DVD R
DVD-R is a DVD recordable format that typically has a storage capacity of 4.7 GB, which is considerably more storage capactiy than its predecssor, the compact disc. The DVD-R format was orginally developed by Pioneer in 1997. The technology is supported by more DVD players that are currently used at home.
The reason for the larger storage capacity is through the addition of small pit sizes in the groove sprials of the DVD. These small pits guide the laser when it is being played in the device. DVD-R and DVD+R use different colored dyes to absorb the wavelengths when recording and playing. The ability to copy DVD’s has been a huge addition to the video and media world.
DVD-R discs are actually 2 small discs placed together with an adhesive. One disc contains the guide that the laser passes through and the other is coated with a recording dye and either a silver or gold colored reflector. The discs come paired toegther to prevent sractches which is a common problem of compact discs and DVD’s.
If the DVD is double sided, the user has to flip it to access the information on the other side. This style is common for longer videos or to include additional features such as commentary, extra scenes, deleted scenes or other material that would not typically fit on a single disc. This information is placed on the DVD’s using sophisticated DVD copy software.
DVD-R and DVD+R technology are not directly compatible and this has created a format war within the DVD industry. Some manufacturers have created hybrid drives that can read both in an attempt to satisfy a larger quantity of consumers and suppliers, allowing consumes to view and copy DVD’s with the same device.















