What’s the difference between blue-ray And HD-DVD technologies?

about the same difference if you were to compare apples with a shovel

btw its bluray not blueray, even though it uses a blue laser but its called bluray. Bluray holds more information than HD dvd.

Thats all i know. Yea not very helpful but its a start :p

blue ray is ultraviolet’s rays.HD-DVD is to listen songs.

The the Blu-ray disc was devoloped by sony and the HD DVD was devolped by toshiba in a race of devoloping a Professional Disc for DATA .
Both systems use the same kind of 405nm wavelength blue-violet laser, but their optics differ in two ways. Since the Blu-ray disc has a tighter track pitch (the single thread of data that spirals from the inside of the disc all the way out , it can hold more pits (those microscopic 0s and 1s) on the same size disc as HD DVD even with a laser of the same wavelength.
The differing track pitch of the Blu-ray disc makes its pickup apertures differ, however—0.65 for HD DVD vs. 0.85 for Blu-ray—thus also making the two pickups technically incompatible despite using lasers of the same type. HD DVD discs also have a different surface layer (the clear plastic layer on the surface of the data—what you get fingerprints and scratches on) from Blu-ray discs. HD DVD use a 0.6 mm-thick surface layer, the same as DVD, while Blu-ray has a much smaller 0.1mm layer to help enable the laser to focus with that 0.85 aperture.
Blu-ray discs do not share the same surface layer thickness of DVDs .A special hard coating must also be applied to Blu-ray discs, so their surface is sufficiently resilient enough to protect the data a mere 0.1mm beneath—this also drives the cost up ……simply Blu-ray discs are more expensive, but hold more data—there, that’s all.
for example the deferance in capacity between them in Theoretical limit : blue-ray can hold up to 200gb and hd dvd just hold 60 gb …i hope i got your question answered ..good luck

Blue Ray out sells HD DVD 2 to 1.!! Most Studios prefer the Blue Ray format. More features. Far more recording time. The DVD wars are about over. Blue Ray is winning, hands down.!!! They are NOT the same format. You cannot play an HD DVD on a Blue Ray..!!

Toshiba announced today that they will stop to manufacture HD-DVD.

Blue Ray won the battle of standard.