The World in High Def with Blu-ray

DVD movies began to be produce in the 1990's, and they became the dominant home video format sometime around 2000, a position that DVD's enjoy even today. However, with a storage capacity of only 4.7 Gb, home theater users require discs which can hold high definition content, DVD's simply do not have the storage capacity to hold all of that data. Therefore, nine leading electronics companies, including Sony, Samsung, and Sharp, began developing a next generation movie format to hold high definition video to usher in a new era of the home theater. With the so called “blue ray” specifications finalized, the average consumer can now afford to watch movies in high definition.

Comparison

The biggest difference between the DVD (digital versatile/video disc) format and the Blue ray format is that DVD players use a red laser to read data while Blue ray players use a blue/violet laser to read data. Basically, the shorter wavelength of the blue/violet laser means that Blue ray discs can store more data in the same amount of space, resulting in a limit of 50 Gb of data as opposed to 4.7 Gb for DVD. However, this has resulted in the players being much more expensive (at least initially) than DVD players, and adoption rates have been slow because of the following reasons (besides cost).

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