HARD DRIVES

Blue Ray DVDs Are The Future For High Definition TV

This future optical disc format – BRD (Blue Ray DVDs) is a remarkable invention of the BDA (Blu Ray Disc Association) that consists of TDK, Thomson, Sharp, Pioneer, Philips, Mitsubishi, Sony, JVC, Panasonic, Samsung, Apple, Hitachi, LG, Dell and HP.  The Blu Ray Disc Association has the globe’s most prominent manufacturers of PCs, consumer electronics and media.

DVDs, lets face it have its days counted. The necessity for storing HD content is increasing daily in the light of increasing number of people turning to HD television for their latest digital television fare.  However, DVDs are known to support a resolution of 720 x 480 whereas HD content resolutions reach as higher as 1920 x 1080. HD video content uses up a considerable amount of hard drive space too.  Two hours of HD content with data compression necessitates up to 22 GB of storage space while a DVD-18 disc (dual-sided dual-layer disc) has a storage capacity of only 17GB.

The solution to this problem has let to the development of two technologies – Blue Ray Vs HD DVDs – that are now in fierce competition with each to gain market share and become the successor of the DVD.  Though these two technologies are apparently similar to each other, the blue ray DVDs have a slight edge over the other as it boats of a greater amount of storage capacity than the HD DVD. The blue ray discs, as the name suggests, uses a blue-violet laser to read and write data unlike 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 in this is that as the data could be packed compactly it uses less space to store data and that fact lets users to add more data on the disc though the size of the disc is more or less the same as a CD/DVD.

A single-layer HD-DVD disc only store 15 GB whereas single-layer blue ray DVDs can store 25 GB which is more than 2 hours of high-definition video and 13hours hours of standard video. A double-layer High Definition-DVD can store up to thirty GB whilst double-layer blue ray DVDs can hold fifty-four GB which is 4.5 hours of HD video and more than 20 hours of normal video.

For instance, the Hobbit Movie Forum just had a discussion about the news that the Lord of the Rings on Blu Ray would be released this summer with the entire trilogy in high definition and on just three Blur-ray discs.

Blue Ray DVDs are easy on the producers too as they are created by injection-molding procedure on a single 1.1-mm disc in contrast to the traditional injection-molding method on a 0.6 mm (High Definition DVD adopts the same process) which in turn cuts down on the costs.  This savings balances out the expenses of adding the protective layer required on blue ray DVDs which means that the end price cannot be very different from the price of a regular DVD.

Top 10 Hitachi Internal Hard Drive – Amazing Products 2011