By now you probably have heard of the Blu-ray or Blu-ray discs and players, but you know how this technology is high-definition came to be born or developed? This is a fascinating story with some great battles thrown in large part, a history that is worth reading even if you do not addict technology.To really understand, Blu-Ray, you have to go back to the early 80’s, when compact discs or CD-ROMs were introduced. The CD-ROM was a giant step if you compared with the current media at the time, mainly because the CD offered more storage, better sound quality and quickly became a universal standard for pre-registered recordable and rewritable media. CD was around 650 MB of memory capacity, which was revolutionary at the time to store and retrieve information.However, no technology yet, especially if we consider our insatiable need for more compact storage and picture quality. Thus, we have had introduction of DVDs in the 90-ies, which is 5-10 X increase the capacity of a CD-ROM. DVD has allowed high-quality standard definition video distribution and registration, let alone take into account the wider application. Another key element of this transition is that the specifications for DVD uses the same factor, CD, which allowed for full backward compatibility. These factors will not be lost on the development of next-generation media, Blu-ray disc.Early Blu-ray began in mid-années’90 ‘S with the introduction of HDTV sets. Consumers probably do not have the media capable of recording or playback of high definitioncontent. There was no way to keep HD codecs, except for JVCs Digital Video and Sony HDCAM, but nothing like the practice of CD and DVD.However, it is known that using lasers with wavelengths shorter than you can build optical storage with high density. With this knowledge, Shuji Nakamura invented the blue laser diode. Commercial operation was postponed for a patent in court, but ultimately Blu-ray disc is available and the next step in the evolution of media has begun.The difference: The advantages of Blu-ray to DVD.While the Blu-ray the same physical size DVD or CD, they are capable of storing and reading a lot more data. The reason is to use a blue laser, unlike the red laser used by DVD and CD. The blue laser has a shorter wavelength, smaller aperture lens and a thin layer coating on the disk, which creates a smaller spot beam capable ofstoring and playing a lot more data on disk.Of course, no discussion would not be complete without mention of the heated battle between two technologies: Blu-Ray against HD-DVD. Each disc formats are major donors for the Blu-ray in Sony, Dell, Hitachi, Hewlett-Packard, Panasonic, Pioneer, Philips, Samsung … and support for HD-DVD, we Toshiba, NEC and a number of major film studios Universal Studios, film company Paramount Pictures, Warner Bros and New Line Cinema.While many believe, Blu-ray has won the battle, and probably will be the main technology of high-definition. (Beta someone else?) The main argument in warehouses as well as Blu-ray has 25 GB on a single layer and 50GB for dual-layer, which is compared to ‘HD-DVD, which gives a single layer 15 GB and 30 GB dual layer.Blu-ray is the strongest card to play, a single layer Blu-ray disc can store 25 GB of data. That compared with 4.5 GB on a standard DVD. As mentioned above, dual Blu-ray disc can hold 50 GB. This allows for the storage disks to capture the full high-definition 1080p picture. It has a resolution of 1920 by 1080 pixels progressively scanned. DVD standard 720 x 480 pixels. Another advantage of Blu-ray is its carrying capacity is significantly greater than DVD. It can give signals at speeds of up to 48 Mbit / s. This is 6 times faster than DVD of 8 Mbps.Also, do not forget your old DVD will not be outdated as the Blu-ray player can play DVD. Blu-ray high-goal players are regular DVD standard-definition images and convert them to a higher resolution, which is necessary for high definition TV. This process improves the picture quality, even if it did not increase the resolution. The quality of players zoom function is often the determining factor in the quality of the image is transformed.Given all these elements and characteristics, the future of Blu-ray looks really bright. Blu-ray discs and players will probably be around for some time, or until another more advanced technology takes its place! But now we can all enjoy superior performance and image Blu-ray offers.

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