 24 Gbit / s was achieved at a total of 16 different wavelength signals.
On December 31, 2006, NHK Osaka (11.4 m) screen, Kohaku Uta Gassen Tokyo 450 year-over-IP showed a live relay. Using a codec developed by NHK, the video Mbit / s and audio 28 Mbit / s Mbit / s. uncompressed, compressed for 20 minutes broadcasts 7-28 180-600 24 Gbit / s compressed storage TB will require roughly 4. Another NHK Open House closed in advertising, UHDTV signal 250 Mbit / s in MPEG2 compressed stream. It uses the 300 MHz to 500 MHz QPSK modulation was the introduction of wide-band modulator and broadcast later. This "air" transmission range is very limited (less than 2 m), but the feasibility of the transmission shows a satellite in orbit 36,000 km.
In 2008, Aptina Imaging UHDTV project especially designed for NHK has announced a new CMOS image sensor. IBC 2008 Japan's NHK, Italian RAI, BSkyB, Sony, Samsung, Panasonic Corporation, Sharp Corporation, and Toshiba at (with various partners) London, Amsterdam conference site, UHDTV showed that the first-ever live broadcast of a joint.
On September 29, 2010, NHK in Japan over the internet pre-release until the partnership and Charlatans, in the form of UHDTV living in England were recorded.
With NHK SHARP May 19, 2011, on 85-inch (220 cm) LCD with 7680 × 4320 pixels, 10 bits per pixel has the ability to direct view display. This was the first direct view of the release is compatible with Super Hi-Vision show
On February 23, 2012, NHK Shizuoka University, they are 120 frames per second (fps) video shoot was developed 8K sensor, said.
In April of 2012, NHK (in collaboration with Panasonic) 33.2 million 0417 mm square pixels (370 cm) screen (7680 × 4320 at 60 fps), has announced a 145.
In April 2012, the four largest Korean terrestrial broadcasting (KBS, MBC, SBS and EBS) in the future, they announced that Seoul channel began broadcasting 66 UHDTV test.   During the announcement, UHDTV technical details are not yet decided. between LG Electronics and Samsung also UHDTV publications will be included in the test.
In May 2012, the world's first ultra-high-resolution NHK showed a shoulder-mounted camera.  by reducing the size and weight of the camera, portability previous prototypes had been developed to make it more maneuverable, so it can be used in a wide range of shooting situations. The single-chip sensor, only one color component per pixel, a Bayer color filter array uses won. NHK researchers also developed a high-quality up-converter, which is the full resolution video output into the other two color components to convert the estimates.
In addition, in May 2012, NHK, this 12-bit color depth with 120 fps video output 33.2-megapixel ultra-high resolution imaging system developed in conjunction with the University of Shizuoka showed. Ultra-high resolution full-resolution broadcasts a large, wall-sized displays are designed for the option to handle these situations so that has been standardized to 120 fps., 60 fps may not be clear there is a possibility of fast moving objects hit 51.2 Gbit / s, a faster analog-to-digital converter, a data rate as high as about $ 4 billion pixels per second sensor output pixel data for processing, and then distributes the output circuit has a high-speed digital signals into 96 parallel channels causes. This is 1.5 (38 mm) CMOS sensor with conventional ultra-high-resolution sensors are smaller and uses less power when compared with the full technical support, and also the world's first ultra-high-definition standard. 
In the UK during the 2012 Summer Olympics, the world's largest publisher of the format to the public, the BBC,  to provide live images exhibited by audiences Games in London, Glasgow, Bradford, who set a trap and 15 meters wide, ultra-high resolution displays.
May 31, 2012 date, Sony VPL-VW1000ES 4K 3D projection, $ 24,999.99 priced consumer prosumer projector is the world's first stereoscopic 3D technology using glasses with a 4K released UHDTV system.
On August 22, 2012, LG 4K UHDTV announced the world's first 3D using the system.
On August 23, 2012, the official ITU-R Recommendation BT.2020 UHDTV format (Rec. 2020) and the standardization of the 4K and 8K resolutions, the International Telecommunication Union (ITU) has been accepted as a standard.