Blu-ray DVD frontpage size

[dadkins]

Originally Posted by tlmaclennan

I'm not saying that we should be calling it Blu-ray DVD CD, but to say that Blu-ray, DVD, and CD are all entirely different is technically wrong. Yes they use different technologies to get more capacity on the same size disc allowing for more HD video and audio, but they are all still on the same type of disc. They are all on an optical disc storage medium, as Wikipedia points out.

Just because new and more efficient lasers are used doesn't mean the disc has changed much.

On a CD player, you cannot play a DVD or a Blu-ray Disc.
On a DVD player, you might be able to play a CD(Most do), and you can play DVDs but not Blu-ray Discs.
On a Blu-ray player, most will play CDs, DVDs, and of course - Blu-ray Discs.

To say they are the same is wrong.
They are all 12cm optical discs.
They are all different in format, what they can do, and the storage capacities.

Here is a disc.
Why doesn't this play in my DVD player?
Because - it's a Blu-ray Disc.