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DVD Formtas

With the advancement in technology there are number of DVD formats which are available in the market. These formats have helped not only in improving the picture quality but it has also helped in taking the entertainment quotient to the next level. The various formats that are available include Blu-Ray, HD, and Dual layer DVD and so on.
The Blu-ray format makes use of high-definition video and data storage. The disc has the same dimensions as a standard DVD or CD. A dual layer Blu-ray Disc can store 50 GB, almost six times the capacity of a dual layer DVD. The Mini Blu-ray Disc (also, Mini-BD and Mini Blu-ray) is a compact 8cm (~3in) diameter variant of the Blu-ray Disc that can store approximately 7.5 GB of data. It is similar in concept to the MiniDVD.
HD DVD or High-Definition Digital Versatile Disc is a high-density optical disc format designed for the storage of data and high-definition video. HD DVD was designed principally by Toshiba, and was envisaged to be the successor to the standard DVD format. However, in February 2008, Toshiba abandoned the format, announcing it would no longer develop or manufacture HD DVD players.
Dual Layer recording allows DVD-R and DVD+R discs to store significantly more data, up to 8.5 gigabytes per side, per disc, compared with 4.7 gigabytes for single-layer discs. A Dual Layer disc differs from its usual DVD counterpart by employing a second physical layer within the disc itself. The drive with Dual Layer capability accesses the second layer by shining the laser through the first semi-transparent layer. The layer change can exhibit a noticeable pause in some DVD players, up to several seconds.