What benefits does Blu-ray provide over HD-DVD?
Though similar in many ways, there are some important differences between Blu-ray and HD-DVD. First off is the capacity. Because Blu-ray employs a lens with a greater numerical aperture (NA) than HD-DVD, the laser spot can be focused with greater precision to fit more data on the same size disc. This allows Blu-ray to hold 25GB per layer (50GB on a dual-layer disc), compared to HD-DVD which can only hold 15GB per layer (30GB on a dual-layer disc). Blu-ray has also adopted a higher data transfer rate for video and audio, 54Mbps vs HD-DVD’s 36.55Mbps. The greater capacity and data transfer rates for Blu-ray will enable the movie studios to release their movies with superior quality for both video and audio. Secondly is the content. The Blu-ray format has received overwhelming support from the major movie studios as a successor to today’s DVD format. Warner, Paramount, Fox, Disney, Sony, MGM and Lionsgate have all released titles for Blu-ray, whereas only Paramount and Universal have rele
