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Blu-Ray Disc Blu-ray Disc (also known as Blu-ray or BD) is an optical disk storage media format designed to supersede the standard DVD format. The name Blu-ray Disc is derived from the blue-violet laser used to read and write this type of disc. Its main uses are for storing high-definition video, PlayStation 3 video games, and other data, with up to 25 GB per single layered, and 50 GB per dual layered disc. Although these numbers represent the standard storage for Blu-Ray drives, the specification is open-ended, with the upper theoretical storage limit left unclear. The disc has the same physical dimensions as standard DVDs and CDs.
Black Burst A video signal comprising sync and colour burst signals which generate a black image on the screen. It is used to synchronise (Genlock) other video sources to the same sync and colour information. This is important during video editing situations where all video decks and cameras need their video clocks to be synchronised.
Blue Key Blue key generation is a process where a subject is filmed or photographed against a background consisting of a single colour - Blue. The portions of the video which match the blue background are replaced by the alternate background video. This process is commonly known as "keying", "keying out" or simply a "key". The Blue Key process is often referred to simply as 'Bluescreen'. Blue is often used as it is the complementary colour to flesh tone - since the most common colour in most scenes is flesh tone, the opposite colour is the logical choice to avoid conflicts.
Bluetooth Bluetooth is an open wireless protocol for transfer of data over a short distance (using short length radio waves). It was originally conceived as a wireless alternative to RS-232 data cables. Because the devices use a radio (broadcast) communications system, they do not have to be in line of sight of each other. It can connect several devices, overcoming problems of synchronisation.
BNC Connector A type of connector used for high frequency signals including RF signal connections, analog and Serial Digital Interface (SDI) video signals, amateur radio antenna connections, aviation electronics and many other types of electronic test equipment.
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