Blu-ray, generally known as BD or blue-ray discs, is a next-generation optical disc that has been developed by the Blu-ray Disc Association.  The group consists of leading purchaser electronics giants, PC and media makers, like Philips, Samsung, Sony, sharp, HP, Hitachi and Panasonic, to cite a couple.  The blue-ray recorder format enables recording, re-writing and playback of hi-def video ( HD ).  One major advantage that the technology has over typical DVDs is that it allows for more storage potential.  It can hold up to 25GB on a single layered disc and 50GB on a dual-layer disc.  The technology also incorporates complicated video and audio codes for the ultimate high definition viewing experience.  The name Blu-ray is used as the format uses a blue-violet laser, instead of a red laser as in the case of conventional DVDs.

Another major advantage with Blu-ray format lies in the undeniable fact that the whole technology is backwards compatible.  You can now play your old CDs and DVDs through a BD/DVD/CD compatible unit.  The blue-violet laser has a shorter wavelength than a red laser, which will enable it to focus on a disc area with greater precision.  The data is also packed on the surface of a disc more firmly.  This explains the disc’s capacity to store more data, although it is of the same size as a conventional CD. Blu-ray discs have a maximum capacity of 25GB and dual-layer discs can hold up to 50GB – enough for 4 hours of HDTV.  Like HD-DVD, Blue laser discs don’t require a caddy and the players and recorders will be in a position to play current DVD discs.  Codecs supported by Blu-ray include the H.264 MPEG-4 codec which will form part of Apple’s QuickTime 7, and the Windows Media 9 based VC-1. 
 
Now that the dual layer Blu-ray disc writers have hit the market, it has certainly heated up the war between Blu ray and DVD writers, and each time you go shopping for electronic gadgets you will no doubt be advised to buy one of these two types of products.  In truth, to most of the people, owning dual layer Blu-ray disc writers would represent a major shift up in technology and with Blu-ray discs offering a ton more storage, there is each reason why folk would buy them and thus the requirement will also arise for them to possess dual layer Blu-ray disc writers. 
 
A key reason to think about investing in a Blu-ray player or recorder is to exploit its high definition capacities.  What good is that 50-inch HD plasma television if you can not enjoy your pictures in all their HD glory?  Major film studios support Blu-ray technology with many now releasing films totally in the Blu-ray format.  You will not have to toss your DVD collection either as Blu-ray players are backwards-compatible with DVDs.  Also you aren’t needed to be concerned about your huge DVD collection as a Blue-Ray player is able to run your DVDs too.  So you are free from the responsibility of getting all of your DVDs translated to Blue-ray version.

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