4k blu ray wikipedia

Optical discs under this standard also support up to GB of data.

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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.

High-definition television High-definition video Ultra-high-definition television.

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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.

4k blu ray wikipedia

In contrast, standard HDR10 only makes use of static metadata, which sets the same brightness and tone mapping for the entirety of the content. The case size is the same as that of a normal Blu-ray disc. This also means that each revolution of such a disc transfers more data than that of a standard Blu-ray Disc, which means the transfer rate is higher with the same linear velocity. In addition, the disc can be encoded to have the drive hold the full 5, rpm until it reaches a point slightly away from the innermost part of the disc if an even higher transfer rate is needed. AACS 2. On January 23, , the BDA spec v3. 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. Subtitles use Presentation Graphic Stream , which is the same format as normal Blu-ray discs.

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Retrieved January 14, Business Wire. Categories : Digital imaging Film and video technology Ultra-high-definition television. The following pages on the English Wikipedia use this file pages on other projects are not listed :. Contents move to sidebar hide. Archived from the original on August 28, The first known attack relied on the trusted client problem. December 11, Audio, video, and other streams are multiplexed and stored on Blu-ray Discs in a container format based on the MPEG transport stream. Retrieved February 10, The information density of the DVD format was limited by the wavelength of the laser diodes used. No pages on the English Wikipedia use this file pages on other projects are not listed. Hugh's News. For video, all players are required to process H.

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.

Please note: The public domain status of this work is only in regards to its copyright status. Archived from the original PDF on January 15, Toggle limited content width. Retrieved February 28, Kinescope Electronicam kinescope s Electronic Video Recording Archived from the original on March 10, Initial Blu-ray Disc titles often used MPEG-2 video, which requires the highest average bitrate and thus the most space, to match the picture quality of the other two video codecs. In , televisions capable of displaying UHD resolutions were seen by consumer electronics companies as the next trigger for an upgrade cycle after a lack of consumer interest in 3D television. Retrieved April 24, Archived from the original on February 23,