All You Need To Know About CD, DVD And Blu-Ray
If you are a lover of music, movies or videos you probably have a collection of CD’S, DVD’s and Blu-ray discs in your house.
In the late 90’s music CDs were very popular. Your computer is usually at risk of being affected by malware, thus storing your data on a compact disc will keep it save. This is just one of the benefits of using CD.
Although CD, DVD and Blu-Ray are all used to store sensitive data and other entertainment stuffs like music, they all come with different features.
Coming up with a decision on what kind of a disc to use depends on individual needs. Generally, people use CD’s to store music, DVD to store standard definition movies, and Blu-ray to store high definition videos.
Wondering why storing movies on a CD is next to impossible? CD’s comes with very small data storage space and capability.
Let’s Find Out More About CD, DVD, And Blu-Ray;
#Compact Disc (CD)
In most homes, you might find a collection of late 90’s music CD’s just sitting in the closet. What is a CD? This is a storage medium that is usually used to store video, audio, especially music, and information in digital form. The CD can also be used to record audio.
The best thing about CD is that it is lightweight thus making it portable. A standard compact disc comes with a capacity of about 650-700 MB of data, or 80 minutes of playback audio. When it comes to CD’s they have a very long history. The first commercial CD was introduced in the year 1982, and the first and most famous music CD was introduced to the market in early 1981.
With the rapid change in technology, the compact discs technologies have also improved. Nowadays there are numerous compact disc formats in the market which are better. With the introduction of PCs and the increase use of them worldwide, compact disc formats were adopted to store data.
Is the future of CDs coming to an end? We are living in the digital era and the use of CDs is declining. Why the sudden decline? With the introduction of digital formats like digital downloads and streaming audio, the use of CDs has lacked meaning.
Who would love to carry physical medium when all they have to do is subscribe to their favorite musician YouTube channel and watch the music?
Another thing that has led to the downfall of CD usage is the rise of DVDs and Blu-ray discs. The DVD features a larger storage space than CDs and they can be used to store videos and digital data too. You don’t have to worry on how to play the DVD, because computers nowadays come with DVD-ROM and also you can use a DVD player to do so.
The introduction of Blu-ray came as a replacement for both the CDs and DVDs for Blu-ray discs featured a more spacious capacity of 25 GB which allowed the storage of high-quality audio and videos.
Digital Versatile Disc (DVD)
DVDs were introduced to the world in 1995, although the DVD comes with the same dimension as a compact disc, it features higher storage capacity (4.7 GB). This format is usually used by the entertainment industry for storage of high-quality videos. However, it can also be used to store sensitive data, softwares and so on.
DVD gave people a chance to store what they couldn’t manage to on CD. This lead to the growth of music and movies industries, since the music they couldn’t store on CDs they can now store on DVD’s.
The introduction of DVD was still not enough people need more space to store high-quality videos and that’s the part where Blu-Ray comes in;
Where did the blu-ray discs name originate?
This format name originated from the type of laser required when burning the data onto the discs since it comes in violet and blue colors.
Due to their good quality in storage and other aspects, these discs are more expensive that CD’s and DVD’s.
#How Does CD’s, DVD’s And Blu-Rays Works?
Although these discs might look similar when it comes to their dimension and surfaces, they are indeed different in the inside.
How does a CD works? It focuses a laser (which is 780-nanometer wavelength and semiconductor too) onto a single track of the CD. While the CD is rotating, the beam of the laser measures the way the light is reflected differently off the polycarbonate layer on the bottom of the CD. It then converts it to the sounds needed. The problem with CD’s is that they can be easily scratched and are very fragile.
DVD’s has somehow replaced CD”s completely: but why and how? The DVD comes with higher storage capacity. In fact, it can store 7 times more data than an ordinary CD. With such a capacity the DVD is able to store high-quality videos too. The DVD features several layers of plastic about 1.2 mm thick.
Each layer consists of polycarbonate plastic. With DVD the tracks are very closer to each other thus allowing more tracks per a given disc. The DVD design allows the scanning of information from several DVD layers by changing the read layer focus.
With the growing technology comes increasing storage capacity. Blu-ray comes with a better reading capability. This is because it places data on a 1.1-millimeter thick layer of Polycarbonate. Having data on top prevents readability issues. There is a hard coating that covers this disc thus preventing scratches.
Most people out there use these discs to store information and read it when needed, but did you know you can also use can transfer information to them? This is what most people refer to us burning.
So how do you burn DVD’s, CD’s and Blu-ray discs? Although a CD burner can’t be used to burner another other discs other than itself, DVD burners can burn both CD’s and DVD’s. But in case you need to burn the three discs (CD;s, DVD’s and Blu-ray) then you have to purchase a Blu-Ray Burner.
- How To Buy An Optical Disk – Reader Or Writer For Desktop Or Laptop?
- All About Optical Discs & How To Buy One – CD / DVD / BLU-RAY
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