Tuesday, January 21, 2014

Blu-Ray vs. DVD: What's the difference?

After looking around my surroundings for a few days I noticed my DVD/Blu-Ray Player, and I realized I still did not know the difference between the two or how either is made.

This picture shows how CDs (left), DVDs (middle) and Blu-Ray Discs are
inscribed. Image found at:
I did some research and found out that one of the biggest differences is that Blu-Ray Discs are made using a 405 nm “blue” laser diode; whereas DVDs are made using a “650 nm red laser diode”. The reason this is important is because the smaller diode allows for more information to be inscribed onto the disc.
If you couldn’t tell, the name Blu-Ray comes from the color of the laser diode used to create the discs. As mentioned it can hold more information, specifically Blu-Ray Discs can hold up to 9 hours worth of High Definition quality video on a 50 GB disc.
Sony revealed the first prototype Blu-Ray Discs in October of 2000, but the first prototype player was not sent to Japan until 2003. However, it took three more years before the Discs and players were officially released in 2006.
While looking at pictures people have taken of movies and the difference between Blu-Ray and DVDs is remarkable. The DVD cannot hold as much space, and it shows. The Blu-Ray disc has more detail and better coloring. Blu-Ray Discs will make DVDs obsolete, just as DVDs did to VHS tapes, because Blu-Ray gives sharp, crisp video quality, but as clear as DVD picture is, it also has a noticeable blur when compared to Blu-Ray discs.

No comments:

Post a Comment