The difference between cd and dvd

optical discs

Optical disc, known by several names in the computer world, such as optical disc and storage disc, which is a means of reproducing audio and video, and has a circular and flat shape made of polycarbonate. A rounded track format with a sequence in storage, and one of the types of optical discs is CD and DVD, but the user must distinguish between these types before starting to use them in order to be in line with his requirements.

CD disc

Compact Disc, which is a compact disc or what is called a compact disc, is one of the types of optical discs used to save and store data, and its area extends to approximately seven hundred megabytes, and digital signals are the original used to store sound in it, and the manufacturer coats the side on which the information is stored with a layer of aluminum And it relies on recording data on laser beams in the form of paths with a very narrow spiral shape, and the width of one path extends to 1.6 micrometers.

CDs contain information that cannot be modified, as the user can only read without writing to them, and this information comes as part of the CD, but there is a storage capacity ranging from 184-900 MB, and there is a type of CD that is made specifically for read-only, and it is those Which bears the phrase “CD-ROM”, as the user cannot benefit from this type of data storage, including what is intended for recording digital audio CD-Audio.

DVD

Digital Video Disc, known as a digital video disc or a Digital Versatile Disc, which is a type of optical disc used as a means of storing data, and this type of optical disc is characterized by the ability to save movies of high quality in terms of clarity and sound, despite the great similarity Between this type of disc and CD-ROM in terms of measurements, there is a difference in terms of coding density. DVDs are divided into types according to their use, including: DVD-R, DVD+R, DVD-RW, DVD-RAM, DVD-ROM.

The difference between CD and DVD

The difference between CD and DVD is that the capacity of the CD ranges between 650-700 MB, while the DVD reaches 4.7 GB, which is seven times more than the CD, and in terms of the possibility of recording, the user can record on the CD through the so-called CD-RW units. Reading and writing. DVD is the product of merging two compact discs together in a technical manner. The two types of optical discs, CD and DVD, differ in terms of price, as the latter is the most expensive, with a rate that rises almost ten times.