Blu-Ray and HD DVD

So does anyone know if will these new players play redbook CDs also?

Sgr

While current optical disc technologies such as DVD, DVD±R, DVD±RW, and DVD-RAM use a red laser to read and write data, the new format uses a blue-violet laser instead, hence the name Blu-ray. Despite the different type of lasers used, Blu-ray products can easily be made backwards compatible through the use of a BD/DVD/CD compatible optical pickup and allow playback of CDs and DVDs.

The benefit of using a blue-violet laser (405nm) is that it has a shorter wavelength than a red laser (650nm), which makes it possible to focus the laser spot with even greater precision. This allows data to be packed more tightly and stored in less space, so it's possible to fit more data on the disc even though it's the same size as a CD/DVD. This together with the change of numerical aperture to 0.85 is what enables Blu-ray Discs to hold 25GB/50GB.

(YES)

This is interesting stuff. After looking at the Blu-Ray and DVD sites, it does seem to be shaping up into another format war on the video side. I thought Blu-Ray was synonomous with HDDVD but it turns out HDDVD is a competing format from the dvd camp.The support of the computer industry will be critical and IBM is on the DVD side and Apple just signed on with Blu-Ray, though Blu-Ray also has HP and Dell and has greater storage capacity than HDDVD. Both sides have an impressive list of backers so it's going to take time to resolve. However, since they both use blue laser, I'm guessing that the difference will be in the disc rather than the player?

Lets not forget about Holographic recording which can hold up to 1000gigs. I smell yet another format change.

Cheers

The computer side loves blu-ray for the storage capacity. Hollywood wants HD-DVD so they don't need to spend as much on changing manufacturing.

There are blu-ray players from Panasonic, Sharp, and Sony already availible in the Japanese market.

I'm betting on blu-ray to win out this format war.