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Blu-ray (Blu-ray Disc or BD) is a digital optical disc data storage format designed to supersede the DVD format. It was invented and developed in 2005 and released worldwide on June 20, 2006, capable of storing several hours of high-definition video (HDTV 720p and 1080p).
DVD players cannot play Blu-ray discs due to using different wavelength lasers (Blu-ray discs use a blue-violet laser, hence their name, rather than a red laser). However, Blu-ray players are typically backwards compatible, meaning they will play DVDs. Some are compatible with CD and other disc formats.
The American DVD Copy Control Association also requires that DVD player manufacturers incorporate the Regional Playback Control (RPC) system. However, region-free DVD players, which ignore region coding, are also commercially available, [2] and many DVD players can be modified to be region-free, allowing playback of all discs. [3]
In 2012, Vudu partnered with UltraViolet, an industry-backed digital locker offering online streaming of retail DVD and Blu-ray disc purchases. [15] In 2014, Vudu also joined Disney's competing Movies Anywhere initiative. [16] In February 2020, it was reported that Comcast (via NBCUniversal) had entered talks into acquiring Vudu from Walmart. [17]
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]
Blu-ray Disc authoring; Blu-ray Disc; Blu-ray Disc Association; Blu-ray Disc recordable; Blu-ray Region Code; CBHD Based on HD DVD format. Comparison of high definition optical disc formats; Digital rights management; HD DVD; HD NVD; High definition optical disc format war; Optical disc; PlayStation 3; PlayStation 4; Xbox One