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Ultra HD Blu-ray (4K Ultra HD, UHD-BD, or 4K Blu-ray) [2] [3] is a digital optical disc data storage format that is an enhanced variant of Blu-ray. [4] Ultra HD Blu-ray supports 4K UHD (3840 × 2160 pixel resolution) video at frame rates up to 60 progressive frames per second, [ 4 ] encoded using High-Efficiency Video Coding . [ 4 ]
The new discs were to overlay the Blu-ray and HD DVD layers, placing them respectively 0.1 millimetres (100 μm) and 0.5 millimetres (500 μm) beneath the surface. The Blu-ray top layer would act as a two-way mirror, reflecting just enough light for a Blu-ray reader to read and an HD DVD player to ignore. [18]
A 4K Blu-ray Disc player was also released. On January 7, 2013, Sony announced that it would release "Mastered in 4K" Blu-ray Disc titles sourced at 4K and encoded at 1080p. [77] "Mastered in 4K" Blu-ray Disc titles can be played on existing Blu-ray Disc players and have a larger color space using xvYCC.
Though the Blu-ray Disc group did add mandatory managed copy to Blu-ray, they did not add HDi. [25] HD DVD players and movies were released in the United States on April 18, 2006. [26] The first Blu-ray Disc titles were released on June 20, 2006, and the first movies using dual layer Blu-ray discs (50 GB) were introduced in October 2006. [27]
On September 5, 2014, the Blu-ray Disc Association announced that the 4K Blu-ray Disc specification would support HEVC-encoded 4K video at 60 fps, the Rec. 2020 color space, high dynamic range (PQ and HLG), and 10-bit color depth. [87] [88] 4K Blu-ray Discs have a data rate of at least 50 Mbit/s and disc capacity up to 100 GB.
For better compatibility with Blu-ray Disc players AVCHD video can be authored on Blu-ray Disc media as Blu-ray Disc video. Authoring a Blu-ray Disc video title does not require re-encoding of AVCHD audio and video streams. The resultant disc plays in any Blu-ray Disc player, including those that do not explicitly support AVCHD.
Blu-ray or Bluray rips (once known as BDRip) are encoded directly from a Blu-ray disc source (usually from the Region A/USA Blu-Rays) to a 2160p, 1080p or 720p (depending on the source), and use the x264 or x265 codec. [clarification needed] They can be ripped from BD25, BD50 disc (or UHD Blu-ray at higher resolutions or bitrates), and even ...
1080p (1920 × 1080 progressively displayed pixels; also known as Full HD or FHD, and BT.709) is a set of HDTV high-definition video modes characterized by 1,920 pixels displayed across the screen horizontally and 1,080 pixels down the screen vertically; [1] the p stands for progressive scan, i.e. non-interlaced.
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