Technology

What is a DVD

A DVD is a disc that allows information to be stored in it to later be reproduced, this disc is of an optical type. Storing in this format allows you to save data, images and sounds with a capacity greater than that of a CD. The acronym DVD stands for “Digital Versatile Disc” , an expression that in Spanish translates to “digital versatile disc”.

Its creation was made in order to start a new digital stage, leaving behind the reproduction through VHS. Its introduction to the market began in 1995 and initially its initials corresponded to the term “digital video disk”.

Characteristics

  1. The capacity of a DVD varies from a minimum of 4.7 GB to 17.1 GB.
  2. Its signal is digital.
  3. It has a standard measurement of 120 mm in diameter.
  4. Stores much more information than a CD.
  5. As a read / write mechanism it requires the red laser.
  6. Allows you to save information with a high level of quality.

According to its re-recording capacity:

  1. DVD-ROM: Read-only, manufactured by stamping
  2. DVD-R: Recordable once
  3. DVD-RW: Rewritable
  4. DVD-RAM: Random Access Rewritable. Performs an always-on data integrity check after write completion
  5. DVD + R: Recordable once
  6. DVD-R: Recordable once
  7. DVD + RW: Rewritable
  8. DVD-R DL: Double Layer One-Time Recordable
  9. DVD + R DL: Double Layer One-Time Recordable
  10. DVD-RW DL: Double Layer Rewritable
  11. DVD + RW DL: Double Layer Rewritable

According to its number of layers or faces:

  1. DVD-5: single sided, single layer. 4.7 GB or 4.38 gibibytes (GiB) – DVD ± R / RW discs.
  2. DVD-9: single sided, double layer. 8.5 GB or 7.92 GiB – DVD ± R DL discs.
  3. DVD-10: two sides, single layer on both. 9.4 GB or 8.75 GiB – DVD ± R / RW discs.
  4. DVD-14: duplex, double layer on one, single layer on the other. 13’3 GB or 12’3 GiB – Rarely used.
  5. DVD-18: double sided, double layer on both. 17.1 GB or 15.9 GiB – DVD + R discs.

DVD Features

The original idea of ​​the DVD was the transmission of images and videos in a high quality, giving the battle to the traditional way of reproduction through VHS tapes. Over time, the creators realized that it could be used for other activities and began to handle it as storage for audio, video, applications, supports, backub, among others.

DVD examples

  • Musical DVDs
  • Movie dvd
  • DVD for image storage
  • DVD to store information
  • DVD for stand
  • Backup DVD
  • DVD for applications
  • For software support

Advantages and disadvantages

Advantage

  • Stores large amount of data.
  • Free up space on computerized devices.
  • You can store audios and videos in a very good quality.
  • It takes up very little physical space.
  • It can be played on multiple devices.
  • With proper storage, it does not degrade or deteriorate.

Disadvantages

  • It needs a physical distribution.
  • Due to its constant updates, not all DVDs are compatible with the new formats.
  • DVD recorders are expensive.
  • Currently there are more efficient devices with greater storage capacity.

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