Blu-ray faces competition from video on demand (VOD) and the continued sale of DVDs.
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According to Media Research, high-definition software sales in the United States were slower in the first two years than DVD software sales. Toshiba, the main company supporting HD DVD, conceded in February 2008, and later released its own Blu-ray Disc player in late 2009.
Afterwards, it continued to be developed until its official worldwide release on June 20, 2006, beginning the high-definition optical disc format war, where Blu-ray Disc competed with the HD DVD format.
Sony unveiled the first Blu-ray Disc prototypes in October 2000, and the first prototype player was released in Japan in April 2003. The BD format was developed by the Blu-ray Disc Association, a group representing makers of consumer electronics, computer hardware, and motion pictures. Besides these hardware specifications, Blu-ray is associated with a set of multimedia formats. DVD-Video discs were limited to a maximum resolution of 480i ( NTSC, 720×480 pixels) or 576i ( PAL, 720×576 pixels). High-definition (HD) video may be stored on Blu-ray Discs with up to 1920×1080 pixel resolution, at 24 progressive or 50/60 interlaced frames per second. Triple-layer discs (100 GB) and quadruple-layer discs (128 GB) are available for BD-XL re-writer drives. Conventional or pre-BD-XL Blu-ray Discs contain 25 GB per layer, with dual-layer discs (50 GB) being the industry standard for feature-length video discs. The plastic disc is Template:Convert in diameter and Template:Convert thick, the same size as DVDs and CDs. The name "Blu-ray" refers to the blue laser (which is 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. 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.
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It is designed to supersede the DVD format, capable of storing several hours of video in high-definition (HDTV 720p and 1080p). Template:Infobox storage medium Template:Optical disc authoring Blu-ray Disc ( BD), often known simply as Blu-ray, is a digital optical disc storage format. Optical disc format used for storing digital video and other digital data Template:SHORTDESC:Optical disc format used for storing digital video and other digital data
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