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4K resolution, also called 4K, refers to a horizontal resolution on the order of 4,000 pixels and vertical resolution on the order of 2,000 pixels.[1] Several 4K resolutions exist in the fields of digital television and digital cinematography. In the movie projection industry, Digital Cinema Initiatives (DCI) is the dominant 4K standard.

In television and consumer media, 4K UHD or UHD-1 is the dominant 4K standard. By 2015, 4K television market share had increased greatly as prices fell dramatically during 2014[2] and 2015. By 2025, more than half of US households are expected to have a 4K-capable TV (2160p), which would be a much faster adoption rate than that of FullHD (1080p).[3]


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Projects with this TAG (4)

Active project

4K, the evolution of Television

The prospects for a new way of watching TV

More pixels or best quality pixels? The problems of a higher resolution signal against an improved quality signal. The challenges of Rai and Reserch Centre towards a high technical quality television.

Active project

High Dynamic Range

The evolution of television signal: same definition, best pixels

The High Dynamic Range allows a significantly improved image. The pixels that compose the image are high quality compared to the current pixels, with more information content. The signal reproduced on the new HDR screens is more dynamic and therefore with a much higher brightness, as well as with a superior detail perception.

Active project

DVB-S2X - the DVB-S2 extension for the future of satellite communications

First 4k HEVC satellite transmission using DVB-S2X from Turin

Born as an extension of second generation satellite broadcast standard DVB-S2, the DVB-S2X offers new configurations that provide improved performance in S2 scenarios (DTH, broadband and interactivity, DSNG, and professional applications, contribution and distribution TV), and extends the operating modes to cover new emerging segments such as mobile reception (airplanes, trains, ships, etc.). The new system, based on the excellent technologies of DVB-S2, introduces innovative elements at the modulation, resulting in a more extensive and granular operating range in terms of  signal-to-noise ratio, as well as an increased spectral efficiency thanks to new modulation schemes and spectrum roll-off values. With the DVB-S2X the “channel bonding” is now introduced: 2 or 3 transponder can be used simultaneously, in order to transmit very high capacity streams, enabling the broadcast of UHD bouquets.

The first satellite transmission of a HEVC encoded UHD-4k bouquet, using the new broadcasting standard DVB-S2X, has been carried out on 2014 at the Centre for Research and Technological Innovation Rai in Turin.

Active project

Beyond HDTV

Rai, and in particular the Research Centre, has always contributed to the testing and standardization of new technologies to ensure improved image quality and greater involvement of the viewer in the scene.