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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]
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 (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).
Two competing high-definition (HD) optical-disc formats, HD DVD and Blu-ray, were introduced in 2006. The HD DVD format, promoted by Toshiba, was backed by the DVD Forum, which voted to make it the official successor to DVD. Opposing HD DVD was the Blu-ray format, led by the Blu-ray Disc Association, which shares many members with the DVD forum ...
For Blu-ray discs, 1× speed is defined as 36 megabits per second (Mbit/s), which is equal to 4.5 megabytes per second (MB/s). [7] However, as the minimum required data transfer rate for Blu-ray movie discs is 54 Mbit/s, the minimum speed for a Blu-ray drive intended for commercial movie playback should be 2×. The fastest Blu-ray speed is 16×.
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. The plastic disc is the same size as DVDs and compact discs. [24] Blu-ray was officially released on June 20, 2006, beginning the high-definition optical disc format war, in which Blu-ray Disc competed ...
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Blu-ray Disc titles can combine standard definition video with high definition audio tracks. [4] [5] Lossless audio is more practical and flexible on Blu-ray than on DVD, which only supports lossless PCM in 48 kHz stereo and requires a relatively large amount of data, leaving less storage space available for the video. In contrast, Blu-ray ...