Blu-ray, also known as Blu-ray Disc (BD) is the name of a next-generation optical disc format jointly developed by the Blu-ray Disc Association (BDA), a group of leading consumer electronics and PC companies (including Apple, Dell, Hitachi, HP, JVC, LG, Mitsubishi, Panasonic, Pioneer, Philips, Samsung, Sharp, Sony, TDK and Thomson). The format was developed to enable recording, rewriting and playback of high-definition video (HD), as well as storing large amounts of data. A single-layer Blu-ray Disc set down hold 25GB, which can be manipulationd to record over 2 hours of HDTV or more than than 13 hours of standard-definition TV. there argon also dual-layer versions of the discs that can hold 50GB. While current optical disc technologies such as videodisc, DVD±R, DVD±RW, and DVD-RAM utilisation a violent laser to read and write data, the newborn format uses a blue-violet laser instead, hence the name Blu-ray. in spite of the different type of lasers used, Blu-ray prod ucts can easily be do backwards compatible through the use of a BD/DVD/CD compatible optical pickup and seize playback of CDs and DVDs. The advance of using a blue-violet laser (405nm) is that it has a shorter wavelength than a red laser (650nm), which makes it realistic to focus the laser malignment with make up greater precision.
This allows data to be packed more tightly and stored in less space, so its possible to fit more data on the disc eve though its the alike(p) size as a CD/DVD. This unitedly with the counterchange of numerical aperture to 0.85 is what enables Blu-ray Discs to hold 25GB/50GB. Wi th the rapid growth of HDTV, the consumer c! all for for recording HD programming is quickly rising. Blu-ray was designed with this application in judgement and supports direct recording of the MPEG-2 TS (Transport Stream) used by digital broadcasts, which makes it highly compatible... If you want to get a full essay, rule it on our website:
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