HD DVD Vs Blu-ray

What is HD DVD?
HD DVD stands for High Definition Digital Versatile Discs. High Density Digital Versatile Disc is a digital optical media format. It has a capacity of 15 gigabytes per layer. HD DVD-ROM has a single-layer capacity of 15 GB, and a dual-layer capacity of 30 GB. High Definition DVD uses Blue Laser technology having a much shorter wavelength than the red laser technology used in current DVD. HD DVDs use the same blue laser technology that Blu-Ray technology uses in order to store more data.  

HD DVD is a new high definition video disc standard that delivers up to six times the image quality of standard DVD movies. On March 31, 2006, Toshiba released their first HD DVD player in Japan. HD DVD is less costly to manufacture than Blu-Ray discs. 

What is Blu-ray?
Blu-ray is similar to HD but it uses a blue-violet laser, developed by the Blu-ray Disc Association (BDA). The benefit of using a blue-violet laser (405nm) is that it has a shorter wavelength than a red laser (650nm). Currently, Blu-ray discs have a higher storage capacity than HD DVD discs. Blu-ray has a large capacity up to 25GB of storage on a single-sided disc and 50GB on a double-sided disc. Lots of company starts to produce blu-ray player.