What is a compact disc (CD)
What is a Compact Disc (CD) Almost all of us should use a CD or DVD in our lives. Because talking about a few years ago, whether it was your favorite song or movies, only a CD or DVD was used to store everything.
But do you know what this CD or CD is? What are its features? And many more questions that you may not know. After the floppy disk, the CD was a storage device that could be carried easily from one place to another and was also easy to store.
In the event that there was very little space on the CD, only songs were stored in it, while movies and films were also stored due to the increased space on the CD along with songs and videos.
Many people still do not know anything about it, so today I thought why you should be given complete information about what a CD is and what its features are, so that you can get these types of storage devices. You can get complete information about the topic, which can help you understand more storage devices. So let’s get started without delay and finally find out what is cd and
What is a compact disc (CD)
The abbreviated form of CD is compact disc, which is a flat, round optical storage medium invented by James Russell The first CD was made at the Philips Sun factory in Germany August 17, 1982 in.
Data is written on one side of the CD, and on the other side there is a label that says what is happening in the disc.
Tip: When we refer to a CD, DVD, or Blu-ray disc, it is called a “disc” and not a “disc.” Whereas if you talk about magnetic media like a floppy disk or a hard drive, it will be called ” disk ” it is said not to ” disk and
Why is the CD used in the computer?
As we knew earlier that CDs are used to store data that can be retrieved or executed later. Programs are also stored on CDs which are then loaded into the computer.
They are used to save files as a backup or to transfer them to another system. Together they are also used to hold music.
What is a DVD?
In 1995, Philips and Sony introduced a new type of disc called DVD. That’s a close 4.7GB capable of storing major data, such as high-resolution digital video files.
A DVD also has the same dimensions as a standard CD, but it cannot be read by a standard CD player, but a DVD player can easily read standard CDs.
DVD players use a high-powered red laser (0.65 µm) which enables the use of smaller pits (0.4 µm) and separation paths (0.74 µm).
In 2002, two competing (and incompatible) technologies for storing video in a CD-ROM sized disk in high definition were introduced.
It had the first HD DVD , which was proposed by Toshiba and NEC Corporation, and the other was a blue-beam disc , proposed by Sony, which used blue-violet lasers with a higher wavelength.
It also packed the data more closely into smaller pits, than an HD DVD.
Due to the advancement of technology, the storage capacity of the medium has increased greatly, due to the storage media only HD DVD and Blu-ray Discs have been dominant. It was used to store data of about 15 GB and 25 GB at that time.
full format dvd
Full Format of DVD in Hindi Versatile DVD and
What is the difference between CD and DVD
Let’s try to understand the difference between these two techniques.
| CD | DVD | |
| represent | CD | Versatile digital tablet |
| What is the purpose | CDs are made to store audio and program files. | DVD discs are made for storing video files, movie files, and programs. |
| Media type | optical discs | optical discs |
| encryption | Different | Different |
| eligibility | Typically up to 700MB (80 minutes of audio) | DVD range from 4.7 GB to 17.08 GB. |
| What is its reading mechanism ? | 780 nm wavelength (infrared and red edge) semiconductor laser 1200 kip/s (1×) | 650 nm laser 10.5 Mbit/s (1 x) |
| What is the writing mechanism ? | 1200 kip/s (1 x) | 10.5 Mbit/s (1 x) |
| Species | CD-R CD-RW CD-Text CD + Graphics CD + Extended Graphics Super Audio CD-MIDI CD-ROM Video CD Super Video CD Photo CD-I Enhanced CD VinylDisc and Bootable CD | DVD-RW DVD + RW DVD-RAM and Blu-Ray. |
| who developed ? | Philips Sony | Philips Sony Toshiba and Panasonic |
How much data can a CD contain?
Standard CD is capable of holding 72 minutes of music or 650 MB of data hold. There is one 80 minute CD capable of holding 700 megabytes of data.
What storage device was used before the CD?
Before the CD, there were many storage media that were used. But the most common storage media was before the CD. 3.5″ floppy disk and
What storage devices came after the CD?
The CD was first introduced in the 1980s and after that many of these methods were used to store and retrieve data. By the way, the common replacement for CDs are DVD and Blu-ray discs. In these disks, a lot of data is stored simultaneously.
Where is the CD in the computer?
If you’re talking about a ROM, it will be located in the section at the top of your desktop computer’s computer case. Whereas if you talk about a laptop, it is located on the right or left side.
What did you learn today
I hope you like my article What is a CD You MUST have loved it. I’ve always been trying to give my readers complete information about what a CD writer is, so that they don’t have to search any other sites or the internet in the context of that article.
This will also save their time and they will also have all the information in one place. If you have any doubts about this article or if you want there to be some improvement in it, you can write low comments on it.
If you liked this post what is cd or learned something, please share this post on social networks like Facebook, Twitter, etc.
