A DVD is physically similar to the more familiar CD (compact disc). The diameter of a DVD measures 120 millimeters or 80 millimeters. But the gap in their creations – in 1970, CDs and DVDs in 1990 – provides a clear difference. DVDs can store data – recorded film – with a higher quality sound and video. Parallel to that, has a memory that at least seven times larger than a CD.

For several years, the DVD is stored digitallyin an attempt to save the industry of celluloid from the curse of piracy. It was common for DVDs, a built-in encryption, known as the CSS. Today you can find DVD player with the chip, the 'unlock' a DVD – in other words, the DVD may not be copied, in view.

Ironically, in 2001 it took 16 years, Jon Johansen of Norway, have a software program to break the seemingly impenetrable CSS. DeCSS, since the software was subsequentlyBrands, computer users can rip the luxury of "a facsimile of the original DVDs of digital content on the hard drive of your computer. In the past there have been many obstacles for anyone to copy DVDs. A few years ago, the units that could write data to blank DVDs are the prices of luxury. Even my DVD space was expensive, since they were priced higher than that of a DVD movie in a store.

Today, DVD-burning software devices for less than $ 30 will be acquired. The average priceis about $ 70, and blank DVD discs for less than $ 1 when purchased in large volumes to come. Currently, the market is, with a plethora of software for copying DVD-strewn that allows you to copy from VHS to DVD, DVD to DVD, DVD, CD, et al. The youngest participant in the market seem to be dual-layer DVD with a capacity to copy the entire DVD. In other words, there is no need to compress the data or for the production of feature copies.