Blue Ray Discs
Posted in General on 07/31/2009 01:32 pm by AMAUserBlue ray discs are the newest intervention in technological sphere. This latest optical disc system is a remarkable creation of the BDA (Blu Ray Disc Association) which consists of TDK, Thomson, Sharp, Pioneer, Philips, Mitsubishi, Sony, JVC, Panasonic, Samsung, Apple, Hitachi, LG, Dell and HP. The Blu Ray Disc Association comprises one hundred and eighty of the globe’s frontline PC makers, media and consumer electronics producers.
Just as the name denotes, the blue ray discs use a blue-violet laser to access data as against the existing technology of red laser. A blue-violet laser (405nm) possesses very shorter wavelength than a red laser (650nm), thus enabling the focusing of the laser spot with exceptional accuracy. 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 can store up to 27GB of data which is more than 2 hours of high-definition video and 13hours hours of standard 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 additionally permits the rewriting, recording, playing and distribution of HD videos. The blue ray discs have been founded on the bare disc physical form factor which makes it compatible with CDs 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 have a higher data transfer rate of 36Mbps than the DVD’s of today that transfer data at the speed of 10Mbps. 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).