How Do DVDs Work?

Despite its rather dated format, DVDs are still quite popular today. That’s why a lot of people might be curious as to how they actually work, especially those who have a keen interest in the field of engineering or entertainment. While it’s great to use Discount offers for the discs, knowing something about them might prove more valuable in the long-run.

Basics Of DVDs

In essence, DVDs are really just bigger versions of CDs that can hold significantly more data. Depending on the type of storage method used, a DVD could hold up to seven times more data than a CD. This is due to the layers of plastic that it is made of. Each of these layers is then encoded with data via a series of bumps and pits.

Think of it the same way as those large Vinyl Records, which have huge tracks that gramophone or Record player pins touch in order to produce sounds. In DVDs, these bumps and pits are much smaller in scale.

DVD Layers

A normal DVD that you can find anywhere would normally only have one layer of surface material which can record data. This is the type that would hold up to 4.5GB of data. That amount can go up based on the number of layers used. There’s the double layer approach, which naturally doubles the amount of data that can be stored. Then there’s the method of recording on both sides of the DVD which quadruples the amount of data stored.

That last method is not often used simply because it’s not practical. It’s mostly reserved for packages that need to come in only one disc and needs to hold a significant amount of data for preservation.

How Stuff Are Recorded In DVDs

Despite what many might believe, the data that DVDs contain are mostly compressed information. This means that the data of videos, audios, files, or software is compressed and turned into smaller bits in order to fit the disc. If this wasn’t done, it would take a whole lot more space to fit even just one movie in a DVD.

What players would then do is read this compressed data and uncompressed it so that it can be played. That’s why you need the right software to play DVDs. Shop Online and you’ll find them easily.