Ultra HD Blu-ray
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| Media type | High-density optical disc |
|---|---|
| Encoding | H.265/MPEG-H Part 2 (HEVC) |
| Capacity | 50 GB (dual-layer, 82 Mbit/s) 66 GB (dual-layer, 108 Mbit/s) 100 GB (triple-layer, 128 Mbit/s) |
| Block size | 2 KB sector, 64 KB block size |
| Read mechanism | Diode laser |
| Developed by | Blu-ray Disc Association |
| Dimensions | 120 mm (4.7 in) diameter |
| Usage | Ultra-high-definition video |
Ultra HD Blu-ray is a digital optical disc data storage format that supersedes Blu-ray. Ultra-HD Blu-ray discs are incompatible with existing Blu-ray players. Ultra-HD Blu-ray supports 4K UHD (3840x2160 resolution) video at frame rates up to 60 frames per second. The standard encodes videos under the High Efficiency Video Coding standard. 4K Blu-ray Discs support both high dynamic range by increasing the color depth to 10-bit per color and a greater color gamut by using the Rec. 2020 color space using HEVC. The 4K-Blu-ray specification allows for three disc sizes, each with their own data rate: 50 GB with 82 Mbit/s, 66 GB with 108 Mbit/s, and 100 GB with 128 Mbit/s. 4K Blu-ray technology was licensed in mid 2015, and 4K Blu-ray Disc players had an expected release date of Christmas 2015. Ultra HD Blu-ray uses a new revision of AACS DRM, AACS 2.
On May 12, 2015, the Blu-ray Disc Association revealed completed specifications and the official Ultra HD Blu-ray logo. Unlike conventional DVDs and Blu-rays, the new 4K format does not have region coding.
On March 1, 2016, the BDA released Ultra HD Blu-ray with mandatory support for HDR10 Media Profile video and optional support for Dolby Vision. The first Ultra HD 4K Blu-ray Discs were officially released from four studios on March 1, 2016. These were Sony (six titles: The Amazing Spider-Man 2, Salt, Hancock, Chappie, Pineapple Express, and The Smurfs 2), Lionsgate (four titles: Sicario, The Last Witch Hunter, The Expendables 3, and Ender's Game), Warner Bros. (four titles: Mad Max: Fury Road, The Lego Movie, Pan, and San Andreas), and 20th Century Fox (10 titles: The Martian, Kingsman: The Secret Service, Exodus: Gods and Kings, X-Men: Days of Future Past, Maze Runner: The Scorch Trials, The Maze Runner, Wild, Agent 47, Fantastic Four, and Life of Pi).
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