Oct
9
Blue Ray Discs: Employing a Blue-Violet Laser to Write and Read Information
Blue ray discs are the latest breakthrough in technology. 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 BDA boasts 180 of the world’s leading consumer electronics, media and personal computer manufacturers.
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) possesses very shorter wavelength than a red laser (650nm), thus enabling the focusing of the laser spot with exceptional accuracy. The advantage of this is that, it permits data to be stored in less space since the data can be packed more tightly, which further, allows consumers to fit additional data on the disc even though it may be the same size as a CD or a DVD.
Moreover, blue ray discs afford a comprehensive storage capability. 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 perfect definition of the ultimate user 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. This savings balances out the expenses of adding the protective layer required on blue ray discs which means that the end price cannot be very different from the price of a regular 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. The meaning of this is that it takes just an hour and half to burn twenty-five GB 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).
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Speed [Blu-ray] $7.20 Everything clicked in this 1994 action hit, from the premise (a city bus has to keep moving at 50 mph or blow up) to the two leads (the usually inscrutable Keanu Reeves and the cute-as-a-button Sandra Bullock) to the villain (Dennis Hopper in psycho mode) to the director (Jan De Bont, who made this film hit the ground running with an edge-of-your-seat opening sequence on a broken elevator). This i… |
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