HD DVD, stands for High-Density Digital Versatile Disk, it is a "digital optical media format which is being developed as one standard for high-definition DVD. HD-DVD is similar to the competing Blu-ray Disc, which also uses the same CD sized (120 mm diameter) optical data storage media and 405 nm wavelength blue laser. The mandatory video codecs are MPEG-4 AVC (H.264), VC-1 and MPEG-2. The video resolution maximum for both are 1920x1080 24p or 50/60i HDTV."
What are the main differences in HD DVD and Blue Ray disks?
"HD-DVD is promoted by Toshiba, NEC, and Sanyo, and backed by four major film studios. The Blu-ray Disc is proposed by Sony.” The storage capacity for Blue Ray is 50 GB verse 30 GBfor HD DVD."
See the table form: http://en.wikipedia.org/wiki/HD_DVD#HD_DVD_.2F_Blu-ray_Disc_comparison for more detail.
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