DVDs have become very popular throughout the world over the past 10 years. DVDs are optical disc storage devices that may be used for storing data on. This data may include movies that have a high video quality, along with advanced stereo audio quality. DVDs look similar to CDs or compact discs as their physical characteristics are the same.
DVDs are thin, flat circular polycarbonate discs coated in aluminum, but they are encoded in a different format from CDs and also at a much higher density. All DVDs must also have a file system in them. The file system is known as UDF and it is an extension of the ISO 9660 Standard used for Data CDs. DVDs became popular as an alternative to watching movies and concerts on video tapes because of their small size and compactability. They became even more popular when people could start recording and editing their own DVDs.
Many people download images, photographs and videos onto DVDs through their computer system and use the discs as storage and playback devices. DVDs are available in various sizes, formats and memory sizes. They are also used for assorted functions dealing with audio and video and generally cost a few dollars each.