Basic Information on DVDs

By stickjohn123 on January 21, 2011 In Business

DVD is an acronym for Digital Video Disc or Digital Versatile Disc. It is an extremely popular media format which uses optical methods of data storage. It saw its origin by the combined efforts of companies like Philips, Sony, Toshiba and Time Warner in the year 1995. DVDs are supposed to be an advancement in the technology of Compact Disc’s. Even though of the identical dimension, DVDs are able of storing data many folds than that of CD’s. Here, in this post, let us know something about the history of DVDs and the technology involved in them.

After the advent of CD’s in the early 90’s there have been many research conducted on the enhancement of the technology by different companies seeing the extensive opportunities before them. Companies commenced to have cold war about the different formats of disc’s which they were bringing up. It is in this scenario that Philips and Sony, two of the giant organizations in the market, came into an understanding and decided to work with each other. Later, Toshiba and Time Warner also came into the forefront and as a result of their works, the first DVD formats were officially launched by Toshiba in Japan in the year 1996.

The storage of an ordinary Compact Disc is 700 MB. For DVDs the typical, standard storage area is 4.37 GB, which is a little more than 6 times the capacity of a CD. There are also DVDs with storage as low as 1.36 GB to storage as higher as 15.90 GB. The biggest acceptance for the new technology of DVDs have been from the music industry and the VHS industry. Heavy and large video tapes had been shortly replaced by light and small CD’s and DVDs.

As opposed to the 780 nm wavelength laser diode light employed for storing in CD’s, DVDs use 650 nm wavelength. This is the explanation for the enhanced capacity of DVDs as it gives more space. The variations of DVDs are determined in the way of storage in them. There are DVD ROM’s (read only memory- which have information which can only be read), DVD R’s (which are recordable), DVD RW’s (which are rewritable) and DVD RAM’s (random access memory- another form of rewritable discs).

Blue Ray Discs and HD DVDs are the successors of DVDs, with increased storage capacities. Blue Ray is the one which is dominating though, with storage up to 50 GB. Great developments are taking place in the industry all over the world in expanding the capacity of these discs.

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