4k blu ray wikipedia

This article compares the technical specifications of multiple high-definition formats, including HD DVD and Blu-ray Disc; two mutually incompatible, high-definition optical disc formats that, beginning inattempted to improve upon and eventually replace the 4k blu ray wikipedia standard. Other high-definition optical disc formats were attempted, including the multi-layered red-laser Versatile Multilayer Disc and a Chinese-made format called EVD. Both appear to have been abandoned [ citation needed ] by their respective developers, 4k blu ray wikipedia. The fourth layer adds a further 28 GB.

Optical discs under this standard also support up to GB of data. The following file is a duplicate of this file more details :. This file contains additional information, probably added from the digital camera or scanner used to create or digitize it. If the file has been modified from its original state, some details may not fully reflect the modified file. Contents move to sidebar hide.

4k blu ray wikipedia

The high-definition optical disc format war was a market competition between the Blu-ray and HD DVD optical disc standards for storing high-definition video and audio; it took place between and and was won by Blu-ray Disc. The two formats emerged between and and attracted both the mutual and exclusive support of major consumer electronics manufacturers, personal computer manufacturers, television and movie producers and distributors, and software developers. In early , the war ended when several studios and distributors shifted to Blu-ray disc. These format wars have often proved destructive to both camps because consumers, afraid of committing to a losing standard, would refrain from purchasing either. The emergence of high definition players followed the entry of HDTV televisions into the mainstream market in the mids. Consumer-grade high definition players required an inexpensive storage medium capable of holding the larger amount of data needed for HD video. On February 19, , the project was officially announced as Blu-ray , [7] and the Blu-ray Disc Association was founded by a consortium of nine electronics companies. The DVD Forum, chaired by Toshiba , was deeply split over whether to go with the more expensive blue lasers, whose discs initially required a protective caddy to avoid mishandling, making the medium more expensive and physically different from DVDs. Department of Justice to make preliminary investigations. The competing standards had significant differences that made each incompatible with the other. In an attempt to avoid a costly format war, the Blu-ray Disc Association and DVD Forum started to negotiate a compromise in early The Blu-ray Disc's representatives defended the technology. The format war's resolution in favour of Blu-ray was primarily decided by two factors: shifting business alliances, including decisions by major film studios and retail distributors, [37] and Sony's decision to include a Blu-ray player in the PlayStation 3 video game console. Studio alliances shifted over time.

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The 4K television market share increased as prices fell dramatically during [2] and The term "4K" is generic and refers to any resolution with a horizontal pixel count of approximately 4, The terms "4K" and "Ultra HD" are used more widely in marketing than "p". However, some companies have begun using the term "4K" to describe devices with support for a p resolution, even if it is not close to pixels wide. This negatively impacts the rendering of text, making it a bit fuzzier, which is especially noticeable when a TV is used as a PC monitor.

It was invented and developed in and released worldwide on June 20, , capable of storing several hours of high-definition video HDTV p and p. The main application of Blu-ray is as a medium for video material such as feature films and for the physical distribution of video games for the PlayStation 3 , PlayStation 4 , PlayStation 5 , Xbox One , and Xbox Series X. The name refers to the blue laser actually a violet laser used to read the disc, which allows information to be stored at a greater density than is possible with the longer-wavelength red laser used for DVDs. The BD format was developed by the Blu-ray Disc Association , a group representing makers of consumer electronics, computer hardware, and motion pictures. Sony unveiled the first Blu-ray Disc prototypes in October , and the first prototype player was released in Japan in April Afterward, it continued to be developed until its official worldwide release on June 20, , beginning the high-definition optical disc format war , where Blu-ray Disc competed with the HD DVD format. Also, the Association introduced an enhanced variant of Blu-ray for playback of 8K content in Japan. The information density of the DVD format was limited by the wavelength of the laser diodes used.

4k blu ray wikipedia

It took a few years to gain momentum, but 4K Ultra HD Blu-ray is now a firm fixture of virtually all major film releases. The first 4K TVs went on sale back in , but it wasn't until that the first 4K Blu-ray players from Samsung and Panasonic went on sale - alongside, thankfully, an increasing number of 4K Blu-ray discs. Today there are a number of 4K players on the market, you can pick up a 4K Blu-ray film in your local supermarket or online and, as streaming services step up to compete with 4K content, both are getting more affordable by the day. So what is Ultra HD Blu-ray, how can you get it and how much does it all cost? Allow us to provide some answers This format supports a resolution of x , and while the specification is no guarantee that a film was actually shot and edited in 4K it does also offer additional technologies that improve picture quality such as higher frame rates of up to 60fps frames per second and high dynamic range HDR. The majority of 4K discs come with the standard HDR Nevertheless, it's fair to say that Dolby Vision is comfortably the more widely available of the two formats. It's one or the other. Those more affordable models still offer an excellent performance, though, delivering quality that streaming services simply can't match.

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PC World. Archived from the original on March 8, PC Gamer. Digital Trends. Active laser medium Amplified spontaneous emission Continuous wave Laser ablation Laser linewidth Lasing threshold Population inversion Ultrashort pulse. Retrieved May 30, As a direct consequence, cropped versions of this file may require a review of their copyright status. Toggle limited content width. Broadcasters just need to produce a single feed, and the technology allows content to be converted into a format for both legacy screens and HDR screens. BBC Sport.

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BD discs are designed to cope with at least 5, rpm of rotational speed. Retrieved June 2, February 19, Archived from the original on April 19, Archived from the original on December 3, Archived from the original PDF on 22 December Download as PDF Printable version. The Times. In March the forum approved a proposal, which was endorsed by Warner Bros. Archived from the original on August 18, Vijaya Kumar; Hiromichi Kobori eds.