Blue Ray Discs
Blue ray discs are the newest intervention in technological sphere. This new optical disc format is a proud development of the Blu Ray Disc Association (BDA) that include HP, Dell, LG, Hitachi, Apple, Samsung, Panasonic, JVC, Sony, Mitsubishi, Philips, Pioneer, Sharp, Thomson, and TDK. The Blu Ray Disc Association comprises one hundred and eighty of the globe’s frontline PC makers, media and consumer electronics producers.
As the name suggests, the blue ray discs make use of a blue-violet laser to read and write data as opposed to the current technology which uses red laser. A blue-violet laser (405nm) has a far shorter wavelength than a red laser (650nm) making it feasible to focus the laser spot with superior precision. The plus point of this is that it allows data to be held in smaller space as the data could be squeezed in compactly which in turn allows the user to store extra data on the disc even though the disc is more or less the same size as a compact disc or a DVD. Additionally, blue ray discs offer a large storage capacity. A single-layer blue ray disc could hold twenty-seven GB of data which is in excess of two hours of HD video and thirteen hours of normal video. The double-layer blue ray disc could hold fifty GB of data which is 4.5 hours of HD video and normal video in excess of twenty hours.
Blue ray discs are the ideal expression of the last in consumer experience. It further allows the recording, rewriting, playback and distribution of high-definition videos. The blue ray discs have been based on the bare disc physical factor which renders it consistent with compact discs and DVDs.
Blue ray discs are also light on the manufacturers since these are built by injection-molding process on a single 1.1-mm disc compared to the traditional which thereby reduces costs. The costs thus saved are spent on the addition of the shielding layer necessary on blue ray discs with the result that the end price being more or less the same as that of a DVD. Blue ray discs also boasts of an advanced data transfer rate of thirty-six Mbps over the present-day DVDs that does the data transferring @ ten Mbps. This means that it would take only an hour and a half to record 25GB of data onto a blue ray disc.
The conventional DVDs and CDs initially came into the market with merely read-only formats. Anyway, the blue ray discs hope to be introduced in a comprehensive range of formats that is to include –ROM (read-only), BD-R (recordable) and BD-RE (rewritable).
