Blue Ray DVDs Are The Future For HDTV
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 BDA boasts 180 of the world’s leading consumer electronics, media and personal computer manufacturers.
The days of DVDs are numbered. 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. But, DVDs support a resolution up to 720×480 pixels while high definition content resolutions are as high as 1920×1080 pixels. High definition video content also consumes a lot of hard drive space. High definition content with data compression of about 2 hours duration requires up to twenty-two GB of storage space whereas a DVD-18 disc (dual-sided double-layer) allows a storing capability of seventeen GB only.
The answer to this issue has helped invent two brand-new technologies, namely High Definition DVD and Blue Ray DVDs, which are now locked in an intense battle to clinch market shares and become the successor to DVD. Both these technologies are very similar in nature but the blue ray DVDs have an advantage since these boast a far higher storage capacity than the HD DVD. As the name denotes, the blue ray discs make use of a blue-violet laser to write and read data in contrast to the existing technology which makes use of 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 dual-layer HD-DVD can hold up to 30 GB whereas dual-layer blue ray DVDs can store 54 GB which is 4.5hours of high-definition video and more than 20hours of a standard 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 on sale this summer with all 3 movies 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.
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